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

// 选择单选或多选Project下素材，寻找在配置表中出现的位置
// 寻找位置为表中类型为 STRING 的列
// 结果存放位置：Application.streamingAssetsPath/FindTableByRes_Result.text
// Todo: 使用文件夹寻找/递归文件夹寻找
public class FindTableByRes
{
    private static List<string> targets = new List<string>();                                                           // 待找的素材名称(无后缀)
    private static List<int> keyWordIndexs = new List<int>();                                                           // 每个.tex文档的 string 列索引 
    private static Dictionary<int, List<string>> totalResult = new Dictionary<int, List<string>>();                     // 总的结果
    private static string tablePaht = Application.dataPath + "/Project3D/BundleData/Tables3D";                          // 表的路径
    private static string resultPath = Application.streamingAssetsPath + "/FindTableByRes_Result.txt";
    private static string[] searchPatterns = new string[] { "*.png" };

    private static int MaxTargetCount = 300;                                                                            // 最高允许的查询数目，数目过多会使等待时间增加。
    private static bool isNew = false;

    [MenuItem("ProTool/ResTool/UnUseRes", true)]
    private static bool Check()
    {
        if(Selection.objects.Length == 0)
        {
            return false;
        }
        else
        {
            return true;
        }
    }

    [MenuItem("ProTool/ResTool/UnUseRes")]
    static private void BeginTask()
    {
        isNew = true;
        Init();

        if(targets.Count > MaxTargetCount)
        {
            Debug.Log("Too much target , " + targets.Count);
            return;
        }

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

        string[] files = Directory.GetFiles(tablePaht, "*.txt");

        for (int t = 0; t < targets.Count; ++t)
        {
            if (string.IsNullOrEmpty(targets[t]))
            {
                return;
            }

            List<string> results = new List<string>();
            for (int i = 0; i < files.Length; ++i)
            {
                //Debug.Log("ProTool: working!");
                string[] lines = File.ReadAllLines(files[i]);
                if (lines.Length == 0)
                {
                    return;
                }

                keyWordIndexs.Clear();
                // 寻找关键列index
                string[] curColNames = lines[1].Split('\t');
                for (int j = 0; j < curColNames.Length; ++j)
                {
                    if (string.Compare(curColNames[j], "string", true) == 0)
                    {
                        keyWordIndexs.Add(j);
                    }
                }

                // 更具index查找相应名称
                if (keyWordIndexs.Count > 0)
                {
                    for (int j = 1; j < lines.Length; ++j)
                    {

                        if (lines[j][0] == '#')
                            continue;

                        string[] lineWords = lines[j].Split('\t');
                        for (int k = 0; k < keyWordIndexs.Count; ++k)
                        {
                            int index = keyWordIndexs[k];
                            if (string.Compare(lineWords[index], targets[t], true) == 0)
                            {
                                results.Add(files[i] + "\t" + "at line " + j.ToString());
                            }
                        }
                    }
                }
            }

            if (results.Count > 0)
            {
                totalResult.Add(t, results);
            }
            else
            {
                results.Add("None");
                totalResult.Add(t, results);
            }
        }

        OutputResult();
    }

    private static void Init()
    {
        targets.Clear();
        keyWordIndexs.Clear();
        totalResult.Clear();

        //for(int i = 0; i < Selection.assetGUIDs.Length; ++i)
        //{
        //    Debug.Log(AssetDatabase.GUIDToAssetPath(Selection.assetGUIDs[i]));
        //}

        foreach (UnityEngine.Object t in Selection.objects)
        {
            string path = AssetDatabase.GetAssetPath(t.GetInstanceID());
            string absolutePath = Application.dataPath.Substring(0, Application.dataPath.LastIndexOf('/')) + "/" + path + "/";
            if (Directory.Exists(absolutePath) == true)
            {
                for (int i = 0; i < searchPatterns.Length; ++i)
                {
                    string[] temp = Directory.GetFiles(absolutePath, searchPatterns[i], SearchOption.AllDirectories);
                    for(int j = 0; j < temp.Length; ++j)
                    {
                        targets.Add(GetName(temp[j]));
                    }
                }
            }
            else
            {
                targets.Add(t.name);
            }
        }
    }

    static private string GetName(string path)
    {
        string result;
        if (path.LastIndexOf('\\') != -1)
        {
            result = path.Substring(path.LastIndexOf('\\') + 1, path.LastIndexOf('.') - path.LastIndexOf('\\') - 1);
        }
        else
        {
            result = path.Substring(path.LastIndexOf('/') + 1, path.LastIndexOf('.') - path.LastIndexOf('/') - 1);
        }

        return result;
    }

    static private void OutputResult()
    {
        int resultCount = 0;
        foreach(KeyValuePair<int, List<string>> kv in totalResult)
        {
            resultCount += kv.Value.Count;
        }

        if(resultCount <= 5)
        {
            Debug.Log("ProTool: Done!");
            foreach (KeyValuePair<int, List<string>> kv in totalResult)
            {
                foreach (string s in kv.Value)
                {
                    Debug.Log(targets[kv.Key] + " : " + s);
                }
            }
        }
        else
        {
            try
            {
                FileStream fs = new FileStream(resultPath, FileMode.Create);
                StreamWriter sw = new StreamWriter(fs);

                // 优先输出为结果为空的素材
                foreach (KeyValuePair<int, List<string>> kv in totalResult)
                {
                    if(kv.Value[0] == "None")
                    {
                        sw.WriteLine(targets[kv.Key]);
                        sw.WriteLine("\t" + kv.Value[0]);
                        sw.Write("\n");
                    }
                }

                // 再输出结果不为空的素材
                foreach (KeyValuePair<int, List<string>> kv in totalResult)
                {
                    if (kv.Value[0] != "None")
                    {
                        sw.WriteLine(targets[kv.Key]);
                        foreach (string s in kv.Value)
                        {
                            sw.WriteLine("\t" + s);
                        }

                        sw.Write("\n");
                    }
                }

                sw.Close();
                fs.Close();
                Debug.Log("ProTool: Done!");
                Debug.Log("ProTool: Too much result, check at " + resultPath);
            }
            catch (Exception e)
            {
                Debug.Log(e.ToString());
            }
        }
    }
}