using LiteCqrs;
using Microsoft.EntityFrameworkCore;
using TeleWave.Application.Common.Interfaces;
using TeleWave.Application.Common.Models;

namespace TeleWave.Application.Media.Delete;

public sealed class DeleteMediaAssetCommandHandler(IAppDbContext dbContext, IMediaStorage storage)
    : ICommandHandler<DeleteMediaAssetCommand, Result>
{
    public async Task<Result> Handle(
        DeleteMediaAssetCommand command,
        CancellationToken cancellationToken
    )
    {
        var asset = await dbContext.MediaAssets.FirstOrDefaultAsync(
            x => x.Id == command.Id,
            cancellationToken
        );
        if (asset is null)
            return Result.Failure(MediaErrors.NotFound);

        // TODO(этап 2): запретить удаление, пока ассет используется в расписании/пуле канала.
        storage.DeleteAssetArtifacts(asset.Id, asset.OriginalExtension);
        dbContext.MediaAssets.Remove(asset);

        return Result.Success();
    }
}