using Microsoft.AspNetCore.Mvc;
using Cksoft.Data;
using Cksoft.Data.Repository;
using Cksoft.Unity;
using Microsoft.AspNetCore.Hosting;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using WebApplet.Models;
using System.Security.Cryptography;
using System.Text;
using System.Collections;
using Microsoft.Extensions.Logging;
using System.Xml;
using Newtonsoft.Json;

namespace WebApplet.Controllers
{
    [Route("eap/api/[controller]/[action]")]
    public class CompareVersionController : ControllerBase
    {
        private readonly IHostingEnvironment _hostingEnvironment;
        private ILogger<CompareVersionController> myloger = null;
        public CompareVersionController(IHostingEnvironment hostingEnvironment, ILogger<CompareVersionController> ploger)
        {
            myloger = ploger;
            _hostingEnvironment = hostingEnvironment;
        }
        /// <summary>
        /// 比较是否需要更新文件
        /// </summary>
        /// <param name="programMst"></param>
        /// <returns></returns>
        public EapResponse CheckVersion([FromBody] CompareVersion programMst)
        {
            Hashtable ht2 = programMst.Versions;
            var response = new EapResponse() { Code = 1, Msg = string.Empty };
            try
            {
                string path = $"/WebApp/update";
                string phyicPath = _hostingEnvironment.WebRootPath + path;
                this.CreateDirectory(phyicPath);
                Hashtable hashtable = new Hashtable();
                DirectoryInfo folder = new DirectoryInfo(phyicPath);
                foreach (FileInfo file in folder.GetFiles("*.*"))
                {
                    hashtable[file.Name] = GetMD5HashFromFile(file.FullName);
                }
                if (hashtable.Count > 0)
                {
                    foreach (string key in hashtable.Keys)
                    {
                        if (ht2.Contains(key))
                        {
                            if (ht2[key].ToString() != hashtable[key].ToString())
                            {
                                response.Code = -1;
                                break;
                            }
                        }
                        else
                        {
                            response.Code = -1;
                            break;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                myloger.LogError(ex.ToString() + ex.StackTrace);
            }
            return response;
        }
        /// <summary>
        /// 比较是否需要下载文件，需要的传文件流
        /// </summary>
        /// <param name="programMst"></param>
        /// <returns></returns>
        public EapResponse CheckVersionName([FromBody] CompareVersion programMst)
        {
            Hashtable ht2 = programMst.Versions;
            var response = new EapResponse() { Code = 1, Msg = string.Empty };
            try
            {
                string path = $"/WebApp/update";
                string phyicPath = _hostingEnvironment.WebRootPath + path;
                this.CreateDirectory(phyicPath);
                Hashtable hashtable = new Hashtable();
                DirectoryInfo folder = new DirectoryInfo(phyicPath);
                Hashtable names = new Hashtable();
                foreach (FileInfo file in folder.GetFiles("*.*"))
                {
                    hashtable[file.Name] = GetMD5HashFromFile(file.FullName);
                }
                if (hashtable.Count > 0)
                {
                    foreach (string key in hashtable.Keys)
                    {
                        if (ht2 != null && ht2.Contains(key))
                        {
                            if (ht2[key].ToString() != hashtable[key].ToString())
                            {
                                names[key] = getInfo(phyicPath + @"/" + key);
                            }
                        }
                        else
                        {
                            names[key] = getInfo(phyicPath + @"/" + key);
                        }
                    }
                }
                response.Data = names;
            }
            catch (Exception ex)
            {
                myloger.LogError(ex.ToString() + ex.StackTrace);
            }
            return response;
        }

        [HttpPost]
        public EapResponse DownloadAppFile([FromBody] CompareVersion programMst)
        {
            Hashtable ht2 = programMst.Versions;
            var response = new EapResponse() { Code = 1, Msg = string.Empty };
            try
            {
                string path = $"/WebApp/v3";
                string phyicPath = _hostingEnvironment.WebRootPath + path;
                this.CreateDirectory(phyicPath);
                Hashtable hashtable = new Hashtable();
                DirectoryInfo folder = new DirectoryInfo(phyicPath);
                Hashtable names = new Hashtable();
                foreach (FileInfo file in folder.GetFiles("*.*"))
                {
                    hashtable[file.Name] = GetMD5HashFromFile(file.FullName);
                }
                if (hashtable.Count > 0)
                {
                    foreach (string key in hashtable.Keys)
                    {
                        if (ht2 != null && ht2.Contains(key))
                        {
                            if (ht2[key].ToString() != hashtable[key].ToString())
                            {
                                names[key] = getInfo(phyicPath + @"/" + key);
                            }
                        }
                        else
                        {
                            names[key] = getInfo(phyicPath + @"/" + key);
                        }
                    }
                }
                response.Data = names;
            }
            catch (Exception ex)
            {
                myloger.LogError(ex.ToString() + ex.StackTrace);
            }
            return response;
        }

