using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using ErsatzTV.Infrastructure.Data;
using MediatR;
using Microsoft.EntityFrameworkCore;

namespace ErsatzTV.Application.ProgramSchedules.Queries
{
    public class GetAllProgramSchedulesHandler : IRequestHandler<GetAllProgramSchedules, List<ProgramScheduleViewModel>>
    {
        private readonly IDbContextFactory<TvContext> _dbContextFactory;

        public GetAllProgramSchedulesHandler(IDbContextFactory<TvContext> dbContextFactory) =>
            _dbContextFactory = dbContextFactory;

        public async Task<List<ProgramScheduleViewModel>> Handle(
            GetAllProgramSchedules request,
            CancellationToken cancellationToken)
        {
            await using TvContext dbContext = _dbContextFactory.CreateDbContext();
            return await dbContext.ProgramSchedules
                .Map(
                    ps => new ProgramScheduleViewModel(
                        ps.Id,
                        ps.Name,
                        ps.KeepMultiPartEpisodesTogether,
                        ps.TreatCollectionsAsShows))
                .ToListAsync(cancellationToken);
        }
    }
}