"""FastAPI 应用工厂。"""

from fastapi import FastAPI

from app.auth.routes import router as auth_router
from app.conversations.routes import router as conversations_router
from app.conversations.routes import run_router
from app.core.config import get_settings
from app.core.errors import install_error_handlers
from app.core.middleware import RequestContextMiddleware, configure_logging
from app.db.session import init_engine


def create_app() -> FastAPI:
    settings = get_settings()
    configure_logging(settings.log_level)
    app = FastAPI(
        title="Hunjing API",
        version="0.1.0",
        # 公共契约位于 docs/contracts 与 openapi/；本服务 docs 仅供开发调试。
        docs_url="/_dev/docs",
        openapi_url="/_dev/openapi.json",
    )
    install_error_handlers(app)
    init_engine(app)
    app.add_middleware(RequestContextMiddleware)
    app.include_router(auth_router)
    app.include_router(conversations_router)
    app.include_router(run_router)

    @app.get("/healthz", tags=["ops"])
    async def healthz() -> dict[str, str]:
        return {"status": "ok", "env": settings.env}

    return app


app = create_app()