using UnityEditor;
using UnityEditorInternal;
using UnityEngine;

namespace uc
{
    [CanEditMultipleObjects, CustomEditor(typeof(CanvasActivity), false)]
    public class CanvasActivityEditor : ActivityBaseEditor
    {
        SerializedProperty m_FadeTimeProperty;
        GUIContent m_FadeTimeLabel;
        SerializedProperty m_FadeOutTimeProperty;

        SerializedProperty m_TouchDelayProperty;
        GUIContent m_TouchDelayLabel;

        SerializedProperty m_GlobalItemsProperty;
        ReorderableList m_GlobalItemsList;

        CanvasActivity canvas_activity;

        protected override void OnEnable()
        {
            base.OnEnable();

            canvas_activity = target as CanvasActivity;

            m_FadeTimeProperty = serializedObject.FindProperty("fadeTime");
            m_FadeTimeLabel = new GUIContent("Fading Time", "time to fade canvas (second)");

            m_FadeOutTimeProperty = serializedObject.FindProperty("fadeOutTime");

            m_TouchDelayProperty = serializedObject.FindProperty("touchDelayTime");
            m_TouchDelayLabel = new GUIContent("Delay Time", "delay time to interactable");

            m_GlobalItemsProperty = serializedObject.FindProperty("sharedComponents");
            m_GlobalItemsList = new ReorderableList(serializedObject, m_GlobalItemsProperty, true, true, true, true);
            m_GlobalItemsList.drawHeaderCallback = rect =>
            {
                EditorGUI.LabelField(rect, "Shared Components");
            };
            m_GlobalItemsList.drawElementCallback = (rect, index, active, focused) =>
            {
                SerializedProperty prefab = m_GlobalItemsProperty.GetArrayElementAtIndex(index);
                RectTransform go = (RectTransform)prefab.objectReferenceValue;

                GUIContent label;
                if (go == null)
                {
                    label = new GUIContent("Empty", "Drag a GameObject here");
                }
                else
                {
                    label = new GUIContent(go.name);
                }

                float shrink = 0.2f;
                rect.y += rect.height * shrink * 0.4f;
                rect.height *= (1.0f - shrink);

                var newGameObject = (RectTransform)EditorGUI.ObjectField(rect, label, go, typeof(RectTransform), true);
                if (newGameObject == null)
                {
                    canvas_activity.sharedComponents[index] = null;
                    EditorUtility.SetDirty(target);
                    return;
                }
                if (canvas_activity.sharedComponents[index] != newGameObject)
                {
                    canvas_activity.sharedComponents[index] = newGameObject;
                    EditorUtility.SetDirty(target);
                }
            };
        }

        public override void OnInspectorGUI()
        {
            EditorGUILayout.Space();
            serializedObject.Update();

            EditorGUILayout.PropertyField(m_FadeTimeProperty, m_FadeTimeLabel);
            EditorGUILayout.PropertyField(m_FadeOutTimeProperty);

            EditorGUILayout.PropertyField(m_TouchDelayProperty, m_TouchDelayLabel);

            EditorGUILayout.Space();
            m_GlobalItemsList.DoLayoutList();

            serializedObject.ApplyModifiedProperties();

            DrawEventInspectorGUI();
        }
    }
}