namespace IOL.GreatOffice.Api.Endpoints.Internal.Account;

public class GetAccountArchiveRoute : RouteBaseAsync.WithoutRequest.WithActionResult<UserArchiveDto>
{
	private readonly AppDbContext _context;

	/// <inheritdoc />
	public GetAccountArchiveRoute(AppDbContext context) {
		_context = context;
	}

	/// <summary>
	/// Get a data archive with the currently logged on user's data.
	/// </summary>
	/// <param name="cancellationToken"></param>
	/// <returns></returns>
	[HttpGet("~/_/account/archive")]
	public override async Task<ActionResult<UserArchiveDto>> HandleAsync(CancellationToken cancellationToken = default) {
		var user = _context.Users.SingleOrDefault(c => c.Id == LoggedInUser.Id);
		if (user == default) {
			await HttpContext.SignOutAsync();
			return Unauthorized();
		}

		var entries = _context.TimeEntries
							  .AsNoTracking()
							  .Include(c => c.Labels)
							  .Include(c => c.Category)
							  .Where(c => c.User.Id == user.Id)
							  .ToList();

		var jsonOptions = new JsonSerializerOptions {
				WriteIndented = true
		};

		var dto = new UserArchiveDto(user);
		dto.Entries.AddRange(entries.Select(entry => new UserArchiveDto.EntryDto {
				CreatedAt = entry.CreatedAt.ToString("yyyy-MM-ddTHH:mm:ssZ"),
				StartDateTime = entry.Start,
				StopDateTime = entry.Stop,
				Description = entry.Description,
				Labels = entry.Labels
							  .Select(c => new UserArchiveDto.LabelDto {
									  Name = c.Name,
									  Color = c.Color
							  })
							  .ToList(),
				Category = new UserArchiveDto.CategoryDto {
						Name = entry.Category.Name,
						Color = entry.Category.Color
				},
		}));

		dto.CountEntries();

		var entriesSerialized = JsonSerializer.SerializeToUtf8Bytes(dto, jsonOptions);

		return File(entriesSerialized,
					"application/json",
					user.Username + "-time-tracker-archive-" + DateTime.UtcNow.ToString("yyyyMMddTHHmmss") + ".json");
	}
}