import asyncio
from contextlib import asynccontextmanager
from datetime import datetime

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

from app.config import settings
from app.database import init_db, get_db, async_engine
from app.routers import auth, projects, folders, documents, tags, search, links, export
from app.services.auth import cleanup_expired_blocklist


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Startup: init database
    await init_db()
    yield
    # Shutdown
    await async_engine.dispose()


app = FastAPI(
    title="Claudia Docs API",
    description="Gestor documental para agentes de IA",
    version="1.0.0",
    lifespan=lifespan,
)

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


# Include routers
app.include_router(auth.router)
app.include_router(projects.router)
app.include_router(folders.router)
app.include_router(documents.router)
app.include_router(tags.router)
app.include_router(search.router)
app.include_router(links.router)
app.include_router(export.router)


@app.get("/api/v1/health")
async def health():
    return {"status": "ok", "timestamp": datetime.utcnow().isoformat()}


@app.exception_handler(Exception)
async def global_exception_handler(request: Request, exc: Exception):
    import logging
    logger = logging.getLogger(__name__)
    logger.error(f"Unhandled exception: {exc}", exc_info=True)
    return JSONResponse(
        status_code=500,
        content={"detail": "Internal server error"},
    )