// Kyoo - A portable and vast media library solution.
// Copyright (c) Kyoo.
//
// See AUTHORS.md and LICENSE file in the project root for full license information.
//
// Kyoo is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// Kyoo is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Kyoo. If not, see <https://www.gnu.org/licenses/>.

using System;
using System.Collections.Generic;
using Kyoo.Abstractions.Controllers;
using Kyoo.Abstractions.Models.Attributes;

namespace Kyoo.Abstractions.Models
{
	/// <summary>
	/// A series or a movie.
	/// </summary>
	public class Show : IResource, IMetadata, IOnMerge, IThumbnails
	{
		/// <inheritdoc />
		public int ID { get; set; }

		/// <inheritdoc />
		public string Slug { get; set; }

		/// <summary>
		/// The title of this show.
		/// </summary>
		public string Title { get; set; }

		/// <summary>
		/// The list of alternative titles of this show.
		/// </summary>
		[EditableRelation] public string[] Aliases { get; set; }

		/// <summary>
		/// The path of the root directory of this show.
		/// This can be any kind of path supported by <see cref="IFileSystem"/>
		/// </summary>
		[SerializeIgnore] public string Path { get; set; }

		/// <summary>
		/// The summary of this show.
		/// </summary>
		public string Overview { get; set; }

		/// <summary>
		/// Is this show airing, not aired yet or finished?
		/// </summary>
		public Status Status { get; set; }

		/// <summary>
		/// An URL to a trailer. This could be any path supported by the <see cref="IFileSystem"/>.
		/// </summary>
		/// TODO for now, this is set to a youtube url. It should be cached and converted to a local file.
		[Obsolete("Use Images instead of this, this is only kept for the API response.")]
		public string TrailerUrl => Images?.GetValueOrDefault(Models.Images.Trailer);

		/// <summary>
		/// The date this show started airing. It can be null if this is unknown.
		/// </summary>
		public DateTime? StartAir { get; set; }

		/// <summary>
		/// The date this show finished airing.
		/// It must be after the <see cref="StartAir"/> but can be the same (example: for movies).
		/// It can also be null if this is unknown.
		/// </summary>
		public DateTime? EndAir { get; set; }

		/// <inheritdoc />
		public Dictionary<int, string> Images { get; set; }

		/// <summary>
		/// True if this show represent a movie, false otherwise.
		/// </summary>
		public bool IsMovie { get; set; }

		/// <inheritdoc />
		[EditableRelation][LoadableRelation] public ICollection<MetadataID> ExternalIDs { get; set; }

		/// <summary>
		/// The ID of the Studio that made this show.
		/// </summary>
		[SerializeIgnore] public int? StudioID { get; set; }

		/// <summary>
		/// The Studio that made this show.
		/// This must be explicitly loaded via a call to <see cref="ILibraryManager.Load"/>.
		/// </summary>
		[LoadableRelation(nameof(StudioID))][EditableRelation] public Studio Studio { get; set; }

		/// <summary>
		/// The list of genres (themes) this show has.
		/// </summary>
		[LoadableRelation][EditableRelation] public ICollection<Genre> Genres { get; set; }

		/// <summary>
		/// The list of people that made this show.
		/// </summary>
		[LoadableRelation][EditableRelation] public ICollection<PeopleRole> People { get; set; }

		/// <summary>
		/// The different seasons in this show. If this is a movie, this list is always null or empty.
		/// </summary>
		[LoadableRelation] public ICollection<Season> Seasons { get; set; }

		/// <summary>
		/// The list of episodes in this show.
		/// If this is a movie, there will be a unique episode (with the seasonNumber and episodeNumber set to null).
		/// Having an episode is necessary to store metadata and tracks.
		/// </summary>
		[LoadableRelation] public ICollection<Episode> Episodes { get; set; }

		/// <summary>
		/// The list of libraries that contains this show.
		/// </summary>
		[LoadableRelation] public ICollection<Library> Libraries { get; set; }

		/// <summary>
		/// The list of collections that contains this show.
		/// </summary>
		[LoadableRelation] public ICollection<Collection> Collections { get; set; }

		/// <inheritdoc />
		public void OnMerge(object merged)
		{
			if (People != null)
			{
				foreach (PeopleRole link in People)
					link.Show = this;
			}

			if (Seasons != null)
			{
				foreach (Season season in Seasons)
					season.Show = this;
			}

			if (Episodes != null)
			{
				foreach (Episode episode in Episodes)
					episode.Show = this;
			}
		}
	}

	/// <summary>
	/// The enum containing show's status.
	/// </summary>
	public enum Status
	{
		/// <summary>
		/// The status of the show is not known.
		/// </summary>
		Unknown,

		/// <summary>
		/// The show has finished airing.
		/// </summary>
		Finished,

		/// <summary>
		/// The show is still actively airing.
		/// </summary>
		Airing,

		/// <summary>
		/// This show has not aired yet but has been announced.
		/// </summary>
		Planned
	}
}