From 617819eb61c7337a0b14b6c7c782b21b9eaf21af Mon Sep 17 00:00:00 2001
From: Danilo Cesa <dev.github@dan.dcesa.cc>
Date: Sat, 9 Aug 2025 17:27:25 +0800
Subject: [PATCH] Re-upload to own selfhosted git

---
 .gcloudignore                                 |  20 +++
 .gitignore                                    |   9 +
 Dockerfile                                    |   7 +
 app.yaml                                      |   6 +
 cloudbuild.yaml                               |  22 +++
 compute_engine.tf                             |  67 +++++++
 main.py                                       | 118 +++++++++++++
 requirements.txt                              |  67 +++++++
 src/bot/exceptions.py                         |  22 +++
 src/bot/repository.py                         | 121 +++++++++++++
 src/bot/router.py                             |  36 ++++
 src/bot/schemas.py                            |  46 +++++
 src/bot/service.py                            |  89 ++++++++++
 src/chat/callback.py                          |  56 ++++++
 src/chat/document_loader.py                   |  30 ++++
 src/chat/index.py                             | 166 ++++++++++++++++++
 src/chat/model_manager.py                     |  30 ++++
 src/chat/schemas.py                           |  21 +++
 src/chat/services/cohere.py                   |  29 +++
 src/chat/services/model_service.py            |   9 +
 src/chat/services/openai.py                   |  17 ++
 src/config.py                                 |  46 +++++
 src/conversation/exceptions.py                |   0
 src/conversation/repository.py                |  20 +++
 src/conversation/router.py                    |  16 ++
 src/conversation/schema.py                    |   0
 src/conversation/service.py                   |  25 +++
 src/etl/data_transformation_service.py        |  84 +++++++++
 src/etl/document_loaders/csv_json_loader.py   |  23 +++
 .../document_loaders/data_loader_strategy.py  |   6 +
 src/etl/document_loaders/pdf_loader.py        |  50 ++++++
 src/etl/exceptions.py                         |   8 +
 src/etl/repository.py                         | 114 ++++++++++++
 src/etl/router.py                             |  12 ++
 src/etl/service.py                            |  43 +++++
 src/files/exceptions.py                       |   9 +
 src/files/repository.py                       |  22 +++
 src/files/router.py                           |  80 +++++++++
 src/files/service.py                          |  42 +++++
 src/gcp/bigquery.py                           |  30 ++++
 src/gcp/storage.py                            |   6 +
 src/helpers/token_helper.py                   |  18 ++
 src/login/repository.py                       |   0
 src/login/router.py                           |  12 ++
 src/login/service.py                          |  38 ++++
 src/users/__init__.py                         |   0
 src/users/exceptions.py                       |  51 ++++++
 src/users/repository.py                       |  96 ++++++++++
 src/users/router.py                           |  30 ++++
 src/users/schemas.py                          |  35 ++++
 src/users/service.py                          |  50 ++++++
 src/websocket/websocket_manager.py            |  19 ++
 templates/index.html                          |  40 +++++
 templates/knowledge-base.html                 |  92 ++++++++++
 templates/upload-tester.html                  |  13 ++
 templates/websocket-tester.html               |  50 ++++++
 56 files changed, 2168 insertions(+)
 create mode 100644 .gcloudignore
 create mode 100644 .gitignore
 create mode 100644 Dockerfile
 create mode 100644 app.yaml
 create mode 100644 cloudbuild.yaml
 create mode 100644 compute_engine.tf
 create mode 100644 main.py
 create mode 100644 requirements.txt
 create mode 100644 src/bot/exceptions.py
 create mode 100644 src/bot/repository.py
 create mode 100644 src/bot/router.py
 create mode 100644 src/bot/schemas.py
 create mode 100644 src/bot/service.py
 create mode 100644 src/chat/callback.py
 create mode 100644 src/chat/document_loader.py
 create mode 100644 src/chat/index.py
 create mode 100644 src/chat/model_manager.py
 create mode 100644 src/chat/schemas.py
 create mode 100644 src/chat/services/cohere.py
 create mode 100644 src/chat/services/model_service.py
 create mode 100644 src/chat/services/openai.py
 create mode 100644 src/config.py
 create mode 100644 src/conversation/exceptions.py
 create mode 100644 src/conversation/repository.py
 create mode 100644 src/conversation/router.py
 create mode 100644 src/conversation/schema.py
 create mode 100644 src/conversation/service.py
 create mode 100644 src/etl/data_transformation_service.py
 create mode 100644 src/etl/document_loaders/csv_json_loader.py
 create mode 100644 src/etl/document_loaders/data_loader_strategy.py
 create mode 100644 src/etl/document_loaders/pdf_loader.py
 create mode 100644 src/etl/exceptions.py
 create mode 100644 src/etl/repository.py
 create mode 100644 src/etl/router.py
 create mode 100644 src/etl/service.py
 create mode 100644 src/files/exceptions.py
 create mode 100644 src/files/repository.py
 create mode 100644 src/files/router.py
 create mode 100644 src/files/service.py
 create mode 100644 src/gcp/bigquery.py
 create mode 100644 src/gcp/storage.py
 create mode 100644 src/helpers/token_helper.py
 create mode 100644 src/login/repository.py
 create mode 100644 src/login/router.py
 create mode 100644 src/login/service.py
 create mode 100644 src/users/__init__.py
 create mode 100644 src/users/exceptions.py
 create mode 100644 src/users/repository.py
 create mode 100644 src/users/router.py
 create mode 100644 src/users/schemas.py
 create mode 100644 src/users/service.py
 create mode 100644 src/websocket/websocket_manager.py
 create mode 100644 templates/index.html
 create mode 100644 templates/knowledge-base.html
 create mode 100644 templates/upload-tester.html
 create mode 100644 templates/websocket-tester.html

diff --git a/.gcloudignore b/.gcloudignore
new file mode 100644
index 0000000..8bc1111
--- /dev/null
+++ b/.gcloudignore
@@ -0,0 +1,20 @@
+# This file specifies files that are *not* uploaded to Google Cloud
+# using gcloud. It follows the same syntax as .gitignore, with the addition of
+# "#!include" directives (which insert the entries of the given .gitignore-style
+# file at that point).
+#
+# For more information, run:
+#   $ gcloud topic gcloudignore
+#
+.gcloudignore
+# If you would like to upload your .git directory, .gitignore file or files
+# from your .gitignore file, remove the corresponding line
+# below:
+.git
+.gitignore
+
+# Python pycache:
+__pycache__/
+# Ignored by the build system
+/setup.cfg
+venv/
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ba6237f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,9 @@
+venv
+__pycache__/
+.env
+text/
+.terraform.lock.hcl
+.terraform/
+terraform.tfstate
+terraform.tfstate.backup
+terraform.tfvars
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..b8826e5
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,7 @@
+FROM python:latest
+ENV APP_HOME /app
+WORKDIR $APP_HOME
+COPY . ./
+RUN pip install -r requirements.txt
+#CMD [ "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000" ]
+CMD exec gunicorn --bind :$PORT --workers 1 --worker-class uvicorn.workers.UvicornWorker  --threads 8 main:app
\ No newline at end of file
diff --git a/app.yaml b/app.yaml
new file mode 100644
index 0000000..005e235
--- /dev/null
+++ b/app.yaml
@@ -0,0 +1,6 @@
+runtime: python311
+# env: flex
+entrypoint: gunicorn -w 4 -k uvicorn.workers.UvicornWorker main:app
+instance_class: F4
+# network:
+#   session_affinity: true
\ No newline at end of file
diff --git a/cloudbuild.yaml b/cloudbuild.yaml
new file mode 100644
index 0000000..165896e
--- /dev/null
+++ b/cloudbuild.yaml
@@ -0,0 +1,22 @@
+steps:
+ # Build the container image
+ - name: 'gcr.io/cloud-builders/docker'
+   args: ['build', '-t', 'gcr.io/multichannel-chat-widget/backend:$COMMIT_SHA', '.']
+ # Push the container image to Container Registry
+ - name: 'gcr.io/cloud-builders/docker'
+   args: ['push', 'gcr.io/multichannel-chat-widget/backend:$COMMIT_SHA']
+ # Deploy container image to Cloud Run
+ - name: 'gcr.io/google.com/cloudsdktool/cloud-sdk'
+   entrypoint: gcloud
+   args:
+   - 'run'
+   - 'deploy'
+   - 'backend'
+   - '--image'
+   - 'gcr.io/multichannel-chat-widget/backend:$COMMIT_SHA'
+   - '--region'
+   - 'asia-east1'
+   - '--port'
+   - '8000'
+images:
+ - 'gcr.io/multichannel-chat-widget/backend:$COMMIT_SHA'
\ No newline at end of file
diff --git a/compute_engine.tf b/compute_engine.tf
new file mode 100644
index 0000000..467937f
--- /dev/null
+++ b/compute_engine.tf
@@ -0,0 +1,67 @@
+terraform {
+  required_providers {
+    google = {
+      source = "hashicorp/google"
+      version = "4.74.0"
+    }
+  }
+}
+
+
+provider "google" {
+  project     = "multichannel-chat-widget"
+  region      = "asia-east1"
+}
+
+resource "google_compute_network" "vpc_network" {
+  name                    = "multichannel-chat-network"
+  auto_create_subnetworks = false
+  mtu                     = 1460
+}
+
+resource "google_compute_subnetwork" "default" {
+  name          = "multichannel-chat-subnet"
+  ip_cidr_range = "10.0.1.0/24"
+  region        = "asia-east1"
+  network       = google_compute_network.vpc_network.id
+
+}
+
+
+# Create a single Compute Engine instance
+resource "google_compute_instance" "default" {
+  name         = "multichannel-chat-vm"
+  machine_type = "f1-micro"
+  zone         = "asia-east1-a"
+  tags         = ["ssh"]
+
+  boot_disk {
+    initialize_params {
+      image = "debian-cloud/debian-11"
+    }
+  }
+
+  # Install requirements
+  metadata_startup_script = "sudo apt-get update; sudo apt-get install -yq build-essential python3-pip rsync; pip install -r requirements.txt"
+
+  network_interface {
+    subnetwork = google_compute_subnetwork.default.id
+
+    access_config {
+      # Include this section to give the VM an external IP address
+    }
+  }
+}
+
+resource "google_compute_firewall" "ssh" {
+  name = "allow-ssh"
+  allow {
+    ports    = ["22"]
+    protocol = "tcp"
+  }
+  direction     = "INGRESS"
+  network       = google_compute_network.vpc_network.id
+  priority      = 1000
+  source_ranges = ["0.0.0.0/0"]
