using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Net.Mail;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using Microsoft.VisualBasic;

namespace CB.Common
{
    public class Utils
    {
        /// <summary>
        /// 记录日志
        /// </summary>
        /// <param name="msg"></param>
        public static void WriteLog(string msg)
        {
            string path = AppDomain.CurrentDomain.BaseDirectory + "\\Log.txt";
            using (StreamWriter sw = new StreamWriter(path, true))
            {
                sw.WriteLine(System.DateTime.Now.ToString() + "	" + msg);
                sw.Close();
            }
        }

        #region Post With Pic
        /// <summary>
        /// HTTP POST方式请求数据(带图片)
        /// </summary>
        /// <param name="url">URL</param>        
        /// <param name="param">POST的数据</param>
        /// <param name="fileByte">图片</param>
        /// <returns></returns>
        public static string HttpPost(string url, Dictionary<string, object> param, byte[] fileByte)
        {
            string boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x");
            byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");

            HttpWebRequest wr = (HttpWebRequest)WebRequest.Create(url);
            wr.ContentType = "multipart/form-data; boundary=" + boundary;
            wr.Method = "POST";
            wr.KeepAlive = true;
            wr.Credentials = System.Net.CredentialCache.DefaultCredentials;

            Stream rs = wr.GetRequestStream();
            string responseStr = null;

            string formdataTemplate = "Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
            foreach (string key in param.Keys)
            {
                rs.Write(boundarybytes, 0, boundarybytes.Length);
                string formitem = string.Format(formdataTemplate, key, param[key]);
                byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
                rs.Write(formitembytes, 0, formitembytes.Length);
            }
            rs.Write(boundarybytes, 0, boundarybytes.Length);

            string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n";
            string header = string.Format(headerTemplate, "pic", fileByte, "text/plain");
            byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
            rs.Write(headerbytes, 0, headerbytes.Length);

            rs.Write(fileByte, 0, fileByte.Length);

            byte[] trailer = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "--\r\n");
            rs.Write(trailer, 0, trailer.Length);
            rs.Close();

            WebResponse wresp = null;
            try
            {
                wresp = wr.GetResponse();
                Stream stream2 = wresp.GetResponseStream();
                StreamReader reader2 = new StreamReader(stream2);
                responseStr = reader2.ReadToEnd();
            }
            catch
            {
                throw;
            }
            finally
            {
                if (wresp != null)
                {
                    wresp.Close();
                    wresp = null;
                }
                wr = null;
            }
            return responseStr;
        }

        /// <summary>
        /// http POST请求url
        /// </summary>
        /// <param name="url">请求地址</param>
        /// <param name="postData">POST数据</param>
        /// <returns></returns>
        public static string GetHttpWebResponse(string url, string postData)
        {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.ContentLength = postData.Length;
            request.Timeout = 10000;

            HttpWebResponse response = null;

            try
            {
                StreamWriter swRequestWriter = new StreamWriter(request.GetRequestStream());
                swRequestWriter.Write(postData);

                if (swRequestWriter != null)
                    swRequestWriter.Close();

                response = (HttpWebResponse)request.GetResponse();
                using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
                {
                    return reader.ReadToEnd();
                }
            }
            catch { return ""; }
            finally
            {
                if (response != null)
                    response.Close();
            }
        }
        #endregion

        /// <summary>
        /// AppSetting 配置节点值
        /// </summary>
        /// <param name="key"></param>
        /// <returns></returns>
        public static string GetAppSeting(string key)
        {

            try
            { return new System.Configuration.AppSettingsReader().GetValue(key, typeof(string)).ToString(); }
            catch
            { return string.Empty; }
        }

        /// <summary>
        /// 返回字串长度
        /// 汉字=2
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static int GetStringLength(string str)
        {
            return Encoding.Default.GetBytes(str).Length;
        }

