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from fastapi import FastAPI, HTTPException, Depends
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from typing import List, Dict, Optional
from supabase import create_client, Client
import os
from dotenv import load_dotenv
from llm import LLMPipeline
from chat import GeminiChat
load_dotenv()
app = FastAPI()
# CORS middleware
app.add_middleware(
CORSMiddleware,
allow_origins=["*"], # In production, replace with your frontend URL
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
@app.get("/health")
async def health_check():
"""Health check endpoint"""
return {"status": "healthy", "version": "1.0.0"}
# Initialize Supabase client
supabase_url = os.getenv("SUPABASE_URL")
supabase_key = os.getenv("SUPABASE_SERVICE_KEY")
if not supabase_url or not supabase_key:
raise ValueError("Supabase environment variables not set")
supabase: Client = create_client(supabase_url, supabase_key)
# Initialize AI models
llm = LLMPipeline()
gemini = GeminiChat()
class Message(BaseModel):
role: str
content: str
class ChatRequest(BaseModel):
messages: List[Message]
use_gemini: bool = True
temperature: float = 0.7
@app.post("/api/chat")
async def chat(request: ChatRequest):
try:
if request.use_gemini:
# Use Gemini for interactive chat
response = await gemini.chat(
[{"role": m.role, "content": m.content} for m in request.messages],
temperature=request.temperature
)
else:
# Use local LLM for specific tasks
last_message = request.messages[-1].content
response = await llm.generate(last_message)
# Store chat history in Supabase
supabase.table("chat_history").insert({
"messages": [m.dict() for m in request.messages],
"response": response,
"model": "gemini" if request.use_gemini else "local"
}).execute()
return {"response": response}
except Exception as e:
raise HTTPException(status_code=500, detail=str(e))
if __name__ == "__main__":
import uvicorn
uvicorn.run(app, host="0.0.0.0", port=7860)
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