using UnityEngine;
using UnityEditor;
using System.Collections.Generic;

public class InstantiateQuadsEditor : EditorWindow
{
    [MenuItem("Tools/Instantiate Quads")]
    public static void ShowWindow()
    {
        GetWindow<InstantiateQuadsEditor>("Instantiate Quads");
    }

    private GameObject parentObject; // 父对象
    private GameObject prefab;
    private int hor = 3; // 水平分割数量
    private int ver = 2; // 垂直分割数量

    void OnGUI()
    {
        GUILayout.Label("Instantiate Quads Settings", EditorStyles.boldLabel);

        // 显示父对象选择器
        parentObject = (GameObject)EditorGUILayout.ObjectField("Parent Object", parentObject, typeof(GameObject), true);

        // 显示Prefab选择器
        prefab = (GameObject)EditorGUILayout.ObjectField("Prefab", prefab, typeof(GameObject), false);

        // 显示水平和垂直分割数量输入框
        hor = EditorGUILayout.IntField("Horizontal Splits", hor);
        ver = EditorGUILayout.IntField("Vertical Splits", ver);

        // 添加按钮
        if (GUILayout.Button("Instantiate Quads"))
        {
            if (parentObject == null)
            {
                Debug.LogError("Parent Object is not assigned.");
                return;
            }

            InstantiateQuads(prefab, hor, ver, parentObject.transform);
        }
    }

    private Material CreateAndSaveMaterial(Texture texture, string assetFolderPath)
    {
        if (texture == null)
        {
            Debug.LogError("Texture is null");
            return null;
        }

        // 确保 assetFolderPath 是有效的 Unity 文件夹路径
        if (string.IsNullOrEmpty(assetFolderPath) || !AssetDatabase.IsValidFolder(assetFolderPath))
        {
            Debug.LogError("Invalid asset folder path: " + assetFolderPath);
            return null;
        }

        // 创建一个新的材质
        Material mat = new Material(Shader.Find("Unlit/Texture"));

        if (mat == null)
        {
            Debug.LogError("Shader 'Unlit/Texture' not found");
            return null;
        }

        // 设置材质的纹理
        mat.mainTexture = texture;

        // 为材质创建一个唯一的名称
        string materialName = "Material_" + texture.name;

        // 生成材质的路径
        string materialPath = AssetDatabase.GenerateUniqueAssetPath(System.IO.Path.Combine(assetFolderPath, materialName + ".mat"));

        // 保存材质为 Asset
        AssetDatabase.CreateAsset(mat, materialPath);

        // 刷新 Asset 数据库
        AssetDatabase.Refresh();

        // 检查是否成功创建
        Material createdMat = AssetDatabase.LoadAssetAtPath<Material>(materialPath);
        if (createdMat == null)
        {
            Debug.LogError("Failed to create material at path: " + materialPath);
        }

        return createdMat;
    }

    private void InstantiateQuads(GameObject prefab, int hor, int ver, Transform parent)
    {
        //// 加载所有纹理
        //Texture[] textures = Resources.LoadAll<Texture>("L14");

        if (prefab == null)
        {
            Debug.LogError("Prefab is not assigned.");
            return;
        }

        for (int i = 0; i < hor; i++)
        {
            for (int j = 0; j < ver; j++)
            {
                Texture texture = Resources.Load<Texture>("L16/GCJ02_L16_18x18" + i + "_" + j);
                float startJ = 0 - (hor / 2.0f) + 0.5f;
                float starti = 0 + (ver / 2.0f) - 0.5f;
                // 实例化Prefab
                GameObject quad = Instantiate(prefab, parent);
                quad.name = "L16" + i.ToString() + "_" + j.ToString();

                // 设置位置
                Vector3 localPosition = new Vector3(startJ + j, starti - i, 0);
                quad.transform.localPosition = localPosition;

                // 为每个实例化的对象创建新的材质，并保存为Asset
                Material mat = CreateAndSaveMaterial(texture, "Assets/Art/Material/Minimap/L16");
                quad.GetComponent<MeshRenderer>().material = mat;
            }
        }
    }
}