using System;
using System.Threading;
using System.Threading.Tasks;
using ErsatzTV.Core;
using ErsatzTV.Core.Domain.Filler;
using ErsatzTV.Infrastructure.Data;
using LanguageExt;
using MediatR;
using Microsoft.EntityFrameworkCore;
using Unit = LanguageExt.Unit;

namespace ErsatzTV.Application.Filler.Commands
{
    public class CreateFillerPresetHandler : IRequestHandler<CreateFillerPreset, Either<BaseError, Unit>>
    {
        private readonly IDbContextFactory<TvContext> _dbContextFactory;

        public CreateFillerPresetHandler(IDbContextFactory<TvContext> dbContextFactory)
        {
            _dbContextFactory = dbContextFactory;
        }

        public async Task<Either<BaseError, Unit>> Handle(CreateFillerPreset request, CancellationToken cancellationToken)
        {
            try
            {
                await using TvContext dbContext = _dbContextFactory.CreateDbContext();

                var fillerPreset = new FillerPreset
                {
                    Name = request.Name,
                    FillerKind = request.FillerKind,
                    FillerMode = request.FillerMode,
                    Duration = request.Duration,
                    Count = request.Count,
                    PadToNearestMinute = request.PadToNearestMinute,
                    CollectionType = request.CollectionType,
                    CollectionId = request.CollectionId,
                    MediaItemId = request.MediaItemId,
                    MultiCollectionId = request.MultiCollectionId,
                    SmartCollectionId = request.SmartCollectionId
                };

                await dbContext.FillerPresets.AddAsync(fillerPreset, cancellationToken);
                await dbContext.SaveChangesAsync(cancellationToken);

                return Unit.Default;
            }
            catch (Exception ex)
            {
                return BaseError.New(ex.Message);
            }
        }
    }
}