using HrynCo.DAL.Abstract;
using HrynCo.NotificationService.DAL.Abstract.Repositories;
using HrynCo.NotificationService.Services.Core;
using HrynCo.NotificationService.Services.Logging;
using static HrynCo.NotificationService.Services.Core.ServiceResultHelper;

namespace HrynCo.NotificationService.Services.EmailChannels.Delete;

internal sealed class DeleteEmailChannelHandler
    : RequestHandler<DeleteEmailChannelCommand, ServiceResult<Unit>>
{
    private readonly IEmailChannelRepository _channels;

    public DeleteEmailChannelHandler(
        IContextualSerilogLogger<DeleteEmailChannelCommand> logger,
        IUnitOfWork unitOfWork,
        IEmailChannelRepository channels)
        : base(logger, unitOfWork)
    {
        _channels = channels;
    }

    protected override async Task<ServiceResult<Unit>> DoOnHandle(
        DeleteEmailChannelCommand request, CancellationToken cancellationToken)
    {
        var channel = await _channels.GetByIdAsync(request.Id, cancellationToken);

        if (channel is null)
            return Failure<Unit>("Email channel not found.", ServiceErrorCode.NotFound);

        await _channels.DeleteAsync(channel, cancellationToken);

        return Success(Unit.Value);
    }
}