using System.Text.RegularExpressions;

namespace EC.Util.Common;

/// <summary>
/// 验证工具类
/// </summary>
public class VerifyUtil
{
    /// <summary>
    /// 验证是否为空
    /// </summary>
    /// <param name="str"></param>
    /// <returns></returns>
    public static bool IsEmpty(string str)
    {
        return string.IsNullOrEmpty(str);
    }

    /// <summary>
    /// 验证是否为邮件
    /// </summary>
    /// <param name="emailStr"></param>
    /// <returns></returns>
    public static bool IsEmail(string emailStr)
    {
        if (string.IsNullOrEmpty(emailStr)) return false;
        string match = @"^([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+@([a-zA-Z0-9]+[_|\-|\.]?)*[a-zA-Z0-9]+\.[a-zA-Z]{2,3}$";
        Regex r = new(match, RegexOptions.Compiled | RegexOptions.IgnoreCase);
        return r.IsMatch(emailStr.Trim());
    }

    /// <summary>
    /// 验证是否为数字
    /// </summary>
    /// <param name="numberStr"></param>
    /// <returns></returns>
    public static bool IsNumber(string numberStr)
    {
        if (string.IsNullOrEmpty(numberStr)) return false;
        string match = @"^(0|[1-9][0-9]*)$";
        Regex r = new(match, RegexOptions.Compiled | RegexOptions.IgnoreCase);
        return r.IsMatch(numberStr.Trim());
    }

    /// <summary>
    /// 验证是否为浮点数
    /// </summary>
    /// <param name="decimalStr"></param>
    /// <returns></returns>
    public static bool IsDecimal(string decimalStr)
    {
        if (string.IsNullOrEmpty(decimalStr)) return false;
        string match = @"^(-?\d+)(\.\d+)?$";
        Regex r = new(match, RegexOptions.Compiled | RegexOptions.IgnoreCase);
        return r.IsMatch(decimalStr.Trim());
    }

    /// <summary>
    /// 验证是否为手机号码
    /// </summary>
    /// <param name="mobileStr"></param>
    /// <returns></returns>
    public static bool IsMobile(string mobileStr)
    {
        if (string.IsNullOrEmpty(mobileStr)) return false;
        string match = @"^[1]+[3,5,7,8]+\d{9}";
        Regex r = new(match, RegexOptions.Compiled | RegexOptions.IgnoreCase);
        return r.IsMatch(mobileStr.Trim());
    }

    /// <summary>
    /// 验证是否为电话号码
    /// </summary>
    /// <param name="telStr"></param>
    /// <returns></returns>
    public static bool IsTel(string telStr)
    {
        if (string.IsNullOrEmpty(telStr)) return false;
        string match = @"^(\+86\s{1,1})?((\d{3,4}\-)\d{7,8})$";
        Regex r = new(match, RegexOptions.Compiled | RegexOptions.IgnoreCase);
        return r.IsMatch(telStr.Trim());
    }

    /// <summary>
    /// 验证是否为Ip地址
    /// </summary>
    /// <param name="ipStr"></param>
    /// <returns></returns>
    public static bool IsIp(string ipStr)
    {
        if (string.IsNullOrEmpty(ipStr)) return false;
        string match = @"^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])$";
        Regex r = new(match);
        return r.IsMatch(ipStr.Trim());
    }

    /// <summary>
    /// 验证是否为身份证
    /// </summary>
    /// <param name="idcardStr">身份证号</param>
    /// <returns></returns>
    public static bool CheckIDCard(string idcardStr)
    {
        if (string.IsNullOrEmpty(idcardStr)) return false;
        if (idcardStr.Length == 18) return CheckIDCard18(idcardStr);
        else if (idcardStr.Length == 15) return CheckIDCard15(idcardStr);
        return false;
    }

    /// <summary>
    /// 18位身份证验证
    /// </summary>
    /// <param name="Id">身份证号</param>
    /// <returns></returns>
    private static bool CheckIDCard18(string Id)
    {
        long n = 0;
        if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)
        {
            return false;//数字验证
        }
        string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
        if (address.IndexOf(Id.Remove(2)) == -1)
        {
            return false;//省份验证
        }
        string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");
        DateTime time = new DateTime();
        if (DateTime.TryParse(birth, out time) == false)
        {
            return false;//生日验证
        }
        string[] arrVarifyCode = ("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 = Id.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 (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())
        {
            return false;//校验码验证
        }
        return true;//符合GB11643-1999标准
    }

    /// <summary>
    /// 15位身份证验证
    /// </summary>
    /// <param name="Id">身份证号</param>
    /// <returns></returns>
    private static bool CheckIDCard15(string Id)
    {
        long n = 0;
        if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14))
        {
            return false;//数字验证
        }
        string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
        if (address.IndexOf(Id.Remove(2)) == -1)
        {
            return false;//省份验证
        }
        string birth = Id.Substring(6, 6).Insert(4, "-").Insert(2, "-");
        DateTime time = new DateTime();
        if (DateTime.TryParse(birth, out time) == false)
        {
            return false;//生日验证
        }
        return true;//符合15位身份证标准
    }
}