using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEngine.UIElements;
using YKMoon;

namespace YKMoonEditor
{
    [CustomPropertyDrawer(typeof(YKAnimatorPresetStyleSelectorAttribute))]
    public class YKAnimatorPresetStyleSelectorAttributeDrawer : PropertyDrawer
    {
        public Texture2D icon {
            get {
                if(m_icon == null) {
                    m_icon = PackageUtility.LoadIcon("AnimatorControllerPresetIcon.png");
                }
                return m_icon;
            }
        }
        private Texture2D m_icon;

        public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
        {
            EditorGUI.BeginProperty(position, label, property);
            if(property.propertyType != SerializedPropertyType.String) {
                EditorGUI.LabelField(position, "ERROR:", "May only apply to type string");
                EditorGUI.EndProperty();
                return;
            }
            var styleNames = GetStyleNames();
            int index = styleNames.FindIndex(0, styleNames.Count, style => style.text.Equals(property.stringValue));
            index = EditorGUI.Popup(position, label, index, styleNames.ToArray());
            if(index >= 0) {
                property.stringValue = styleNames[index].text;
            } else {
                property.stringValue = styleNames[0].text;
            }
            EditorGUI.EndProperty();
        }

        private static YKAnimatorPresetSetting GetSettings()
        {
            return YKAnimatorPresetSettingManager.GetSettings();
        }

        private List<GUIContent> GetStyleNames()
        {
            List<GUIContent> result = new List<GUIContent>();
            var settings = GetSettings();
            foreach(var style in settings.styles) {
                result.Add(new GUIContent(style.name, icon));
            }
            return result;
        }
    }
}