+  target_tags   = ["ssh"]
+}
\ No newline at end of file
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..f602b7e
--- /dev/null
+++ b/main.py
@@ -0,0 +1,118 @@
+import os
+import sys
+import uvicorn
+from fastapi import FastAPI, WebSocket, WebSocketDisconnect, Request
+from fastapi.responses import HTMLResponse
+from fastapi.staticfiles import StaticFiles
+from fastapi.templating import Jinja2Templates
+from fastapi.middleware.cors import CORSMiddleware
+from dotenv import load_dotenv
+
+from src.websocket.websocket_manager import ConnectionManager
+from src.users.router import router as user_router
+from src.files.router import router as file_router
+from src.bot.router import router as bot_router
+from src.etl.router import router as etl_router
+from src.login.router import router as login_router
+from src.conversation.router import router as conversation_router
+
+from src.chat.index import chat_manager
+from src.chat.callback import StreamingLLMCallbackHandler
+from src.chat.schemas import ChatResponse
+
+load_dotenv()
+
+tags_metadata = [
+    {
+        "name": "users",
+        "description": "Operations with users.",
+    },
+    {
+        "name": "files",
+        "description": "Operations with file handling.",
+    },
+    {
+        "name": "bot",
+        "description": "Operations with bot.",
+    },
+    {
+        "name": "etl",
+        "description": "Operations with ETL process.",
+    },
+     {
+        "name": "conversations",
+        "description": "Operations with conversations process.",
+    },
+
+]
+
+
+app = FastAPI(openapi_tags=tags_metadata)
+
+
+app.mount("/static", StaticFiles(directory="templates"), name="static")
+templates = Jinja2Templates(directory="templates")
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=False,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+app.include_router(user_router)
+app.include_router(file_router)
+app.include_router(bot_router)
+app.include_router(etl_router)
+app.include_router(login_router)
+app.include_router(conversation_router)
+
+
+@app.get("/",response_class=HTMLResponse)
+async def read_index(request: Request):
+    return templates.TemplateResponse("index.html", {"request": request})
+
+
+@app.get("/knowledge-base",response_class=HTMLResponse, tags=["ui"])
+async def read_index(request: Request):
+    return templates.TemplateResponse("knowledge-base.html", {"request": request})
+
+
+@app.get("/websocket-tester",response_class=HTMLResponse,  tags=["tester"], summary="UI for testing websocket")
+async def read_index(request: Request):
+    return templates.TemplateResponse("websocket-tester.html", {"request": request})
+
+@app.get("/upload-tester",response_class=HTMLResponse,  tags=["tester"], summary="UI for testing file upload")
+async def read_index(request: Request):
+    return templates.TemplateResponse("upload-tester.html", {"request": request})
+
+
+manager = ConnectionManager()
+
+@app.websocket("/ws")
+async def websocket_endpoint(websocket: WebSocket):
+    await manager.connect(websocket)
+
+    while True:
+        try:
+            data = await websocket.receive_json()
+            q = data["message"]
+
+            stream_handler = StreamingLLMCallbackHandler(websocket)
+            await websocket.send_text(".-botResponseStartStreaming")
+            response = await chat_manager.chat_response({
+                "question": q,
+                "chat_session": data["chat_session"],
+                "bot_id": data["bot_id"],
+                "stream_handler": stream_handler,
+            })
+
+            await websocket.send_text(".-botResponseEndStreaming")
+        except WebSocketDisconnect:
+            manager.disconnect(websocket)
+            # await websocket.send_text(f"Connection lost")
+
+if __name__ == "__main__":
+    uvicorn.run(app, host='0.0.0.0', port=int(os.environ.get('PORT', 8000)), reload=True)
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..56c65ee
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,67 @@
+aiohttp==3.8.4
+aiosignal==1.3.1
+anyio==3.7.0
+async-timeout==4.0.2
+attrs==23.1.0
+certifi==2023.5.7
+charset-normalizer==3.1.0
+click==8.1.3
+dataclasses-json==0.5.8
+dnspython==2.3.0
+exceptiongroup==1.1.1
+fastapi==0.98.0
+frozenlist==1.3.3
+greenlet==2.0.2
+gunicorn==20.1.0
+h11==0.14.0
+httptools==0.5.0
+idna==3.4
+langchain==0.0.306
+langchainplus-sdk==0.0.17
+loguru==0.7.0
+marshmallow==3.19.0
+marshmallow-enum==1.5.1
+multidict==6.0.4
+mypy-extensions==1.0.0
+numexpr==2.8.4
+numpy==1.25.0
+openapi-schema-pydantic==1.2.4
+packaging==23.1
+pinecone-client==2.2.2
+pydantic==1.10.9
+python-dateutil==2.8.2
+python-dotenv==1.0.0
+PyYAML==6.0
+regex==2023.6.3
+requests==2.31.0
+six==1.16.0
+sniffio==1.3.0
+SQLAlchemy==2.0.16
+starlette==0.27.0
+tenacity==8.2.2
+tiktoken==0.4.0
+tqdm==4.65.0
+typing-inspect==0.9.0
+typing_extensions==4.6.3
+urllib3==2.0.3
+uvicorn==0.22.0
+uvloop==0.17.0
+watchfiles==0.19.0
+websockets==11.0.3
+yarl==1.9.2
+google-cloud-bigquery==3.11.3
+google-api-python-client==2.93.0
+cohere==4.16.0
+redis
+openai
+jinja2
+google-cloud-bigquery[pandas]
+python-multipart==0.0.6
+google-cloud-storage
+PyPDF2
+fsspec
+pandas
+gcsfs
+pyarrow
+pydantic[email]
+fastapi-login
\ No newline at end of file
diff --git a/src/bot/exceptions.py b/src/bot/exceptions.py
new file mode 100644
index 0000000..1d3a719
--- /dev/null
+++ b/src/bot/exceptions.py
@@ -0,0 +1,22 @@
+from fastapi import HTTPException
+
+from src.bot.repository import repository
+
+def has_bot_parameter(bot_id):
+  if not bot_id:
+    print("Exception: Bot id is not provided")
+    raise HTTPException(status_code=400, detail="Bot id is not provided")
+  else:
+    pass
+
+def is_bot_id_valid(bot_id):
+  bot_settings = repository.get_bot_settings(bot_id)
+  if len(bot_settings) == 0:
+    print("Exception: Bot not found")
+    raise HTTPException(status_code=404, detail="Bot not found")
+  if not bot_settings:
+    print("BotService-> get_bot_settings func-> Error occured while fetching bot settings:")
+    for error in bot_settings:
+      print(error)
+  else:
+    return bot_settings
\ No newline at end of file
diff --git a/src/bot/repository.py b/src/bot/repository.py
new file mode 100644
index 0000000..84ef968
--- /dev/null
+++ b/src/bot/repository.py
@@ -0,0 +1,121 @@
+from uuid import uuid4
+from abc import ABC, abstractmethod
+from src.config import TBL_BOT_SET, TBL_USER_BOT, VW_USER_BOT_LATEST
+from src.gcp.bigquery import executor, client
+from src.bot.schemas import BotCreateModel, BotUpdateModel
+
+# Define the interface (abstract base class) for the Bot_SettingsRepository
+class BotsRepositoryInterface(ABC):
+  @abstractmethod
+  def get_bot_by_user_id(self, user_id):
+    pass
+
+  @abstractmethod
+  def save_bot_settings(self, bot_settings = BotCreateModel):
+    pass
+
+  @abstractmethod
+  def update_bot_settings(self, bot_settings = BotUpdateModel):
+    pass
+
+  # @abstractmethod
+  # def delete_bot_settings(self, user_id):
+  #   pass
+
+
+# Concrete implementation of the bot_settingsRepository using BigQuery
+class BotRepositoryBigQuery(BotsRepositoryInterface):
+  def __init__(self, executor):
+    self._executor = executor
+
+  def get_bot_by_user_id(self, user_id):
+    query = f"SELECT * FROM `{VW_USER_BOT_LATEST}` WHERE user_id = '{user_id}'"
+    return self._executor.execute_query(query)
+
+
+  def save_user_bot(self,user_id):
+    id =  str(uuid4())
+    row_to_insert = {
+      "id": id,
+      "user_id" : user_id
+    }
+
+    errors = client.insert_rows_json(TBL_USER_BOT, [row_to_insert])
+
+    if not errors:
+      return id
+    else:
+      msg = f"Errors occurred while saving bot for user {user_id}: {errors}"
+      print(msg)
+      return {"message":msg}
+
+  def save_bot_settings(self, bot_settings = BotCreateModel):
+    bot_id = self.save_user_bot(bot_settings['user_id'])
+    row_to_insert = {
+      "id": str(uuid4()),
+      "bot_id": bot_id,
+      "title": bot_settings['title'],
+      "description": bot_settings["description"],
+      "chat_styles": bot_settings['chat_styles'],
+      "initial_message": bot_settings['initial_message'],
+      "message_suggestion": bot_settings['message_suggestion'],
+      "allow_feedback_response": bot_settings["allow_feedback_response"],
+      "show_source_in_response": bot_settings["show_source_in_response"],
+      "advance_settings": bot_settings["advance_settings"]
+    }
+
+    errors = client.insert_rows_json(TBL_BOT_SET, [row_to_insert])
+
+    if not errors:
+      msg = f"Bot settings for bot {bot_id} saved successfully."
+      print(msg)
+      return {"message":msg}
+    else:
+      msg = f"Errors occurred while saving bot settings for bot_id: {bot_id}: {errors}"
+      print(msg)
+      return {"message":msg}
+
+  def get_bot_settings(self,bot_id):
+    query = f"SELECT * FROM `{VW_USER_BOT_LATEST}` WHERE bot_id = '{bot_id}'"
+    return self._executor.execute_query(query)
+
+  def update_bot_settings(self, bot_settings = BotUpdateModel):
+    row_to_insert = {
+      "id": str(uuid4()),
+      "bot_id": bot_settings['bot_id'],
+      "title": bot_settings['title'],
+      "description": bot_settings["description"],
+      "chat_styles": bot_settings['chat_styles'],
+      "initial_message": bot_settings['initial_message'],
+      "message_suggestion": bot_settings['message_suggestion'],
+      "allow_feedback_response": bot_settings["allow_feedback_response"],
+      "show_source_in_response": bot_settings["show_source_in_response"],
+      "advance_settings": bot_settings["advance_settings"]
+    }
+
+    errors = client.insert_rows_json(TBL_BOT_SET, [row_to_insert])
+
+    if not errors:
+      msg = f"Bot settings for bot {bot_settings['bot_id']} saved successfully."
+      print(msg)
+      return {"message":msg}
+    else:
+      msg = f"Errors occurred while saving bot settings for bot_id: {bot_settings['bot_id']}: {errors}"
+      print(msg)
+      return {"message":msg}
+
+  # def delete_bot_settings(self, user_id):
+  #   # Delete the row from the BigQuery table
+  #   delete_condition = f"user_id = '{user_id}'"
+  #   errors = client.delete_rows(f"{BIGQUERY_SCHEMA}.bot_settings", delete_condition)
+
+  #   if not errors:
+  #     msg = f"UI settings for user {user_id} deleted successfully."
