using System;
using System.Collections.Generic;
using System.Web;

using System.Text.RegularExpressions;
using System.Web.Security;
using System.Web.Caching;
using System.Data;
using System.Text;
using System.Web.UI;

/// <summary>
/// 网站一般通用方法
/// </summary>
public abstract class Common {
  private static HttpResponse Response = HttpContext.Current.Response;
  private static HttpRequest Request = HttpContext.Current.Request;
  private static Cache Cache = HttpContext.Current.Cache;

  //来访者基本情况提问类型数组
  public static readonly string[] MemberQuestionType = { "单项选择", "多项选择", "单行输入", "多行输入", "下拉列表" };

  public Common() {
    //
    //TODO: 在此处添加构造函数逻辑
    //
  }

  public static void Alert(string msg) {
    HttpContext.Current.Response.Write("<script>alert(\"" + msg + "\");history.back();</script>");
    HttpContext.Current.Response.End();
  }

  /// <summary>
  /// 是否为非负整数
  /// </summary>
  public static bool IsInteger(string number) {
    if (string.IsNullOrEmpty(number)) { return false; }
    else {
      Regex r = new Regex(@"^\d+$");
      return r.IsMatch(number);
    }
  }

  /// <summary>
  /// 是否为合法的18位身份证号码
  /// </summary>
  public static bool IsIDCard(string CardId) {
    if (string.IsNullOrEmpty(CardId)) { return false; }
    else if (CardId.Length < 18) { return false; }
    else {
      long n = 0;
      //数字验证
      if (long.TryParse(CardId.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(CardId.Replace('x', '0').Replace('X', '0'), out n) == false) { return false; }
      //省份验证
      string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
      if (address.IndexOf(CardId.Remove(2)) == -1) { return false; }
      //生日验证
      string Mybirth = CardId.Substring(6, 8).Insert(6, "-").Insert(4, "-");
      DateTime Mytime = new DateTime();
      if (DateTime.TryParse(Mybirth, out Mytime) == false) { return false; }
      //校验码验证
      string[] MyVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
      string[] wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
      char[] ai = CardId.Remove(17).ToCharArray();
      int sum = 0;
      for (int i = 0; i < 17; i++) { sum += int.Parse(wi[i]) * int.Parse(ai[i].ToString()); }
      int y = -1;
      Math.DivRem(sum, 11, out y);
      if (MyVarifyCode[y] != CardId.Substring(17, 1).ToLower()) { return false; }
      return true;
    }
  }

  /// <summary>
  /// 判断是否为合法的手机号码
  /// </summary>
  public static bool IsMobile(string s) {
    if (string.IsNullOrEmpty(s)) { return false; }
    else {
      Regex r = new Regex(@"^\+?(86)?1(3[0-9]|47|5[0-9]|7[0-9]|8[0-9])\d{8}$");
      return r.IsMatch(s);
    }
  }

  /// <summary>
  /// 判断是否为合法的MD5加密字串
  /// </summary>
  public static bool IsMD5(string s) {
    if (string.IsNullOrEmpty(s)) { return false; }
    else {
      Regex r = new Regex(@"^[a-fA-F0-9]{32}$");
      return r.IsMatch(s);
    }
  }

  /// <summary>
  /// 判断是否为合法的金额数字
  /// </summary>
  public static bool IsMoney(string s) {
    if (string.IsNullOrEmpty(s)) { return false; }
    else {
      Regex r = new Regex(@"^(0(?:[.](?:[1-9]\d?|0[1-9]))|[1-9]\d*(?:[.]\d{1,2}|$))$");
      return r.IsMatch(s);
    }
  }

  /// <summary>
  /// 字符串转换为日期类型数据
  /// </summary>
  public static DateTime CDate(string date) {
    DateTime d;
    DateTime.TryParse(date, out d);
    if (d == DateTime.MinValue) { d = DateTime.Today; }
    return d;
  }