        /// <summary>
        /// 取指定长度的字符串
        /// </summary>
        /// <param name="p_SrcString">要检查的字符串</param>
        /// <param name="p_StartIndex">起始位置</param>
        /// <param name="p_Length">指定长度</param>
        /// <param name="p_TailString">用于替换的字符串</param>
        /// <returns>截取后的字符串</returns>
        public static string GetSubString(string SrcString, int maxLength, string replaceStr = "")
        {
            string myResult = SrcString;

            if (0 >= maxLength)
                return myResult;

            byte[] bsSrcString = Encoding.Default.GetBytes(myResult);
            if (maxLength >= bsSrcString.Length)
                return myResult;

            int p_EndIndex = maxLength;

            int nRealLength = p_EndIndex;
            int[] anResultFlag = new int[p_EndIndex];
            byte[] bsResult = null;

            int nFlag = 0;
            for (int i = 0; i < p_EndIndex; i++)
            {
                if (bsSrcString[i] > 127)
                {
                    nFlag++;
                    if (nFlag == 3)
                        nFlag = 1;
                }
                else
                    nFlag = 0;

                anResultFlag[i] = nFlag;
            }

            if ((bsSrcString[p_EndIndex - 1] > 127) && (anResultFlag[p_EndIndex - 1] == 1))
                nRealLength = p_EndIndex + 1;

            bsResult = new byte[nRealLength];
            Array.Copy(bsSrcString, 0, bsResult, 0, nRealLength);
            myResult = Encoding.Default.GetString(bsResult);
            return myResult + replaceStr;
        }

        /// <summary>
        /// 网站域名
        /// </summary>
        /// <returns></returns>
        public static string GetHostDomain()
        {
            return GetUrlDomainName(HttpContext.Current.Request.Url.AbsoluteUri);
        }

        /// <summary>
        /// 返回url的根域名
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static string GetUrlDomainName(string url)
        {
            string p = @"^https?://(?<domain>[^/]+)(/|$)";
            Regex reg = new Regex(p, RegexOptions.IgnoreCase);
            Match m = reg.Match(url);
            return m.Groups["domain"].Value.ToString().Trim();
        }

        /// <summary>
        /// 返回URL中结尾的文件名
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static string GetUrlFileName(string url)
        {
            if (string.IsNullOrEmpty(url))
                return "";
            string[] str = url.Split('/');
            return str[str.Length - 1].Split('?')[0];
        }

        /// <summary>
        /// 根据字符长度，返回n个*号
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static string GetStar(string str)
        {
            int len = str.Length;
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < len; i++)
            {
                sb.Append("*");
            }
            return sb.ToString();
        }

        /// <summary>
        /// 将IP地址转为整数形式
        /// </summary>
        /// <returns>整数</returns>
        public static long IP2Long(IPAddress ip)
        {
            int x = 3;
            long o = 0;
            foreach (byte f in ip.GetAddressBytes())
            {
                o += (long)f << 8 * x--;
            }
            return o;
        }

        /// <summary>
        /// 将整数转为IP地址
        /// </summary>
        /// <returns>IP地址</returns>
        public static IPAddress Long2IP(long l)
        {
            byte[] b = new byte[4];
            for (int i = 0; i < 4; i++)
            {
                b[3 - i] = (byte)(l >> 8 * i & 255);
            }
            return new IPAddress(b);
        }

        /// <summary>
        /// 生成4位数字随机数
        /// </summary>
        /// <returns></returns>
        public static string GetRandomInt()
        {
            Random random = new Random();
            return (random.Next(1000, 9999).ToString());
        }

        /// <summary>
        /// MD5函数
        /// 返回32位大写结果.
        /// </summary>
        /// <param name="str">原始字符串</param>
        /// <returns>MD5结果</returns>
        public static string MD5(string str)
        {
            byte[] b = Encoding.UTF8.GetBytes(str);
            b = new MD5CryptoServiceProvider().ComputeHash(b);
            string ret = "";
            for (int i = 0; i < b.Length; i++)
                ret += b[i].ToString("x").PadLeft(2, '0');

            return ret.ToUpper();
        }


        /// <summary>
        /// 检测是否符合email格式
        /// </summary>
        /// <param name="strEmail">要判断的email字符串</param>
        /// <returns>判断结果</returns>
        public static bool IsValidEmail(string strEmail)
        {
            return Regex.IsMatch(strEmail, @"^[\w\.]+([-]\w+)*@[A-Za-z0-9-_]+[\.][A-Za-z0-9-_]");
        }

