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

namespace TeleWave.Application.Broadcast.Bumpers;

public sealed class SetBumperTemplateBackgroundCommandHandler(IAppDbContext dbContext)
    : ICommandHandler<SetBumperTemplateBackgroundCommand, Result>
{
    public async Task<Result> Handle(
        SetBumperTemplateBackgroundCommand command,
        CancellationToken cancellationToken
    )
    {
        var channel = await dbContext.Channels
            .Include(c => c.BumperTemplates)
            .FirstOrDefaultAsync(c => c.Id == command.ChannelId, cancellationToken);
        if (channel is null)
            return Result.Failure(ChannelErrors.NotFound);

        var template = channel.FindBumperTemplate(command.TemplateId);
        if (template is null)
            return Result.Failure(ChannelErrors.BumperTemplateNotFound);

        template.SetBackgroundImage(command.Extension);
        return Result.Success();
    }
}