+  #     print(msg)
+  #   else:
+  #     msg = f"Errors occurred while deleting UI settings for user {user_id}: {errors}"
+  #     print(msg)
+
+  #   return msg
+
+repository = BotRepositoryBigQuery(executor)
diff --git a/src/bot/router.py b/src/bot/router.py
new file mode 100644
index 0000000..f45ffdf
--- /dev/null
+++ b/src/bot/router.py
@@ -0,0 +1,36 @@
+from fastapi import APIRouter, Body, Depends
+
+from src.bot.service import bot_service
+from src.bot.schemas import BotCreateModel, BotUpdateModel, BotResponseModel
+from src.login.service import manager
+
+router = APIRouter()
+
+@router.get("/bot/{user_id}", tags=["bot"], summary="Get user bot")
+async def get_user_bot(user_id: str,user=Depends(manager)):
+    return await bot_service.get_user_bot(user_id)
+
+@router.post("/bot/", tags=["bot"], summary="Create user bot")
+async def post_bot(bot_settings: BotCreateModel = Body(...),user=Depends(manager)):
+    # print(bot_settings)
+    return await bot_service.create_bot(bot_settings)
+
+#Bot settings
+@router.get("/bot/settings/{bot_id}", tags=["bot"], summary="Get bot settings")
+async def get_bot_settings(bot_id: str):
+    result = await bot_service.get_bot_settings(bot_id)
+    return result[0]
+
+@router.put("/bot/settings/", tags=["bot"], summary="Update bot settings")
+async def put_bot(bot_settings: BotUpdateModel = Body(...),user=Depends(manager)):
+    return await bot_service.update_bot_settings(bot_settings)
+
+
+# @router.delete("/ui_settings/{user_id}", tags=["ui-settings"], summary="Update user ui settings")
+# async def delete_ui_settings(
+#   user_id: str,
+# ):
+#   """
+#     This is my description of the API endpoint
+#   """
+#   return await delete_ui_settings(user_id)
\ No newline at end of file
diff --git a/src/bot/schemas.py b/src/bot/schemas.py
new file mode 100644
index 0000000..a50651b
--- /dev/null
+++ b/src/bot/schemas.py
@@ -0,0 +1,46 @@
+from pydantic import BaseModel, Json
+from typing import Dict, Union
+from datetime import datetime
+
+class BotCreateModel(BaseModel):
+    user_id: str
+    title: str
+    description: Union[str, None]
+    chat_styles: Dict
+    initial_message: Union[str, None]
+    message_suggestion: Union[Dict, None]
+    allow_feedback_response: Union[bool, None]
+    show_source_in_response: Union[bool, None]
+    advance_settings: Dict
+
+
+class BotResponseModel(BaseModel):
+    bot_id: str
+    title: str
+    description: Union[str, None]
+    chat_styles: Json
+    initial_message: Union[str, None]
+    message_suggestion: Json
+    allow_feedback_response: Union[bool, None]
+    show_source_in_response: Union[bool, None]
+    advance_settings: Json
+    updated_at: datetime
+    created_at: datetime
+
+class BotListResponseModel(BaseModel):
+    bot_id: str
+    title: str
+    data_source_count: Union[int, None]
+    updated_at: datetime
+    created_at: datetime
+
+class BotUpdateModel(BaseModel):
+    bot_id: str
+    title: str
+    description: Union[str, None]
+    chat_styles: Dict
+    initial_message: Union[str, None]
+    message_suggestion: Dict
+    allow_feedback_response: Union[bool, None]
+    show_source_in_response: Union[bool, None]
+    advance_settings: Dict
diff --git a/src/bot/service.py b/src/bot/service.py
new file mode 100644
index 0000000..fe488d1
--- /dev/null
+++ b/src/bot/service.py
@@ -0,0 +1,89 @@
+import json
+
+from src.bot.repository import repository
+from src.bot.schemas import BotResponseModel, BotCreateModel, BotUpdateModel,BotListResponseModel
+from src.users.exceptions import is_user_valid, has_user_bot
+from src.bot.exceptions import has_bot_parameter, is_bot_id_valid
+
+class BotService:
+  def __init__(self, repository: repository):
+    self.repository = repository
+
+  async def get_user_bot(self, user_id: str) -> list[BotListResponseModel]:
+    is_user_valid(user_id)
+    bot_settings = self.repository.get_bot_by_user_id(user_id)
+    has_user_bot(bot_settings)
+    if isinstance(bot_settings, dict):
+      bot_settings = [bot_settings]
+
+    return [
+      BotListResponseModel(**settings)
+      for settings in bot_settings
+    ]
+
+  async def create_bot(self, bot_settings_dto: BotCreateModel) -> dict[str, str]:
+    is_user_valid(bot_settings_dto.user_id)
+
+    self._validate_json_fields(bot_settings_dto)
+    bot_settings_data = self._convert_json_fields(bot_settings_dto)
+    bot_settings_data['user_id'] = bot_settings_dto.user_id
+    response = self.repository.save_bot_settings(bot_settings_data)
+
+    return {"message": response}
+
+  async def get_bot_settings(self, bot_id: str) -> BotResponseModel:
+    has_bot_parameter(bot_id)
+    bot_settings = is_bot_id_valid(bot_id)
+    return self._create_response_dto_list(bot_settings)
+
+  async def update_bot_settings(self, bot_settings_dto: BotUpdateModel) -> dict[str, str]:
+    is_bot_id_valid(bot_settings_dto.bot_id)
+
+    self._validate_json_fields(bot_settings_dto)
+    bot_settings_data = self._convert_json_fields(bot_settings_dto)
+    bot_settings_data['bot_id'] = bot_settings_dto.bot_id
+
+    response = self.repository.update_bot_settings(bot_settings_data)
+
+    return {"message": response}
+
+  def _convert_json_fields(self, dto):
+    return {
+      "title": dto.title,
+      "description": dto.description,
+      "chat_styles": json.dumps(dto.chat_styles),
+      "message_suggestion": json.dumps(dto.message_suggestion),
+      "initial_message": dto.initial_message,
+      "advance_settings": json.dumps(dto.advance_settings),
+      "allow_feedback_response": dto.allow_feedback_response,
+      "show_source_in_response": dto.show_source_in_response
+    }
+
+  def _validate_json_fields(self, dto):
+    # Add any necessary validation for JSON fields here
+    pass
+
+  def _create_response_dto_list(self, settings_list):
+
+    if isinstance(settings_list, dict):
+      settings_list = [settings_list]
+
+    return [
+      BotResponseModel(
+        bot_id=settings['bot_id'],
+        title=settings['title'],
+        description=settings["description"],
+        chat_styles=settings['chat_styles'],
+        initial_message=settings['initial_message'],
+        message_suggestion=settings['message_suggestion'],
+        advance_settings=settings['advance_settings'],
+        allow_feedback_response=settings['allow_feedback_response'],
+        show_source_in_response=settings["show_source_in_response"],
+        updated_at=settings['updated_at'],
+        created_at=settings['created_at']
+      )
+      for settings in settings_list
+    ]
+
+
+bot_service = BotService(repository)
\ No newline at end of file
diff --git a/src/chat/callback.py b/src/chat/callback.py
new file mode 100644
index 0000000..0a79dd3
--- /dev/null
+++ b/src/chat/callback.py
@@ -0,0 +1,56 @@
+import json
+import time
+from datetime import datetime
+from typing import Any, List, Tuple, Optional, Dict
+
+from langchain.callbacks.base import AsyncCallbackHandler,BaseCallbackHandler
+from langchain.callbacks.streaming_stdout_final_only import FinalStreamingStdOutCallbackHandler
+from src.chat.schemas import ChatResponse
+
+
+class StreamingLLMCallbackHandler(FinalStreamingStdOutCallbackHandler):
+    """Callback handler for streaming LLM responses."""
+
+    def __init__(
+        self,
+        websocket,
+        answer_prefix_tokens: Optional[List[str]] = ['Final', 'Answer', ':']
+    ):
+        self.websocket = websocket
+        self.answer_prefix_tokens = [token.strip() for token in answer_prefix_tokens]
+        self.last_tokens = [""] * len(answer_prefix_tokens)
+        self.rolling_buffer = []
+
+    def on_llm_start(
+        self, serialized: Dict[str, Any], prompts: List[str], **kwargs: Any
+    ) -> None:
+        """Run when LLM starts running."""
+        self.answer_reached = False
+
+
+    async def on_llm_new_token(self, token: str, **kwargs: Any) -> None:
+
+        """Rewrite on_llm_new_token to send the final answer to the client."""
+        # Append the current token to the rolling buffer
+        self.rolling_buffer.append(token.strip())
+        print(' self.rolling_buffer: ',  self.rolling_buffer)
+
+        # Keep the buffer size to match the length of answer_prefix_tokens
+        if len(self.rolling_buffer) > len(self.answer_prefix_tokens):
+            self.rolling_buffer.pop(0)  # Remove the oldest token
+
+        # Check if the rolling buffer matches the answer_prefix_tokens
+        if self.rolling_buffer == self.answer_prefix_tokens:
+            self.answer_reached = True
+            print("token:", token)
+
+        # If the final answer has been reached, append the tokens to the final answer list
+        if self.answer_reached:
+            # resp = ChatResponse(sender="bot", message=token, type="stream")
+            await self.websocket.send_text(token)
+
+    async def on_llm_end(self, token: str, **kwargs: Any) -> None:
+        """Run when LLM ends running."""
+        print("LLM END")
+        # if self.answer_reached:
+        #     print('end')
\ No newline at end of file
diff --git a/src/chat/document_loader.py b/src/chat/document_loader.py
new file mode 100644
index 0000000..3de407d
--- /dev/null
+++ b/src/chat/document_loader.py
@@ -0,0 +1,30 @@
+from langchain.document_loaders import BigQueryLoader
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+#from langchain.document_loaders import DirectoryLoader
+
+from src.config import VW_BOT_CON_LATEST
+from src.helpers.token_helper import tiktoken_len
+
+
+text_splitter = RecursiveCharacterTextSplitter(
+    chunk_size=100,
+    chunk_overlap=25,
+    length_function=tiktoken_len,
+    separators=["\n\n", "\n", " ", ""]
+)
+
+def document_loader(bot_id):
+  query = f"SELECT data FROM `{VW_BOT_CON_LATEST}` where widget_id = '{bot_id}'"
+  # loader = DirectoryLoader(f'text/', glob='**/*.txt')
+  loader = BigQueryLoader(query,page_content_columns=["data"])
+  documents = loader.load()
+
+  # print(f"Documents loaded: {documents}")
+  # print (f'You have {len(documents)} document(s)')
+  num_words = sum([len(doc.page_content.split(' ')) for doc in documents])
+  # print (f'You have roughly {num_words} words in your docs')
+
+  # Split your documents into texts
+  texts = text_splitter.split_documents(documents)
+
+  return texts
diff --git a/src/chat/index.py b/src/chat/index.py
new file mode 100644
index 0000000..2b21abd
--- /dev/null
+++ b/src/chat/index.py
@@ -0,0 +1,166 @@
+import pinecone
+
+from langchain.vectorstores import Pinecone as PineconeStore
+from langchain.memory import ConversationBufferMemory
+from langchain.chains import RetrievalQA
+from langchain.memory.chat_message_histories import RedisChatMessageHistory
+# from langchain.vectorstores.redis import Redis
+from langchain.agents import initialize_agent, Tool
+from langchain.agents import AgentType
+
+from langchain.tools.render import render_text_description
+from langchain.agents.output_parsers import ReActSingleInputOutputParser
+from langchain.agents.format_scratchpad import format_log_to_str
+from langchain import hub
+from langchain.agents import AgentExecutor
+
+from src.config import REDIS_HOST, PINECONE_API_ENV, PINECONE_API_KEY, PINECONE_INDEX_NAME
+from src.chat.document_loader import document_loader
+from src.chat.model_manager import ModelManager
+from src.bot.service import bot_service
+
+class BaseMessage:
+  def __init__(self, question, result):
+      self.question = question
+      self.result = result
+
+class ChatManager:
+  def __init__(self):
+    self.chat_history = None
+    self.model_manager = ModelManager()
+    self.llm = None
+    self.redis_message_history = None
+
+  async def initialize(self, data):
+    try:
+      return await self.chat_response(data)
+    except Exception as e:
+        return f"--------------------There's an error occurred in initializing chat manager: {e}"
+
+  async def get_llm(self, data):
+    try:
+      bot_details = await bot_service.get_bot_settings(data["bot_id"])
+      bot_details = bot_details[0].advance_settings
+      llm_ecosystem = bot_details.llm_model if hasattr(bot_details, 'llm_model') else "openai"
+    except Exception as e:
+      return f"--------------------There's an error occurred in get llm method: {e}"
+
+    self.llm = self.model_manager.llm_selector(llm_ecosystem,data['stream_handler'])
+    return llm_ecosystem
+
