using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class GroupManager : MonoBehaviour
{
    public Action DelSoldierDie;
    public Action DelSoldierClear;

    public int SoldierCount => mSoldierCount;
    public int TotalDamage => mTotalDamage;

    protected Dictionary<int, List<SoldierUnit>> mSoldierGroupDic;
    protected List<SoldierUnit> mSoldierList;
    protected int mSoldierCount = 0;

    protected int mTotalDamage = 0;

    private void Awake()
    {
        mSoldierGroupDic = new Dictionary<int, List<SoldierUnit>>();
        mSoldierList = new List<SoldierUnit>();
    }

    public virtual void Init()
    {
        
    }

    public WarUnit GetNearestTarget(Vector3 pRefPos, float pLimit = -1)
    {
        WarUnit tNearestUnit = null;

        float tMinDisSqr = float.MaxValue;
        float tCurDisSqr = 0;
        Vector3 tTargetPos = Vector3.zero;

        for (int i = 0; i < mSoldierList.Count; i++)
        {
            if (!mSoldierList[i].IsDead)
            {
                tTargetPos = mSoldierList[i].RelativePos(pRefPos);
                tCurDisSqr = Mathf.Min(Mathf.Abs(tTargetPos.x - pRefPos.x), Mathf.Abs(tTargetPos.y - pRefPos.y));
                if (pLimit > 0 && pLimit < tCurDisSqr )
                    continue;

                tCurDisSqr = (pRefPos - tTargetPos).sqrMagnitude;
                if (pLimit > 0 && (pLimit * pLimit) < tCurDisSqr)
                    continue;

                if (tCurDisSqr < tMinDisSqr)
                {
                    tMinDisSqr = tCurDisSqr;
                    tNearestUnit = mSoldierList[i];
                }
            }
        }

        return tNearestUnit;
    }

    public virtual void AddSoldier(SoldierUnit pUnit, GroupManager pAgainstGroup)
    {

    }

    protected void AddSoldier(SoldierUnit pUnit)
    {
        pUnit.DelDie = OnSoldierDie;
        pUnit.DelHurt = OnSoldierHurt;
        pUnit.DelSplash = OnSoldierSplash;

        if (!mSoldierGroupDic.ContainsKey(pUnit.GroupID))
        {
            mSoldierGroupDic[pUnit.GroupID] = new List<SoldierUnit>();
        }

        if(!mSoldierGroupDic[pUnit.GroupID].Contains(pUnit))
        {
            mSoldierGroupDic[pUnit.GroupID].Add(pUnit);
        }

        mSoldierList.Add(pUnit);
        mSoldierCount++;
    }

    protected virtual void HandleSoldierClear()
    {

    }

    private void OnSoldierDie(WarUnit pUnit)
    {
        if (mSoldierList.Contains(pUnit as SoldierUnit))
        {
            mSoldierList.Remove(pUnit as SoldierUnit);
        }

        mSoldierCount--;
        DelSoldierDie?.Invoke();
        if (mSoldierCount <= 0)
        {
            HandleSoldierClear();
            DelSoldierClear?.Invoke();
        }
    }

    private void OnSoldierSplash(WarUnit pUnit, int pOverflowDamage)
    {
        SoldierUnit tSoldier = pUnit as SoldierUnit;
        if (mSoldierGroupDic.ContainsKey(tSoldier.GroupID) && mSoldierGroupDic[tSoldier.GroupID] != null && mSoldierGroupDic[tSoldier.GroupID].Count > 1)
        {
            List<SoldierUnit> tGroupList = mSoldierGroupDic[tSoldier.GroupID];
            int tOverflowDamage = pOverflowDamage;
            for (int i = 0; i < tGroupList.Count; i++)
            {
                if (tOverflowDamage <= 0)
                    break;

                if (tGroupList[i] == tSoldier || tGroupList[i].IsDead)
                    continue;

                tOverflowDamage = tGroupList[i].Hurt(tOverflowDamage, false);
            }
        }
    }

    private void OnSoldierHurt(int pDamage)
    {
        mTotalDamage += pDamage;
    }

    public void ActiveAllSoldier()
    {
        foreach (SoldierUnit tUnit in mSoldierList)
        {
            if (tUnit.gameObject.activeSelf && !tUnit.IsDead)
            {
                tUnit.Active();
            }
        }
    }

    public void Win()
    {
        foreach (SoldierUnit tUnit in mSoldierList)
        {
            if (tUnit.gameObject.activeSelf && !tUnit.IsDead)
            {
                tUnit.Win();
            }
        }
    }

    public void Lose()
    {
        //foreach (SoldierUnit tUnit in mSoldierList)
        //{
        //    if (tUnit.gameObject.activeSelf && !tUnit.IsDead)
        //    {
        //        tUnit.Die();
        //    }
        //}
    }
}