#if UNITY_EDITOR

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

public class AssetPreviewSaver : MonoBehaviour
{
    [MenuItem("Tools/Save Asset Previews")]
    private static void SaveAssetPreviews()
    {
        string path = "Assets/AssetPreviews";
        if (!Directory.Exists(path))
            Directory.CreateDirectory(path);

        foreach (var obj in Selection.objects)
        {
            Texture2D preview = AssetPreview.GetAssetPreview(obj);
            if (preview != null)
            {
                byte[] bytes = preview.EncodeToPNG();
                File.WriteAllBytes($"{path}/{obj.name}_Preview.png", bytes);
            }
            else
            {
                Debug.LogWarning($"No preview available for {obj.name}");
            }
        }

        AssetDatabase.Refresh();
        Debug.Log("Asset previews saved to " + path);
    }
    [MenuItem("Tools/Save High Quality Asset Previews")]
    private static void SaveHighQualityPreviews()
    {
        string path = "Assets/Resources/Prefabs/Item/Preview";
        if (!Directory.Exists(path))
            Directory.CreateDirectory(path);

        foreach (var obj in Selection.objects)
        {
            GameObject prefab = obj as GameObject;
            if (prefab == null) continue;

            GameObject instance = Instantiate(prefab);
            instance.transform.localScale = new Vector3(3, 3, 3);
            Camera camera = new GameObject("PreviewCamera").AddComponent<Camera>();
            camera.backgroundColor = Color.clear;
            camera.clearFlags = CameraClearFlags.SolidColor;
            camera.orthographic = false;
            camera.fieldOfView = 60f;
            
            // Bounds bounds = CalculateBounds(instance);
            camera.transform.position = new Vector3(-0.981999993f,0.720000029f,0.717000008f);
            camera.transform.rotation = Quaternion.Euler(25.430006f,107.999992f,359.778992f);
            RenderTexture rt = new RenderTexture(1080, 1080, 24);
            camera.targetTexture = rt;
            Texture2D screenshot = new Texture2D(1080, 1080, TextureFormat.ARGB32, false);

            camera.Render();
            RenderTexture.active = rt;
            screenshot.ReadPixels(new Rect(0, 0, 1080, 1080), 0, 0);
            screenshot.Apply();

            byte[] bytes = screenshot.EncodeToPNG();
            File.WriteAllBytes($"{path}/{obj.name}.png", bytes);

            // Clean up
            DestroyImmediate(instance);
            DestroyImmediate(camera.gameObject);
            RenderTexture.active = null;
            rt.Release();
        }

        AssetDatabase.Refresh();
        Debug.Log("High-quality previews saved to " + path);
    }
    [MenuItem("Tools/Render Prefab Preview")]
    private static void RenderPrefabPreviewFromScene()
    {
        static void RenderPreview(GameObject prefabObject)
        {
            Camera camera = FindObjectOfType<Camera>();
            if (camera == null)
            {
                return;
            }
            int resolution = 1080;
            RenderTexture rt = new RenderTexture(resolution, resolution, 24);
            camera.targetTexture = rt;
            camera.Render();
            Texture2D screenshot = new Texture2D(resolution, resolution, TextureFormat.ARGB32, false);
            RenderTexture.active = rt;
            screenshot.ReadPixels(new Rect(0, 0, resolution, resolution), 0, 0);
            screenshot.Apply();
            string path = $"Assets/Resources/Prefabs/Item/Preview/Sprite_{prefabObject.name}.png";
            System.IO.File.WriteAllBytes(path, screenshot.EncodeToPNG());
            camera.targetTexture = null;
            RenderTexture.active = null;
            DestroyImmediate(rt);
            AssetDatabase.Refresh();
            Debug.Log($"Preview saved for {prefabObject.name} at {path}");
        }
        static GameObject[] GetRootObjects()
        {
            return GameObject.FindObjectsOfType<GameObject>()
                .Where(obj => obj.transform.parent == null)
                .ToArray();
        }

        GameObject[] allObjects = GetRootObjects();
        GameObject prefabObject = null;
        foreach (GameObject obj in allObjects)
        {
            if (obj.GetComponent<Camera>() == null && obj.GetComponent<Light>() == null)
            {
                prefabObject = obj;
                break;
            }
        }
        if (prefabObject != null)
        {
            string prefabName = prefabObject.name;
            Debug.Log($"Found prefab: {prefabName}");
            RenderPreview(prefabObject);
        }
    }
}
#endif