+  def nlp_process(self, data):
+    embeddings = self.model_manager.embedding_selector(data["embedding"])
+    try:
+      self.redis_message_history = RedisChatMessageHistory(url=REDIS_HOST, ttl=600, session_id=data["chat_session"])
+      print('--------------------redis message_history: ', self.redis_message_history.messages)
+    except Exception as e:
+      print('error redischathistory: ', e)
+      return {"message": f"An error occurred : {e}"}
+    try:
+      memory = ConversationBufferMemory(memory_key="memory",chat_memory=self.redis_message_history, return_messages=True)
+      self.chat_history = memory
+      print('--------------------memory: ', memory)
+    except Exception as e:
+      print('error conversation buffer memory: ', e)
+      return {"message": f"An error occurred : {e}"}
+    try:
+      docs = document_loader(data["bot_id"])
+      print('--------------------docs: ', docs)
+    except Exception as e:
+      print('error document loader: ', e)
+      return {"message": f"An error occurred : {e}"}
+
+
+
+    try:
+      query =  data['question']
+      query_result = embeddings.embed_query(query)
+      doc_result = embeddings.embed_documents([t.page_content for t in docs])
+      print('--------------------Store embeddings to vector store: Pinecone')
+      pinecone.init(
+        api_key=PINECONE_API_KEY,  # find at app.pinecone.io
+        environment=PINECONE_API_ENV  # next to api key in console
+      )
+      index = pinecone.Index(PINECONE_INDEX_NAME)
+      # print(index.describe_index_stats())
+      # index.delete(deleteAll='true', namespace='')
+    except Exception as e:
+      print(f"--------------------Error on Pinecone process: {e}")
+
+    docsearch = PineconeStore.from_texts([t.page_content for t in docs], embeddings, index_name=PINECONE_INDEX_NAME)
+    retriever = self.model_manager.retriever_selector(data["retriever"], docsearch)
+    qa_tool = RetrievalQA.from_chain_type(
+      llm=self.llm, retriever=retriever, memory=memory,
+      verbose=True
+    )
+    return qa_tool
+
+  def custom_agent(self, tools):
+    max_iterations = 3
+    handle_parsing_errors = True
+    early_stopping_method="generate"
+    verbose=True
+    agent = AgentType.REACT_DOCSTORE
+    try:
+      return initialize_agent(
+        tools,
+        self.llm,
+        agent,
+        max_iterations,
+        handle_parsing_errors,
+        early_stopping_method,
+        verbose,
+        memory=self.chat_history,
+      )
+    except Exception as e:
+      return f"Error occured in custom agent function: {e}"
+
+  async def chat_response(self,data):
+    print(f"--------------------chat history: {self.chat_history}")
+    llm_ecosystem = await self.get_llm(data)
+    qa_tool = self.nlp_process({
+      "question": data["question"],
+      "chat_history": self.chat_history,
+      "embedding":llm_ecosystem,
+      "retriever":llm_ecosystem,
+      "bot_id":data["bot_id"],
+      "chat_session": data["chat_session"]
+    })
+
+    tools = [
+      Tool(
+          name='Document Store',
+          func=qa_tool.run,
+          description="Use it to lookup information from the document store. You must return a final answer, not an action. If you can't return a final answer, return you don't know the answer.",
+      ),
+    ]
+
+    prompt = hub.pull("hwchase17/react-chat")
+    prompt = prompt.partial(
+      tools=render_text_description(tools),
+      tool_names=", ".join([t.name for t in tools]),
+    )
+
+    llm_with_stop = self.llm.bind(stop=["\nObservation"])
+    try:
+        agent = {
+            "input": lambda x: x["input"],
+            "agent_scratchpad": lambda x: format_log_to_str(x['intermediate_steps']),
+            "chat_history": lambda x: x["memory"]
+        } | prompt | llm_with_stop | ReActSingleInputOutputParser()
+
+        agent_executor = AgentExecutor(agent=agent, tools=tools, verbose=True, memory=self.chat_history, max_iterations=3, early_stopping_method= 'generate')
+        result = agent_executor.invoke({"input": data["question"]})['output']
+
+        self.redis_message_history.add_user_message(data["question"])
+
+    except Exception as e:
+      return f"There's an error occured in chat response function: {e}"
+
+
+    print(f"Result: {result}")
+    self.redis_message_history.add_ai_message(result)
+
+    return result
+
+chat_manager = ChatManager()
\ No newline at end of file
diff --git a/src/chat/model_manager.py b/src/chat/model_manager.py
new file mode 100644
index 0000000..918a62c
--- /dev/null
+++ b/src/chat/model_manager.py
@@ -0,0 +1,30 @@
+from src.chat.services.cohere import CohereService
+from src.chat.services.openai import OpenAIService
+from src.chat.services.model_service import ModelService
+
+class ModelManager:
+  SUPPORTED_MODELS = {"cohere": CohereService, "openai": OpenAIService}
+  def __init__(self) -> None:
+    pass
+
+  def model_checker(self,model):
+    if model not in self.SUPPORTED_MODELS:
+      raise ValueError("Selected model not supported")
+    else:
+      return
+
+  def create_model_service(self, model) -> ModelService:
+        self.model_checker(model)
+        return self.SUPPORTED_MODELS[model]()
+
+  def retriever_selector(self, model, docsearch) -> str:
+    model_service = self.create_model_service(model)
+    return model_service.retriever(docsearch)
+
+  def embedding_selector(self, model) -> str:
+    model_service = self.create_model_service(model)
+    return model_service.embeddings()
+
+  def llm_selector(self, model, stream_handler = None) -> str:
+    model_service = self.create_model_service(model)
+    return model_service.llm(stream_handler)
\ No newline at end of file
diff --git a/src/chat/schemas.py b/src/chat/schemas.py
new file mode 100644
index 0000000..7b21d94
--- /dev/null
+++ b/src/chat/schemas.py
@@ -0,0 +1,21 @@
+from pydantic import BaseModel,validator
+
+
+class ChatResponse(BaseModel):
+  """Chat response schema."""
+
+  sender: str
+  message: str
+  type: str
+
+  @validator("sender")
+  def sender_must_be_bot_or_you(cls, v):
+    if v not in ["bot", "human"]:
+        raise ValueError("sender must be bot or human")
+    return v
+
+  @validator("type")
+  def validate_message_type(cls, v):
+      if v not in ["start", "stream", "end", "error", "info"]:
+          raise ValueError("type must be start, stream or end")
+      return v
diff --git a/src/chat/services/cohere.py b/src/chat/services/cohere.py
new file mode 100644
index 0000000..a4cc3cc
--- /dev/null
+++ b/src/chat/services/cohere.py
@@ -0,0 +1,29 @@
+import os
+
+from langchain.llms import Cohere
+from langchain.embeddings import CohereEmbeddings
+from langchain.retrievers import ContextualCompressionRetriever
+from langchain.retrievers.document_compressors import CohereRerank
+
+from src.chat.services.model_service import ModelService
+from src.config import COHERE_API
+
+os.environ["COHERE_API_KEY"] = COHERE_API
+
+LLM_COHERE = Cohere(cohere_api_key=COHERE_API)
+
+COMPRESSOR_COHERE = CohereRerank()
+
+EMBEDDINGS_COHERE = CohereEmbeddings(cohere_api_key=COHERE_API)
+
+class CohereService(ModelService):
+  def llm(self) -> str:
+    return LLM_COHERE
+
+  def embeddings(self) ->str:
+    return EMBEDDINGS_COHERE
+
+  def retriever(self,docsearch) -> str:
+    return ContextualCompressionRetriever(
+      base_compressor=COMPRESSOR_COHERE, base_retriever=docsearch.as_retriever()
+    )
\ No newline at end of file
diff --git a/src/chat/services/model_service.py b/src/chat/services/model_service.py
new file mode 100644
index 0000000..e8a0d81
--- /dev/null
+++ b/src/chat/services/model_service.py
@@ -0,0 +1,9 @@
+class ModelService:
+  def retriever(self, docsearch) -> str:
+      pass
+
+  def embeddings(self) -> str:
+      pass
+
+  def llm(self, stream_handler = None) -> str:
+      pass
\ No newline at end of file
diff --git a/src/chat/services/openai.py b/src/chat/services/openai.py
new file mode 100644
index 0000000..aa45d75
--- /dev/null
+++ b/src/chat/services/openai.py
@@ -0,0 +1,17 @@
+from langchain.llms import OpenAI
+from langchain.embeddings.openai import OpenAIEmbeddings
+from langchain.callbacks.manager import AsyncCallbackManager
+
+from src.config import OPENAI_API_KEY
+from src.chat.services.model_service import ModelService
+
+class OpenAIService(ModelService):
+  def llm(self,stream_handler) -> str:
+    stream_manager = AsyncCallbackManager([stream_handler])
+    return OpenAI(temperature=0, callback_manager=stream_manager, streaming=True, openai_api_key=OPENAI_API_KEY)
+
+  def embeddings(self) -> str:
+    return OpenAIEmbeddings(openai_api_key=OPENAI_API_KEY)
+
+  def retriever(self,docsearch) -> str:
+    return docsearch.as_retriever()
diff --git a/src/config.py b/src/config.py
new file mode 100644
index 0000000..68569ac
--- /dev/null
+++ b/src/config.py
@@ -0,0 +1,46 @@
+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+GCP_PROJECT_ID = os.environ.get("GCP_PROJECT_ID")
+
+OPENAI_API_KEY = os.environ.get("OPENAI_API_KEY")
+OPENAI_MODEL_NAME = os.environ.get("OPENAI_MODEL_NAME")
+
+PINECONE_API_KEY = os.environ.get("PINECONE_API_KEY")
+PINECONE_API_ENV = os.environ.get("PINECONE_API_ENV")
+PINECONE_INDEX_NAME = GCP_PROJECT_ID
+
+ENCODING_FOR_MODEL = os.environ.get("ENCODING_FOR_MODEL")
+ENCODING = os.environ.get("ENCODING")
+
+REDIS_HOST = os.environ.get("REDIS_HOST")
+REDIS_PASSWORD = os.environ.get("REDIS_PASSWORD")
+
+COHERE_API = os.environ.get("COHERE_API")
+
+SUPPORTED_MODEL = os.environ.get("SUPPORTED_MODEL")
+
+
+BIGQUERY_SCHEMA = f"{GCP_PROJECT_ID}.data_src"
+GCP_UPLOAD_BUCKET = os.environ.get("GCP_UPLOAD_BUCKET")
+
+
+#Table list
+TBL_KWNBASE_CON = f"{BIGQUERY_SCHEMA}.knowledgebase_content"
+TBL_KWNBASE_SRC = f"{BIGQUERY_SCHEMA}.knowledgebase_source"
+TBL_USER_BOT = f"{BIGQUERY_SCHEMA}.user_bot"
+TBL_BOT_SET = f"{BIGQUERY_SCHEMA}.bot_settings"
+TBL_USERS = f"{BIGQUERY_SCHEMA}.users"
+TBL_CUST_CHAT = f"{BIGQUERY_SCHEMA}.customer_chat"
+TBL_CUST_CHAT_LOGS = f"{BIGQUERY_SCHEMA}.customer_chat_logs"
+
+
+#View list
+VW_USER_LIST_LATEST = f"{BIGQUERY_SCHEMA}.vw_user_list_latest"
+VW_USER_BOT_LATEST = f"{BIGQUERY_SCHEMA}.vw_user_bot_latest"
+VW_USER_FILES_LATEST = f"{BIGQUERY_SCHEMA}.vw_user_files_latest"
+VW_BOT_CON_LATEST = f"{BIGQUERY_SCHEMA}.vw_latest_bot_knowledgebase_content"
+
+LOGIN_SECRET_KEY = os.environ.get("LOGIN_SECRET_KEY")
\ No newline at end of file
diff --git a/src/conversation/exceptions.py b/src/conversation/exceptions.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/conversation/repository.py b/src/conversation/repository.py
new file mode 100644
index 0000000..a23a9ad
--- /dev/null
+++ b/src/conversation/repository.py
@@ -0,0 +1,20 @@
+from src.gcp.bigquery import client, executor
+from src.config import TBL_CUST_CHAT,TBL_CUST_CHAT_LOGS
+
+class ConversationRepository:
+  def __init__(self, executor):
+    self._executor = executor
+
+  def save_temp_session(self, user_session, bot_id):
+    query = f"INSERT INTO`{TBL_CUST_CHAT}` (user_session,bot_id, is_online) VALUES ('{user_session}', '{bot_id}',TRUE)"
+    return self._executor.execute_query(query)
+
+  def get_customer_chat_session(self,customer_session):
+    query = f"SELECT id FROM `{TBL_CUST_CHAT}` WHERE user_session = '{customer_session}' AND is_online = TRUE ORDER BY updated_at LIMIT 1"
+    return self._executor.execute_query(query)
+
+  def get_chat_logs(self,chat_session):
+    query = f"SELECT * FROM `{TBL_CUST_CHAT_LOGS}` WHERE customer_chat_id = '{chat_session}'"
+    return self._executor.execute_query(query)
+
+repository = ConversationRepository(executor)
\ No newline at end of file
diff --git a/src/conversation/router.py b/src/conversation/router.py
new file mode 100644
index 0000000..a201635
--- /dev/null
+++ b/src/conversation/router.py
@@ -0,0 +1,16 @@
+from fastapi import APIRouter, Body, Depends
+
+# from src.bot.service import bot_service
+# from src.bot.schemas import BotCreateModel, BotUpdateModel, BotResponseModel
+from src.login.service import manager
+from src.conversation.service import conversation_service
+
+router = APIRouter()
+
+@router.get("/conversation/new/{bot_id}", tags=["conversations"], summary="Get user conversation session")
+async def get_user_conversation_session(bot_id: str):
+  return conversation_service.save_customer_chat(bot_id)
+
