using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Core.Utilities;
using TowerDefense.Towers.Placement;
using TowerDefense.Nodes;
using TowerDefense.Level;
using Core.Economy;
using TowerDefense.Towers;
using TowerDefense.UI.HUD;
using TowerDefense.Agents;

/// <summary>
/// 对战管理器，主要负责屏幕上方的敌方数据结构和相关的显示展示
/// 1: 放置塔防的区域。
/// 2: OppomentNodeList 对方Agent的刷新和行进路线。
/// 3: CurrencyMgr      对方的现金管理
/// 4: OpponentAI       对方的AI管理器，用于管理AI相关的内容，是升级，还是购买，还是其它相关。
/// 先做一个简单的功能，在开始之后，Opponent先后购买相关的Tower,然后OpponentAgent开始从对方
/// Node行进，直到最后死亡。
/// 
/// 先能刷新出来OpponentAgent再说下一步
/// </summary>
public class OpponentMgr : Singleton<OpponentMgr>
{
    protected static readonly int MAX_TOWER = 5;
    /// <summary>
    /// 用于对手刷新出来Agent相对应的数据
    /// </summary>
    public WaveManager m_WaveManager;

    /// <summary>
    /// 思考决策的时间间隔.
    /// </summary>
    public float thinkInternal = 0.5f;  // 改的时间很长是为了调试

    /// <summary>
    /// 放置塔防的IPlacementArea. Placement area ghost tower is currently on
    /// </summary>
    public IPlacementArea m_CurrentArea;

    /// <summary>
    /// 处理TowerList相关的数据.AI相关的内容也要
    /// </summary>
    protected List<Tower> m_listTower = new List<Tower>();

    protected List<int> m_waitBuyTowerPos = new List<int>();

    /// <summary>
    /// 对方Agent刷新的StartNode区域.
    /// </summary>
    protected Node m_StartNode;

    /// <summary>
    /// 对手的现金管理器
    /// </summary>
    protected Currency m_Currency;

    /// <summary>
    /// 是否已经开始刷怪
    /// </summary>
    protected bool bWaveStart = false;

    /// <summary>
    /// 用于内部判断是否触发智能的时间变量.
    /// </summary>
    protected float thinkTimeEle = 0;

    /// <summary>
    /// 当前空闲的塔位数目
    /// </summary>
    protected int freeTowerPos = 0;

    /// <summary>
    /// 每一个Tower对应的AttributeID.
    /// </summary>
    protected int[] towerAttributeID = new int[5];
    protected int[] towerLevel = new int[5];


    // 是否第一次，测试代码：
    protected static bool bFirst = true;


    public int startingCurrency { get; set; }

    public Currency currency
    {
        get { return this.m_Currency; }
    }

    // 待释放技能宝石队列
    private Queue<Tower> canReleaseSkillsQueue = new Queue<Tower>();

    // 可释放技能的怪物数量限制 >= 4 可释放
    private int agentQuantityLimit = 4;

    /// <summary>
    /// 设置每一条兵线对应的AttID
    /// </summary>
    /// <param name="waveline"></param>
    /// <param name="id"></param>
    public void SetTowerAttID(int waveline, int id, int lvl)
    {
        towerAttributeID[waveline] = id;
        towerLevel[waveline] = lvl;

        //if( lvl >=1 )
        this.UpdateWaveSpawn(waveline, id);
    }

    public int GetTowerAttID(int waveline)
    {
        return towerAttributeID[waveline];
    }
    public int GetTowerLevel(int waveline)
    {
        return towerLevel[waveline];
    }


    /// <summary>
    /// 增加一个Tower.
    /// </summary>
    /// <param name="tw"></param>
    public void addTower(Tower tw)
    {
        this.m_listTower.Add(tw);
    }

    /// <summary>
    /// 根据坐标获取对应的Tower指针.
    /// </summary>
    /// <param name="x"></param>
    /// <param name="y"></param>
    public Tower getTower(int x, int y)
    {
        foreach (Tower t in m_listTower)
        {
            if ((t.gridPosition.x == x) && (t.gridPosition.y == y)) return t;
        }
        return null;
    }

    /// <summary>
    /// 删除一个Tower.
    /// </summary>
    /// <param name="tw"></param>
    public void removeTower(Tower tw)
    {
        m_listTower.Remove(tw);
    }


    /// <summary>
    /// 更新刷怪时间.
    /// </summary>
    /// <param name="gridx"></param>
    /// <param name="attid"></param>
    protected void UpdateWaveSpawn(int gridx, int attid)
    {
        LevelManager.instance.waveManager.UpdateWaveSpawnTime(gridx, attid);
    }

    // 
    // Start is called before the first frame update
    void Start()
    {
        bFirst = true;
        bWaveStart = false;

        for (int ti = 0; ti < MAX_TOWER; ti++)
            towerAttributeID[ti] = 0;

        // 获取IPlaceArea.获取相应的放置区域。
        GameObject placeObj = GameObject.FindGameObjectWithTag("PlaceTowerOpponent");
        if (placeObj == null) return;
        m_CurrentArea = placeObj.GetComponent<IPlacementArea>();