  /// <summary>
  /// 判断一个对象是否能够被转换为合法的日期格式，返回真或假
  /// </summary>
  public static bool IsDate(object dt) {
    if (dt == null) { return false; }
    else if (dt is DateTime) { return true; }
    else if (dt is string) {
      DateTime d;
      return DateTime.TryParse((string)dt, out d);
    }
    else { return false; }
  }

  //截取指定长度字符串
  public static string CutString(string str, int len) {
    if (str == null || str.Length == 0 || len <= 0) { return string.Empty; }
    int l = str.Length;

    int clen = 0;
    while (clen < len && clen < l) {
      //每遇到一个中文，则将目标长度减一。
      if ((int)str[clen] > 128) { len--; }
      clen++;
    }

    if (clen < l) { return str.Substring(0, clen) + "..."; }
    else { return str; }
  }

  //页面跳转
  public static void Redirect(string url) {
    HttpContext.Current.Response.Redirect(url, true);
  }

  //写入缓存
  public static void InsertCache(string key, object value) {
    Cache.Insert(key, value);
  }

  //读出缓存
  public static object GetCache(string key) {
    return Cache[key];
  }

  //清除缓存
  public static void RemoveCache(string key) {
    Cache.Remove(key);
  }

  //输出调试信息
  public static void Debug(string msg) {
    HttpContext.Current.Response.Write(msg);
    HttpContext.Current.Response.End();
  }

  //根据传入数字数组，计算最大值、最小值、平均分和标准差
  public static float[] GetMaxandMinandMandSD(float[] Number) {
    float[] Result = { 0, 0, 0, 0 };
    Result[0] = Number[0];
    Result[1] = Number[0];
    float Sum = 0;
    int Count = Number.Length;
    float SumSqdDevs = 0;
    //最大值、最小值、和
    for (int i = 0; i < Count; i++) {
      if (Number[i] > Result[0]) { Result[0] = Number[i]; }
      if (Number[i] < Result[0]) { Result[1] = Number[i]; }
      Sum += Number[i];
    }
    //平均分
    Result[2] = Sum / Count;
    //方差
    for (int i = 0; i < Count; i++) { SumSqdDevs += (float)Math.Pow((Number[i] - Result[2]), 2); }
    //标准差
    Result[3] = (float)Math.Sqrt(SumSqdDevs / Count);
    return Result;
  }

  /// <summary>
  /// 判断字符串是否既不是Null也不是空值
  /// </summary>
  public static bool IsNotNullAndEmpty(string s) {
    return !(s == null || s == string.Empty);
  }

  /// <summary>
  /// MD5加密（32位，小写）
  /// </summary>
  public static string MD5(string s) {
    return FormsAuthentication.HashPasswordForStoringInConfigFile(s, "MD5").ToLower();
  }

  /// <summary>
  /// SHA1加密
  /// </summary>
  public static string SHA1(string s) {
    return FormsAuthentication.HashPasswordForStoringInConfigFile(s, "SHA1").ToLower();
  }

  //检查角色
  public static void CheckRole(string role) {
    if (!HttpContext.Current.User.IsInRole(role)) { HttpContext.Current.Response.Redirect("Message.aspx?Msg=0对不起，您没有该项操作的权限！"); }
  }

  /// <summary>
  /// 替换字符串用于json时其中包含的转义字符
  /// </summary>
  public static string JsonEncode(object json) {
    return json.ToString().Replace("\\", "\\\\").Replace("\"", "\\\"").Replace("\r", "\\r").Replace("\n", "\\n").Replace("\t", "\\t");
  }

  /// <summary>
  /// 随机数字，传入数字位数
  /// </summary>
  public static string RndNumber(int l) {
    StringBuilder sb = new StringBuilder(l);
    Random rd = new Random();
    for (int i = 0; i < l; i++) { sb.Append(rd.Next(10)); }
    return sb.ToString();
  }

  /// <summary>
  /// 从右边截取字符串
  /// </summary>
  public static string Right(string str, int n) {
    return str.Substring(n > str.Length ? 0 : str.Length - n);
  }
}