+@router.get("/conversation/logs/{chat_session}", tags=["conversations"], summary="Get conversation logs")
+async def get_conversation_logs(chat_session: str):
+  return conversation_service.get_chat_logs(chat_session)
\ No newline at end of file
diff --git a/src/conversation/schema.py b/src/conversation/schema.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/conversation/service.py b/src/conversation/service.py
new file mode 100644
index 0000000..b5d69c0
--- /dev/null
+++ b/src/conversation/service.py
@@ -0,0 +1,25 @@
+from uuid import uuid4
+from src.conversation.repository import repository
+
+class ConversationService:
+  def __init__(self, repository: repository):
+    self.repository = repository
+
+  def save_customer_chat(self,bot_id: str):
+    user_temp_session = str(uuid4())
+    try:
+      repository.save_temp_session(user_temp_session,bot_id)
+      chat_session = repository.get_customer_chat_session(user_temp_session)
+      return {"message": "Save customer chat successful", "user_session": user_temp_session, "chat_session":chat_session['id']}
+
+    except Exception as e:
+      return {"message": f"An error occurred while saving customer chat: {e}"}
+
+  def get_chat_logs(self,chat_session:str):
+    try:
+      chat_logs = repository.get_chat_logs(chat_session)
+      return {"message": "Success getting chat logs", "chat_logs": chat_logs}
+    except Exception as e:
+      return {"message": f"An error occured while getting chat logs: {e}"}
+
+conversation_service = ConversationService(repository)
\ No newline at end of file
diff --git a/src/etl/data_transformation_service.py b/src/etl/data_transformation_service.py
new file mode 100644
index 0000000..d2c011d
--- /dev/null
+++ b/src/etl/data_transformation_service.py
@@ -0,0 +1,84 @@
+import pandas as pd
+from uuid import uuid4
+
+from src.gcp.storage import StorageClientFactory
+from src.etl.repository import repository
+
+# import json
+
+BUCKET_NAME_TMP = 'knowledge-base-tmp'
+BUCKET_NAME_SRC = 'knowledge-base-src'
+
+
+# Factory Method to create pd.read_csv() objects
+class CsvReaderFactory:
+    @staticmethod
+    def read_csv(uri, **kwargs):
+        return pd.read_csv(uri, **kwargs)
+
+def get_user_id(filename):
+    print(f"DataTransformation->get_user_id func->Get user id from filename")
+    filename_uid = filename.split('.')[1]
+    uid = f"{filename_uid.split('-')[1]}-{filename_uid.split('-')[2]}-{filename_uid.split('-')[3]}-{filename_uid.split('-')[4]}-{filename_uid.split('-')[5]}"
+    print(f"DataTransformation->Get user id func->User id: {uid}")
+    return uid
+
+def get_bot_id(filename):
+    print(f"DataTransformation->get_bot_id func->get bot id from filename")
+    filename_uid = filename.split('.')[1]
+    wid = f"{filename_uid.split('-')[6]}-{filename_uid.split('-')[7]}-{filename_uid.split('-')[8]}-{filename_uid.split('-')[9]}-{filename_uid.split('-')[10]}"
+    print(f"DataTransformation->get_bot_id func->bot id: {wid}")
+    return wid
+
+def flatten_data(filename):
+    print(f"DataTransformation->flatten_data func->Start flatten data")
+    uri = f"gs://{BUCKET_NAME_TMP}/{filename}"
+    print(f"DataTransformation->flatten_data func->Read created tmp csv: {uri}")
+
+    # Read CSV using pd.read_csv() with the factory method
+    df = CsvReaderFactory.read_csv(uri, on_bad_lines='skip')
+
+    df.astype(str).agg(', '.join, axis=1)
+    df.dropna(how='all')
+    records = [
+        {
+            'id': str(uuid4()),
+            'filename': filename,
+            'data': df.to_string()
+        }
+    ]
+    dframe = pd.DataFrame(
+        records,
+        columns=[
+            "id",
+            "filename",
+            "data"
+        ]
+    )
+    print(f"DataTransformation->flatten_data func->Dataframe from tmp csv: {dframe}")
+    return dframe
+
+def delete_uploaded_file(filename):
+    print(f"DataTransformation->delete_uploaded_file func->Delete original file: {filename}")
+    client = StorageClientFactory.create_client()
+    bucket = client.get_bucket(BUCKET_NAME_SRC)
+    blob = bucket.blob(filename)
+    blob.delete()
+    return {"message": "Deleted uploaded file"}
+
+# def transform_data(data, new_filename, orig_filename):
+#     print("DataTransformation->Start transform data")
+
+#     client = StorageClientFactory.create_client()
+#     bucket = client.get_bucket(BUCKET_NAME)
+#     blob = bucket.blob(new_filename)
+#     blob.upload_from_string(data)
+#     print(f"DataTransformation->Created csv from upload file: {new_filename}")
+
+#     dframe = flatten_data(new_filename)
+
+#     blob.delete()
+#     delete_uploaded_file(orig_filename)
+#     repository.load_data(dframe, get_user_id(new_filename), new_filename)
+
+storage_client = StorageClientFactory.create_client()
\ No newline at end of file
diff --git a/src/etl/document_loaders/csv_json_loader.py b/src/etl/document_loaders/csv_json_loader.py
new file mode 100644
index 0000000..5152f69
--- /dev/null
+++ b/src/etl/document_loaders/csv_json_loader.py
@@ -0,0 +1,23 @@
+
+from src.etl.repository import repository
+from src.etl.document_loaders.data_loader_strategy import DataLoaderStrategy
+from src.etl.data_transformation_service import storage_client, BUCKET_NAME_TMP, flatten_data, delete_uploaded_file, get_user_id, get_bot_id
+
+
+class CsvDataLoader(DataLoaderStrategy):
+  def load_data(data, new_filename, orig_filename, file_type):
+    print("CSVJsonLoader->load data func->Read file")
+
+    bucket = storage_client.get_bucket(BUCKET_NAME_TMP)
+    blob = bucket.blob(new_filename)
+    blob.upload_from_string(data)
+    blob.make_public()
+    file_url = blob.public_url
+    print(f"CSVJsonLoader->load data func->Created tmp csv from upload file: {new_filename}")
+
+    dframe = flatten_data(new_filename)
+
+    # blob.delete()
+    file_type = 'json' if file_type == 'application/json' else 'csv'
+    repository.load_data(dframe, get_user_id(new_filename), new_filename, file_type, get_bot_id(new_filename), file_url)
+    delete_uploaded_file(orig_filename)
diff --git a/src/etl/document_loaders/data_loader_strategy.py b/src/etl/document_loaders/data_loader_strategy.py
new file mode 100644
index 0000000..0d959c2
--- /dev/null
+++ b/src/etl/document_loaders/data_loader_strategy.py
@@ -0,0 +1,6 @@
+from abc import ABC, abstractmethod
+
+class DataLoaderStrategy(ABC):
+    @abstractmethod
+    def load_data(self, data, new_filename, orig_filename, type, bot_id):
+        pass
diff --git a/src/etl/document_loaders/pdf_loader.py b/src/etl/document_loaders/pdf_loader.py
new file mode 100644
index 0000000..5c95bc9
--- /dev/null
+++ b/src/etl/document_loaders/pdf_loader.py
@@ -0,0 +1,50 @@
+import pandas as pd
+import gcsfs
+from uuid import uuid4
+from PyPDF2 import PdfReader
+
+from src.config import GCP_PROJECT_ID,GCP_UPLOAD_BUCKET
+from src.etl.repository import repository
+from src.etl.document_loaders.data_loader_strategy import DataLoaderStrategy
+from src.etl.data_transformation_service import delete_uploaded_file, get_user_id, get_bot_id
+
+class PdfDataLoader(DataLoaderStrategy):
+  def load_data(new_filename, orig_filename):
+    gcs_file_system = gcsfs.GCSFileSystem(project=GCP_PROJECT_ID)
+    gcs_pdf_path = f"gs://{GCP_UPLOAD_BUCKET}/{orig_filename}"
+    print(f"PdfDataLoader->load data func-> pdf path to read: {gcs_pdf_path}")
+    url = f"https://storage.googleapis.com/{GCP_UPLOAD_BUCKET}/{new_filename}"
+    f_object = gcs_file_system.open(gcs_pdf_path, "rb")
+
+    # creating a pdf reader object
+    reader = PdfReader(f_object)
+    page_full_content = []
+    # getting a specific page from the pdf file
+    number_of_pages = len(reader.pages)
+    print(f"PdfDataLoader->load data func-> number of pdf page: {number_of_pages}")
+
+    for page_number in range(number_of_pages):
+      page = reader.pages[page_number]
+      page_content = page.extract_text()
+      page_full_content.append(page_content)
+
+    records = [
+        {
+          'id': str(uuid4()),
+          'filename': orig_filename,
+          'data': ''.join(page_full_content)
+        }
+    ]
+    f_object.close()
+
+    dframe = pd.DataFrame(
+        records,
+        columns=[
+          "id",
+          "filename",
+          "data"
+        ]
+    )
+
+    repository.load_data(dframe, get_user_id(new_filename), new_filename, "pdf", get_bot_id(new_filename), url)
+    # delete_uploaded_file(orig_filename)
diff --git a/src/etl/exceptions.py b/src/etl/exceptions.py
new file mode 100644
index 0000000..1fac44d
--- /dev/null
+++ b/src/etl/exceptions.py
@@ -0,0 +1,8 @@
+from fastapi import HTTPException
+
+def is_cloud_event_data_valid(cloud_event_data):
+  # if not is_cloud_event_data_valid:
+  #   print("Exception: user not found")
+  #   raise HTTPException(status_code=404, detail="User not found")
+  # else:
+    pass
\ No newline at end of file
diff --git a/src/etl/repository.py b/src/etl/repository.py
new file mode 100644
index 0000000..ae9c87f
--- /dev/null
+++ b/src/etl/repository.py
@@ -0,0 +1,114 @@
+from uuid import uuid4
+from abc import ABC, abstractmethod
+from google.cloud import bigquery
+
+from src.config import TBL_KWNBASE_CON, TBL_KWNBASE_SRC
+from src.gcp.bigquery import executor, client
+
+# Define the interface (abstract base class) for the UI_SettingsRepository
+class ETLRepositoryInterface(ABC):
+  @abstractmethod
+  def insert_user_knowledge_base(self,id,user_id, filename, bot_id, file_type):
+    pass
+
+  @abstractmethod
+  def load_data(self, dframe, user_id,new_filename, file_type, bot_id, url ):
+    pass
+
+# Strategy interface for data loading
+class DataLoaderStrategy:
+    def load_data(self, dframe, filename, file_type):
+      raise NotImplementedError
+
+# Concrete strategy for loading data from a DataFrame
+class DataFrameLoader(DataLoaderStrategy):
+  def load_data(self, dframe, filename, file_type):
+    print(f"ETL Repository->DataFrameLoader dataframe: {dframe}")
+    table_id = TBL_KWNBASE_CON
+    job_config = bigquery.LoadJobConfig(
+      schema=[
+        bigquery.SchemaField('id', "STRING"),
+        bigquery.SchemaField('knowledgebase_source_id', "STRING"),
+        bigquery.SchemaField('data', "STRING"),
+        bigquery.SchemaField('filename', "STRING"),
+      ],
+      write_disposition=bigquery.WriteDisposition.WRITE_APPEND,
+    )
+    try:
+      # if file_type == "pdf":
+        # print(f"ETL Repository->Load pdf data to content table")
+      load_job = client.load_table_from_dataframe(dframe, table_id, job_config=job_config)
+      # else:
+        # print(f"ETL Repository->Load csv or json data to content table")
+        # uri = f"gs://knowledge-base-tmp/{filename}"
+        # load_job = client.load_table_from_uri(uri, table_id, job_config=job_config)
+      load_job.result()
+      destination_table = client.get_table(table_id)
+      print("ETL Repository->Loaded {} rows.".format(destination_table.num_rows))
+    except Exception as e:
+      print(f"ETL Repository->An error occurred: {e}")
+
+# Context class for DataLoaderStrategy
+class DataLoaderContext:
+    def __init__(self, strategy):
+        self._strategy = strategy
+    def set_strategy(self, strategy):
+        self._strategy = strategy
+    def load_data(self, dframe, filename, file_type):
+        self._strategy.load_data(dframe, filename, file_type)
+
+
+# Concrete implementation of the UI_SettingsRepository using BigQuery
+class ETLRepositoryBigQuery(ETLRepositoryInterface):
+  def __init__(self, executor):
+    self._executor = executor
+
+  # Function to insert data into BigQuery
+  def insert_user_knowledge_base(self,id,user_id, filename, bot_id, file_type, is_deleted, url):
+    print("ETL Repository->insert_user_knowledge_base func->Insert knowledgde base source")
+    try:
+      # Reference to the dataset and table
+      table_id = TBL_KWNBASE_SRC
+      data_to_insert = [{
+        "id": id,
+        "user_id": user_id,
+        "widget_id": bot_id,
+        "filename": filename,
+        "type": file_type,
+        "is_deleted": is_deleted,
+        "url": url
+      }]
+      print(f"ETL Repository->insert_user_knowledge_base func->Data to load: {data_to_insert}")
+      # Insert the data into the table
+      errors = client.insert_rows_json(table_id, data_to_insert)
+
+      if not errors:
+        print("ETL Repository->insert_user_knowledge_base func->Data inserted successfully.")
