using UnityEditor;
using UnityEditorInternal;
using UnityEngine;

namespace uc
{
    [CanEditMultipleObjects, CustomEditor(typeof(MoviePlayerCanvas), false)]
    public class MoviePlayerCanvasEditor : ActivityBaseEditor
    {
        SerializedProperty m_LoopProperty;
        GUIContent m_LoopLabel;

        SerializedProperty m_FilenamesProperty;
        ReorderableList m_FilenamesList;

        MoviePlayerCanvas canvas;

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

            canvas = target as MoviePlayerCanvas;

            m_LoopProperty = serializedObject.FindProperty("loop");
            m_LoopLabel = new GUIContent("Loop", "loop movie");

            m_FilenamesProperty = serializedObject.FindProperty("filenames");
            m_FilenamesList = new ReorderableList(serializedObject, m_FilenamesProperty, true, true, true, true);
            m_FilenamesList.drawHeaderCallback = rect =>
            {
                EditorGUI.LabelField(rect, "Movie Filenames");
            };
            m_FilenamesList.drawElementCallback = (rect, index, active, focused) =>
            {
#if true
                SerializedProperty prefab = m_FilenamesProperty.GetArrayElementAtIndex(index);
                DShowClip go = (DShowClip)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 = (DShowClip)EditorGUI.ObjectField(rect, label, go, typeof(DShowClip), true);
                if (newGameObject == null)
                {
                    canvas.filenames[index] = null;
                    EditorUtility.SetDirty(target);
                    return;
                }
                if (canvas.filenames[index] != newGameObject)
                {
                    canvas.filenames[index] = newGameObject;
                    EditorUtility.SetDirty(target);
                }
#else
                SerializedProperty prefab = m_FilenamesProperty.GetArrayElementAtIndex(index);
                
                string go = prefab.stringValue;

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

                go = EditorGUI.TextField(rect, go);

                if (string.IsNullOrEmpty(go))
                {
                    canvas.filenames[index] = "";
                    EditorUtility.SetDirty(target);
                    return;
                }

                if (canvas.filenames[index] != go)
                {
                    canvas.filenames[index] = go;
                    EditorUtility.SetDirty(target);
                }
#endif
            };
        }

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

            EditorGUILayout.PropertyField(m_LoopProperty, m_LoopLabel);

            EditorGUILayout.Space();
            m_FilenamesList.DoLayoutList();

            serializedObject.ApplyModifiedProperties();

            DrawEventInspectorGUI();
        }
    }
}