using HikvisionAttendanceManager.App.Models;

namespace HikvisionAttendanceManager.App.Services;

public sealed class DepartmentalUserSyncService(
    UserSyncEngine engine,
    OperationHistoryService history)
{
    public async Task<(SyncHistoryEntry Entry, IReadOnlyList<EmployeeSyncResult> Results)> SyncAsync(
        Device device, IEnumerable<HrmsEmployee> employees, string contextSummary,
        IProgress<UserSyncProgress>? progress, CancellationToken cancellationToken)
    {
        var list = employees.ToList();
        AppLogger.TraceEnter("USER_SYNC", nameof(SyncAsync),
            $"device={device.IpAddress} count={list.Count} context={contextSummary}");
        var entry = new SyncHistoryEntry
        {
            Operation = SyncOperationKind.DepartmentalUserSync,
            TargetDevice = device.DisplayName,
            Context = contextSummary,
            Total = list.Count,
            Status = "Running"
        };
        await history.AddAsync(entry, cancellationToken);

        var results = await engine.RunAsync(device, list, initialEnrollment: true, progress, cancellationToken);
        entry.CompletedAt = DateTime.Now;
        entry.Success = results.Count(r => r.OverallResult is "SUCCESS" or "ALREADY_EXISTS");
        entry.Failed = results.Count(r => r.OverallResult is "FAILED" or "PARTIAL");
        entry.Skipped = results.Count(r => r.OverallResult == "SKIPPED");
        entry.Status = entry.Failed > 0 ? "Completed with errors" : "Completed";
        await history.UpdateAsync(entry, cancellationToken);
        AppLogger.TraceExit("USER_SYNC", nameof(SyncAsync),
            $"success={entry.Success} failed={entry.Failed} skipped={entry.Skipped}");
        return (entry, results);
    }
}