+        return id
+      else:
+        print("ETL Repository->insert_user_knowledge_base func->Errors occurred while inserting data:")
+        for error in errors:
+          print(error)
+        return {"message": f"ETL Repository->insert_user_knowledge_base func->error: {errors}"}
+    except Exception as e:
+      print(f"ETL Repository->An error occurred: {e}")
+      return {"message": f"ETL Repository->insert_user_knowledge_base func->An error occurred: {e}"}
+
+  def load_data(self, dframe, user_id,new_filename, file_type, bot_id, url ):
+    print(f"ETL Repository->BQ class dataframe:{dframe}")
+    # Use the DataLoaderContext with DataFrameLoader strategy
+    try:
+      data_loader = DataLoaderContext(DataFrameLoader())
+      print("ETL Repository->Load data to knowledgebase content table")
+      id = str(uuid4())
+      src_id = self.insert_user_knowledge_base(id, user_id, new_filename, bot_id, file_type, False, url)
+      dframe["id"] = str(uuid4())
+      dframe["knowledgebase_source_id"] = src_id
+      data_loader.load_data(dframe, new_filename, file_type)
+      print(f"ETL repository-> load data func-> Done loading data")
+      return {"message": "ETL process done"}
+    except Exception as e:
+      print(f"DataToBQ->An error occurred: {e}")
+      return {"message": "Error on loading data into db:{e}"}
+
+repository = ETLRepositoryBigQuery(executor)
\ No newline at end of file
diff --git a/src/etl/router.py b/src/etl/router.py
new file mode 100644
index 0000000..d5ccf2c
--- /dev/null
+++ b/src/etl/router.py
@@ -0,0 +1,12 @@
+from fastapi import APIRouter, Body, Depends
+
+router = APIRouter()
+
+from src.etl.service import ETLService
+from src.login.service import manager
+
+etl_service = ETLService()
+
+@router.post("/etl/data-extraction/", tags=["etl"], summary="Process data extraction")
+async def data_processing(cloud_event_data: dict = Body(...)):
+  return await etl_service.process_data(cloud_event_data)
diff --git a/src/etl/service.py b/src/etl/service.py
new file mode 100644
index 0000000..6a676a7
--- /dev/null
+++ b/src/etl/service.py
@@ -0,0 +1,43 @@
+
+from google.cloud import storage
+from src.gcp.storage import StorageClientFactory
+
+from src.etl.document_loaders.csv_json_loader import CsvDataLoader
+from src.etl.document_loaders.pdf_loader import PdfDataLoader
+from src.etl.repository import repository
+
+class ETLService:
+  # Triggered by a change in a storage bucket
+  async def process_data(self,cloud_event):
+    print("ETLService-> Start data processing")
+    data = cloud_event
+    print(f"ETLService->Cloud Event Data: {data}")
+
+    bucket = data["bucket"]
+    orig_filename = data["name"]
+    time_created = data["timeCreated"]
+    new_filename = f"{orig_filename}-{time_created}.csv"
+    contentType = data['contentType']
+
+    if contentType == "application/pdf":
+        print(f"ETLService->Start pdf loader")
+        PdfDataLoader.load_data(new_filename, orig_filename)
+    else:
+      print(f"ETLService->Start csvjson loader")
+      try:
+        client = storage.Client()
+        bucket = client.get_bucket(bucket)
+        file_blob = storage.Blob(orig_filename, bucket)
+      except BaseException as error:
+        print(f'ETLService->CSVJson loader storage  error: {error}')
+
+      print(f"ETLService->File blob: {file_blob}")
+      download_data = file_blob.download_as_string().decode()
+      print("ETLService->download_data : ", download_data)
+
+      try:
+        CsvDataLoader.load_data(download_data,new_filename, orig_filename, contentType)
+      except BaseException as error:
+        print('ETLService->An exception occurred: {}'.format(error))
+
+    return {"message":"Done data process"}
\ No newline at end of file
diff --git a/src/files/exceptions.py b/src/files/exceptions.py
new file mode 100644
index 0000000..888de40
--- /dev/null
+++ b/src/files/exceptions.py
@@ -0,0 +1,9 @@
+from fastapi import HTTPException
+
+def is_file_upload_exists(file):
+  if not file.filename:
+    print("Exception: No file uploaded")
+    raise HTTPException(status_code=400, detail="No file uploaded")
+  else:
+    pass
+
diff --git a/src/files/repository.py b/src/files/repository.py
new file mode 100644
index 0000000..5239774
--- /dev/null
+++ b/src/files/repository.py
@@ -0,0 +1,22 @@
+from src.config import VW_USER_LIST_LATEST,VW_USER_FILES_LATEST
+from src.gcp.bigquery import executor
+
+class FileRepository:
+  def __init__(self, executor):
+    self._executor = executor
+
+  def get_user_files(self, user_id):
+    query = f"SELECT * FROM `{VW_USER_FILES_LATEST}` WHERE user_id = '{user_id}'"
+    return self._executor.execute_query(query)
+
+  def get_bot_files(self, bot_id):
+    query = f"SELECT * FROM `{VW_USER_FILES_LATEST}` WHERE widget_id = '{bot_id}'"
+    return self._executor.execute_query(query)
+
+  def get_specific_bot_file(self, id):
+    query = f"SELECT * FROM `{VW_USER_FILES_LATEST}` WHERE id = '{id}'"
+    return self._executor.execute_query(query)
+
+
+
+repository = FileRepository(executor)
\ No newline at end of file
diff --git a/src/files/router.py b/src/files/router.py
new file mode 100644
index 0000000..b083e7d
--- /dev/null
+++ b/src/files/router.py
@@ -0,0 +1,80 @@
+import os
+from typing import Annotated
+from fastapi import APIRouter,File, UploadFile, HTTPException, Form, Depends,Body
+from fastapi.responses import StreamingResponse
+from urllib.parse import unquote,urlparse
+
+from src.gcp.storage import StorageClientFactory
+
+from src.files.service import upload_file_to_gcs, delete_bot_file
+from src.files.repository import repository
+from src.files.exceptions import is_file_upload_exists
+from src.bot.exceptions import has_bot_parameter
+from src.users.exceptions import is_user_valid
+from src.login.service import manager
+
+router = APIRouter()
+
+
+@router.get("/user-files/{user_id}", tags=["files"], summary="Get all files uploaded by user id")
+async def user_files(user_id: str, user=Depends(manager)):
+  """
+    This is my description of the API endpoint
+  """
+  is_user_valid(user_id)
+  return repository.get_user_files(user_id)
+
+
+@router.get("/files/bot/{bot_id}", tags=["files"], summary="Get all files uploaded by bot id")
+async def bot_files(bot_id: str, user=Depends(manager)):
+  """
+    This is my description of the API endpoint
+  """
+  has_bot_parameter(bot_id)
+  return repository.get_bot_files(bot_id)
+
+@router.post("/upload-file/", tags=["files"], summary="Upload file")
+async def upload_file(user_id: Annotated[str, Form()], bot_id: Annotated[str,Form()],fileList: list[UploadFile] = File(...),user=Depends(manager)):
+  """
+    This is my description of the API endpoint
+  """
+  has_bot_parameter(bot_id)
+  for file in fileList:
+    is_file_upload_exists(file)
+
+  try:
+    for file in fileList:
+      response = await upload_file_to_gcs(user_id,bot_id,file)
+  except Exception as e:
+    raise HTTPException(status_code=500, detail=str(e))
+  return response
+
+@router.post("/files/bot/download/", tags=["files"], summary="Download bot file")
+async def index(url: Annotated[str, Form()], user=Depends(manager)):
+  """
+    This is my description of the API endpoint
+  """
+  file_type = url.split("/")[0]
+  if file_type == "csv" or file_type== "json":
+    bucket_src = os.environ.get("GCP_BUCKET_TMP")
+  else:
+    bucket_src = os.environ.get("GCP_UPLOAD_BUCKET")
+    url = url.rsplit('.', 1)[0].rsplit('-', 3)[0]
+
+  storage_client = StorageClientFactory.create_client()
+  bucket = storage_client.bucket(bucket_src)
+  # Get the blob
+  blob = bucket.blob(unquote(url))
+  content_type = "application/octet-stream"  # Change to the appropriate content type
+
+  # Create a StreamingResponse to send the file
+  return StreamingResponse(iter([blob.download_as_bytes()]), media_type=content_type)
+
+@router.get("/files/bot/delete/{id}", tags=["files"], summary="Delete bot file")
+async def delete_files(id:str,user=Depends(manager)):
+  try:
+    response = await delete_bot_file(id)
+  except Exception as e:
+    raise HTTPException(status_code=500, detail=str(e))
+  return response
+
diff --git a/src/files/service.py b/src/files/service.py
new file mode 100644
index 0000000..0be0fb3
--- /dev/null
+++ b/src/files/service.py
@@ -0,0 +1,42 @@
+import os
+
+from fastapi import HTTPException
+
+from src.config import GCP_UPLOAD_BUCKET
+from src.gcp.storage import StorageClientFactory
+from src.files.repository import repository
+from src.etl.repository import repository as ETLRepository
+
+async def upload_file_to_gcs(user_id, bot_id,file):
+  print("Upload file to GCS")
+  storage_client = StorageClientFactory.create_client()
+  try:
+    split_tup = os.path.splitext(file.filename)
+
+    # Generate a unique name for the file in the bucket
+    blob_name = f"{file.filename}"
+
+    # Upload the file to the bucket
+    bucket = storage_client.bucket(GCP_UPLOAD_BUCKET)
+    blob = bucket.blob(f"{split_tup[1].replace('.','')}/{blob_name}-{user_id}-{bot_id}")
+    blob.upload_from_file(file.file, content_type=file.content_type)
+
+    # Create a publicly accessible URL for the uploaded file
+    blob.make_public()
+    file_url = blob.public_url
+    return {"message": f"File upload successfully"}
+  except Exception as e:
+    print(f"Error uploading file to gcs:{e}")
+    raise HTTPException(status_code=500, detail=str(e))
+
+
+async def delete_bot_file(id):
+  bot_files = repository.get_specific_bot_file(id)
+  try:
+    insert_data = ETLRepository.insert_user_knowledge_base(id,bot_files["user_id"], bot_files["filename"],bot_files["widget_id"],bot_files["type"], True, bot_files["url"])
+    if not insert_data:
+      print("Delete Bot file -> Data inserted successfully.")
