export const HYDROGEN_MIN_DATE = '2024-01-01';

// hydrogen_fuel_ledger.refuel_time 已是业务本地时间字面值，直接使用即可（不再 +8 小时）
export const HYDROGEN_TABLE = 'hydrogen_fuel_ledger';
export const HYDROGEN_LOCAL = `refuel_time`;
export const HYDROGEN_BASE_WHERE = `del_flag = '0'`;
export const HYDROGEN_BASE_WHERE_B = `b.del_flag = '0'`;
// 充值记录与加氢事实共用台账。经营、日报和下钻必须显式排除充值，
// 充值模块则继续使用 BASE 条件读取自己的流水。
export const HYDROGEN_FUEL_ONLY_WHERE = `${HYDROGEN_BASE_WHERE} AND COALESCE(record_source, '') <> 'external_recharge_manual'`;
export const HYDROGEN_FUEL_ONLY_WHERE_B = `${HYDROGEN_BASE_WHERE_B} AND COALESCE(b.record_source, '') <> 'external_recharge_manual'`;
export const ELECTRIC_LOCAL = `charging_start_time`;

// ---------------------------------------------------------------------------
// 单站看板的 SQL 片段与租户常量。
// 这些是 SQL 的一部分，放在 constants.ts 而不是路由里，避免 SQL 拼装散落两处。
// ---------------------------------------------------------------------------

/** 租户只由服务端配置决定，不接受浏览器传值。 */
export const HYDROGEN_TENANT_ID = process.env.HYDROGEN_TENANT_ID?.trim() || '000000';
export const MANUAL_RECHARGE_SOURCE = 'external_recharge_manual';
export const NORMALIZED_PLATE = (column: string) =>
  `UPPER(REPLACE(REPLACE(REPLACE(TRIM(${column}), ' ', ''), '.', ''), '·', ''))`;
export const NORMALIZED_PLATE_UNICODE = (column: string) =>
  `CONVERT(${NORMALIZED_PLATE(column)} USING utf8mb4) COLLATE utf8mb4_unicode_ci`;
export const EXTERNAL_CUSTOMER_MAP_CTE = `
  WITH external_vehicle_candidates AS (
    SELECT ${NORMALIZED_PLATE_UNICODE('plate_number')} AS normalizedPlate,
           MAX(NULLIF(TRIM(actual_user), '')) AS customerName,
           COUNT(DISTINCT NULLIF(TRIM(actual_user), '')) AS customerCount
    FROM hydrogen_order_transfer_external_vehicle_user
    WHERE NULLIF(TRIM(plate_number), '') IS NOT NULL
    GROUP BY ${NORMALIZED_PLATE_UNICODE('plate_number')}
  ), external_vehicle_map AS (
    SELECT normalizedPlate, customerName
    FROM external_vehicle_candidates
    WHERE customerCount = 1
      AND customerName IS NOT NULL
  )`;

// ---------------------------------------------------------------------------
// 氢能 v2 承担方映射片段（b.settlement_type：1 客户 / 2 我司 / 其余“其他”）。
// 与站点区域回退表达式一样，这些片段被多条查询共享，集中放置避免各处复制。
// ---------------------------------------------------------------------------

export const CUSTOMER_BEARING_ORDER = "b.settlement_type = 1";
export const COMPANY_BEARING_ORDER = "b.settlement_type = 2";
export const OTHER_BEARING_ORDER =
  "(b.settlement_type NOT IN (1, 2) OR b.settlement_type IS NULL)";