namespace AtlasUtility
{
    using UnityEditor;
    using UnityEngine;
    using UnityEditor.SceneManagement;

    using System;
    using System.IO;
    using System.Linq;
    using System.Collections.Generic;
    using System.Text.RegularExpressions;

    public class ReferenceManager
    {
        public static void FindReference(string path)
        {
            SerializationMode userSerializationMode = EditorSettings.serializationMode;

            EditorSettings.serializationMode = SerializationMode.ForceText;

            string guid = AssetDatabase.AssetPathToGUID(path);

            List<string> pathList = GetAllFile(true);

            for (int i = 0; i < pathList.Count; i++)
            {
                EditorUtility.DisplayProgressBar("匹配", pathList[i], (i + 1) / (float)pathList.Count);

                int count = Regex.Matches(File.ReadAllText(pathList[i]), guid).Count;

                if (count > 0)
                {
                    Debug.LogWarning($"{count}处引用 {pathList[i].GetRelativePath()}");
                }
            }

            EditorUtility.ClearProgressBar();

            EditorSettings.serializationMode = userSerializationMode;
        }

        public static void ChangeReference(bool includeMaterial, List<string> fromList, List<string> toList)
        {
            if (fromList.Count != toList.Count)
            {
                throw new Exception("遇到一个Bug");
            }

            if (fromList.Count == 0)
            {
                return;
            }

            AssetDatabase.SaveAssets();
            EditorSceneManager.SaveOpenScenes();

            SerializationMode userSerializationMode = EditorSettings.serializationMode;

            EditorSettings.serializationMode = SerializationMode.ForceText;

            List<string> pathList = GetAllFile(includeMaterial);

            for (int i = 0; i < pathList.Count; i++)
            {
                EditorUtility.DisplayProgressBar("修改引用", Path.GetFileNameWithoutExtension(pathList[i]), (i + 1) / (float)pathList.Count);

                string originText = File.ReadAllText(pathList[i]);
                string newText = originText;

                for (int j = 0; j < fromList.Count; j++)
                {
                    newText = newText.Replace(fromList[j], toList[j]);
                }

                if (newText != originText)
                {
                    File.WriteAllText(pathList[i], newText);
                }
            }

            EditorUtility.ClearProgressBar();

            EditorSettings.serializationMode = userSerializationMode;

            AssetDatabase.Refresh();
        }


        public static List<string> GetAllFile(bool includeMaterial)
        {
            List<string> searchExtension = new List<string>()
            {
                ".asset",
                ".anim",
                ".unity",
                ".prefab"
            };

            if (includeMaterial)
            {
                searchExtension.Add(".mat");
            }

            List<string> pathList = Directory.GetFiles(Application.dataPath, "*.*", SearchOption.AllDirectories).Where
                (
                    path =>
                    {
                        string extension = Path.GetExtension(path);

                        if (searchExtension.Contains(extension))
                        {
                            return true;
                        }
                        else
                        {
                            return false;
                        }
                    }
                )
                .ToList();

            return pathList;
        }

        public static List<string> GetChildSpritePath(string atlasPath)
        {
            string atlasGUID = AssetDatabase.AssetPathToGUID(atlasPath);

            List<string> spritePathList = new List<string>();

            List<AtlasReferencePair> referencePairList = AtlasReferenceTable.ReadAllLine();

            foreach (var referencePair in referencePairList)
            {
                AtlasReference atlasReference = referencePair.AtlasReference;
                AtlasReference sourceAtlasReference = referencePair.SourceAtlasReference;

                if (atlasReference.GUID == atlasGUID)
                {
                    spritePathList.Add(AssetDatabase.GUIDToAssetPath(sourceAtlasReference.GUID));
                }
            }

            return spritePathList;
        }
    }
}