using System;
using System.Collections.Generic;
using TMPro;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
using Object = UnityEngine.Object;

public abstract class UI_Base : MonoBehaviour
{
    Dictionary<Type, Object[]> _objects = new Dictionary<Type, Object[]>();
    public abstract void Init();
    
    protected void Bind<T>(Type type) where T : Object
    {
        string[] names = Enum.GetNames(type);
        Object[] objects = new Object[names.Length];
        _objects.Add(typeof(T), objects);
        
        for (int i = 0; i < names.Length; i++)
        {
            if(typeof(T) == typeof(GameObject))
            {
                objects[i] = Util.FindChild(gameObject, names[i],true);
            }
            else
            {
                objects[i] = Util.FindChild<T>(gameObject, names[i],true);                
            }
            
        }
    }
    
    protected T Get<T>(int idx) where T : Object
    {
        Object[] objects = null;
        if (_objects.TryGetValue(typeof(T), out objects) == false || idx < 0 || idx >= objects.Length)
            return null;
        return objects[idx] as T;
    }

    protected TextMeshProUGUI GetText(int idx) { return Get<TextMeshProUGUI>(idx); }
    protected Button GetButton(int idx) { return Get<Button>(idx); }
    protected Image GetImage(int idx) { return Get<Image>(idx); }


    public static void AddUIEvent(GameObject go, Action<PointerEventData> action, Define.UIEvent type = Define.UIEvent.Click)
    {
        UI_EventHandler evt = Util.GetOrAddComponent<UI_EventHandler>(go);
        switch (type)
        {
            case Define.UIEvent.Click:
                evt.OnClickHandler -= action;
                evt.OnClickHandler += action;
                break;
            case Define.UIEvent.Drag:
                evt.OnDragHandler -= action;
                evt.OnDragHandler += action;
                break;
        }
    }
}