using UnityEngine;
using UnityEditor;

namespace Klak.Hap
{
    [CanEditMultipleObjects]
    [CustomEditor(typeof(HapPlayer))]
    sealed class HapPlayerEditor : Editor
    {
        SerializedProperty _filePath;
        SerializedProperty _pathMode;
        SerializedProperty _time;
        SerializedProperty _speed;
        SerializedProperty _loop;
        SerializedProperty _targetTexture;
        SerializedProperty _flipHorizontal;
        SerializedProperty _flipVertical;

        static class Labels
        {
            public static readonly GUIContent Property = new GUIContent("Property");
            public static readonly GUIContent Select = new GUIContent("Select");
        }

        string _sourceInfo;

        void ShowSourceInfo(HapPlayer player)
        {
            if (!player.enabled || !player.gameObject.activeInHierarchy) return;

            if (!player.isValid)
            {
                EditorGUILayout.HelpBox(
                    "Failed to open file. " +
                    "Please specify a valid HAP-encoded .mov file.",
                    MessageType.Warning
                );
                return;
            }

            if (_sourceInfo == null)
                _sourceInfo = string.Format(
                    "Codec: {0}\n" +
                    "Frame dimensions: {1} x {2}\n" +
                    "Stream duration: {3:0.00}\n" +
                    "Frame rate: {4:0.00}",
                    player.codecType,
                    player.frameWidth, player.frameHeight,
                    player.streamDuration,
                    player.frameCount / player.streamDuration
                );

            EditorGUILayout.HelpBox(_sourceInfo, MessageType.None);
        }

        void OnEnable()
        {
            _filePath = serializedObject.FindProperty("_filePath");
            _pathMode = serializedObject.FindProperty("_pathMode");
            _time = serializedObject.FindProperty("_time");
            _speed = serializedObject.FindProperty("_speed");
            _loop = serializedObject.FindProperty("_loop");
            _targetTexture = serializedObject.FindProperty("_targetTexture");
            _flipHorizontal = serializedObject.FindProperty("_flipHorizontal");
            _flipVertical = serializedObject.FindProperty("_flipVertical");
        }

        public override void OnInspectorGUI()
        {
            var reload = false;

            serializedObject.Update();

            // Source infomation
            if (!_filePath.hasMultipleDifferentValues &&
                !_pathMode.hasMultipleDifferentValues &&
                !string.IsNullOrEmpty(_filePath.stringValue))
            {
                ShowSourceInfo((HapPlayer)target);
            }

            // Source file (드래그 앤 드롭 + 파일 브라우저)
            EditorGUILayout.BeginHorizontal();
            EditorGUI.BeginChangeCheck();
            EditorGUILayout.DelayedTextField(_filePath);
            if (GUILayout.Button("파일 선택", GUILayout.Width(80)))
            {
                string path = EditorUtility.OpenFilePanel("HAP MOV 파일 선택", Application.dataPath, "mov");
                if (!string.IsNullOrEmpty(path))
                {
                    string streamingPath = Application.streamingAssetsPath;
                    if (path.StartsWith(streamingPath))
                        path = path.Substring(streamingPath.Length + 1);
                    _filePath.stringValue = path;
                }
            }
            EditorGUILayout.EndHorizontal();
            if (EditorGUI.EndChangeCheck()) reload = true;

            // 드래그 앤 드롭 지원
            Rect dropRect = GUILayoutUtility.GetLastRect();
            if (Event.current.type == EventType.DragUpdated || Event.current.type == EventType.DragPerform)
            {
                if (dropRect.Contains(Event.current.mousePosition))
                {
                    DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
                    if (Event.current.type == EventType.DragPerform)
                    {
                        DragAndDrop.AcceptDrag();
                        foreach (var dragged in DragAndDrop.paths)
                        {
                            if (dragged.ToLower().EndsWith(".mov"))
                            {
                                string path = dragged;
                                string streamingPath = Application.streamingAssetsPath;
                                if (path.StartsWith(streamingPath))
                                    path = path.Substring(streamingPath.Length + 1);
                                _filePath.stringValue = path;
                                GUI.FocusControl(null);
                                reload = true;
                                break;
                            }
                        }
                        Event.current.Use();
                    }
                }
            }

            // Playback control
            EditorGUILayout.PropertyField(_time);
            EditorGUILayout.PropertyField(_speed);
            EditorGUILayout.PropertyField(_loop);

            // Flip options
            EditorGUILayout.Space();
            EditorGUILayout.LabelField("Flip Options", EditorStyles.boldLabel);
            EditorGUILayout.PropertyField(_flipHorizontal, new GUIContent("Flip Horizontal"));
            EditorGUILayout.PropertyField(_flipVertical, new GUIContent("Flip Vertical"));

            // Target texture
            EditorGUILayout.PropertyField(_targetTexture);

            serializedObject.ApplyModifiedProperties();

            if (reload)
            {
                foreach (HapPlayer hp in targets)
                {
                    hp.SendMessage("OnDestroy");
                    hp.SendMessage("LateUpdate");
                }
                _sourceInfo = null;
            }
        }
    }
}