from __future__ import annotations

from fastapi import APIRouter
from sqlalchemy import text

from app.core.config import get_settings
from app.db.session import get_engine
from app.schemas.common import HealthCheckRead

router = APIRouter(prefix="/health")


@router.get(
    "",
    response_model=HealthCheckRead,
    summary="服务健康检查",
    description="检查服务基础状态，并在系统初始化完成后验证数据库连通性。",
)
def health_check() -> HealthCheckRead:
    settings = get_settings()
    database_ok = False
    database_error = None

    if settings.setup_completed:
        try:
            with get_engine().connect() as connection:
                connection.execute(text("SELECT 1"))
            database_ok = True
        except Exception as exc:  # pragma: no cover - runtime connectivity branch
            database_error = str(exc)

    return HealthCheckRead(
        status="ok" if database_ok else "degraded",
        database={
            "configured": settings.setup_completed,
            "ok": database_ok,
            "error": database_error,
        },
        redis={"configured": bool(settings.redis_url), "enabled": bool(settings.redis_url)},
    )
