# main.py
import os
import asyncio
from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from fastapi.middleware.cors import CORSMiddleware

# Import agent handler
from agent import run_agent_query

app = FastAPI(title="CFO Bot - Agent API")

# ---------------------------------------------------------
# CORS (adjust for production)
# ---------------------------------------------------------
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # replace with your frontend domain
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# ---------------------------------------------------------
# Request / Response Models
# ---------------------------------------------------------
class QueryRequest(BaseModel):
    query: str
    thread_id: str  # REQUIRED — not optional


class QueryResponse(BaseModel):
    output: str


# ---------------------------------------------------------
# Health check
# ---------------------------------------------------------
@app.get("/")
def root():
    return {"status": "CFO Bot API running", "version": "1.0.0"}


# ---------------------------------------------------------
# Query Route
# ---------------------------------------------------------
@app.post("/query", response_model=QueryResponse)
async def query_endpoint(req: QueryRequest):

    # Validate query
    if not req.query or not req.query.strip():
        raise HTTPException(status_code=400, detail="Query cannot be empty.")

    # Validate thread_id
    if not req.thread_id or not req.thread_id.strip():
        raise HTTPException(status_code=400, detail="thread_id is required.")

    try:
        # Run agent — NO DEFAULT thread_id
        result = await run_agent_query(
            req.query,
            thread_id=req.thread_id
        )
        print(req.query)
    except Exception as exc:
        raise HTTPException(status_code=500, detail=f"Agent failed: {str(exc)}")

    # Extract output properly
    final_output = (
        getattr(result, "final_output", None)
        or (result.get("final_output") if isinstance(result, dict) else None)
    )

    if not final_output:
        final_output = "No response generated."

    return QueryResponse(output=final_output)