using System;
using System.Collections.Generic;
using System.Linq;
using FluentValidation;
using NzbDrone.Core.SeriesStats;
using NzbDrone.Core.Tv;
using NzbDrone.Api.Validation;

namespace NzbDrone.Api.Series
{
    public class SeriesModule : NzbDroneRestModule<SeriesResource>
    {
        private readonly ISeriesService _seriesService;
        private readonly ISeriesStatisticsService _seriesStatisticsService;

        public SeriesModule(ISeriesService seriesService, ISeriesStatisticsService seriesStatisticsService)
            : base("/Series")
        {
            _seriesService = seriesService;
            _seriesStatisticsService = seriesStatisticsService;

            GetResourceAll = AllSeries;
            GetResourceById = GetSeries;
            CreateResource = AddSeries;
            UpdateResource = UpdateSeries;
            DeleteResource = DeleteSeries;


            SharedValidator.RuleFor(s => s.RootFolderId).ValidId();
            SharedValidator.RuleFor(s => s.QualityProfileId).ValidId();


            PostValidator.RuleFor(s => s.Title).NotEmpty();

        }

        private List<SeriesResource> AllSeries()
        {
            var seriesStats = _seriesStatisticsService.SeriesStatistics();
            var seriesModels = ApplyToList(_seriesService.GetAllSeries);

            foreach (var s in seriesModels)
            {
                var stats = seriesStats.SingleOrDefault(ss => ss.SeriesId == s.Id);
                if (stats == null) continue;

                s.EpisodeCount = stats.EpisodeCount;
                s.EpisodeFileCount = stats.EpisodeFileCount;
                s.SeasonCount = stats.SeasonCount;
                s.NextAiring = stats.NextAiring;
            }

            return seriesModels;
        }

        private SeriesResource GetSeries(int id)
        {
            return Apply(_seriesService.GetSeries, id);
        }

        private SeriesResource AddSeries(SeriesResource seriesResource)
        {
            //Todo: Alert the user if this series already exists
            //Todo: We need to create the folder if the user is adding a new series
            //(we can just create the folder and it won't blow up if it already exists)
            //We also need to remove any special characters from the filename before attempting to create it           

            return Apply<Core.Tv.Series>(_seriesService.AddSeries, seriesResource);
        }

        private SeriesResource UpdateSeries(SeriesResource seriesResource)
        {
            return Apply<Core.Tv.Series>(_seriesService.UpdateSeries, seriesResource);
        }

        private void DeleteSeries(int id)
        {
            var deleteFiles = Convert.ToBoolean(Request.Headers["deleteFiles"].FirstOrDefault());
            _seriesService.DeleteSeries(id, deleteFiles);
        }
    }

}