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

public class PrefabTool : EditorWindow
{
    [MenuItem("Prefab Tool/Check Missing Scripts")]
    static void CheckMissingScripts()
    {
        List<string> listString = new List<string>();

        CollectFiles(Application.dataPath, listString);

        for (int i = 0; i < listString.Count; i++)
        {
            string Path = listString[i];

            float progressBar = (float)i / listString.Count;

            EditorUtility.DisplayProgressBar("Check Missing Scripts", "The progress of ： " + ((int)(progressBar * 100)).ToString() + "%", progressBar);

            if (!Path.EndsWith(".prefab"))//只處理prefab文件
            {
                continue;
            }

            Path = ChangeFilePath(Path);

            AssetImporter tmpAssetImport = AssetImporter.GetAtPath(Path);

            GameObject prefab = AssetDatabase.LoadAssetAtPath<GameObject>(tmpAssetImport.assetPath);

            if (prefab == null)
            {
                Debug.LogError("空的預設 ： " + tmpAssetImport.assetPath);

                continue;
            }

            Transform[] transforms = prefab.GetComponentsInChildren<Transform>();
            //獲取所有的子節點;

            for (int j = 0; j < transforms.Length; j++)
            {
                GameObject obj = transforms[j].gameObject;

                var components = obj.GetComponents<Component>();
                //獲取對象所有的Component組件
                //所有繼承MonoBehaviour的腳本都繼承Component

                for (int k = 0; k < components.Length; k++)
                {
                    if (components[k] == null)
                    {
                        Debug.LogError("這個預制中有空的腳本 ：" + tmpAssetImport.assetPath + " 掛在對象 : " + obj.name + " 上");
                    }
                }
            }
        }
        EditorUtility.ClearProgressBar();
    }

    //改變路徑  
    //這種格式的路徑 "C:/Users/XX/Desktop/aaa/New Unity Project/Assets\a.prefab" 改變成 "Assets/a.prefab"
    static string ChangeFilePath(string path)
    {
        path = path.Replace("\\", "/");
        path = path.Replace(Application.dataPath + "/", "");
        path = "Assets/" + path;

        return path;
    }

    //迭代獲取文件路徑;
    static void CollectFiles(string directory, List<string> outfiles)
    {
        string[] files = Directory.GetFiles(directory);

        outfiles.AddRange(files);

        string[] childDirectories = Directory.GetDirectories(directory);

        if (childDirectories != null && childDirectories.Length > 0)
        {
            for (int i = 0; i < childDirectories.Length; i++)
            {
                string dir = childDirectories[i];
                if (string.IsNullOrEmpty(dir)) continue;
                CollectFiles(dir, outfiles);
            }
        }
    }
}