        /// <summary>
        /// 是否为ip
        /// </summary>
        /// <param name="ip"></param>
        /// <returns></returns>
        public static bool IsIP(string ip)
        {
            return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
        }

        /// <summary>
        /// 获得当前页面客户端的IP
        /// </summary>
        /// <returns>当前页面客户端的IP</returns>
        public static string GetRealIP()
        {
            string result = HttpContext.Current.Request.Headers["Cdn-Src-Ip"];//网宿CDN 获取用户IP 

            if (string.IsNullOrEmpty(result))
            {
                result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
            }
            if (string.IsNullOrEmpty(result))
            { result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; }

            if (string.IsNullOrEmpty(result))
            { result = HttpContext.Current.Request.UserHostAddress; }

            if (string.IsNullOrEmpty(result) || !IsIP(result))
            { return "127.0.0.1"; }

            return result;
        }

        /// <summary>
        /// 写cookie值
        /// </summary>
        /// <param name="strName">名称</param>
        /// <param name="strValue">值</param>
        /// <param name="strValue">过期时间(分钟)</param>
        public static void WriteCookie(string strName, string strValue, int expires = 480)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[strName];
            if (cookie == null)
            {
                cookie = new HttpCookie(strName);
            }
            cookie.Value = HttpContext.Current.Server.UrlEncode(strValue);
            cookie.Expires = DateTime.Now.AddMinutes(expires);
            HttpContext.Current.Response.AppendCookie(cookie);
        }

        /// <summary>
        /// 写Cookie值
        /// </summary>
        /// <param name="strName">名称</param>
        /// <param name="key">键</param>
        /// <param name="strValue">值</param>
        /// <param name="expires">过期时间</param>
        public static void WriteCookie(string strName, string key, string strValue, int expires = 480)
        {
            HttpCookie cookie = HttpContext.Current.Request.Cookies[strName];
            if (cookie == null)
            {
                cookie = new HttpCookie(strName);
            }
            cookie[key] = HttpContext.Current.Server.UrlEncode(strValue);
            cookie.Expires = DateTime.Now.AddMinutes(expires);
            HttpContext.Current.Response.AppendCookie(cookie);
        }
        /// <summary>
        /// 读cookie值
        /// </summary>
        /// <param name="strName">名称</param>
        /// <returns>cookie值</returns>
        public static string GetCookie(string strName)
        {
            if (HttpContext.Current.Request.Cookies != null && HttpContext.Current.Request.Cookies[strName] != null)
                return HttpContext.Current.Server.UrlDecode(HttpContext.Current.Request.Cookies[strName].Value.ToString());

            return "";
        }

        /// <summary>
        /// 读cookie值
        /// </summary>
        /// <param name="strName">名称</param>
        /// <returns>cookie值</returns>
        public static string GetCookie(string strName, string key)
        {
            if (HttpContext.Current.Request.Cookies != null && HttpContext.Current.Request.Cookies[strName] != null && HttpContext.Current.Request.Cookies[strName][key] != null)
                return HttpContext.Current.Server.UrlDecode(HttpContext.Current.Request.Cookies[strName][key].ToString());

            return "";
        }

        /// <summary>
        /// 另外一个清理所有Cookie的方法 
        /// </summary>
        public static void FlushAllCookie()
        {
            for (int i = 0; i < HttpContext.Current.Request.Cookies.Count; i++)
            {
                HttpContext.Current.Response.Cookies[HttpContext.Current.Request.Cookies.Keys[i]].Expires = DateTime.Now.AddDays(-600);
                HttpContext.Current.Response.Cookies[HttpContext.Current.Request.Cookies.Keys[i]].Values.Clear();
            }
        }

