using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UI.ActivityHuaRongDao;
using FairyGUI;

namespace GFGGame
{
    public class ActivityHuaRongDaoView : BaseWindow
    {
        private UI_ActivityHuaRongDaoUI _ui;
        public class Grid
        {
            public Vector2 pos;
            public int num;
        }

        private Grid[,] _gridArr;
        private readonly int _gridNum = 3;
        private List<GObject> _items;
        private bool _gameStart;
        private HuarongRoadGame cfg;

        public override void Dispose()
        {
            if (_ui != null)
            {
                _ui.Dispose();
                _ui = null;
            }
            base.Dispose();

        }

        protected override void OnInit()
        {
            base.OnInit();
            packageName = UI_ActivityHuaRongDaoUI.PACKAGE_NAME;
            _ui = UI_ActivityHuaRongDaoUI.Create();
            viewCom = _ui.target;
            viewCom.Center();
            isReturnView = true;
            modal = true;

            _ui.m_item.target.visible = false;
            _ui.m_btnBack.onClick.Add(OnBtnBackClick);

            InitGridInfo();
            CreateItems();

        }

        protected override void OnShown()
        {
            base.OnShown();

            cfg = (HuarongRoadGame)viewData;
            SetGridInfo();
            InitItems();
            _gameStart = false;
            ResetCountdown();
            Countdown(null);
            Timers.inst.Add(1, 0, Countdown);
        }

        protected override void OnHide()
        {
            base.OnHide();
        }

        /// <summary>
        /// 初始化所有格子的信息
        /// </summary>
        private void InitGridInfo()
        {
            _gridArr = new Grid[_gridNum, _gridNum];
            _items = new List<GObject>();

            for (int i = 0; i < _gridNum; i++)
            {
                for (int j = 0; j < _gridNum; j++)
                {
                    _gridArr[i, j] = new Grid();
                }
            }

        }

        private void SetGridInfo()
        {
            //List<int> numList = GetRandomArr(1, 8);
            List<int> numList = GetArrByConfigStep(cfg.step);
            Vector2 originPos = _ui.m_item.target.position;

            for (int i = 0; i < _gridNum; i++)
            {
                for (int j = 0; j < _gridNum; j++)
                {
                    _gridArr[i, j].num = numList[i * _gridNum + j];
                    _gridArr[i, j].pos = originPos + new Vector2(j * _ui.m_item.target.width, i * _ui.m_item.target.height);
                }
            }
        }

        /// <summary>
        /// 随机排序 min~max 连续的数字
        /// </summary>
        /// <param name="min"></param>
        /// <param name="max"></param>
        /// <returns></returns>
        private List<int> GetRandomArr(int min, int max)
        {
            List<int> list = new List<int>();
            for (int i = min; i <= max; i++)
            {
                list.Add(i);
            }

            System.Random r = new System.Random();
            for (int i = 0; i < list.Count; i++)
            {
                int index = r.Next(list.Count);
                int temp = list[index];
                list[index] = list[i];
                list[i] = temp;
            }

            // 最后一个是空的
            list.Add(0);

            return list;
        }

        /// <summary>
        /// 根据配置步数打乱数组
        /// </summary>
        /// <param name="configStep"></param>
        /// <returns></returns>
        private List<int> GetArrByConfigStep(int configStep)
        {
            List<int> list = new List<int>();
            for (int i = 1; i <= 8; i++)
            {
                list.Add(i);
            }
            // 最后一个是空的
            list.Add(0);

            int num = 0;
            Vector2 zeroPos = new Vector2(2, 2);
            Vector2[] dirArr = { new Vector2(-1, 0), new Vector2(1, 0), new Vector2(0, -1), new Vector2(0, 1) };
            Vector2 lastPos = zeroPos;
            while (num < configStep)
            {
                int n = Random.Range(0, 4);
                Vector2 tempPos = zeroPos + dirArr[n];
                if (tempPos != lastPos && tempPos.x >= 0 && tempPos.y >= 0 && tempPos.x < _gridNum && tempPos.y < _gridNum)
                {
                    list[(int)zeroPos.x * _gridNum + (int)zeroPos.y] = list[(int)tempPos.x * _gridNum + (int)tempPos.y];
                    list[(int)tempPos.x * _gridNum + (int)tempPos.y] = 0;

                    lastPos = zeroPos;
                    zeroPos = tempPos;
                }
                ++num;
            }
            return list;
        }

        private void InitItems()
        {
            int itemIndex = 0;
            for (int i = 0; i < _gridNum; i++)
            {
                for (int j = 0; j < _gridNum; j++)
                {
                    // 空格不用放item
                    if (_gridArr[i, j].num == 0)
                    {
                        continue;
                    }

                    _items[itemIndex].position = _gridArr[i, j].pos;
                    UI_item item = UI_item.Proxy(_items[itemIndex]);
                    item.m_index.text = _gridArr[i, j].num.ToString();
                    _items[itemIndex].data = _gridArr[i, j].num;
                    UI_item.ProxyEnd();
                    ++itemIndex;
                }
            }
        }

