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

namespace Kyoo.Models
{
	public class Show : IMergable<Show>
	{
		[JsonIgnore] public long ID { get; set; }

		public string Slug { get; set; }
		public string Title { get; set; }
		public string[] Aliases { get; set; }
		[JsonIgnore] public string Path { get; set; }
		public string Overview { get; set; }
		public Status? Status { get; set; }
		public string TrailerUrl { get; set; }

		public long? StartYear { get; set; }
		public long? EndYear { get; set; }

		public string Poster { get; set; }
		public string Logo { get; set; }
		public string Backdrop { get; set; }

		public virtual IEnumerable<MetadataID> ExternalIDs { get; set; }

		public bool IsMovie { get; set; }
		
		public bool IsCollection;
		
		public virtual IEnumerable<Genre> Genres
		{
			get { return GenreLinks?.Select(x => x.Genre).OrderBy(x => x.Name); }
			set { GenreLinks = value?.Select(x => new GenreLink(this, x)).ToList(); }
		}
		[JsonIgnore] public virtual IEnumerable<GenreLink> GenreLinks { get; set; }
		public virtual Studio Studio { get; set; }
		[JsonIgnore] public virtual IEnumerable<PeopleLink> People { get; set; }
		[JsonIgnore] public virtual IEnumerable<Season> Seasons { get; set; }
		[JsonIgnore] public virtual IEnumerable<Episode> Episodes { get; set; }

		public Show() { }

		public Show(string slug, 
			string title,
			IEnumerable<string> aliases,
			string path, string overview,
			string trailerUrl,
			IEnumerable<Genre> genres,
			Status? status,
			long? startYear,
			long? endYear,
			IEnumerable<MetadataID> externalIDs)
		{
			Slug = slug;
			Title = title;
			Aliases = aliases?.ToArray();
			Path = path;
			Overview = overview;
			TrailerUrl = trailerUrl;
			Genres = genres;
			Status = status;
			StartYear = startYear;
			EndYear = endYear;
			ExternalIDs = externalIDs;
			IsCollection = false;
		}

		public Show(string slug,
			string title, 
			IEnumerable<string> aliases, 
			string path,
			string overview, 
			string trailerUrl,
			Status? status, 
			long? startYear,
			long? endYear,
			string poster,
			string logo, 
			string backdrop,
			IEnumerable<MetadataID> externalIDs)
		{
			Slug = slug;
			Title = title;
			Aliases = aliases?.ToArray();
			Path = path;
			Overview = overview;
			TrailerUrl = trailerUrl;
			Status = status;
			StartYear = startYear;
			EndYear = endYear;
			Poster = poster;
			Logo = logo;
			Backdrop = backdrop;
			ExternalIDs = externalIDs;
			IsCollection = false;
		}

		public string GetID(string provider)
		{
			return ExternalIDs?.FirstOrDefault(x => x.Provider.Name == provider)?.DataID;
		}
		
		public Show Merge(Show other)
		{
			if (other == null)
				return this;
			if (ID == -1)
				ID = other.ID;
			Slug ??= other.Slug;
			Title ??= other.Title;
			Aliases = Utility.MergeLists(Aliases, other.Aliases).ToArray();
			Genres = Utility.MergeLists(Genres, other.Genres, 
				(x, y) => x.Slug == y.Slug);
			Path ??= other.Path;
			Overview ??= other.Overview;
			TrailerUrl ??= other.TrailerUrl;
			Status ??= other.Status;
			StartYear ??= other.StartYear;
			EndYear ??= other.EndYear;
			Poster ??= other.Poster;
			Logo ??= other.Logo;
			Backdrop ??= other.Backdrop;
			Studio ??= other.Studio;
			ExternalIDs = Utility.MergeLists(ExternalIDs, other.ExternalIDs, 
				(x, y) => x.Provider.Name == y.Provider.Name);
			return this;
		}
	}

	public enum Status { Finished, Airing, Planned }
}