from __future__ import annotations

import logging

from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse
from slowapi.errors import RateLimitExceeded

from app.config import settings
from app.rate_limit import ip_limiter, key_limiter
from app.routers import health, suggestion

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s %(levelname)s %(name)s: %(message)s",
)

logger = logging.getLogger(__name__)

app = FastAPI(
    title="Meeting AI Assistant",
    version=settings.app_version,
)

# Shared limiters — both attached so SlowAPIMiddleware can find them.
app.state.limiter = ip_limiter
app.state.key_limiter = key_limiter


@app.exception_handler(RateLimitExceeded)
async def _rate_limit_handler(request: Request, exc: RateLimitExceeded) -> JSONResponse:
    retry_after = getattr(exc, "retry_after", None)
    headers = {"Retry-After": str(int(retry_after))} if retry_after else {}
    return JSONResponse(
        status_code=429,
        content={"detail": "Rate limit exceeded", "limit": str(exc.detail)},
        headers=headers,
    )


app.add_middleware(
    CORSMiddleware,
    allow_origins=settings.cors_origins_list,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

app.include_router(health.router)
app.include_router(suggestion.router)