using UnityEditor;
using UnityEngine;
using System.IO;
using System.Linq;

public class PopupPreview : EditorWindow
{
    private GameObject[] prefabs;
    private int currentIndex = 0;
    private GameObject currentInstance;

    [MenuItem("Tools/Prefab Batch Viewer")]
    public static void ShowWindow()
    {
        GetWindow<PopupPreview>("Prefab Batch Viewer");
    }

    private void OnEnable()
    {
        string path = "Assets/WordConnectGameToolkit/Resources/Popups";
        string[] prefabPaths = Directory.GetFiles(path, "*.prefab", SearchOption.AllDirectories);
        prefabs = prefabPaths
            .Select(p => AssetDatabase.LoadAssetAtPath<GameObject>(p))
            .Where(p => p != null)
            .ToArray();
    }

    private void OnGUI()
    {
        if (prefabs == null || prefabs.Length == 0)
        {
            EditorGUILayout.LabelField("No prefabs found in Resources/Popups.");
            return;
        }

        EditorGUILayout.LabelField($"Prefab {currentIndex + 1}/{prefabs.Length}", EditorStyles.boldLabel);
        EditorGUILayout.ObjectField("Current Prefab", prefabs[currentIndex], typeof(GameObject), false);

        GUILayout.Space(10);

        EditorGUILayout.BeginHorizontal();
        if (GUILayout.Button("Previous"))
        {
            ShowPreviousPrefab();
        }
        if (GUILayout.Button("Next"))
        {
            ShowNextPrefab();
        }
        EditorGUILayout.EndHorizontal();

        GUILayout.Space(10);

        if (currentInstance == null)
        {
            if (GUILayout.Button("Instantiate in Scene"))
            {
                InstantiateCurrentPrefab();
            }
        }
        else
        {
            if (GUILayout.Button("Remove Instance"))
            {
                DestroyImmediate(currentInstance);
            }
        }
    }

    private void ShowPreviousPrefab()
    {
        currentIndex = (currentIndex - 1 + prefabs.Length) % prefabs.Length;
        InstantiateCurrentPrefab();
    }

    private void ShowNextPrefab()
    {
        currentIndex = (currentIndex + 1) % prefabs.Length;
        InstantiateCurrentPrefab();
    }

    private void InstantiateCurrentPrefab()
    {
        if (currentInstance != null)
        {
            DestroyImmediate(currentInstance);
        }

        currentInstance = (GameObject)PrefabUtility.InstantiatePrefab(prefabs[currentIndex]);
        currentInstance.name = prefabs[currentIndex].name + "_Preview";
        Selection.activeGameObject = currentInstance;
    }
}