using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using MafiaTelegramBot.Game;
using MafiaTelegramBot.Game.GameRooms;
using MafiaTelegramBot.Resources;

namespace MafiaTelegramBot.Controllers
{
    public static class RoomController
    {
        private static readonly Dictionary<string, GameRoom> OpenedGames = new();

        public static async Task<ResultCode> CreateNewGame(Player creator, string roomName, bool isExtended, bool isPrivate, bool isRanking)
        {
            return await Task.Run(() =>
            {
                var roomKey = RoomEncrypter.GetCode(roomName);
                if (OpenedGames.ContainsKey(roomKey)) return ResultCode.GameAlreadyExists;
                if (!creator.SetRoomName(roomName)) return ResultCode.UserAlreadyInGame;
                GameRoom room = isExtended
                    ? new ExtendedGameRoom {Owner = creator, RoomName = roomName, IsPrivate = isPrivate, IsRanking = isRanking}
                    : new NormalGameRoom {Owner = creator, RoomName = roomName, IsPrivate = isPrivate, IsRanking = isRanking};
                OpenedGames.Add(roomKey, room);
                room.Players.Add(creator.Id, creator);
                
                room.SetTimer();
                
                return ResultCode.CodeOk;
            });
        }

        public static async Task<ResultCode> ConnectToGame(Player player, string roomKey)
        {
            return await Task.Run(async () =>
            {
                if (!OpenedGames.ContainsKey(roomKey)) return ResultCode.RoomDoesNotExist;
                var roomName = RoomEncrypter.GetName(roomKey);
                if (OpenedGames[roomKey].IsRunning) return ResultCode.GameAlreadyRunning;
                if (OpenedGames[roomKey].IsFilled()) return ResultCode.RoomIsFilled;
                if (!player.SetRoomName(roomName)) return ResultCode.UserAlreadyInGame;
                OpenedGames[roomKey].Players.Add(player.Id, player);

                if (OpenedGames[roomKey].Players.Count > Constants.MEMORY_CLEANER_PLAYERS_COUNT) OpenedGames[roomKey].StopTimer();
                
                await OpenedGames[roomKey].PlayersMessageChannel.SendExcept(player.Id, $"{player.NickName} {strings.connected_to_game}");
                OpenedGames[roomKey].PlayersMessageChannel.AddPerson(player.ChatId);
                return ResultCode.CodeOk;
            });
        }

        public static List<Player> GetPlayers(string roomKey)
        {
                return OpenedGames[roomKey].Players.Values.ToList();
        }
        
        public static async Task<ResultCode> LeaveFromGame(Player player)
        {
            return await Task.Run(async () =>
            {
                var roomName = player.GetRoomName();
                var roomKey = RoomEncrypter.GetCode(roomName);
                if (!player.RemoveGame()) return ResultCode.UserNotInGame;
                await OpenedGames[roomKey].Leave(player);
                if (!OpenedGames[roomKey].IsRunning &&
                    OpenedGames[roomKey].Players.Count <= Constants.MEMORY_CLEANER_INTERVAL)
                    OpenedGames[roomKey].StartTimer();
                if (OpenedGames[roomKey].Players.Count >= 0) return ResultCode.CodeOk;
                RoomEncrypter.RemoveCode(roomName);
                OpenedGames.Remove(roomKey);
                return ResultCode.CodeOk;
            });
        }
        
        public static async Task DissolveRoom(string roomKey)
        {
            await Task.Run(async () =>
            {
                if (OpenedGames.ContainsKey(roomKey))
                {
                    foreach (var player in OpenedGames[roomKey].Players.Values)
                    {
                        await OpenedGames[roomKey].PlayersMessageChannel.SendTo(player.Id, strings.room_dissolved,
                            player.IsAdmin ? Keyboard.AdminMainMenu : Keyboard.MainMenu);
                        player.RemoveGame();
                        player.ResetState();
                    }
                    RoomEncrypter.RemoveCode(OpenedGames[roomKey].RoomName);
                    OpenedGames[roomKey].DeleteTimer();
                    OpenedGames.Remove(roomKey);
                }
            });
        }

        public static async Task<List<GameRoom>> GetPublicNotRankedRooms()
        {
            return await Task.Run(() =>
            {
                async Task<int> Comparison(GameRoom room, GameRoom room2)
                {
                    var first = await room.GetCapacity() / (double) await room.GetMaximum();
                    var second = await room2.GetCapacity() / (double) await room2.GetMaximum();
                    return second > first ? 1 : 0;
                }

                var rooms = OpenedGames.Values
                    .Where(room => !room.IsPrivate && !room.IsFilled() && !room.IsRunning && !room.IsRanking).
                    ToList();
                rooms.Sort((room, room2) => Comparison(room, room2).Result);
                return rooms;
            });
        }

        public static async Task<List<GameRoom>> GetPublicRankedRooms(char rank)
        {
            return await Task.Run(() =>
            {
                async Task<int> Comparison(GameRoom room, GameRoom room2)
                {
                    var first = await room.GetCapacity() / (double) await room.GetMaximum();
                    var second = await room2.GetCapacity() / (double) await room2.GetMaximum();
                    return second > first ? 1 : 0;
                }

                bool IsNeighborRank(char roomRank, char playerRank)
                {
                    return roomRank - playerRank > -2 && roomRank - playerRank < 2;
                }
                
                var rooms = OpenedGames.Values
                    .Where(room => !room.IsPrivate && !room.IsFilled() && !room.IsRunning
                                   && room.IsRanking && IsNeighborRank(room.GetRoomRank().Result, rank)).
                    ToList();
                rooms.Sort((room, room2) => Comparison(room, room2).Result);
                return rooms;
            });
        }
        
        public static GameRoom GetRoom(string roomKey)
        {
            return OpenedGames[roomKey];
        }
    }
}