import logging
import sys
from contextlib import asynccontextmanager
from pathlib import Path

import uvicorn
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from loguru import logger

from app.api import router as api_router
from app.config import settings
from app.database import check_database, engine
from app.dependencies import build_container


def _configure_uvicorn_access_log_filters() -> None:
    """第三方或 Demo 若轮询 pending-confirmation，无条目时 404 为常态；压低 uvicorn access 刷屏。"""

    class _SuppressPendingPoll404(logging.Filter):
        def filter(self, record: logging.LogRecord) -> bool:
            try:
                msg = record.getMessage()
            except Exception:
                return True
            if "/pending-confirmation" in msg and "GET" in msg and " 404 " in msg:
                return False
            return True

    logging.getLogger("uvicorn.access").addFilter(_SuppressPendingPoll404())


def configure_logging() -> None:
    """集中配置 loguru sink；由 create_app 显式调用，避免 import-time 副作用。"""
    logger.remove()
    logger.add(
        sys.stderr,
        format=(
            "<green>{time:YYYY-MM-DD HH:mm:ss}</green> | "
            "<level>{level: <8}</level> | "
            "<cyan>{name}</cyan>:<cyan>{function}</cyan> - <level>{message}</level>"
        ),
    )


@asynccontextmanager
async def lifespan(app: FastAPI):
    await check_database()
    logger.info(
        "Database connection verified; ensure schema is applied with "
        "`alembic upgrade head` before serving traffic"
    )
    container = build_container(settings)
    app.state.container = container
    await container.start()
    try:
        yield
    finally:
        await container.shutdown()
        await engine.dispose()
        logger.info("Database engine disposed")


def create_app() -> FastAPI:
    configure_logging()
    _configure_uvicorn_access_log_filters()
    application = FastAPI(
        title="Operation Room Monitor",
        lifespan=lifespan,
    )
    if settings.demo_cors_enabled:
        origins = settings.parsed_demo_cors_origins()
        if origins:
            application.add_middleware(
                CORSMiddleware,
                allow_origins=origins,
                allow_credentials=origins != ["*"],
                allow_methods=["*"],
                allow_headers=["*"],
            )
            logger.info("CORS enabled for demo client; origins={}", origins)
    application.include_router(api_router)
    if settings.demo_orchestrator_enabled:
        from app.routers import demo_orch

        application.include_router(demo_orch.router)
        logger.info(
            "Demo orchestrator enabled: POST /internal/demo/orchestrate-and-start",
        )
    else:
        logger.info(
            "Demo orchestrator disabled (DEMO_ORCHESTRATOR_ENABLED=false): "
            "GET /internal/demo/orchestrator-status for status; "
            "POST /internal/demo/orchestrate-and-start is not registered",
        )
    return application


app = create_app()


def main() -> None:
    root = Path(__file__).resolve().parent
    kwargs: dict = {
        "host": settings.server_host,
        "port": settings.server_port,
    }
    if settings.server_reload:
        kwargs["reload"] = True
        kwargs["reload_dirs"] = [str(root)]
        kwargs["reload_includes"] = ["*.py"]
        kwargs["reload_excludes"] = [
            "**/.venv/**",
            "**/__pycache__/**",
            "**/web/**",
            "**/scripts/demo_client/**",
            "**/.git/**",
        ]
    uvicorn.run("main:app", **kwargs)


if __name__ == "__main__":
    main()