from fastapi import APIRouter, Depends
from sqlalchemy import text
from sqlalchemy.exc import SQLAlchemyError

from app.db.session import check_database_health, get_engine
from app.schemas.database import DataCountItem
from app.services.auth import require_authenticated_user

router = APIRouter()


@router.get("/health")
def health() -> dict[str, object]:
    try:
        db_status = check_database_health()
    except (SQLAlchemyError, RuntimeError, Exception) as exc:
        return {
            "app": "ok",
            "database": {
                "connected": False,
                "error": str(exc),
            },
        }

    return {
        "app": "ok",
        "database": db_status,
    }


@router.get("/data-summary", response_model=list[DataCountItem], dependencies=[Depends(require_authenticated_user)])
def data_summary() -> list[DataCountItem]:
    summary_tables = [
        ("dept_count", "部门数量", "sys_department"),
        ("warehouse_count", "仓库数量", "wh_warehouse"),
        ("item_count", "物料数量", "md_item"),
        ("product_count", "产品数量", "md_product"),
        ("customer_count", "客户数量", "md_customer"),
        ("sales_order_count", "订单数量", "so_sales_order"),
        ("mrp_count", "MRP需求数量", "mrp_material_demand"),
        ("work_order_count", "工单数量", "pp_work_order"),
    ]

    engine = get_engine()
    result: list[DataCountItem] = []
    with engine.connect() as conn:
        for code, label, table_name in summary_tables:
            count = conn.execute(text(f"SELECT COUNT(*) FROM {table_name}")).scalar() or 0
            result.append(DataCountItem(code=code, label=label, count=int(count)))
    return result