using UnityEditor;
using UnityEngine;
using UnityEngine.UIElements;

public class FoldWindow : EditorWindow
{
    const string GraphPath = "Assets/FoldGraph.asset";

    FoldGraphView graphView;
    FoldGraph graphAsset;

    [MenuItem("Tools/yum_food/Fold")]
    public static void Open()
    {
        var window = GetWindow<FoldWindow>();
        window.titleContent = new GUIContent("Fold");
        window.Show();
    }

    void OnEnable()
    {
        graphAsset = LoadOrCreateGraph();
        ConstructGraphView();
        Undo.undoRedoPerformed += OnUndoRedo;
    }

    void OnDisable()
    {
        if (graphView != null)
        {
            rootVisualElement.Remove(graphView);
            graphView.Dispose();
            graphView = null;
        }

        AssetDatabase.SaveAssets();
        Undo.undoRedoPerformed -= OnUndoRedo;
    }

    void OnFocus()
    {
        // If we lost the graph view for any reason, rebuild it. Otherwise, reload to match the asset on disk.
        if (graphView == null)
        {
            graphAsset = LoadOrCreateGraph();
            ConstructGraphView();
        }
        else
        {
            graphView.Reload();
        }
    }

    FoldGraph LoadOrCreateGraph()
    {
        var asset = AssetDatabase.LoadAssetAtPath<FoldGraph>(GraphPath);
        if (asset == null)
        {
            asset = CreateInstance<FoldGraph>();
            AssetDatabase.CreateAsset(asset, GraphPath);
            AssetDatabase.SaveAssets();
        }

        return asset;
    }

    void ConstructGraphView()
    {
        graphView = new FoldGraphView(this, graphAsset)
        {
            name = "Fold Graph"
        };

        graphView.style.flexGrow = 1f;
        graphView.style.width = Length.Percent(100);
        graphView.style.height = Length.Percent(100);
        rootVisualElement.Add(graphView);
    }

    void OnUndoRedo()
    {
        graphView?.Reload();
    }

    public void ShowNotification(string message)
    {
        if (string.IsNullOrEmpty(message))
            return;

        ShowNotification(new GUIContent(message));
    }
}