        // 初始化全局的Starting Currency.
        startingCurrency = LevelManager.instance.startingCurrency;
        m_Currency = new Currency(startingCurrency);
        m_Currency.currencyChanged += M_Currency_currencyChanged;
        if (RandomTower.MAX_INTERNAL)
            this.thinkInternal = 1000;
    }

    public void ResetCurrency(int currency)
    {
        int curChg = currency - m_Currency.currentCurrency;
        m_Currency.AddCurrency(curChg);
    }

    private void M_Currency_currencyChanged()
    {
        //int cnum = m_Currency.currentCurrency;
        //Debug.Log("当前反方的现金数目是:" + cnum);
    }


    /*    float updateTime = 6.2f;
        protected void updateTest()
        {
            updateTime -= Time.deltaTime;
            if( updateTime <= 0 )
            {
                updateTime = 100;
                this.upgradeAttackTower(2);
            }
        }*/

    // Update is called once per frame
    void Update()
    {
        //if (!this.bWaveStart) return;
        if (!UIStart.bGameStart) return;

        // TEST CODE:
        // this.updateTest();

        this.thinkTimeEle += Time.deltaTime;
        if (thinkInternal > thinkTimeEle) return;
        thinkTimeEle -= thinkInternal;

        // 触发思考操作：加入一个随机的Tower.
        if (bFirst)
        {
            bFirst = false;
            RandomTower.instance.randomOpponentTower(false);

            this.currency.TryPurchase(TowerPrice.instance.opponentTowerPrice);
            TowerPrice.instance.onTowerBuySuccess();
        }

        // 更新开格子相关
        this.updateTowerPosBuy();

        // 触发升级Tower的操作.
        this.UpdateAttackTower();

        PurchaseTower();

        ReleaseSkills();
    }

    /// <summary>
    /// 购买产生塔
    /// </summary>
    private void PurchaseTower()
    {
        // 首先需要钱够
        if (currency.currentCurrency >= TowerPrice.instance.opponentTowerPrice)
        {
            // 如果还不能产生精灵宝石
            if (UIStart.instance.gameStartTime <= RandomTower.SKILL_TOWER_TIME)
            {
                if (freeTowerPos > 0 && m_CurrentArea.hasFreeAttackPos())
                {
                    --freeTowerPos;
                    RandomTower.instance.randomOpponentTower(false);
                }
            }
            else
            {
                // 先获取一个随机的宝石
                Tower newTower = RandomTower.instance.GetRandomTower(true, false);

                if (newTower.towerFeature == EFeatureTower.NULL && m_CurrentArea.hasFreeAttackPos())
                {
                    --freeTowerPos;
                    RandomTower.instance.RandomPlaceTower(newTower, true);
                }
                else
                {
                    // 技能宝石的话，直接购买，购买成功放入队列
                    int cost = TowerPrice.instance.opponentTowerPrice;
                    bool purchaseSuccess = OpponentMgr.instance.currency.TryPurchase(cost);

                    if (purchaseSuccess)
                        canReleaseSkillsQueue.Enqueue(newTower);
                }
            }
        }
    }

    /// <summary>
    /// AI 如果 有技能宝石 并且 某一条路线的怪物数量 >= 4 释放技能
    /// </summary>
    private void ReleaseSkills()
    {
        if (canReleaseSkillsQueue.Count == 0)
            return;

        WaveLineAgentInsMgr[] waveLineList = AgentInsManager.instance.getOppoWaveLineList();
        int index = -1;

        // 找某一条兵线怪物数量 >= 4 的
        for (int i = 0; i < waveLineList.Length; ++i)
        {
            int num = waveLineList[i].getAgentInsNum();

            if (num >= agentQuantityLimit)
            {
                index = i;
                break;
            }
        }

        if (index == -1) return;

        Tower tower = canReleaseSkillsQueue.Dequeue();
        int attributeId = tower.attributeId;
        int level = tower.currentLevel;

        if (tower.towerFeature == EFeatureTower.Skill_Fire)
        {
            // 火，列攻击，直接在该兵线释放
            WaveLineOpponentManager.instance.PlayWaveLineEffect(index);
            AgentInsManager.instance.ExecWavelineAttack(index, attributeId, level, true);
        }
        else if (tower.towerFeature == EFeatureTower.Skill_Bomb)
        {
            // 控制，技能中心为离塔最近的小怪的中心点
            Agent agent = AgentInsManager.instance.GetMinDisAgent(index, true);
            WaveLineOpponentManager.instance.PlayBattleAreaBombEffect(agent.transform.position);
            AgentInsManager.instance.ExecBombAttack(agent.transform.position, attributeId, level, true);
        }
    }