        /// <summary>
        /// 创建可移动的实体
        /// </summary>
        private void CreateItems()
        {
            for (int i = 1; i <= _gridNum * _gridNum - 1; i++)
            {
                GObject gObject = UIPackage.CreateObject("ActivityHuaRongDao", "item");
                gObject.name = "item" + i;
                gObject.onClick.Add(OnItemClick);
                _ui.m_items.target.AddChild(gObject);
                _items.Add(gObject);
            }
        }

        private void OnItemClick(EventContext eventContext)
        {
            GObject obj = eventContext.sender as GObject;
            int num = (int)obj.data;
            Grid newGrid = CheckCanMove(num);
            if (newGrid != null)
            {
                _ui.m_items.target.touchable = false;
                obj.TweenMove(newGrid.pos, 0.1f).OnComplete(()=>
                {
                    _ui.m_items.target.touchable = true;
                    CheckWin();
                });
            }
        }

        private Grid CheckCanMove(int num)
        {
            int indexX = 0;
            int indexY = 0;

            // 找到格子
            for (int i = 0; i < _gridNum; i++)
            {
                for (int j = 0; j < _gridNum; j++)
                {
                    if (_gridArr[i, j].num == num)
                    {
                        indexX = i;
                        indexY = j;
                        break;
                    }
                }
            }

            // 判断格子四个方向是否有空格
            if (CheckHaveNullGrid(indexX - 1, indexY) || CheckHaveNullGrid(indexX, indexY - 1)
                || CheckHaveNullGrid(indexX + 1, indexY) || CheckHaveNullGrid(indexX, indexY + 1))
            {
                return UpdateGridInfo(num);
            }

            return null;
        }

        private bool CheckHaveNullGrid(int indexX, int indexY)
        {
            if (indexX >= 0 && indexX < _gridNum)
            {
                if (indexY >= 0 && indexY < _gridNum)
                {
                    return _gridArr[indexX, indexY].num == 0;
                }
            }

            return false;
        }

        private Grid UpdateGridInfo(int num)
        {
            Vector2 nullGridindex = new Vector2(-1, 0);
            Vector2 numGridindex = new Vector2(-1, 0);


            for (int i = 0; i < _gridNum; i++)
            {
                for (int j = 0; j < _gridNum; j++)
                {
                    if (_gridArr[i, j].num == num)
                    {
                        numGridindex = new Vector2(i, j);
                    }
                    else if (_gridArr[i, j].num == 0)
                    {
                        nullGridindex = new Vector2(i, j);
                    }
                    if (numGridindex.x != -1 && nullGridindex.x != -1)
                    {
                        break;
                    }
                }
            }

            _gridArr[(int)numGridindex.x, (int)numGridindex.y].num = 0;
            _gridArr[(int)nullGridindex.x, (int)nullGridindex.y].num = num;

            return _gridArr[(int)nullGridindex.x, (int)nullGridindex.y];
        }

        private void CheckWin()
        {
            int num = 0;
            for (int i = 0; i < _gridNum; i++)
            {
                for (int j = 0; j < _gridNum; j++)
                {
                    if (i == 0 && j == 0)
                    {
                        num = _gridArr[i, j].num;
                        if(num != 1)
                        {
                            return;
                        }
                    }
                    else
                    {
                        // 不连续 没有胜利
                        if (_gridArr[i, j].num != num + 1)
                        {
                            return;
                        }
                        // 继续检测
                        else
                        {
                            ++num;
                            // 胜利
                            if (num == _gridNum * _gridNum - 1)
                            {
                                // 关卡推进
                                int passLevel = cfg.resArr[0];
                                ActivityHuaRongDaoEntryView.curLevel = Mathf.Max(passLevel, ActivityHuaRongDaoEntryView.curLevel);
                                EventAgent.DispatchEvent(ConstMessage.ACTIVITY_HUARONGDAO_UPDATE);
                                // 弹出成功界面
                                ViewManager.Show<ActivityHuaRongDaoSuccessView>(cfg);
                            }
                        }
                    }

                }
            }
        }

        private int countDownNum;
        private void Countdown(object param)
        {
            _ui.m_seconds.text = countDownNum.ToString();
            --countDownNum;

            if (countDownNum < 0)
            {
                _ui.m_tips.visible = false;
                Timers.inst.Remove(Countdown);
                _gameStart = true;
                return;
            }
        }

        private void ResetCountdown()
        {
            countDownNum = 3;
            _ui.m_tips.visible = true;
            Timers.inst.Remove(Countdown);
        }

        private void OnBtnBackClick()
        {
            if (_gameStart)
            {
                AlertUI.Show("退出游戏不保存进度，不扣除任何次数和道具，是否退出？")
                           .SetLeftButton(true, "返回游戏")
                           .SetRightButton(true, "仍要退出", (obj) =>
                           {
                               Hide();
                           });
            }
            else
            {
                Hide();
            }
        }
    }
}