        /// <summary>
        /// 移除Cookies
        /// </summary>
        /// <param name="cookiesName"></param>
        public static void RemoveCookies(string cookiesName)
        {
            if (string.IsNullOrEmpty(cookiesName))
                return;
            HttpCookie cookies = HttpContext.Current.Request.Cookies[cookiesName];
            if (null != cookies)
            {
                HttpContext.Current.Response.Cookies[cookiesName].Expires = DateTime.Now.AddDays(-600);
                HttpContext.Current.Response.Cookies[cookiesName].Values.Clear();
            }
        }

        /// <summary>
        /// 将全角数字转换为数字
        /// </summary>
        /// <param name="SBCCase"></param>
        /// <returns></returns>
        public static string SBCCaseToNumberic(string SBCCase)
        {
            char[] c = SBCCase.ToCharArray();
            for (int i = 0; i < c.Length; i++)
            {
                byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
                if (b.Length == 2)
                {
                    if (b[1] == 255)
                    {
                        b[0] = (byte)(b[0] + 32);
                        b[1] = 0;
                        c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
                    }
                }
            }
            return new string(c);
        }
        /// <summary>
        /// 移除转义字符 如&nbsp;
        /// </summary>
        /// <param name="content"></param>
        /// <returns></returns>
        public static string RemoveEscapeCharacter(string content)
        {
            if (string.IsNullOrEmpty(content))
                return "";
            return Regex.Replace(content, @"&[a-zA-Z]+?;", "", RegexOptions.IgnoreCase);
        }
        /// <summary>
        /// 移除Html标记
        /// </summary>
        /// <param name="content"></param>
        /// <returns></returns>
        public static string RemoveHtml(string content)
        {
            if (string.IsNullOrEmpty(content))
                return "";
            return Regex.Replace(content, @"<[^>]*>", "", RegexOptions.IgnoreCase);
        }
        /// <summary>
        /// 移除空白 换行 TAB 中文空白
        /// </summary>
        /// <param name="content"></param>
        /// <returns></returns>
        public static string RemoveSpacing(string content)
        {
            if (string.IsNullOrEmpty(content))
                return "";
            return Regex.Replace(content, @"\s", "", RegexOptions.IgnoreCase);
        }

        /// <summary>
        /// 检测是否有Sql危险字符
        /// </summary>
        /// <param name="str">要判断字符串</param>
        /// <returns>判断结果</returns>
        public static bool IsSafeSqlString(string str)
        {
            return Regex.IsMatch(str, @"[-|;|,|\/|\(|\)|\[|\]|\}|\{|%|@|\*|!|\']");
        }

        /// <summary>
        /// 检测字符号是否只包括数字、字母和中文
        /// </summary>
        /// <param name="str">要判断字符串</param>
        /// <returns>判断结果</returns>
        public static bool IsSafeUserInfoString(string str)
        {
            return Regex.IsMatch(str, "[\\s\\p{P}\n\r=<>$>+￥^]");
        }

        /// <summary>
        /// 判断是否为base64字符串
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsBase64String(string str)
        {
            //A-Z, a-z, 0-9, +, /, =
            return Regex.IsMatch(str, @"[A-Za-z0-9\+\/\=]");
        }

        /// <summary>
        /// 判断对象是否为Int32类型的数字
        /// </summary>
        /// <param name="Expression"></param>
        /// <returns></returns>
        public static bool IsNumeric(object Expression)
        {
            return Validator.IsNumeric(Expression);
        }

        /// <summary>
        /// 从HTML中获取文本,保留br,p,img
        /// </summary>
        /// <param name="HTML"></param>
        /// <returns></returns>
        public static string GetTextFromHTML(string HTML)
        {
            System.Text.RegularExpressions.Regex regEx = new System.Text.RegularExpressions.Regex(@"</?(?!br|/?p|img)[^>]*>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

            return regEx.Replace(HTML, "");
        }
        /// <summary>
        /// 从HTML中获取文本,保留tr,td,strong,br,span,p
        /// </summary>
        /// <param name="HTML"></param>
        /// <returns></returns>
        public static string GetValueFromHTML(string HTML)
        {
            System.Text.RegularExpressions.Regex regEx = new System.Text.RegularExpressions.Regex(@"<(table|/table|tbody|/tbody)>", System.Text.RegularExpressions.RegexOptions.IgnoreCase);

            return regEx.Replace(HTML, "");
        }

        public static bool IsDouble(object Expression)
        {
            return Validator.IsDouble(Expression);
        }

