using GameHandler.Extensions;
using GameModel;
using GameModel.Exceptions;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using GameHandler.GameHandler;
using GameHandler.Parser;
using GameModel.Contract;
using GameModel.DeathGame;
using GameModel.Contracts;
using System.Data;
using Autofac.Core;
using Autofac;
using static System.Formats.Asn1.AsnWriter;

namespace GameHandler
{
    public class GameService
    {
        private IContainer _container { get; set; }
        private bool _isStarted = false;
        private ILifetimeScope _scope;
        private IGameHandler _gh;
        private ThrowHandler _th;
        private ExpenseHandler _eh;
        private GameState _lastState;
        public GameState GameModel { get => _lastState; }

        private IExpenseRepository _expenseRepository { get => _scope.Resolve<IExpenseRepository>(); }

        public GameService(IContainer container =null)
        {
            _container = container;
        }

        public string ThrowModeName
        {
            get
            {
                if (_lastState != null)
                {
                    return _lastState.ThrowState.BoardState.ThrowMode == ThrowMode.Decrease ? "Abräumen" : "Volle";
                }
                return string.Empty;
            }
        }

        static int[] defaultPlayerIds => new[] {1,2,3,4};

        public GameState Start(string gameName = FreeGameHandler.GAMENAME_FREETRAINING) 
        {
            return Start(defaultPlayerIds, new DeathGameSettings(6), gameName);
        }

        public GameState Start(int[] playerIds, IGameSettings gameSettings, string gameName = FreeGameHandler.GAMENAME_FREETRAINING) 
        {
            if (_isStarted)
            {
                throw new InvalidGameStateExcpetion("Game already started");
            }
            _isStarted = true;

            _scope = _container?.BeginLifetimeScope();
            _gh = this.GetGameHandler(gameName);
            var gm = _gh.InitGameModel(playerIds, gameSettings);

            _th = new ThrowHandler();
            _eh = new ExpenseHandler(_expenseRepository);
            
            var throwState = ThrowState.Create(_gh.ThrowMode(), _gh.ThrowsPerRount());
            _lastState = GameState.Create(throwState, _gh.GetCurrentPlayerId(gm), gm, ExpenseModel.Create());

            return _lastState;
            
        }

        public GameState HandleThrow(PinThrow pinThrow)
        {
            if (!_isStarted)
            {
                throw new InvalidGameStateExcpetion("Game not started");
            }

            var boardStateBeforeUpdate = _lastState.ThrowState.BoardState;

            pinThrow = AutoCompletePlayerId(pinThrow);

            var throwState = _th.Update(_lastState.ThrowState, pinThrow);
            var gameModel = _gh.Update(pinThrow, _lastState.GameModel, boardStateBeforeUpdate);
            var expenseModel = _eh.CheckThrow(throwState.BoardState, pinThrow, gameModel.PlayerIds, _lastState.ExpenseModel);            

            _lastState = _lastState with { ThrowState = throwState, GameModel = gameModel, NextPlayerId = _gh.GetCurrentPlayerId(gameModel), ExpenseModel = expenseModel };
            return _lastState ;
        }

        private PinThrow AutoCompletePlayerId(PinThrow pinThrow)
        {
            if (_gh.FreePlayerSelection() && pinThrow.PlayerId == 0)
            {
                throw new InvalidPinThrowException("PlayerId connot be 0");
            }

            if (_gh.FreePlayerSelection())
            {
                return pinThrow;
            }
                        
            return pinThrow with { PlayerId = _gh.GetCurrentPlayerId(_lastState.GameModel) };
        }

        public void Stop()
        {
            if (!_isStarted)
            {
                throw new InvalidGameStateExcpetion("Game not started");
            }
            _isStarted = false;

            _scope?.Dispose();
        }

        public ThrowCommandData ParseThrowData(string stringData)
        {
            return ThrowCommandParser.Parse(stringData, _gh.FreePlayerSelection(), 0);
        }

        public bool FreePlayerSelection => _gh.FreePlayerSelection();
    }
}