using Gameboard.ShogiUI.Sockets.Managers;
using Gameboard.ShogiUI.Sockets.Repositories;
using Gameboard.ShogiUI.Sockets.ServiceModels.Api;
using Gameboard.ShogiUI.Sockets.ServiceModels.Socket;
using Gameboard.ShogiUI.Sockets.ServiceModels.Types;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading.Tasks;

namespace Gameboard.ShogiUI.Sockets.Controllers
{

	[ApiController]
	[Route("[controller]")]
	[Authorize(Roles = "Shogi")]
	public class GameController : ControllerBase
	{
		private readonly IGameboardManager gameboardManager;
		private readonly IGameboardRepository gameboardRepository;
		private readonly ISocketConnectionManager communicationManager;
		private readonly IModelMapper mapper;

		public GameController(
			IGameboardRepository repository,
			IGameboardManager manager,
			ISocketConnectionManager communicationManager,
			IModelMapper mapper)
		{
			gameboardManager = manager;
			gameboardRepository = repository;
			this.communicationManager = communicationManager;
			this.mapper = mapper;
		}

		[HttpPost("JoinCode")]
		public async Task<IActionResult> PostGameInvitation([FromBody] PostGameInvitation request)
		{

			//var isPlayer1 = await gameboardManager.IsPlayer1(request.SessionName, userName);
			//if (isPlayer1)
			//{
			//  var code = await gameboardRepository.PostJoinCode(request.SessionName, userName);
			//  return new CreatedResult("", new PostGameInvitationResponse(code));
			//}
			//else
			//{
			return new UnauthorizedResult();
			//}
		}

		[AllowAnonymous]
		[HttpPost("GuestJoinCode")]
		public async Task<IActionResult> PostGuestGameInvitation([FromBody] PostGuestGameInvitation request)
		{

			//var isGuest = gameboardManager.IsGuest(request.GuestId);
			//var isPlayer1 = gameboardManager.IsPlayer1(request.SessionName, request.GuestId);
			//if (isGuest && await isPlayer1)
			//{
			//  var code = await gameboardRepository.PostJoinCode(request.SessionName, request.GuestId);
			//  return new CreatedResult("", new PostGameInvitationResponse(code));
			//}
			//else
			//{
			return new UnauthorizedResult();
			//}
		}

		[HttpPost("{gameName}/Move")]
		public async Task<IActionResult> PostMove([FromRoute] string gameName, [FromBody] PostMove request)
		{
			var user = await gameboardManager.ReadUser(User);
			var session = await gameboardRepository.ReadSession(gameName);
			if (session == null)
			{
				return NotFound();
			}
			if (user == null || (session.Player1Name != user.Id && session.Player2Name != user.Id))
			{
				return Forbid("User is not seated at this game.");
			}

			try
			{
				var move = request.Move;
				if (move.PieceFromCaptured.HasValue)
					session.Move(mapper.Map(move.PieceFromCaptured.Value), move.To);
				else if (!string.IsNullOrWhiteSpace(move.From))
					session.Move(move.From, move.To, move.IsPromotion);

				await gameboardRepository.CreateBoardState(session);
				await communicationManager.BroadcastToPlayers(
					new MoveResponse
					{
						GameName = session.Name,
						PlayerName = user.Id
					},
					session.Player1Name,
					session.Player2Name);

				return Ok();
			}
			catch (InvalidOperationException ex)
			{
				return Conflict(ex.Message);
			}
		}

		// TODO: Use JWT tokens for guests so they can authenticate and use API routes, too.
		//[Route("")]
		//public async Task<IActionResult> PostSession([FromBody] PostSession request)
		//{
		//  var model = new Models.Session(request.Name, request.IsPrivate, request.Player1, request.Player2);
		//  var success = await repository.CreateSession(model);
		//  if (success)
		//  {
		//    var message = new ServiceModels.Socket.Messages.CreateGameResponse(ServiceModels.Types.ClientAction.CreateGame)
		//    {
		//      Game = model.ToServiceModel(),
		//      PlayerName =           
		//    }
		//    var task = request.IsPrivate
		//      ? communicationManager.BroadcastToPlayers(response, userName)
		//      : communicationManager.BroadcastToAll(response);
		//    return new CreatedResult("", null);
		//  }
		//  return new ConflictResult();
		//}

