namespace FrameworkSL.Hubs.DataSync
{
    // Strongly-typed SignalR client contract for the DataSyncHub.
    // Hub group: "datasync:{runId}" — client joins via JoinRunGroup(int runId).
    public interface IDataSyncClient
    {
        // Sent per chunk: table name, chunk number, rows written so far
        Task ReceiveProgress(SyncProgressDTO progress);

        // Sent once on run completion (success, partial failure, or failure)
        Task ReceiveRunCompleted(SyncRunSummaryDTO summary);

        // Sent on run failure or validation error
        Task ReceiveError(int runId, string message);
    }

    public sealed record SyncProgressDTO(
        int    RunId,
        string TableName,
        int    ChunkNumber,
        int    RowsInChunk,
        int    TotalRowsSoFar,
        string Status);

    public sealed record SyncRunSummaryDTO(
        int    RunId,
        int    SyncJobId,
        byte   Status,
        int    TotalRows,
        int    InsertedRows,
        int    UpdatedRows,
        int    DeletedRows,
        int    SkippedRows,
        string? ErrorDetail,
        DateTime StartedAt,
        DateTime EndedAt);
}