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

namespace WildAttack
{
    /// <summary>
    /// UI管理类
    /// </summary>
    public class UIManager : Singleton<UIManager>
    {
        #region Members
        public Transform uiRoot;
        private Transform hpBarRoot;
        private Transform flotageRoot;
        private MainPanel mainPanel;
        private GameOverPanel gameOverPanel;
        private HPBarPanel hpBarPanel;

        private CrossHair crossHair;
        public CanvasScaler uiRootCanvasScaler;

        #endregion

        #region Functions
        public void Init(Action callBack)
        {

            uiRoot = GameObject.Find("UIRoot").transform;
            uiRootCanvasScaler = uiRoot.GetComponent<CanvasScaler>();
            //ScaleWithScreen();

            hpBarRoot = GameObject.Find("HpBarRoot").transform;
            flotageRoot = GameObject.Find("FlotageRoot").transform;
            mainPanel = GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("UI/MainPanel"), uiRoot).GetComponent<MainPanel>();
            gameOverPanel = GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("UI/GameOverPanel"), uiRoot).GetComponent<GameOverPanel>();
            hpBarPanel = GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("UI/HPBarPanel"), hpBarRoot).GetComponent<HPBarPanel>();

            crossHair = GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("UI/CrossHairPanel"), uiRoot).GetComponentInChildren<CrossHair>();
            GameObject.Instantiate<GameObject>(Resources.Load<GameObject>("UI/FlotagePanel"), flotageRoot);
            gameOverPanel.gameObject.SetActive(false);
            crossHair.gameObject.SetActive(false);


            callBack();
        }

        /// <summary>
        /// 计算canvas缩放 uiScaleMode为constantPixelSize时
        /// </summary>
        public void ScaleWithScreen()
        {
            float w = Screen.width / 1280f;
            float h = Screen.height / 720f;
            if (w < h)
                uiRootCanvasScaler.scaleFactor = w;
            else
                uiRootCanvasScaler.scaleFactor = h;
        }

        /// <summary>
        /// 开始游戏和重开对应ui
        /// </summary>
        /// <param name="active"></param>
        public void SetDefaultProcess(bool active)
        {
            // active
            mainPanel.SetProcessInfoActive(active);
            hpBarPanel.SetProcessInfoActive(active);
        }

        /// <summary>
        /// 游戏结束
        /// </summary>
        /// <param name="isWin"></param>
        public void GameOver(bool isWin)
        {
            if (!gameOverPanel.gameObject.activeSelf)
            {
                gameOverPanel.gameObject.SetActive(true);
                crossHair.gameObject.SetActive(false);
                gameOverPanel.ShowGameOverPanel(isWin);
                //GameMananger.GetInstance().ResetAim();
                //crossHair.ResetCrossHair();
            }

        }
        public void HideMainPanel()
        {
            mainPanel.gameObject.SetActive(false);
            hpBarPanel.gameObject.SetActive(false);
        }

        public void Restart()
        {
            mainPanel.gameObject.SetActive(true);
            mainPanel.GetComponent<MainPanel>().RenderUserInfo();
            hpBarPanel.gameObject.SetActive(true);
            gameOverPanel.gameObject.SetActive(false);
            crossHair.gameObject.SetActive(false);
        }

        #region HpBar
        /// <summary>
        /// 血条相关
        /// </summary>
        public void AddHp()
        {
            hpBarPanel.AddHp();
        }
        public void SubHp()
        {
            hpBarPanel.SubHp();
        }
        public void ResetHpBar()
        {
            hpBarPanel.ResetHpBar();
        }
        #endregion

        /// <summary>
        /// 计算canvas缩放 uiScaleMode为ScaleWithScreenSize时
        /// </summary>
        private float ScaleFactor => Screen.width / uiRootCanvasScaler.referenceResolution.x * (1 - uiRootCanvasScaler.matchWidthOrHeight) + Screen.height / uiRootCanvasScaler.referenceResolution.y * uiRootCanvasScaler.matchWidthOrHeight;

        /// <summary>
        /// 获取准星位置
        /// </summary>
        /// <returns></returns>
        public Vector2 GetCrossHairPos()
        {
            return crossHair._rectTransform.anchoredPosition * ScaleFactor;
        }

        #endregion
    }
}