using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using TMPro; 
//控制选中取消角色与角色的移动
public class GameManager : MonoBehaviour
{
    public GameObject menuUI;       //调出菜单
    public float speed = 3.0f;      //镜头移动速度
    Character selected;      //记录选中的棋子
    bool menuActive = false;        //是否显示菜单
    bool exploreMode = false;       //true时为探索模式，false时为战斗模式
    public GameObject[]  pieces;    //记录所有的棋子
    public int[] groupCount;        //记录敌我双方棋子数量，groupCount[0]为友方，groupCount[1]为敌方
    public int currentGroup = 0;    //当前的回合是哪一方的,0是友军,1是敌方
    float horizontal;               //移动镜头
    float vertical;                 //移动镜头
    public GameObject turnObject;                                                    // **   回合UI
    public GameObject turnText;                                                     // **   敌我回合的文本框

    public GameObject myBag;        // **** 背包
    bool isOpen;                    // **** 背包是否打开

    void Start()
    {
        SearchPieces();
        SetCount();
        if (GetExploreMode())                                                        // **
            turnObject.SetActive(false);                                              // **  探索模式下不显示敌我回合
        else                                                                         // **
            turnObject.SetActive(true);                                               // **
    }
    void Update()
    {
        if(!menuActive)
        {
            ShowTurn();                                                // **  不显示菜单时先判断是否显示敌我回合
            ShowBag();                                                 // **** 不显示菜单时可以打开背包
            //选中角色时，镜头移动到角色上，方向键控制角色走动
            if (selected != null)
            {
                //取消选择
                if(Input.GetMouseButtonDown(1))
                {
                    selected.Cancel();
                }
                MoveCharacter();
                 //选中角色在lookDirection方向上与NPC对话
                if (exploreMode && Input.GetKeyDown(KeyCode.X))
                    selected.Dialogue();
                // **** 按x捡起物品
                if (Input.GetKeyDown("x"))
                    selected.Pickup();
                //选中角色时可切换武器
                if(Input.GetKeyDown("c"))
                    selected.GetNextWeapon();
            }
            //未选中角色时，方向键控制镜头移动
            else
                MoveCamera();
        }
        CallMenu();
    }
    //移动镜头
    void MoveCamera()
    {
        horizontal = Input.GetAxis("Horizontal");
        vertical = Input.GetAxis("Vertical");
        Vector2 position = transform.position;
        position.x += speed*horizontal*Time.deltaTime;
        position.y += speed*vertical*Time.deltaTime;
        transform.position = position;
    }
    //移动角色
    void MoveCharacter()
    {
        transform.position = selected.transform.position;
        //角色走动
        if(Input.GetKeyDown("up"))
        {
            selected.Move(Vector2.up);
        }
        if(Input.GetKeyDown("down"))
        {
            selected.Move(Vector2.down);
        }
        if(Input.GetKeyDown("left"))
        {
            selected.Move(Vector2.left);
        }
        if(Input.GetKeyDown("right"))
        {
            selected.Move(Vector2.right);
        }
        //角色转向
        if(Input.GetKeyDown("w"))
        {
            selected.Turn(Vector2.up);
        }
        if(Input.GetKeyDown("s"))
        {
            selected.Turn(Vector2.down);
        }
        if(Input.GetKeyDown("a"))
        {
            selected.Turn(Vector2.left);
        }
        if(Input.GetKeyDown("d"))
        {
            selected.Turn(Vector2.right);
        }
    }
    //呼出菜单
    void CallMenu()
    {
        if(Input.GetKeyDown("escape"))
        {
            menuActive = !menuActive;
            menuUI.SetActive(menuActive);
        }
    }
    //改变选中的棋子
    public void SetSelected(Character character)
    {
        selected = character;
    }
    //返回选中的棋子
    public Character GetSelected()
    {
        return selected;
    }
    //回合结束
    public void TurnEnd()
    {
        if(exploreMode)     return;
        if(currentGroup == 0)
            currentGroup = 1;
        else
            currentGroup = 0;           //交换回合
        foreach (var piece in pieces)
        {
            if(piece.GetComponent<Character>().groupNumber == currentGroup)
                piece.GetComponent<Character>().ReSet();
        }
        if(selected != null)
            selected.Cancel();
    }
    //搜寻棋子
    public void SearchPieces()
    {
        pieces = GameObject.FindGameObjectsWithTag("Pieces");
    }
    //数敌我双方棋子数
    void SetCount()
    {
        groupCount = new int[3];
        foreach (var piece in pieces)
        {
            Character character = piece.GetComponent<Character>();
            groupCount[character.groupNumber] ++ ;
            //Debug.Log("gruopCount[" + character.groupNumber + "] = " + groupCount[character.groupNumber]);
        }
    }
    public bool GetExploreMode()
    {
        return exploreMode;
    }
    //当敌人数量为0时，状态切换为探索模式
    public void SetExploreMode()
    {
        if(groupCount[1] == 0)
        {
            selected.Cancel();
            exploreMode = true;
            Debug.Log("exploreMode");
            currentGroup = 0;
            foreach (var piece in pieces)
            {
                piece.GetComponent<Character>().ReSet();
            }
        }
    }
    void ShowTurn()                                                                     // **
    {                                                                                   // **
        if (exploreMode)                                                                // **   探索模式下不显示敌我回合
            turnObject.SetActive(false);                                                // **   
        else                                                                            // **
        {                                                                               // **
            if (currentGroup != 0)                                                      // **
                turnText.GetComponent<TMP_Text>().text = "敌方回合";                    // **
            else                                                                        // **
                turnText.GetComponent<TMP_Text>().text = "我方回合";                    // **
            turnObject.SetActive(true);                                                  // **   战斗模式下始终显示敌我回合
        }                                                                               // **
    }
    
    void ShowBag() // **** 是否显示背包
    {
        isOpen = myBag.activeSelf; // **** 防止鼠标点击退出背包后按两次I才能再次打开
        if(Input.GetKeyDown("i")) // **** 按I键打开背包
        {
            isOpen = !isOpen; // **** 
            myBag.SetActive(isOpen); // **** 
            InventoryManager.RefreshItem(); // **** 
        }
    }
}