// 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 System.Linq;
using System.Threading.Tasks;
using Kyoo.Abstractions.Controllers;
using Kyoo.Abstractions.Models;
using Kyoo.Abstractions.Models.Attributes;
using Kyoo.Abstractions.Models.Permissions;
using Kyoo.Abstractions.Models.Utils;
using Kyoo.Authentication;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using static Kyoo.Abstractions.Models.Utils.Constants;

namespace Kyoo.Core.Api
{
	/// <summary>
	/// Information about one or multiple <see cref="Movie"/>.
	/// </summary>
	[Route("movies")]
	[Route("movie", Order = AlternativeRoute)]
	[ApiController]
	[PartialPermission(nameof(Show))]
	[ApiDefinition("Shows", Group = ResourcesGroup)]
	public class MovieApi(ILibraryManager libraryManager, IThumbnailsManager thumbs)
		: TranscoderApi<Movie>(libraryManager.Movies, thumbs)
	{
		/// <summary>
		/// Get studio that made the show
		/// </summary>
		/// <remarks>
		/// Get the studio that made the show.
		/// </remarks>
		/// <param name="identifier">The ID or slug of the <see cref="Show"/>.</param>
		/// <param name="fields">The aditional fields to include in the result.</param>
		/// <returns>The studio that made the show.</returns>
		/// <response code="404">No show with the given ID or slug could be found.</response>
		[HttpGet("{identifier:id}/studio")]
		[PartialPermission(Kind.Read)]
		[ProducesResponseType(StatusCodes.Status200OK)]
		[ProducesResponseType(StatusCodes.Status404NotFound)]
		public async Task<ActionResult<Studio>> GetStudio(
			Identifier identifier,
			[FromQuery] Include<Studio> fields
		)
		{
			return await libraryManager.Studios.Get(
				identifier.IsContainedIn<Studio, Movie>(x => x.Movies!),
				fields
			);
		}

		/// <summary>
		/// Get collections containing this show
		/// </summary>
		/// <remarks>
		/// List the collections that contain this show.
		/// </remarks>
		/// <param name="identifier">The ID or slug of the <see cref="Movie"/>.</param>
		/// <param name="sortBy">A key to sort collections by.</param>
		/// <param name="filter">An optional list of filters.</param>
		/// <param name="pagination">The number of collections to return.</param>
		/// <param name="fields">The aditional fields to include in the result.</param>
		/// <returns>A page of collections.</returns>
		/// <response code="400">The filters or the sort parameters are invalid.</response>
		/// <response code="404">No show with the given ID or slug could be found.</response>
		[HttpGet("{identifier:id}/collections")]
		[HttpGet("{identifier:id}/collection", Order = AlternativeRoute)]
		[PartialPermission(Kind.Read)]
		[ProducesResponseType(StatusCodes.Status200OK)]
		[ProducesResponseType(StatusCodes.Status400BadRequest, Type = typeof(RequestError))]
		[ProducesResponseType(StatusCodes.Status404NotFound)]
		public async Task<ActionResult<Page<Collection>>> GetCollections(
			Identifier identifier,
			[FromQuery] Sort<Collection> sortBy,
			[FromQuery] Filter<Collection>? filter,
			[FromQuery] Pagination pagination,
			[FromQuery] Include<Collection> fields
		)
		{
			ICollection<Collection> resources = await libraryManager.Collections.GetAll(
				Filter.And(filter, identifier.IsContainedIn<Collection, Movie>(x => x.Movies)),
				sortBy,
				fields,
				pagination
			);

			if (
				!resources.Any()
				&& await libraryManager.Movies.GetOrDefault(identifier.IsSame<Movie>()) == null
			)
				return NotFound();
			return Page(resources, pagination.Limit);
		}

		/// <summary>
		/// Get watch status
		/// </summary>
		/// <remarks>
		/// Get when an item has been wathed and if it was watched.
		/// </remarks>
		/// <param name="identifier">The ID or slug of the <see cref="Movie"/>.</param>
		/// <returns>The status.</returns>
		/// <response code="204">This movie does not have a specific status.</response>
		/// <response code="404">No movie with the given ID or slug could be found.</response>
		[HttpGet("{identifier:id}/watchStatus")]
		[UserOnly]
		[ProducesResponseType(StatusCodes.Status200OK)]
		[ProducesResponseType(StatusCodes.Status204NoContent)]
		[ProducesResponseType(StatusCodes.Status404NotFound)]
		public async Task<MovieWatchStatus?> GetWatchStatus(Identifier identifier)
		{
			Guid id = await identifier.Match(
				id => Task.FromResult(id),
				async slug => (await libraryManager.Movies.Get(slug)).Id
			);
			return await libraryManager.WatchStatus.GetMovieStatus(id, User.GetIdOrThrow());
		}

		/// <summary>
		/// Set watch status
		/// </summary>
		/// <remarks>
		/// Set when an item has been wathed and if it was watched.
		/// </remarks>
		/// <param name="identifier">The ID or slug of the <see cref="Movie"/>.</param>
		/// <param name="status">The new watch status.</param>
		/// <param name="watchedTime">Where the user stopped watching.</param>
		/// <param name="percent">Where the user stopped watching (in percent).</param>
		/// <returns>The newly set status.</returns>
		/// <response code="200">The status has been set</response>
		/// <response code="204">The status was not considered impactfull enough to be saved (less then 5% of watched for example).</response>
		/// <response code="400">WatchedTime can't be specified if status is not watching.</response>
		/// <response code="404">No movie with the given ID or slug could be found.</response>
		[HttpPost("{identifier:id}/watchStatus")]
		[UserOnly]
		[ProducesResponseType(StatusCodes.Status200OK)]
		[ProducesResponseType(StatusCodes.Status204NoContent)]
		[ProducesResponseType(StatusCodes.Status400BadRequest)]
		[ProducesResponseType(StatusCodes.Status404NotFound)]
		public async Task<MovieWatchStatus?> SetWatchStatus(
			Identifier identifier,
			WatchStatus status,
			int? watchedTime,
			int? percent
		)
		{
			Guid id = await identifier.Match(
				id => Task.FromResult(id),
				async slug => (await libraryManager.Movies.Get(slug)).Id
			);
			return await libraryManager.WatchStatus.SetMovieStatus(
				id,
				User.GetIdOrThrow(),
				status,
				watchedTime,
				percent
			);
		}

		/// <summary>
		/// Delete watch status
		/// </summary>
		/// <remarks>
		/// Delete watch status (to rewatch for example).
		/// </remarks>
		/// <param name="identifier">The ID or slug of the <see cref="Movie"/>.</param>
		/// <returns>The newly set status.</returns>
		/// <response code="204">The status has been deleted.</response>
		/// <response code="404">No movie with the given ID or slug could be found.</response>
		[HttpDelete("{identifier:id}/watchStatus")]
		[UserOnly]
		[ProducesResponseType(StatusCodes.Status204NoContent)]
		[ProducesResponseType(StatusCodes.Status404NotFound)]
		public async Task DeleteWatchStatus(Identifier identifier)
		{
			Guid id = await identifier.Match(
				id => Task.FromResult(id),
				async slug => (await libraryManager.Movies.Get(slug)).Id
			);
			await libraryManager.WatchStatus.DeleteMovieStatus(id, User.GetIdOrThrow());
		}

		protected override async Task<(string path, string route)> GetPath(Identifier identifier)
		{
			string path = await identifier.Match(
				async id => (await Repository.Get(id)).Path,
				async slug => (await Repository.Get(slug)).Path
			);
			return (path, $"/movies/{identifier}");
		}
	}
}