using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using AX.InputSystem;
using System;

/// <summary>
/// 鼠标指针管理类【单利模式】（游戏中，不同状态对于不同指针）
/// </summary>
public class CursorManager : MonoBehaviour
{
    /// <summary>
    /// 私有静态成员
    /// </summary>
    private static CursorManager instance;

    private GameObject cursor;
    private GameObject replayCursor;
    private Transform cursorParent;
    
    private DateTime t1;
    private DateTime t2;

    /// <summary>
    /// 外部访问，公共静态成员（单例）
    /// </summary>
    public static CursorManager GetInstance
    {
        get { return instance; }
    }

    void Start()
    {
        //赋值单例
        instance = this;

        Cursor.visible = false;

        cursorParent = GameObject.Find("Canvas").transform;

        cursor = Instantiate(cursorNormal, cursorParent) as GameObject;

        //添加层控制
        Canvas c;
        if (!cursor.GetComponent<Canvas>())
        {
            c = cursor.AddComponent<Canvas>();
        }
        else
        {
            c = cursor.GetComponent<Canvas>();
        }
        c.overrideSorting = true;
        c.sortingOrder = 30002;
        if (GameSettings.othersSettings.playState == PlayState.Playing)
        {
            cursor.SetActive(false);
        }
    }

    private void Update()
    {
        SetNormal();
        Cursor.visible = false;
        if (GameSettings.othersSettings.playState != PlayState.None)
        { 
            if (GameSettings.othersSettings.playState == PlayState.Playing)
            {
                if (replayCursor)
                {
                    replayCursor.SetActive(true);
                }

                if (!cursor.activeSelf)
                {
                    if (Input.GetAxis("Mouse X") != 0 || Input.GetAxis("Mouse Y") != 0)
                    {
                        cursor.SetActive(true);

                        t1 = DateTime.Now;
                    }
                }
                else
                {
                    t2 = DateTime.Now;
                    if ((t2 - t1) >= new TimeSpan(0, 0, 0, 3, 0))
                    {
                        if (Input.GetAxis("Mouse X") == 0 && Input.GetAxis("Mouse Y") == 0)
                        {
                            cursor.SetActive(false);
                        }
                    }
                }
            }
            else
            {
                if (replayCursor)
                {
                    replayCursor.SetActive(false);
                }

                if (cursor)
                {
                    cursor.SetActive(true);
                }
            }   
        }
    }

    /// <summary>
    /// 正常状态指针图
    /// </summary>
    public GameObject cursorNormal;

    public Sprite cursorNormalSprite;
    /// <summary>
    /// 单击状态指针
    /// </summary>
   // public Sprite cursorClick;
    public Sprite cursorClickSprite;
    /// <summary>
    /// 对话状态指针图
    /// </summary>
    //public Texture2D cursorNpcTalk;

    /// <summary>
    /// 攻击状态指针图
    /// </summary>
    //public Texture2D cursorAttack;

    /// <summary>
    /// 锁定状态指针图
    /// </summary>
    //public Texture2D cursorLockTarget;

    /// <summary>
    /// 拾捡物品状态指针图
    /// </summary>
    //public Texture2D cursorPick;

    /// <summary>
    /// 指针默认点击热点位置（指针左上角）
    /// </summary>
    //private Vector2 hotspot = Vector2.zero;

    /// <summary>
    /// 指针类型（Auto：自动选择）
    /// </summary>
    //private CursorMode mode = CursorMode.Auto;
    public Sprite AutoLiftArm;
    /// <summary>
    /// 设置默认指针显示图
    /// </summary>
    public void SetNormal()
    {
        //cursor.GetComponent<RectTransform>().anchoredPosition = new Vector2(Input.mousePosition.x, Input.mousePosition.y - Screen.height);
        Vector3 pos;
        if (RectTransformUtility.ScreenPointToWorldPointInRectangle((RectTransform)cursorParent, Input.mousePosition, cursorParent.gameObject.GetComponent<Canvas>().worldCamera, out pos))
        {
            cursor.GetComponent<RectTransform>().position = pos;
        }
        //光标始终悬浮在UI上
        cursor.transform.SetAsLastSibling();
        cursor.GetComponent<Image>().sprite = cursorNormalSprite;
    }
    public void SetAutoLiftArm()
    {
        cursor.GetComponent<Image>().sprite = AutoLiftArm;
    }
    /// <summary>
    /// 点击UI时的指针图
    /// </summary>
    public void SetClick(CmdArgs arg)
    {
        //if (!replayCursor)
        //{
        //    replayCursor = Instantiate(cursorNormal, cursorParent) as GameObject;
        //    replayCursor.GetComponent<Image>().sprite = cursorClick;
        //    replayCursor.GetComponent<RectTransform>().anchoredPosition = new Vector2(arg.currentCursorPos.x, arg.currentCursorPos.y - Screen.height);
        //}
        //else
        //{
        //    replayCursor.GetComponent<Image>().sprite = cursorClick;
        //    replayCursor.GetComponent<RectTransform>().anchoredPosition = new Vector2(arg.currentCursorPos.x, arg.currentCursorPos.y - Screen.height);
        //}
        if (!replayCursor)
        {
            replayCursor = Instantiate(cursorNormal, cursorParent) as GameObject;

            Canvas c;
            if (!replayCursor.GetComponent<Canvas>())
            {
                c = replayCursor.AddComponent<Canvas>();
            }
            else
            {
                c = replayCursor.GetComponent<Canvas>();
            }
            c.overrideSorting = true;
            c.sortingOrder = 30001;

            replayCursor.GetComponent<Image>().sprite = cursorClickSprite;
            Vector3 pos;
            if (RectTransformUtility.ScreenPointToWorldPointInRectangle((RectTransform)cursorParent, arg.currentCursorPos, cursorParent.gameObject.GetComponent<Canvas>().worldCamera, out pos))
            {
                replayCursor.GetComponent<RectTransform>().position = pos;
            }
        }
        else
        {
            replayCursor.GetComponent<Image>().sprite = cursorClickSprite;
            Vector3 pos;
            if (RectTransformUtility.ScreenPointToWorldPointInRectangle((RectTransform)cursorParent, arg.currentCursorPos, cursorParent.gameObject.GetComponent<Canvas>().worldCamera, out pos))
            {
                replayCursor.GetComponent<RectTransform>().position = pos;
            }
        }
    }
}