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

public class UIManager : Singleton<UIManager>
{
    class UIElement
    {
        public string Resources;  //资源路径
        public bool Cache;     //是否启用
        public GameObject Instance;  //资源预制体
    }
    private Dictionary<Type, UIElement> UIResources = new Dictionary<Type, UIElement>(); //存放
    public UIManager()
    {
        this.UIResources.Add(typeof(UILoad), new UIElement() { Resources = "UI/UILoad", Cache = false });
        this.UIResources.Add(typeof(UISetting), new UIElement() { Resources = "UI/UISetting", Cache = false });
        this.UIResources.Add(typeof(UIGameOver), new UIElement() { Resources = "UI/GameOver", Cache = false });
        this.UIResources.Add(typeof(UILottery), new UIElement() { Resources = "UI/LotterySystem", Cache = false });
        this.UIResources.Add(typeof(UIEnterScene), new UIElement() { Resources = "UI/EnterScene", Cache = false });
        this.UIResources.Add(typeof(UIOpen), new UIElement() { Resources = "UI/UIOpen", Cache = false });
        this.UIResources.Add(typeof(EndUI), new UIElement() { Resources = "UI/EndUI", Cache = false });
        this.UIResources.Add(typeof(UIBagInfo), new UIElement() { Resources = "UI/BagUI", Cache = false });
        this.UIResources.Add(typeof(UILevelUp), new UIElement() { Resources = "UI/UILevelUp", Cache = false });

        this.UIResources.Add(typeof(MessageBox), new UIElement() { Resources = "UI/MessageBox", Cache = false });

        this.UIResources.Add(typeof(UISaveDate), new UIElement() { Resources = "UI/UISave", Cache = false });

    }
    ~UIManager()
    {

    }

    /// <summary>
    /// 加载UI
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <returns></returns>
    public T Show<T>()
    {
        Type type=typeof(T);
        if(this.UIResources.ContainsKey(type))
        {
            UIElement info = UIResources[type];
            if(info.Instance!=null)
            {
                info.Instance.SetActive(true);
            }
            else
            {
                UnityEngine.Object prefab = Resources.Load(info.Resources);
                if (prefab == null)
                {
                    return default(T);
                }
                info.Instance = (GameObject)GameObject.Instantiate(prefab);
            }
            return info.Instance.GetComponent<T>();
        }
        return default(T);
    }

    /// <summary>
    /// 关闭UI
    /// </summary>
    /// <param name="type"></param>
    public void Close(Type type)
    {
        if (this.UIResources.ContainsKey(type))
        {
            UIElement info = this.UIResources[type];
            if (info.Cache)
            {
                info.Instance.SetActive(false);
            }
            else
            {
                GameObject.Destroy(info.Instance);
                info.Instance = null;
            }
        }
    }
    public void Close<T>()
    {
        this.Close(typeof(T));
    }
}