using FrameworkDAL.DTO.DataSync;
using GB5Shared.DTO.Framework.Login;

namespace FrameworkBLL.DataSync
{
    public interface IDataSyncImportBLL
    {
        // Reads the ZIP, parses manifest.json, and validates table schemas.
        // Does NOT write any data — safe to call for preview.
        Task<SyncImportPreviewDTO> ValidateImportFileAsync(Stream zipStream, LoginDTO login, CancellationToken ct);

        // Reads the ZIP, creates a TDSYNCRUNLOG entry, and imports data into the target DB.
        // Returns the RunId so the caller can poll GetSyncRunLog for progress.
        // Import runs synchronously for files already on the server (< ~500 MB).
        Task<int> ImportFromFileAsync(
            Stream zipStream,
            int targetDbInstanceId,
            byte conflictPolicy,
            LoginDTO login,
            CancellationToken ct);
    }
}