# app.py
from fastapi import FastAPI
from pydantic import BaseModel
from fastapi.middleware.cors import CORSMiddleware
from bot_instance import gemini_bot, llama_bot  # singleton ErrorBot instance
from typing import List, Optional,Any

import os
from dotenv import load_dotenv
from util import ErrorBot


app = FastAPI(title="ErrorBot API")

# ✅ Allow all origins (adjust in production)
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# ---------------- Request Models ----------------
class MessageItem(BaseModel):
    role: str  # "user" or "bot"
    content: str

class ChatRequest(BaseModel):
    message: str
    history: Optional[List[MessageItem]] = []  # optional conversation history
    lastContext: List[Any] = None

# ---------------- Endpoints ----------------
@app.get("/")
def root():
    return {"status": "ok"}

# @app.post("/chat")
# def chat(request: ChatRequest):
#     """
#     Main chat endpoint:
#     - Accepts a message and optional conversation history
#     - Uses ErrorBot with RAG + LLM
#     """
#     history_list = [
#         {"role": msg.role, "content": msg.content} for msg in request.history
#     ]

#     # Ask bot with history
#     answer = bot.ask(request.message, history=history_list)

#     return {"reply": answer}

load_dotenv()
GOOGLE_API_KEY = os.environ.get("GOOGLE_API_KEY")

GROQ_API_KEY = os.getenv("GROQ_API_KEY")

EMBEDDING_MODEL = "BAAI/bge-base-en-v1.5"

@app.post("/gemini/chat")
def gemini_chat(request: ChatRequest):
    history_list = [{"role": msg.role, "content": msg.content} for msg in request.history]
    gemini_bot = ErrorBot(
        embedding_model_name=EMBEDDING_MODEL,
        llm_model_name="gemini-2.5-flash",
        google_api_key=GOOGLE_API_KEY,
        llm_provider="gemini",
        last_context = request.lastContext
    )
    print("In App.py")
    print(request.lastContext)
    answer, last_context = gemini_bot.ask(request.message, history=history_list)
    print(answer)
    print(last_context)
    return {"reply": answer, "last_context": last_context}

@app.post("/llama/chat")
def llama_chat(request: ChatRequest):
    history_list = [{"role": msg.role, "content": msg.content} for msg in request.history]
    llama_bot = ErrorBot(
        embedding_model_name=EMBEDDING_MODEL,
        llm_model_name="llama-3.3-70b-versatile",
        groq_api_key=GROQ_API_KEY,
        llm_provider="groq",
        last_context = request.lastContext

    )
    answer, last_context = llama_bot.ask(request.message, history=history_list)
    print(answer)
    print(last_context)
    return {"reply": answer, "last_context": last_context}