+      return id
+  except Exception as e:
+    print(f"Delete bot file service->An error occurred: {e}")
+    return {"message": f"Delete bot file service->delete_bot_file func->An error occurred: {e}"}
\ No newline at end of file
diff --git a/src/gcp/bigquery.py b/src/gcp/bigquery.py
new file mode 100644
index 0000000..0aaf94d
--- /dev/null
+++ b/src/gcp/bigquery.py
@@ -0,0 +1,30 @@
+from google.cloud import bigquery
+
+class BigQueryClientSingleton:
+    _instance = None
+
+    @staticmethod
+    def get_instance():
+        if BigQueryClientSingleton._instance is None:
+            BigQueryClientSingleton._instance = bigquery.Client()
+        return BigQueryClientSingleton._instance
+
+
+class BigQueryQueryExecutor:
+    def __init__(self, client):
+        self._client = client
+
+    def execute_query(self, query):
+        result =  self._client.query(query)
+
+        result_list = [dict(row) for row in result]
+        # print(result_list)
+        if len(result_list) == 1:
+            return result_list[0]
+        else:
+            return result_list
+
+
+
+client = BigQueryClientSingleton.get_instance()
+executor = BigQueryQueryExecutor(client)
diff --git a/src/gcp/storage.py b/src/gcp/storage.py
new file mode 100644
index 0000000..82d894a
--- /dev/null
+++ b/src/gcp/storage.py
@@ -0,0 +1,6 @@
+from google.cloud import storage
+
+# Factory Method to create storage.Client() objects
+class StorageClientFactory:
+    def create_client():
+        return storage.Client()
\ No newline at end of file
diff --git a/src/helpers/token_helper.py b/src/helpers/token_helper.py
new file mode 100644
index 0000000..294a47f
--- /dev/null
+++ b/src/helpers/token_helper.py
@@ -0,0 +1,18 @@
+import tiktoken
+from src.config import ENCODING_FOR_MODEL, ENCODING
+
+tiktoken.encoding_for_model(ENCODING_FOR_MODEL)
+tokenizer = tiktoken.get_encoding(ENCODING)
+
+def tiktoken_len(text: str) -> int:
+    tokens = tokenizer.encode(
+        text,
+        disallowed_special=()
+    )
+    return len(tokens)
+
+def num_tokens_from_string(string: str, encoding_name: str) -> int:
+    """Returns the number of tokens in a text string."""
+    encoding = tiktoken.get_encoding(encoding_name)
+    num_tokens = len(encoding.encode(string))
+    return num_tokens
\ No newline at end of file
diff --git a/src/login/repository.py b/src/login/repository.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/login/router.py b/src/login/router.py
new file mode 100644
index 0000000..3ea5923
--- /dev/null
+++ b/src/login/router.py
@@ -0,0 +1,12 @@
+from fastapi import APIRouter, Depends
+from fastapi.security import OAuth2PasswordRequestForm
+
+from src.login.service import LoginService
+
+router = APIRouter()
+
+login_service = LoginService()
+
+@router.post("/login", tags=["login"], summary="Logged in user")
+async def post_login(data: OAuth2PasswordRequestForm = Depends()):
+  return await login_service.login(data)
diff --git a/src/login/service.py b/src/login/service.py
new file mode 100644
index 0000000..43a6f2a
--- /dev/null
+++ b/src/login/service.py
@@ -0,0 +1,38 @@
+import os
+from datetime import timedelta
+from dotenv import load_dotenv
+from fastapi_login import LoginManager
+from fastapi import Depends
+from fastapi.security import OAuth2PasswordRequestForm
+from fastapi_login.exceptions import InvalidCredentialsException
+
+from src.users.service import user_service
+
+load_dotenv()
+
+manager = LoginManager(
+  os.environ.get("LOGIN_SECRET_KEY"), '/login',
+  default_expiry=timedelta(hours=1)
+)
+
+class LoginService:
+  async def login(self,data: OAuth2PasswordRequestForm = Depends()):
+
+    email = data.username
+    password = data.password
+
+    user = await user_service.get_user_details(email)
+    if not user:
+      # you can return any response or error of your choice
+      raise InvalidCredentialsException
+    elif password != user['password']:
+      raise InvalidCredentialsException
+    access_token = manager.create_access_token(
+        data={'sub': email, 'user': user['id']}
+    )
+
+    return {'status': 'Success','access_token': access_token}
+
+  @manager.user_loader()
+  async def query_user(email: str):
+    return await user_service.get_user_details(email)
diff --git a/src/users/__init__.py b/src/users/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/src/users/exceptions.py b/src/users/exceptions.py
new file mode 100644
index 0000000..165820c
--- /dev/null
+++ b/src/users/exceptions.py
@@ -0,0 +1,51 @@
+import re
+from uuid import UUID
+from fastapi import HTTPException
+
+from src.users.repository import repository
+
+def is_user_valid(user: str):
+  try:
+    UUID(user, version=4)
+    users = repository.get_user_details(user)
+  except ValueError:
+    if re.match(r"[^@]+@[^@]+\.[^@]+", user):
+      users = repository.get_user_details_by_email(user)
+    else:
+      users = repository.get_user_details_by_name(user)
+
+  if not users:
+    print("Exception: user not found")
+    raise HTTPException(status_code=400, detail="User not found")
+  else:
+    pass
+
+def is_user_id_valid_uuid(user: str):
+  try:
+    UUID(user, version=4)
+    pass
+  except ValueError:
+    raise HTTPException(status_code=400, detail="User not found")
+
+def has_user_bot(bot_settings):
+  if len(bot_settings) == 0:
+    raise HTTPException(status_code=400, detail="No bot available")
+  else:
+    pass
+
+def is_password_same(user_id:str, password:str):
+  current_password = repository.get_user_password(user_id)
+  if password == current_password["password"]:
+    raise HTTPException(status_code=400, detail="Password should not be the same")
+  else:
+    pass
+
+def is_email_exist_to_other_user(user_id:str, email:str):
+  user_details = repository.get_user_details_by_email(email)
+  if user_details:
+    if user_details["id"] != user_id:
+      raise HTTPException(status_code=400, detail="Email is already exists")
+    else:
+      pass
+  else:
+    pass
\ No newline at end of file
diff --git a/src/users/repository.py b/src/users/repository.py
new file mode 100644
index 0000000..4989f4d
--- /dev/null
+++ b/src/users/repository.py
@@ -0,0 +1,96 @@
+from fastapi import HTTPException
+from typing import List
+
+from src.config import VW_USER_LIST_LATEST,TBL_USERS
+from src.gcp.bigquery import executor, client
+from src.users.schemas import UserResponseModel, UserPasswordResponseModel
+
+class UserRepository:
+  def __init__(self, executor):
+    self._executor = executor
+
+  def _get_user_details_query(self, column, value):
+        return f"SELECT * FROM `{VW_USER_LIST_LATEST}` u WHERE {column} = '{value}'"
+
+  def get_users(self) -> list[UserResponseModel]:
+    query = f"SELECT * FROM `{VW_USER_LIST_LATEST}`"
+    try:
+      result = self._executor.execute_query(query)
+      return result
+    except BaseException as e:
+      msg = f"UserRepository->get_users func-> Error fetching users:{e}"
+      print(msg)
+      raise HTTPException(status_code=400, detail=msg)
+
+  def get_user_details(self, user_id) -> UserResponseModel:
+    query = self._get_user_details_query('id', user_id)
+    try:
+      result = self._executor.execute_query(query)
+      return result
+    except BaseException as e:
+      msg = f"UserRepository->get_user_details func-> Error fetching user details:{e}"
+      print(msg)
+      raise HTTPException(status_code=400, detail=msg)
+
+  def get_user_details_by_name(self, username) -> UserResponseModel:
+    query = self._get_user_details_query('username', username)
+    try:
+      result = self._executor.execute_query(query)
+      return result
+    except BaseException as e:
+      msg = f"UserRepository->get_user_details_by_name func-> Error fetching user details:{e}"
+      print(msg)
+      raise HTTPException(status_code=400, detail=msg)
+
+  def get_user_details_by_email(self, email) -> UserResponseModel:
+    query = self._get_user_details_query('email', email)
+    try:
+      result = self._executor.execute_query(query)
+      return result
+    except BaseException as e:
+      msg = f"UserRepository->get_user_details_by_email func-> Error fetching user details:{e}"
+      print(msg)
+      raise HTTPException(status_code=400, detail=msg)
+
+  def get_user_password(self, user_id) -> UserPasswordResponseModel:
+    query = self._get_user_details_query('id', user_id)
+    try:
+      result = self._executor.execute_query(query)
+      return result
+    except BaseException as e:
+      msg = f"UserRepository->get_user_details func-> Error fetching user details:{e}"
+      print(msg)
+      raise HTTPException(status_code=400, detail=msg)
+
+  def save_user_info(self, user_info):
+    row_to_insert = {
+      "id": user_info.id,
+      # "username": user_info.username,
+      "firstname": user_info.firstname,
+      "lastname": user_info.lastname,
+      "email": user_info.email,
+      "password": user_info.password
+    }
+
+    errors = client.insert_rows_json(TBL_USERS, [row_to_insert])
+
+    if not errors:
+      msg = f"User info for {user_info.id} saved successfully."
