using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Kyoo.Models
{
	public class Episode : IMergable<Episode>
	{
		[JsonIgnore] public long ID { get; set; }
		[JsonIgnore] public long ShowID { get; set; }
		[JsonIgnore] public virtual Show Show { get; set; }
		[JsonIgnore] public long? SeasonID { get; set; }
		[JsonIgnore] public virtual Season Season { get; set; }

		public long SeasonNumber { get; set; }
		public long EpisodeNumber { get; set; }
		public long AbsoluteNumber { get; set; }
		[JsonIgnore] public string Path { get; set; }
		public string Title { get; set; }
		public string Overview { get; set; }
		public DateTime? ReleaseDate { get; set; }

		public long Runtime { get; set; } //This runtime variable should be in minutes

		[JsonIgnore] public string ImgPrimary { get; set; }
		public string ExternalIDs { get; set; }

		[JsonIgnore] public virtual IEnumerable<Track> Tracks { get; set; }

		public string ShowTitle; //Used in the API response only
		public string Link; //Used in the API response only
		public string Thumb; //Used in the API response only


		public Episode()
		{
			SeasonNumber = -1;
			EpisodeNumber = -1;
			AbsoluteNumber = -1;
		}

		public Episode(long seasonNumber, long episodeNumber, long absoluteNumber, string title, string overview, DateTime? releaseDate, long runtime, string imgPrimary, string externalIDs)
		{
			SeasonNumber = seasonNumber;
			EpisodeNumber = episodeNumber;
			AbsoluteNumber = absoluteNumber;
			Title = title;
			Overview = overview;
			ReleaseDate = releaseDate;
			Runtime = runtime;
			ImgPrimary = imgPrimary;
			ExternalIDs = externalIDs;
		}

		public Episode(long showID, long seasonID, long seasonNumber, long episodeNumber, long absoluteNumber, string path, string title, string overview, DateTime? releaseDate, long runtime, string imgPrimary, string externalIDs)
		{
			ShowID = showID;
			SeasonID = seasonID;
			SeasonNumber = seasonNumber;
			EpisodeNumber = episodeNumber;
			AbsoluteNumber = absoluteNumber;
			Path = path;
			Title = title;
			Overview = overview;
			ReleaseDate = releaseDate;
			Runtime = runtime;
			ImgPrimary = imgPrimary;
			ExternalIDs = externalIDs;
		}

		public static string GetSlug(string showSlug, long seasonNumber, long episodeNumber)
		{
			return showSlug + "-s" + seasonNumber + "e" + episodeNumber;
		}

		public Episode SetLink(string showSlug)
		{
			Link = GetSlug(showSlug, SeasonNumber, EpisodeNumber);
			Thumb = "thumb/" + Link;
			return this;
		}

		public Episode LoadShowDetails()
		{
			SetLink(Show.Slug);
			ShowTitle = Show.Title;
			return this;
		}

		public Episode Merge(Episode other)
		{
			if (other == null)
				return this;
			if (ID == -1)
				ID = other.ID;
			if (ShowID == -1)
				ShowID = other.ShowID;
			if (SeasonID == -1)
				SeasonID = other.SeasonID;
			if (SeasonNumber == -1)
				SeasonNumber = other.SeasonNumber;
			if (EpisodeNumber == -1)
				EpisodeNumber = other.EpisodeNumber;
			if (AbsoluteNumber == -1)
				AbsoluteNumber = other.AbsoluteNumber;
			Path ??= other.Path;
			Title ??= other.Title;
			Overview ??= other.Overview;
			ReleaseDate ??= other.ReleaseDate;
			if (Runtime == -1)
				Runtime = other.Runtime;
			ImgPrimary ??= other.ImgPrimary;
			ExternalIDs = string.Join('|', new [] { ExternalIDs, other.ExternalIDs }.Where(x => !string.IsNullOrEmpty(x)));
			return this;
		}
	}
}