using Application.Abstractions.Messaging;
using Application.Abstractions.YouTube;
using SharedKernel.Results;

namespace Application.Features.Admin.Channel.YouTubePubSub.ManualDetect;

internal sealed class Handler(
    IMediator mediator,
    IYouTubePubSubService pubSubService
) : ICommandHandler<Command, Result>
{
    public async Task<Result> Handle(Command request, CancellationToken ct)
    {
        if (string.IsNullOrWhiteSpace(request.VideoID) || string.IsNullOrWhiteSpace(request.YouTubeChannelID))
        {
            return Result.Failure(Error.Problem("YouTubePubSub.ManualDetectInvalid", "Video ID와 YouTube Channel ID가 필요합니다."));
        }

        // 수동 트리거는 dedupe 마커를 먼저 제거해서 재처리 가능하게 함
        // (이미 한번 처리했어도 다시 감지 시도)
        await pubSubService.SetLastProcessedVideoIdAsync(request.YouTubeChannelID, string.Empty, ct);

        await mediator.Send(new Application.Features.Api.YouTube.PubSubNotify.Command(
            request.VideoID,
            request.YouTubeChannelID,
            string.Empty,
            DateTime.UtcNow,
            DateTime.UtcNow
        ), ct);

        return Result.Success();
    }
}