        /// <summary>
        /// object型转换为bool型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的bool类型结果</returns>
        public static bool ObjectToBool(object expression, bool defValue)
        {
            return TypeConverter.ObjectToBool(expression, defValue);
        }

        /// <summary>
        /// string型转换为bool型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的bool类型结果</returns>
        public static bool StrToBool(string expression, bool defValue)
        {
            return TypeConverter.StrToBool(expression, defValue);
        }

        /// <summary>
        /// 将对象转换为Int32类型
        /// </summary>
        /// <param name="expression">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static int StrToInt(object expression, int defValue)
        {
            return TypeConverter.ObjectToInt(expression, defValue);
        }

        /// <summary>
        /// 将字符串转换为Int32类型
        /// </summary>
        /// <param name="expression">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static int StrToInt(string expression, int defValue)
        {
            return TypeConverter.StrToInt(expression, defValue);
        }


        /// <summary>
        /// 将字符串转换为DateTime类型
        /// </summary>
        /// <param name="expression">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的DateTime类型结果</returns>
        public static DateTime StrToDateTime(string expression, DateTime defValue)
        {
            return TypeConverter.StrToDateTime(expression, defValue);
        }

        /// <summary>
        /// Object型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static float StrToFloat(object strValue, float defValue)
        {
            return TypeConverter.StrToFloat(strValue, defValue);
        }

        /// <summary>
        /// string型转换为float型
        /// </summary>
        /// <param name="strValue">要转换的字符串</param>
        /// <param name="defValue">缺省值</param>
        /// <returns>转换后的int类型结果</returns>
        public static float StrToFloat(string strValue, float defValue)
        {
            return TypeConverter.StrToFloat(strValue, defValue);
        }

        /// <summary>
        /// 判断给定的字符串数组(strNumber)中的数据是不是都为数值型
        /// </summary>
        /// <param name="strNumber">要确认的字符串数组</param>
        /// <returns>是则返加true 不是则返回 false</returns>
        public static bool IsNumericArray(string[] strNumber)
        {
            return Validator.IsNumericArray(strNumber);
        }
        /// <summary>
        /// 得到距离开奖的时间差
        /// </summary>
        /// <param name="nowtime">现在时间</param>
        /// <param name="kjtime">开奖时间</param>
        /// <param name="days">过期时间 增加的天数</param>
        /// <returns>时间差</returns>
        public static TimeSpan KjTimeDiff(DateTime nowtime, DateTime kjtime)
        {
            TimeSpan ts = new TimeSpan();
            if (kjtime > nowtime)
            {
                TimeSpan ts1 = new TimeSpan(nowtime.Ticks);
                TimeSpan ts2 = new TimeSpan(kjtime.Ticks);
                ts = ts1.Subtract(ts2).Duration();

            }
            else
            {
                TimeSpan ts1 = new TimeSpan(nowtime.Ticks);
                TimeSpan ts2 = new TimeSpan(nowtime.Ticks);
                ts = ts1.Subtract(ts2).Duration();

            }
            return ts;
        }
        public static string GetLoadTitle(string title)
        {
            if (title.Length > 20)
            {
                title = title.Substring(0, 17).PadRight(20, '.');
            }
            return title;
        }


        /// <summary>
        /// 取页面源码
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static string GetPagehtml(string url)
        {
            try
            {
                WebRequest request = WebRequest.Create(url);
                request.Timeout = 20000;//20秒超时
                WebResponse response = request.GetResponse();

                Stream resStream = response.GetResponseStream();
                StreamReader sr = new StreamReader(resStream);
                return sr.ReadToEnd();
            }
            catch { return ""; }
        }
    }
}