using AX.NetworkSystem;
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using System.Xml;
using UnityEngine;

public class CreateMD5Tool
{
    private static CreateMD5Tool instance;
    public static CreateMD5Tool Instance
    {
        get
        {
            if (instance == null)
            {
                instance = new CreateMD5Tool();                
            }
            return instance;
        }
    }
	
    /// <summary>
    /// 创建配置文件
    /// </summary>
    /// <param name="directoryPath">需要生成MD5文件的路径</param>
    /// <param name="fileVersionPath">生成MD5的配置文件</param>
    /// <param name="data"></param>
	public void CreateManifestXml(string directoryPath, string fileVersionPath, Dictionary<string, string> data)
    {
        setFileXML(directoryPath, fileVersionPath, data);
    }
    public void CreateManifestXml(string directoryPath, string fileVersionPath)
    {
        var data = new Dictionary<string, string>();
        setFileXML(directoryPath, fileVersionPath, data);
    }

    private void setFileXML(string directoryPath, string fileVersionPath, Dictionary<string, string> data)
    {
        if (Directory.Exists(directoryPath))
        {
            string[] strArray = Directory.GetFiles(directoryPath, "*", SearchOption.AllDirectories);
            for (int i = 0; i < strArray.Length; i++)
            {
                if (!strArray[i].EndsWith(".meta") && !strArray[i].EndsWith(".manifest"))
                {
                    string key = strArray[i].Replace(directoryPath, string.Empty);
                    //排除掉地图文件，地图资源单独更新，因此在进行版本更新时不需要更新地图资源，所以在生成资源配置表时剔除掉地图资源
                    if (!key.Contains(@"\AssetBundles\assets\mapfiles"))
                    {
                        string str = this.getFileHash(strArray[i]);
                        data.Add(key, str);
                    }
                }
            }
            SaveVersionFile(data, fileVersionPath);
        }
    }
    /// <summary>
    /// 测试用：将文件夹内的所有文件（除xml外）上传到服务器
    /// </summary>
    /// <param name="directoryPath"></param>
    public void UploadDirectoryFiles(string directoryPath,string id)
    {
        if (Directory.Exists(directoryPath))
        {
            string[] strArray = Directory.GetFiles(directoryPath, "*", SearchOption.AllDirectories);
            for(int i = 0; i < strArray.Length; i++)
            {
                if(!strArray[i].EndsWith(".xml") && !strArray[i].EndsWith(".meta") && !strArray[i].EndsWith(".manifest"))
                {
                    string fileName = strArray[i].Replace(directoryPath, id + "/");
                    NetworkManager.Default.UploadFileAsync(strArray[i], fileName, null, null, OnUploadCompelete);
                }                
            }            
        }
    }

    private void OnUploadCompelete(string fullName, string fileName)
    {
        Debug.Log("已将" + fullName + "上传至服务器，文件名：" + fileName);
    }

    //获取文件的MD5
    private string getFileHash(string filePath)
    {
        try
        {
            FileStream stream = new FileStream(filePath, FileMode.Open);
            int length = (int)stream.Length;
            byte[] buffer = new byte[length];
            stream.Read(buffer, 0, length);
            stream.Close();
            byte[] buffer2 = new MD5CryptoServiceProvider().ComputeHash(buffer);
            string str = string.Empty;
            foreach (byte num2 in buffer2)
            {
                str = str + Convert.ToString(num2, 0x10);
            }
            return str;
        }
        catch (FileNotFoundException exception)
        {
            Console.WriteLine(exception.Message);
            return string.Empty;
        }
    }
    //保存资源版本配置文件
    private void SaveVersionFile(Dictionary<string, string> data,string fileVersionPath)
    {
        if (File.Exists(fileVersionPath))
        {
            File.Delete(fileVersionPath);
        }
        XmlDocument document = new XmlDocument();
        XmlDeclaration xmldecl = document.CreateXmlDeclaration("1.0", "UTF-8", "yes");
        document.AppendChild(xmldecl);
        XmlElement newChild = document.CreateElement("Files");
        document.AppendChild(newChild);
        foreach (KeyValuePair<string, string> pair in data)
        {
            XmlElement element2 = document.CreateElement("File");
            newChild.AppendChild(element2);
            element2.SetAttribute("FileName", pair.Key);
            element2.SetAttribute("Hash", pair.Value);
        }
        document.Save(fileVersionPath);
        document = null;
    }
    //获取xml文件版本信息
    private Dictionary<string, string> getMainFileVersion(string path)
    {
        Dictionary<string, string> fileHashID = new Dictionary<string, string>();
        XmlDocument document = new XmlDocument();
        document.Load(path);
        XmlNodeList nodeList = document.SelectSingleNode("Files").ChildNodes;
        foreach (XmlElement fileNode in nodeList)
        {
            var fileName = fileNode.GetAttribute("FileName");
            var fileHash = fileNode.GetAttribute("Hash");
            fileHashID.Add(fileName, fileHash);
        }
        document = null;
        return fileHashID;
    }
    public SaveData CheckUpdate(string preFileXml,string curFileXml)
    {
        SaveData data = new SaveData();
        //获取本地的HashID
        Dictionary<string, string> preHashID = getMainFileVersion(preFileXml);
        //获取最新的HashID
        Dictionary<string, string> curHashID = getMainFileVersion(curFileXml);
       
       foreach(string fileName in curHashID.Keys)
        {
            //1、先判断本地资源列表是否存在,若不存在则属于新资源
            if (!preHashID.ContainsKey(fileName))
            {
                data.updateList.Add(fileName);
            }
            //2、再判断HashID是否相等,若不等则属于新资源
            else if (preHashID[fileName] != curHashID[fileName]) 
            {
                data.updateList.Add(fileName);
            }
        }
       foreach(string fileName in preHashID.Keys)
        {
            //若不存在则属于应删除的资源
            if (!curHashID.ContainsKey(fileName))
            {
                data.delList.Add(fileName);
            }
        }
        return data;
    }
    /// <summary>
    /// 文件移动
    /// </summary>
    /// <param name="sourceFile"></param>
    /// <param name="targetFile"></param>
    public void FileMove(string sourceFile, string targetFile)
    {
        if (File.Exists(targetFile))
        {
            File.Delete(targetFile);
        }
        else
        {
            string directoryName = Path.GetDirectoryName(targetFile);
            if (!Directory.Exists(directoryName) && directoryName != "")
            {
                Directory.CreateDirectory(directoryName);
            }
        }
        try
        {
            File.Move(sourceFile, targetFile);
        }
        catch (Exception exception)
        {
            Debug.LogError(exception.Message);
        }
    }
}
public class SaveData
{
    public List<string> updateList;
    public List<string> delList;
    public SaveData()
    {
        updateList = new List<string>();
        delList = new List<string>();
    }
}