    /// <summary>
    /// 更新火属性Tower对左右塔的攻击增加.
    /// </summary>
    protected void updateFireTowerAttRise()
    {
        for (int ti = 0; ti < MAX_TOWER; ti++)
        {
            Tower tw = this.getTower(ti, 0);
            if (tw)
                tw.attackRise = 0.0f;
        }

        for (int ti = 0; ti < MAX_TOWER; ti++)
        {
            Tower tw = this.getTower(ti, 0);
            if (tw.towerFeature == EFeatureTower.LightTower)
            {
                int nidx = ti - 1;
                if (nidx >= 0)
                {
                    tw = getTower(nidx, 0);
                    if (tw)
                        tw.attackRise = 0.1f;
                }
                nidx = ti + 1;
                if (nidx < MAX_TOWER)
                {
                    tw = getTower(nidx, 0);
                    if (tw)
                        tw.attackRise = 0.1f;
                }
            }
        }
    }


    /// <summary>
    /// 更新AI开格子逻辑.
    /// </summary>
    protected void updateTowerPosBuy()
    {
        if (m_waitBuyTowerPos.Count > 0)
        {
            if (currency.currentCurrency >= TowerPlacementGrid.GRID_OPENCASH_OPPO)
            {
                m_CurrentArea.buyWaitBuyGrid(m_waitBuyTowerPos[0], 0);
                m_waitBuyTowerPos.RemoveAt(0);
            }
        }
        else
        {
            if (currency.currentCurrency >= TowerPlacementGrid.GRID_OPENCASH_OPPO)
            {
                if (m_CurrentArea.isWaitBuyGrid(1, 0))
                {
                    m_CurrentArea.buyWaitBuyGrid(1, 0);
                    freeTowerPos++;
                }
                else if (m_CurrentArea.isWaitBuyGrid(3, 0))
                {
                    m_CurrentArea.buyWaitBuyGrid(3, 0);
                    freeTowerPos++;
                }
                else if (m_CurrentArea.isWaitBuyGrid(0, 0))
                {
                    m_CurrentArea.buyWaitBuyGrid(0, 0);
                    freeTowerPos++;
                }
                else if (m_CurrentArea.isWaitBuyGrid(4, 0))
                {
                    m_CurrentArea.buyWaitBuyGrid(4, 0);
                    freeTowerPos++;
                }
            }
        }

        return;
    }

    /// <summary>
    /// 反方攻击塔位的升级逻辑更新,暂时根据场内小怪数目使用简单的逻辑。
    /// </summary>
    protected void UpdateAttackTower()
    {
        WaveLineAgentInsMgr[] waveLineList = AgentInsManager.instance.getOppoWaveLineList();

        for (int ti = 0; ti < waveLineList.Length; ti++)
        {
            int agentNum = waveLineList[ti].getAgentInsNum();

            Tower tower = this.getTower(ti, 0);
            if (!tower) continue;
            int lvl = tower.currentLevel;
            if (lvl >= Tower.MAX_LEVEL)
                continue;
            if ((agentNum - 1) <= lvl) continue;

            // 塔位升级相关的数据:
            if (tower.towerFeature != EFeatureTower.GrowUp)
            {
                if ((lvl == 0) && (currency.TryPurchase(80)))
                {
                    this.upgradeAttackTower(ti);
                }
                else if ((lvl == 1) && (currency.TryPurchase(240)))
                {
                    this.upgradeAttackTower(ti);
                }
                else if ((lvl == 2) && (currency.TryPurchase(440)))
                {
                    this.upgradeAttackTower(ti);
                }
            }

        }
    }


    /// <summary>
    /// 升级某一个攻击位的Tower.
    /// </summary>
    /// <param name="x"></param>
    protected void upgradeAttackTower(int xpos)
    {
        Tower newTower = RandomTower.instance.GetRandomTower(true, true);
        Tower oldTower = this.getTower(xpos, 0);
        if (oldTower == null) return;

        GameUI.instance.DisplaceTower(newTower, oldTower);

    }

    /// <summary>
    /// 开启某一个等待购买的塔位。
    /// </summary>
    /// <param name="x"></param>
    /// <returns></returns>
    public bool openWaitBuyGrid(int x)
    {
        if (null == this.m_CurrentArea) return false;
        if (m_CurrentArea.isWaitBuyGrid(x, 0))
        {
            if (currency.currentCurrency < TowerPlacementGrid.GRID_OPENCASH_OPPO)
            {
                m_waitBuyTowerPos.Add(x);
                return true;
            }
            return m_CurrentArea.buyWaitBuyGrid(x, 0);
        }
        else
            return true;
    }

    /// <summary>
    /// 开始Wave移动
    /// </summary>
    public void StartWaves()
    {
        this.bWaveStart = true;
        m_WaveManager.StartWaves();
    }

    /// <summary>
    /// 开启一条兵线.
    /// </summary>
    /// <param name="x"></param>
    public void startWaveLine(int x, int attid)
    {
        m_WaveManager.startWaveLine(x, attid);
        if (m_CurrentArea.isWaitBuyGrid(x, 0))
        {
            openWaitBuyGrid(x);
            freeTowerPos++;
        }
    }

    public void prepareWaveline(int x)
    {
        m_WaveManager.prepareWaveline(x);
    }

    /// <summary>
    /// 停止某一条兵线的出兵。
    /// </summary>
    /// <param name="x"></param>
    public void stopWaveLine(int x)
    {
        m_WaveManager.stopWaveLine(x);
    }
}