using System.Linq;
using UnityEditor;
using UnityEngine;

namespace AibisDream.FrameAnimation.Editor
{
    [CustomEditor(typeof(FrameClip))]
    public sealed class FrameClipEditor : UnityEditor.Editor
    {
        public override void OnInspectorGUI()
        {
            var clip = (FrameClip)target;
            var owners = FrameAnimationAssetReferenceIndex.FindGraphsReferencing(clip);
            var kind = clip.IsImported
                ? "Graph Imported FrameClip"
                : clip.HasStandaloneImportSource ? "Source-linked External FrameClip" : "Manual FrameClip";
            EditorGUILayout.LabelField(kind, EditorStyles.boldLabel);
            using (new EditorGUI.DisabledScope(true))
            {
                EditorGUILayout.TextField("ID", clip.Id);
                EditorGUILayout.TextField("Display Name", clip.DisplayName);
                EditorGUILayout.FloatField("Speed", clip.Speed);
                EditorGUILayout.EnumPopup("Default End", clip.DefaultEndBehavior);
                EditorGUILayout.IntField("Frames", clip.FrameCount);
                EditorGUILayout.LongField("Total Duration Ms", clip.TotalDurationMs);
                EditorGUILayout.TextField("Storage", AssetDatabase.IsSubAsset(clip) ? "Graph sub-asset" : "External .asset");
                EditorGUILayout.TextField("Source Tag", clip.ImportInfo?.SourceTagName ?? string.Empty);
                EditorGUILayout.Toggle("Missing", clip.ImportInfo?.IsMissingFromSource ?? false);
                EditorGUILayout.ObjectField("Standalone Texture", clip.StandaloneImportSource?.Texture, typeof(Texture2D), false);
                EditorGUILayout.ObjectField("Standalone JSON", clip.StandaloneImportSource?.AsepriteJson, typeof(TextAsset), false);
            }
            if (!AssetDatabase.IsSubAsset(clip) && owners.Count > 1)
            {
                EditorGUILayout.HelpBox(
                    "该外部 Manual Clip 被多个 Graph 共享：" + string.Join(", ", owners.Select(graph => graph.name)),
                    MessageType.Warning);
            }
            EditorGUILayout.HelpBox(
                AssetDatabase.IsSubAsset(clip)
                    ? "Graph sub-asset 的 Clip 数据请在 Frame Animation Graph Editor 中编辑。"
                    : "双击资产或使用下方按钮，在独立 Frame Clip Editor 中编辑。",
                MessageType.Info);
            if (!AssetDatabase.IsSubAsset(clip) && GUILayout.Button("Open Frame Clip Editor"))
            {
                FrameClipEditorWindow.Open(clip);
            }
            if (owners.Count == 0)
            {
                EditorGUILayout.HelpBox("当前没有 FrameAnimationGraph 引用该 Clip。", MessageType.Info);
            }
            else if (owners.Count == 1)
            {
                if (GUILayout.Button("Open Referencing Graph"))
                {
                    FrameAnimationGraphEditorWindow.Open(owners[0]);
                }
            }
            else if (GUILayout.Button("Choose Referencing Graph"))
            {
                var menu = new GenericMenu();
                foreach (var owner in owners)
                {
                    var captured = owner;
                    menu.AddItem(new GUIContent(owner.name), false,
                        () => FrameAnimationGraphEditorWindow.Open(captured));
                }
                menu.ShowAsContext();
            }
        }
    }
}