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

#if UNITY_EDITOR
using UnityEditor;
#endif

public partial class UIdSystem : MonoBehaviour
{
    [Serializable]
    private class ComponentIdPair
    {
        [SerializeField]
        private Component component;
        [SerializeField]
        private ulong id;

        public ComponentIdPair(Component component, ulong id)
        {
            this.component = component;
            this.id = id;
        }

        public Component Component
        {
            get { return component; }
            set { component = value; }
        }

        public ulong Id
        {
            get { return id; }
            set { id = value; }
        }
    }

#if UNITY_EDITOR
    [CustomPropertyDrawer(typeof(ComponentIdPair))]
    public class ComponentIdPairDrawer : PropertyDrawer
    {
        public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
        {
            return EditorGUIUtility.singleLineHeight;
        }

        public override void OnGUI(Rect rect, SerializedProperty property, GUIContent label)
        {
            SerializedProperty objectProperty = property.FindPropertyRelative("component");
            SerializedProperty idProperty = property.FindPropertyRelative("id");
            UnityEngine.Object objectValue = objectProperty.objectReferenceValue;

            bool isGameObject = false;
            bool isUIdSystemComponent = false;

            if (objectValue != null)
            {
                Type objectType = objectValue.GetType();
                isGameObject = objectType.IsAssignableFrom(typeof(GameObject));
                isUIdSystemComponent = objectType.IsAssignableFrom(typeof(UIdSystem));
            }

            // 开始绘制属性
            EditorGUI.BeginProperty(rect, label, property);

            rect = EditorGUI.PrefixLabel(rect, GUIUtility.GetControlID(FocusType.Passive), label);

            int indent = EditorGUI.indentLevel;
            EditorGUI.indentLevel = 0; // 不缩进

            // 计算位置和大小
            Rect objectRect, idRect;

            objectRect = new Rect(rect.x, rect.y, 160f, rect.height);

            if (isGameObject)
                idRect = new Rect(rect.x + 165f, rect.y, rect.width - 165f, rect.height);
            else
                idRect = new Rect(rect.x + 165f, rect.y, rect.width - 190f, rect.height);

            Color oldColor = GUI.color;
            GUI.color = Color.green;

            // 不允许编辑
            GUI.enabled = false;

            EditorGUI.PropertyField(objectRect, objectProperty, GUIContent.none);
            EditorGUI.PropertyField(idRect, idProperty, GUIContent.none);

            GUI.color = oldColor;
            GUI.enabled = true;

            EditorGUI.indentLevel = indent;

            EditorGUI.EndProperty();
        }
    }
#endif
}