using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using VketCloudGUITools.Runtime;

namespace VketCloudGUITools.Editor
{
    /// <summary>
    /// IVCGUIItem用のInspector用便利関数
    /// 継承でUI処理使いまわせないので所属にする
    /// </summary>
    public class VCGUIItemInspectorHelper
    {
        // Interfaceなので内部変数名が一致するとは限らない
        // いちおうデフォルトによく使う値をいれるが、適時カスタマイズが必要
        public string propertyNameScript = "m_Script";
        public string propertyNameVcguiTransform = "_vcTransform";
        public string propertyNameCanvas = "_parentLayer";
        public string propertyNameVisible = "_visible";

        public SerializedObject serializedObject;
        public IVCGUIItem item;

        public SerializedProperty scriptProperty;
        public SerializedProperty vcTransformProperty;
        public SerializedProperty parentLayerProperty;
        public SerializedProperty visibleProperty;

        public void OnEnable(SerializedObject serializedObject, IVCGUIItem item)
        {
            this.serializedObject = serializedObject;
            this.item = item;

            RefleshSerializedProperty();
        }

        private void RefleshSerializedProperty()
        {
            scriptProperty = serializedObject.FindProperty(propertyNameScript);
            vcTransformProperty = serializedObject.FindProperty(propertyNameVcguiTransform);
            parentLayerProperty = serializedObject.FindProperty(propertyNameCanvas);
            visibleProperty = serializedObject.FindProperty(propertyNameVisible);
        }

        private VCTransform GetVcguiTransform(IVCGUIItem targetItem)
        {
            IHasVCTransform hasTransform = targetItem as IHasVCTransform;

            if (hasTransform != null)
            {
                return hasTransform.VcTransform;
            }
            return null;
        }

        private GameObject GetGameObject(IVCGUIItem targetItem)
        {
            MonoBehaviour mono = targetItem as MonoBehaviour;

            if (mono != null)
            {
                return mono.gameObject;
            }
            return null;
        }

        public void DrawPropertyScript()
        {
            EditorGUILayout.PropertyField(scriptProperty);
        }

        public void DrawPropertyVcTransform()
        {
            EditorGUILayout.PropertyField(vcTransformProperty);
        }

        public void DrawPropertyParentLayer()
        {
            EditorGUILayout.PropertyField(parentLayerProperty);
        }

        public void DrawPropertyVisible()
        {
            EditorGUILayout.Toggle(nameof(IVCGUIItem.Visible), item.Visible);
        }

        public void DrawPropertyShow()
        {
            var gameObject = GetGameObject(item);

            EditorGUI.BeginChangeCheck();
            var newShow = EditorGUILayout.Toggle(nameof(IVCGUIItem.Show), item.Show);
            if (EditorGUI.EndChangeCheck())
            {
                Undo.RecordObject(gameObject, "VCGUI Item");
                item.Show = newShow;
            }
        }

        public void DrawPropertyPos()
        {
            var vcguiTransform = GetVcguiTransform(item);

            EditorGUI.BeginChangeCheck();
            var newPos = EditorGUILayout.Vector2IntField(nameof(IVCGUIItem.Pos), item.Pos);
            if (EditorGUI.EndChangeCheck())
            {
                Undo.RecordObjects(new Object[] { vcguiTransform.transform, vcguiTransform }, "VCGUI Item");
                item.Pos = newPos;
            }
        }

        public void DrawPropertySize()
        {
            var vcguiTransform = GetVcguiTransform(item);

            EditorGUI.BeginChangeCheck();
            var newSize = EditorGUILayout.Vector2IntField(nameof(IVCGUIItem.Size), item.Size);
            if (EditorGUI.EndChangeCheck())
            {
                Undo.RecordObjects(new Object[] { vcguiTransform.transform, vcguiTransform }, "VCGUI Item");
                item.Size = newSize;
            }
        }

        public void DrawPropertyZ()
        {
            var vcguiTransform = GetVcguiTransform(item);

            EditorGUI.BeginChangeCheck();
            var newZ = EditorGUILayout.IntField(nameof(IVCGUIItem.Z), item.Z);
            if (EditorGUI.EndChangeCheck())
            {
                Undo.RecordObjects(new Object[] { vcguiTransform.transform, vcguiTransform }, "VCGUI Item");
                item.Z = newZ;
            }
        }

    }
}