+      print(msg)
+      return {"message":msg}
+    else:
+      msg = f"Errors occurred while saving user info for user id: {user_info.id}: {errors}"
+      print(msg)
+      return {"message":msg}
+
+repository = UserRepository(executor)
+
+
+def get_users()-> List[UserResponseModel]:
+  return repository.get_users()
+
+def get_user_details(user_id: str)-> UserResponseModel:
+  return repository.get_user_details(user_id)
+
+def get_user_details_by_name(username: str)-> UserResponseModel:
+  return repository.get_user_details_by_name(username)
\ No newline at end of file
diff --git a/src/users/router.py b/src/users/router.py
new file mode 100644
index 0000000..43d42ab
--- /dev/null
+++ b/src/users/router.py
@@ -0,0 +1,30 @@
+from fastapi import APIRouter, Depends, Body
+
+from src.users.service import user_service
+from src.users.schemas import UserResponseModel, UserUpdateModel
+from src.login.service import manager
+
+router = APIRouter()
+
+@router.get("/users/", tags=["users"], summary="Get all users")
+async def all_users(user=Depends(manager)) -> list[UserResponseModel]:
+  """
+    This is my description of the API endpoint
+  """
+  return await user_service.get_users()
+
+@router.get("/user-details/{user}", tags=["users"],summary="Get user details based on user id or username")
+async def user_details(user: str, credentials=Depends(manager)) -> UserResponseModel:
+  """
+    This is my description of the API endpoint
+  """
+
+  return await user_service.get_user_details(user)
+
+@router.put("/user-details/", tags=["users"],summary="Update user information")
+async def user_update(user_info: UserUpdateModel = Body(...),credentials=Depends(manager)):
+  """
+    This is my description of the API endpoint
+  """
+
+  return await user_service.update_user(user_info)
\ No newline at end of file
diff --git a/src/users/schemas.py b/src/users/schemas.py
new file mode 100644
index 0000000..ccc15c6
--- /dev/null
+++ b/src/users/schemas.py
@@ -0,0 +1,35 @@
+from pydantic import BaseModel, Json, EmailStr
+from typing import Dict, Union
+# from datetime import datetime
+
+# class UserCreateDTO(BaseModel):
+#     user_id: str
+#     title: str
+#     chat_styles: Dict
+#     chat_properties: Dict
+#     header_chat_styles: Dict
+#     auth_form_properties: Dict
+#     initial_message: Union[str, None]
+#     message_suggestion: Union[Dict, None]
+
+class UserResponseModel(BaseModel):
+    id: str
+    # username: str
+    firstname: Union[str, None]
+    lastname: Union[str, None]
+    email: Union[EmailStr, None]
+    contact_no: Union[int, None]
+    # updated_at: datetime
+    # created_at: datetime
+
+class UserPasswordResponseModel(BaseModel):
+    id: str
+    password: str
+
+class UserUpdateModel(BaseModel):
+    id: str
+    # username: str
+    firstname: Union[str, None]
+    lastname: Union[str, None]
+    email: Union[EmailStr, None]
+    password: Union[str, None]
diff --git a/src/users/service.py b/src/users/service.py
new file mode 100644
index 0000000..d33cb6c
--- /dev/null
+++ b/src/users/service.py
@@ -0,0 +1,50 @@
+import re
+from uuid import UUID
+from typing import List
+
+from src.users.repository import repository
+from src.users.exceptions import is_user_valid, is_password_same, is_email_exist_to_other_user
+from src.users.schemas import UserUpdateModel, UserResponseModel
+
+
+class UserService:
+  def __init__(self, repository: repository):
+    self.repository = repository
+
+  async def get_users(self) -> List[UserResponseModel]:
+    return self.repository.get_users()
+
+  async def get_user_details(self, user: str) -> UserResponseModel:
+    is_user_valid(user)
+    try:
+      UUID(user, version=4)
+      user_details = self.repository.get_user_details(user)
+    except ValueError:
+      if re.match(r"[^@]+@[^@]+\.[^@]+", user):
+        user_details = self.repository.get_user_details_by_email(user)
+      else:
+        user_details = self.repository.get_user_details_by_name(user)
+    return user_details
+
+  async def update_user(self, user_info: UserUpdateModel) -> dict[str, str]:
+    is_user_valid(user_info.id)
+    is_email_exist_to_other_user(user_info.id, user_info.email)
+    current_user_info = self.repository.get_user_details(user_info.id)
+    if user_info.firstname is None:
+      user_info.firstname = current_user_info["firstname"]
+    if user_info.lastname is None:
+      user_info.lastname = current_user_info["lastname"]
+    if user_info.email is None:
+      user_info.email = current_user_info["email"]
+
+    if user_info.password:
+      is_password_same(user_info.id,user_info.password)
+    else:
+      current_password = self.repository.get_user_password(user_info.id)
+      user_info.password = current_password["password"]
+
+    response = self.repository.save_user_info(user_info)
+
+    return {"message": response}
+
+user_service = UserService(repository)
\ No newline at end of file
diff --git a/src/websocket/websocket_manager.py b/src/websocket/websocket_manager.py
new file mode 100644
index 0000000..b8d12e7
--- /dev/null
+++ b/src/websocket/websocket_manager.py
@@ -0,0 +1,19 @@
+from fastapi import WebSocket
+
+class ConnectionManager:
+    def __init__(self):
+        self.active_connections: list[WebSocket] = []
+
+    async def connect(self, websocket: WebSocket):
+        await websocket.accept()
+        self.active_connections.append(websocket)
+
+    def disconnect(self, websocket: WebSocket):
+        self.active_connections.remove(websocket)
+
+    async def send_personal_message(self, message: str, websocket: WebSocket):
+        await websocket.send_text(message)
+
+    async def broadcast(self, message: str):
+        for connection in self.active_connections:
+            await connection.send_text(message)
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..1075f72
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,40 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <link href="https://cdnjs.cloudflare.com/ajax/libs/flowbite/1.7.0/flowbite.min.css" rel="stylesheet" />
+</head>
+<body>
+  <div class="container mx-auto">
+
+<nav class="bg-white border-gray-200 dark:bg-gray-900">
+  <div class="max-w-screen-xl flex flex-wrap items-center justify-between mx-auto p-4">
+    <a href="https://flowbite.com/" class="flex items-center">
+        <!-- <img src="https://flowbite.com/docs/images/logo.svg" class="h-8 mr-3" alt="Flowbite Logo" />
+        <span class="self-center text-2xl font-semibold whitespace-nowrap dark:text-white">Flowbite</span> -->
+    </a>
+    <button data-collapse-toggle="navbar-default" type="button" class="inline-flex items-center p-2 w-10 h-10 justify-center text-sm text-gray-500 rounded-lg md:hidden hover:bg-gray-100 focus:outline-none focus:ring-2 focus:ring-gray-200 dark:text-gray-400 dark:hover:bg-gray-700 dark:focus:ring-gray-600" aria-controls="navbar-default" aria-expanded="false">
+        <span class="sr-only">Open main menu</span>
+        <svg class="w-5 h-5" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 17 14">
+            <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M1 1h15M1 7h15M1 13h15"/>
+        </svg>
+    </button>
+    <div class="hidden w-full md:block md:w-auto" id="navbar-default">
+      <ul class="font-medium flex flex-col p-4 md:p-0 mt-4 border border-gray-100 rounded-lg bg-gray-50 md:flex-row md:space-x-8 md:mt-0 md:border-0 md:bg-white dark:bg-gray-800 md:dark:bg-gray-900 dark:border-gray-700">
+        <li>
+          <a href="#" class="block py-2 pl-3 pr-4 text-white bg-blue-700 rounded md:bg-transparent md:text-blue-700 md:p-0 dark:text-white md:dark:text-blue-500" aria-current="page">Home</a>
+        </li>
+        <li>
+          <a href="#" class="block py-2 pl-3 pr-4 text-gray-900 rounded hover:bg-gray-100 md:hover:bg-transparent md:border-0 md:hover:text-blue-700 md:p-0 dark:text-white md:dark:hover:text-blue-500 dark:hover:bg-gray-700 dark:hover:text-white md:dark:hover:bg-transparent">Knowledge Base</a>
+        </li>
+        </li>
+      </ul>
+    </div>
+  </div>
+</nav>
+
+  </div>
+</body>
+<script src="https://cdn.tailwindcss.com"></script>
+</html>
\ No newline at end of file
diff --git a/templates/knowledge-base.html b/templates/knowledge-base.html
new file mode 100644
index 0000000..edc859a
--- /dev/null
+++ b/templates/knowledge-base.html
@@ -0,0 +1,92 @@
+<!doctype html>
+<html>
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <link href="https://cdnjs.cloudflare.com/ajax/libs/flowbite/1.7.0/flowbite.min.css" rel="stylesheet" />
+</head>
+<body>
+  <div class="container mx-auto">
+    <nav class="bg-white border-gray-200 dark:bg-gray-900">
+      <div class="max-w-screen-xl flex flex-wrap items-center justify-between mx-auto p-4">
+        <a href="https://flowbite.com/" class="flex items-center">
+            <!-- <img src="https://flowbite.com/docs/images/logo.svg" class="h-8 mr-3" alt="Flowbite Logo" />
+            <span class="self-center text-2xl font-semibold whitespace-nowrap dark:text-white">Flowbite</span> -->
+        </a>
+        <button data-collapse-toggle="navbar-default" type="button" class="inline-flex items-center p-2 w-10 h-10 justify-center text-sm text-gray-500 rounded-lg md:hidden hover:bg-gray-100 focus:outline-none focus:ring-2 focus:ring-gray-200 dark:text-gray-400 dark:hover:bg-gray-700 dark:focus:ring-gray-600" aria-controls="navbar-default" aria-expanded="false">
+            <span class="sr-only">Open main menu</span>
+            <svg class="w-5 h-5" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 17 14">
+                <path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M1 1h15M1 7h15M1 13h15"/>
+            </svg>
+        </button>
+        <div class="hidden w-full md:block md:w-auto" id="navbar-default">
+          <ul class="font-medium flex flex-col p-4 md:p-0 mt-4 border border-gray-100 rounded-lg bg-gray-50 md:flex-row md:space-x-8 md:mt-0 md:border-0 md:bg-white dark:bg-gray-800 md:dark:bg-gray-900 dark:border-gray-700">
+            <li>
+              <a href="#" class="block py-2 pl-3 pr-4 text-gray-900 rounded hover:bg-gray-100 md:hover:bg-transparent md:border-0 md:hover:text-blue-700 md:p-0 dark:text-white md:dark:hover:text-blue-500 dark:hover:bg-gray-700 dark:hover:text-white md:dark:hover:bg-transparent" aria-current="page">Home</a>
+            </li>
+            <li>
+              <a href="#" class="block py-2 pl-3 pr-4 text-white bg-blue-700 rounded md:bg-transparent md:text-blue-700 md:p-0 dark:text-white md:dark:text-blue-500">Knowledge Base</a>
+            </li>
+            </li>
+          </ul>
+        </div>
+      </div>
+    </nav>
+
+<div class="relative overflow-x-auto">
+  <table class="w-full text-sm text-left text-gray-500 dark:text-gray-400">
+      <thead class="text-xs text-gray-700 uppercase bg-gray-50 dark:bg-gray-700 dark:text-gray-400">
+          <tr>
+              <th scope="col" class="px-6 py-3">
+                  Filename
+              </th>
+              <th scope="col" class="px-6 py-3">
+                  Users
+              </th>
+              <th scope="col" class="px-6 py-3">
+                  Action
+              </th>
+          </tr>
+      </thead>
+      <tbody>
+          <tr class="bg-white border-b dark:bg-gray-800 dark:border-gray-700">
+              <th scope="row" class="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">
+                  Filename 1
+              </th>
+              <td class="px-6 py-4">
+                  User 1
+              </td>
+              <td class="px-6 py-4">
+                  View data
+              </td>
+          </tr>
+          <tr class="bg-white border-b dark:bg-gray-800 dark:border-gray-700">
+              <th scope="row" class="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">
+                  Filename 2
+              </th>
+              <td class="px-6 py-4">
+                  User 2
+              </td>
+              <td class="px-6 py-4">
+                  View data
+              </td>
+          </tr>
+          <tr class="bg-white dark:bg-gray-800">
+            <th scope="row" class="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">
+              Filename 3
+            </th>
+            <td class="px-6 py-4">
+                User 3
+            </td>
+            <td class="px-6 py-4">
+                View data
+            </td>
+          </tr>
+      </tbody>
+  </table>
+</div>
+
+  </div>
+</body>
+<script src="https://cdn.tailwindcss.com"></script>
+</html>
\ No newline at end of file
diff --git a/templates/upload-tester.html b/templates/upload-tester.html
new file mode 100644
index 0000000..e631119
--- /dev/null
+++ b/templates/upload-tester.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Chat</title>
+    </head>
+    <body>
+      <form action="/upload-file/" enctype="multipart/form-data" method="post">
+      <input name="file" type="file" multiple>
+      <input name="user_id" type="text" value="f3e3194e-9ab7-4c6c-8a9c-167cfe61c8fa" />
+      <input type="submit">
+      </form>
+      </body>
+</html>
\ No newline at end of file
diff --git a/templates/websocket-tester.html b/templates/websocket-tester.html
new file mode 100644
index 0000000..c149705
--- /dev/null
+++ b/templates/websocket-tester.html
@@ -0,0 +1,50 @@
+<!doctype html>
+<html>
+    <head>
+        <title>Chat</title>
+    </head>
+    <body>
+        <h1>WebSocket Chat</h1>
+        <form action="" onsubmit="sendMessage(event)">
+            <label>Message: </label>
+            <input type="text" id="messageText" autocomplete="off" />
+            <label>Language Model</label>
+            <select id="model">
+                <option value="cohere">Cohere</option>
+                <option value="openai">OpenAI</option>
+            </select>
+            <button>Send</button>
+        </form>
+        <ul id="messages"></ul>
+        <script>
+            var scheme =
+                window.location.protocol == "https:" ? "wss://" : "ws://";
+            var webSocketUri =
+                scheme +
+                window.location.hostname +
+                (location.port ? ":" + location.port : "") +
+                "/ws";
+            var websocket = new WebSocket(webSocketUri);
+            websocket.onmessage = function (event) {
+                var messages = document.getElementById("messages");
+                var message = document.createElement("li");
+                var content = document.createTextNode(event.data);
+                message.appendChild(content);
+                messages.appendChild(message);
+            };
+            function sendMessage(event) {
+                var input = document.getElementById("messageText");
+                var modelDropDown = document.querySelector("#model");
+                data = {
+                    // "user_id" : "1",
+                    question: input.value,
+                    model: modelDropDown.value,
+                };
+                console.log(data);
+                websocket.send(JSON.stringify(data));
+                input.value = "";
+                event.preventDefault();
+            }
+        </script>
+    </body>
+</html>