		[HttpPost]
		public async Task<IActionResult> PostSession([FromBody] PostSession request)
		{
			var user = await ReadUserOrThrow();
			var session = new Shogi.Domain.SessionMetadata(request.Name, request.IsPrivate, user.Id);
			await gameboardRepository.CreateSession(session);
			await communicationManager.BroadcastToAll(new CreateGameResponse
			{
				Game = mapper.Map(session),
				PlayerName = user.Id
			});

			return Ok();

		}

		/// <summary>
		/// Reads the board session and subscribes the caller to socket events for that session.
		/// </summary>
		[HttpGet("{gameName}")]
		public async Task<IActionResult> GetSession([FromRoute] string gameName)
		{
			var user = await ReadUserOrThrow();
			var session = await gameboardRepository.ReadSession(gameName);
			if (session == null)
			{
				return NotFound();
			}

			var playerPerspective = session.Player2Name == user.Id
				? WhichPlayer.Player2
				: WhichPlayer.Player1;

			var response = new Session
			{
				BoardState = new BoardState
				{
					Board = mapper.Map(session.BoardState),
					Player1Hand = session.Player1Hand.Select(mapper.Map).ToList(),
					Player2Hand = session.Player2Hand.Select(mapper.Map).ToList(),
					PlayerInCheck = mapper.Map(session.InCheck)
				},
				GameName = session.Name,
				Player1 = session.Player1Name,
				Player2 = session.Player2Name
			};
			return Ok(response);
		}

		[HttpGet]
		public async Task<GetSessionsResponse> GetSessions()
		{
			var user = await ReadUserOrThrow();
			var sessions = await gameboardRepository.ReadSessionMetadatas();

			var sessionsJoinedByUser = sessions
				.Where(s => s.IsSeated(user.Id))
				.Select(s => mapper.Map(s))
				.ToList();
			var sessionsNotJoinedByUser = sessions
				.Where(s => !s.IsSeated(user.Id))
				.Select(s => mapper.Map(s))
				.ToList();

			return new GetSessionsResponse
			{
				PlayerHasJoinedSessions = sessionsJoinedByUser,
				AllOtherSessions = sessionsNotJoinedByUser
			};
		}

		[HttpPut("{gameName}")]
		public async Task<IActionResult> PutJoinSession([FromRoute] string gameName)
		{
			var user = await ReadUserOrThrow();
			var session = await gameboardRepository.ReadSessionMetaData(gameName);
			if (session == null)
			{
				return NotFound();
			}
			if (session.Player2 != null)
			{
				return this.Conflict("This session already has two seated players and is full.");
			}

			session.SetPlayer2(user.Id);
			await gameboardRepository.UpdateSession(session);

			var opponentName = user.Id == session.Player1
				? session.Player2!
				: session.Player1;
			await communicationManager.BroadcastToPlayers(new JoinGameResponse
			{
				GameName = session.Name,
				PlayerName = user.Id
			}, opponentName);
			return Ok();
		}

		[Authorize(Roles = "Admin, Shogi")]
		[HttpDelete("{gameName}")]
		public async Task<IActionResult> DeleteSession([FromRoute] string gameName)
		{
			var user = await ReadUserOrThrow();
			if (user.IsAdmin)
			{
				return Ok();
			}
			else
			{
				return Unauthorized();
			}
		}

		private async Task<Models.User> ReadUserOrThrow()
		{
			var user = await gameboardManager.ReadUser(User);
			if (user == null)
			{
				throw new UnauthorizedAccessException("Unknown user claims.");
			}
			return user;
		}
	}
}