        /// <summary>
        /// 获取远端APP版本
        /// </summary>
        /// <param name="version"></param>
        /// <returns></returns>
        public async Task<EapResponse> GetAppVersion()
        {
            var versionPath = Path.Combine(_hostingEnvironment.WebRootPath, "WebApp",
                "v3", "version.json");
            var file = new FileInfo(versionPath);
            var fs = file.OpenRead();
            var sr = new StreamReader(fs);
            var str = await sr.ReadToEndAsync();
            fs.Close();
            fs.Dispose();
            var webAppVersion = JsonConvert.DeserializeObject<WebAppVersion>(str);
            return new EapResponse { Code = 1, Data = webAppVersion };
        }

        /// <summary>
        /// 获取远端更新程序版本
        /// </summary>
        /// <param name="version"></param>
        /// <returns></returns>
        public async Task<EapResponse> GetUpdateAppVersion()
        {
            var versionPath = Path.Combine(_hostingEnvironment.WebRootPath, "WebApp",
                "UpdateApp", "update-version.json");
            var file = new FileInfo(versionPath);
            var fs = file.OpenRead();
            var sr = new StreamReader(fs);
            var str = await sr.ReadToEndAsync();
            fs.Close();
            fs.Dispose();
            var webAppVersion = JsonConvert.DeserializeObject<WebAppVersion>(str);
            return new EapResponse { Code = 1, Data = webAppVersion };
        }

        [HttpPost]
        public EapResponse DownloadUpdateAppFile([FromBody] CompareVersion programMst)
        {
            Hashtable ht2 = programMst.Versions;
            var response = new EapResponse() { Code = 1, Msg = string.Empty };
            try
            {
                string path = $"/WebApp/UpdateApp";
                string phyicPath = _hostingEnvironment.WebRootPath + path;
                this.CreateDirectory(phyicPath);
                Hashtable hashtable = new Hashtable();
                DirectoryInfo folder = new DirectoryInfo(phyicPath);
                Hashtable names = new Hashtable();
                foreach (FileInfo file in folder.GetFiles("*.*"))
                {
                    hashtable[file.Name] = GetMD5HashFromFile(file.FullName);
                }
                if (hashtable.Count > 0)
                {
                    foreach (string key in hashtable.Keys)
                    {
                        if (ht2 != null && ht2.Contains(key))
                        {
                            if (ht2[key].ToString() != hashtable[key].ToString())
                            {
                                names[key] = getInfo(phyicPath + @"/" + key);
                            }
                        }
                        else
                        {
                            names[key] = getInfo(phyicPath + @"/" + key);
                        }
                    }
                }
                response.Data = names;
            }
            catch (Exception ex)
            {
                myloger.LogError(ex.ToString() + ex.StackTrace);
            }
            return response;
        }

        public string getInfo(string filePath)
        {
            try
            {
                using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
                {
                    BinaryReader r = new BinaryReader(fs);
                    byte[] fileArray = r.ReadBytes((int)fs.Length);
                    return Convert.ToBase64String(fileArray);
                }
            }
            catch (Exception ex)
            {
                myloger.LogError(ex.ToString());
                return null;
            }
        }

        private void CreateDirectory(string path)
        {
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
        }
        public string GetMD5HashFromFile(string fileName)
        {
            try
            {
                using (FileStream file = new FileStream(fileName, System.IO.FileMode.Open, FileAccess.Read))
                {
                    MD5 md5 = new MD5CryptoServiceProvider();
                    byte[] retVal = md5.ComputeHash(file);

                    StringBuilder sb = new StringBuilder();
                    for (int i = 0; i < retVal.Length; i++)
                    {
                        sb.Append(retVal[i].ToString("x2"));
                    }
                    return sb.ToString();
                }
            }
            catch (Exception ex)
            {
                myloger.LogError("GetMD5HashFromFile() fail,error:" + ex.Message);
                return null;
            }
        }
    }
}