using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEditorInternal;

[CustomEditor(typeof(Modules_TooltipCtrl))]
public class TooltipInspector : Editor
{
    private ReorderableList _tooltipList;
    private void OnEnable()
    {
        _tooltipList = new ReorderableList(serializedObject, serializedObject.FindProperty("tooltipList")
            , true, true, true, true);

        //自定义列表名称
        _tooltipList.drawHeaderCallback = (Rect rect) =>
        {
            GUI.Label(rect, "Toottip List");
        };

        //定义元素的高度
        //_tooltipList.elementHeight = 68;

        //自定义绘制列表元素
        _tooltipList.drawElementCallback = (Rect rect, int index, bool selected, bool focused) =>
        {
            //根据index获取对应元素 
            SerializedProperty item = _tooltipList.serializedProperty.GetArrayElementAtIndex(index);
            rect.height -= 4;
            rect.y += 2;
            EditorGUI.PropertyField(rect, item, new GUIContent("Index " + index));
        };
        //点击添加按钮的同时添加一个Tooltip
        _tooltipList.onAddDropdownCallback = (Rect rect, ReorderableList list) =>
         {
             int index = _tooltipList.serializedProperty.arraySize;
             _tooltipList.serializedProperty.arraySize++;
             _tooltipList.index = index;
             SerializedProperty element = _tooltipList.serializedProperty.GetArrayElementAtIndex(index);

             Modules_TooltipCtrl tooltipCtrl = (Modules_TooltipCtrl)target;

             GameObject tooltip = Resources.Load<GameObject>("Prefabs/Tooltip");
             tooltip = tooltipCtrl.InstantiateNewTooltip(tooltip);

             SerializedProperty prefabPreperty = element.FindPropertyRelative("tooltip");
             prefabPreperty.objectReferenceValue = tooltip;
             SerializedProperty trigger = element.FindPropertyRelative("trigger");
             trigger.enumValueIndex = (int)Modules_TooltipCtrl.TooltipShowTrigger.AlwaysShow;
             serializedObject.ApplyModifiedProperties();
         };

        _tooltipList.onRemoveCallback = (ReorderableList list) =>
       {
           //当删除元素时候的回调函数，实现删除元素时，有提示框跳出
           if (EditorUtility.DisplayDialog("Warnning", "Do you want to remove this element?", "Remove", "Cancel"))
           {
               SerializedProperty element = _tooltipList.serializedProperty.GetArrayElementAtIndex(list.index);
               SerializedProperty prefabPreperty = element.FindPropertyRelative("tooltip");
               GameObject obj = (GameObject)prefabPreperty.objectReferenceValue;
               DestroyImmediate(obj);
               ReorderableList.defaultBehaviours.DoRemoveButton(list);
           }
       };
    }

    public override void OnInspectorGUI()
    {
        serializedObject.Update();
        //自动布局绘制列表
        _tooltipList.DoLayoutList();
        serializedObject.ApplyModifiedProperties();
    }
}