SET NOCOUNT ON;

DECLARE @RequiredObjects TABLE(ObjectName sysname, ObjectType varchar(2));
INSERT @RequiredObjects(ObjectName,ObjectType) VALUES
  (N'dbo.XiaoshuSyncCommandLog',N'U'),
  (N'dbo.XiaoshuSyncChangeLog',N'U'),
  (N'dbo.XiaoshuSync_ExecuteCommand',N'P'),
  (N'dbo.XiaoshuSync_ZL_User_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_Node_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_CommonModel_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_kcbd_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_order_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_skjl_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_ss_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_lxjl_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_gywjl_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_cpda_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_ck_Changes',N'TR'),
  (N'dbo.XiaoshuSync_ZL_C_Article_Changes',N'TR');

IF EXISTS (
  SELECT 1 FROM @RequiredObjects required
  WHERE OBJECT_ID(required.ObjectName,required.ObjectType) IS NULL
)
BEGIN
  SELECT required.ObjectName,required.ObjectType
  FROM @RequiredObjects required
  WHERE OBJECT_ID(required.ObjectName,required.ObjectType) IS NULL;
  THROW 51010,N'同步桥数据库对象安装不完整，请先执行 install.sql',1;
END;

SELECT
  required.ObjectName,
  required.ObjectType,
  CAST(1 AS bit) AS Installed
FROM @RequiredObjects required
ORDER BY required.ObjectType,required.ObjectName;

SELECT Dataset,COUNT_BIG(*) AS PendingChangeCount,MAX(Id) AS Watermark,MAX(ChangedAt) AS LatestChangeAt
FROM dbo.XiaoshuSyncChangeLog
GROUP BY Dataset
ORDER BY Dataset;

SELECT N'users' AS Dataset,COUNT_BIG(*) AS ActiveCount FROM dbo.ZL_User
UNION ALL SELECT N'nodes',COUNT_BIG(*) FROM dbo.ZL_Node
UNION ALL SELECT N'course-bindings',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=58 AND COALESCE(Status,99)<>-2
UNION ALL SELECT N'appointments',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=54 AND COALESCE(Status,99)<>-2
UNION ALL SELECT N'lessons',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=59 AND COALESCE(Status,99)<>-2
UNION ALL SELECT N'learning-records',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=56 AND COALESCE(Status,99)<>-2
UNION ALL SELECT N'practice-records',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=53 AND COALESCE(Status,99)<>-2
UNION ALL SELECT N'memory-records',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=60 AND COALESCE(Status,99)<>-2
UNION ALL SELECT N'assessments',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=61 AND COALESCE(Status,99)<>-2
UNION ALL SELECT N'vocabulary',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=52 AND COALESCE(Status,99)<>-2
UNION ALL SELECT N'special-training',COUNT_BIG(*) FROM dbo.ZL_CommonModel WHERE ModelID=2 AND NodeID=3 AND COALESCE(Status,99)<>-2
ORDER BY Dataset;

SELECT
  CAST(CASE WHEN OBJECT_DEFINITION(OBJECT_ID(N'dbo.XiaoshuSync_ExecuteCommand')) LIKE N'%51001%尚未与旧站业务逻辑绑定%'
    THEN 1 ELSE 0 END AS bit) AS WritesFailClosed,
  N'WritesFailClosed=1 表示当前仅允许只读同步；未绑定正式 BLL 前不得在新云函数启用写桥。' AS Explanation;