import os import io import json import datetime import pandas as pd from datetime import timedelta from datetime import datetime as dt from fastapi import FastAPI,WebSocket, Depends, HTTPException, status, UploadFile, File from fastapi.responses import FileResponse, JSONResponse from fastapi.requests import Request from fastapi.staticfiles import StaticFiles from fastapi.middleware.cors import CORSMiddleware from fastapi.security import OAuth2PasswordRequestForm from pydantic import ValidationError, BaseModel from bson import ObjectId from .auth import ( get_current_user, create_access_token, verify_password, get_password_hash ) from .db.models import User, Token, Opportunity from .db.database import get_user_by_username, create_user, save_file, create_opportunity, get_opportunities, get_opportunity_count from .websocket import handle_websocket from .llm_models import invoke_general_model, invoke_customer_search app = FastAPI() app.add_middleware( CORSMiddleware, allow_origins=["*"], allow_credentials=True, allow_methods=["*"], allow_headers=["*"], ) # Get the directory of the current file current_dir = os.path.dirname(os.path.realpath(__file__)) # Construct the path to the frontend dist directory frontend_dir = os.path.join(current_dir, "..", "..", "frontend", "dist") @app.get("/") async def serve_react_root() -> FileResponse: return FileResponse(os.path.join(frontend_dir, "index.html")) @app.post("/register", response_model=Token) async def register(user: User) -> Token: if await get_user_by_username(user.username): raise HTTPException( status_code=status.HTTP_400_BAD_REQUEST, detail="Username already registered" ) hashed_password = get_password_hash(user.password) user.password = hashed_password if not await create_user(user): raise HTTPException( status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Could not create user" ) access_token = create_access_token( data={"sub": user.username}, expires_delta=timedelta(minutes=30) ) return Token(access_token=access_token, token_type="bearer") @app.post("/token", response_model=Token) async def login(form_data: OAuth2PasswordRequestForm = Depends()) -> Token: user = await get_user_by_username(form_data.username) if not user or not verify_password(form_data.password, user.password): raise HTTPException( status_code=status.HTTP_401_UNAUTHORIZED, detail="Incorrect username or password", headers={"WWW-Authenticate": "Bearer"}, ) access_token = create_access_token( data={"sub": user.username}, expires_delta=timedelta(minutes=30) ) return Token(access_token=access_token, token_type="bearer") @app.post("/upload") async def upload_file( file: UploadFile = File(...), current_user: User = Depends(get_current_user) ) -> dict: contents = await file.read() # Convert to pandas DataFrame df = pd.read_csv(io.StringIO(contents.decode('utf-8'))) # Convert DataFrame to list of dictionaries records = json.loads(df.to_json(orient='records')) if not await save_file(current_user.username, records, file.filename): raise HTTPException( status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Could not save file" ) return {"message": "File uploaded successfully"} @app.post("/api/save_opportunity") async def save_opportunity(opportunity_data: dict, current_user: User = Depends(get_current_user)) -> dict: try: opportunity_data= { **opportunity_data, "username":current_user.username, "created_at":datetime.datetime.now(datetime.UTC), "updated_at":datetime.datetime.now(datetime.UTC) } print("data********", opportunity_data) opportunity = Opportunity(**opportunity_data) if not await create_opportunity(opportunity): raise HTTPException( status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Could not save opportunity" ) return {"message": "Opportunity saved successfully"} except ValidationError as e: print(f"Validation error: {e}") raise HTTPException( status_code=status.HTTP_400_BAD_REQUEST, detail="Invalid opportunity data" ) @app.get("/api/opportunities") async def retrieve_opportunities( request: Request, page: int = 1, limit: int = 100, current_user: User = Depends(get_current_user) ) -> JSONResponse: """ Retrieve paginated opportunities for the current user """ class JSONEncoder(json.JSONEncoder): def default(self, obj): if isinstance(obj, dt): return obj.isoformat() if isinstance(obj, ObjectId): return str(obj) return super().default(obj) try: skip = (page - 1) * limit # Get paginated records records = await get_opportunities( username=current_user.username, skip=skip, limit=limit ) # Process records with proper serialization all_records = [] for record in records: # Convert MongoDB document to dict and handle ObjectId record_dict = record.dict(by_alias=True) if "_id" in record_dict: record_dict["_id"] = str(record_dict["_id"]) # Process content if it exists if hasattr(record, 'content') and isinstance(record.content, (list, tuple)): all_records.extend(record.content) else: all_records.append(record_dict) # Count total records total_count = await get_opportunity_count(current_user.username) # Create response using Pydantic model response_data = PaginatedResponse( page=page, limit=limit, total_records=total_count, total_pages=-(-total_count // limit), has_more=(skip + limit) < total_count, records=all_records ) # Convert to JSON with custom encoder return JSONResponse( content=json.loads( json.dumps( { "success": True, "data": response_data.model_dump() }, cls=JSONEncoder ) ), status_code=200 ) except Exception as e: print(f"Error retrieving opportunities: {str(e)}") raise HTTPException( status_code=500, detail=f"An error occurred while retrieving opportunities: {str(e)}" ) @app.websocket("/ws") async def websocket_endpoint(websocket: WebSocket) -> None: await handle_websocket(websocket) @app.post("/api/message") async def message(obj: dict, current_user: User = Depends(get_current_user)) -> JSONResponse: """Endpoint to handle general incoming messages from the frontend.""" answer = invoke_general_model(obj["message"]) print("answer**********", answer) return JSONResponse(content={"message": json.loads(answer.model_dump_json() )}) @app.post("/api/customer_insights") async def customer_insights(obj: dict) -> JSONResponse: """Endpoint to launch a customer insight search.""" answer = invoke_customer_search(obj["message"]) return JSONResponse(content={"AIMessage": answer.model_dump_json()}) app.mount("/assets", StaticFiles(directory=os.path.join(frontend_dir, "assets")), name="static") class PaginatedResponse(BaseModel): page: int limit: int total_records: int total_pages: int has_more: bool records: list class Config: json_encoders = { datetime: lambda v: v.isoformat(), ObjectId: lambda v: str(v) } if __name__ == "__main__": from fastapi.testclient import TestClient client = TestClient(app) def test_message_endpoint(): # Test that the message endpoint returns answers to questions. # Update test as this api requires a token for authorization to use response = client.post("/api/message", json={"message": "What is MEDDPICC?"}) print(response.json()) assert response["status_code"] == 200 assert "AIMessage" in response.json() test_message_endpoint()