// ReSharper disable UnusedMember.Global
// ReSharper disable MemberCanBePrivate.Global

#pragma warning disable CA1720
using System.Security.Cryptography;
using System.Text.Json;
using System.Web;
using NSExt.Constant;

namespace NSExt.Extensions;

/// <summary>
///     StringExtensions
/// </summary>
#pragma warning disable CodeLinesAnalyzer
public static class StringExtensions
{
    /// <summary>
    ///     aes加密
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="key">密钥</param>
    public static string Aes(this string me, string key)
    {
        using var aes = System.Security.Cryptography.Aes.Create();
        aes.Padding = PaddingMode.PKCS7;
        aes.Mode    = CipherMode.ECB;
        aes.Key     = key.Hex();
        using var encryptor = aes.CreateEncryptor();
        var       bytes     = me.Hex();
        var       decrypted = encryptor.TransformFinalBlock(bytes, 0, bytes.Length);
        return decrypted.Base64();
    }

    /// <summary>
    ///     aes解密
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="key">密钥</param>
    public static string AesDe(this string me, string key)
    {
        using var aes = System.Security.Cryptography.Aes.Create();
        aes.Padding = PaddingMode.PKCS7;
        aes.Mode    = CipherMode.ECB;
        aes.Key     = key.Hex();
        using var encryptor = aes.CreateDecryptor();
        var       bytes     = me.Base64De();
        var       decrypted = encryptor.TransformFinalBlock(bytes, 0, bytes.Length);
        return decrypted.HexDe();
    }

    /// <summary>
    ///     base64编码
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="e">字符串的编码方式</param>
    /// <returns>编码后的base64字符串</returns>
    public static string Base64(this string me, Encoding e)
    {
        return e.GetBytes(me).Base64();
    }

    /// <summary>
    ///     base64解码
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>解码后的原始字节数组</returns>
    public static byte[] Base64De(this string me)
    {
        return Convert.FromBase64String(me);
    }

    /// <summary>
    ///     base64解码
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="e">字符串的编码方式</param>
    /// <returns>解码后的原始字符串</returns>
    public static string Base64De(this string me, Encoding e)
    {
        return e.GetString(me.Base64De());
    }

    /// <summary>
    ///     将易于web传输的base64web字符串转换为原生base64
    /// </summary>
    /// <returns>原生base64</returns>
    public static string Base64Sys(this string me)
    {
        return me.Replace("-", "+").Replace("_", "/").Replace(".", "=");
    }

    /// <summary>
    ///     将原生base64字符串转换成易于web传输的字符串
    /// </summary>
    /// <returns>易于web传输的字符串</returns>
    public static string Base64Web(this string me)
    {
        return me.Replace("+", "-").Replace("/", "_").Replace("=", ".");
    }

    /// <summary>
    ///     将字符串转换成日期对象
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>转换后的日期对象</returns>
    public static DateTime DateTime(this string me)
    {
        return System.DateTime.Parse(me, CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     将字符串转换成日期对象
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="format">日期格式</param>
    /// <returns>转换后的日期对象</returns>
    public static DateTime DateTimeExact(this string me, string format)
    {
        return System.DateTime.ParseExact(me, format, CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     将字符串转换成日期对象
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="format">日期格式</param>
    /// <param name="def">转换失败时返回的日期对象</param>
    /// <returns>转换后的日期对象</returns>
    public static DateTime DateTimeExactTry(this string me, string format, DateTime def)
    {
        return !System.DateTime.TryParseExact(me, format, CultureInfo.CurrentCulture, DateTimeStyles.None, out var ret)
            ? def
            : ret;
    }

    /// <summary>
    ///     将字符串转换成日期对象
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="def">转换失败时返回的日期对象</param>
    /// <returns>转换后的日期对象</returns>
    public static DateTime DateTimeTry(this string me, DateTime def)
    {
        return !System.DateTime.TryParse(me, CultureInfo.InvariantCulture, DateTimeStyles.None, out var ret)
            ? def
            : ret;
    }

    /// <summary>
    ///     string to decimal
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>decimal</returns>
    public static decimal Dec(this string me)
    {
        return decimal.Parse(me, CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     尝试将字符串转为decimal
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="def">转换失败后返回的默认值</param>
    /// <returns>转换后的decimal</returns>
    public static decimal DecTry(this string me, decimal def)
    {
        return !decimal.TryParse(me, out var ret) ? def : ret;
    }

    /// <summary>
    ///     string to double
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>Int32</returns>
    public static double Double(this string me)
    {
        return double.Parse(me, CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     将字符串转换成枚举对象
    /// </summary>
    public static T Enum<T>(this string name)
        where T : Enum
    {
        return (T)System.Enum.Parse(typeof(T), name, true);
    }

    /// <summary>
    ///     将字符串转换成枚举对象
    /// </summary>
    public static T EnumTry<T>(this string name, T def)
        where T : Enum
    {
        return !System.Enum.TryParse(typeof(T), name, out var ret) ? def : (T)ret;
    }

    /// <summary>
    ///     string to float
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>Int32</returns>
    public static float Float(this string me)
    {
        return float.Parse(me, CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     将字符串转为guid
    /// </summary>
    /// <param name="me">me</param>
    public static Guid Guid(this string me)
    {
        return System.Guid.Parse(me);
    }

    /// <summary>
    ///     将字符串转换成guid
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="def">转换失败的返回值</param>
    public static Guid Guid(this string me, Guid def)
    {
        return System.Guid.TryParse(me, out var ret) ? ret : def;
    }

    /// <summary>
    ///     将字符串转换成字节数组形式
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="e">字符串使用的编码</param>
    /// <returns>字节数组</returns>
    public static byte[] Hex(this string me, Encoding e)
    {
        return e.GetBytes(me);
    }

    /// <summary>
    ///     将字符串转换成字节数组形式
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>字节数组</returns>
    public static byte[] Hex(this string me)
    {
        return me.Hex(Encoding.UTF8);
    }

    /// <summary>
    ///     对一个字符串进行sha1 hash运算
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="secret">密钥</param>
    /// <param name="e">使用的编码</param>
    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
    public static string HmacSha1(this string me, string secret, Encoding e)
    {
        #pragma warning disable CA5350
        using var hmacSha1 = new HMACSHA1(e.GetBytes(secret));
        #pragma warning restore CA5350

        return BitConverter.ToString(hmacSha1.ComputeHash(e.GetBytes(me)))
                           .Replace("-", string.Empty)
                           .ToLower(CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     html编码
    /// </summary>
    public static string Html(this string me)
    {
        return HttpUtility.HtmlEncode(me);
    }

    /// <summary>
    ///     解码html编码
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>解码后的原始字符串</returns>
    public static string HtmlDe(this string me)
    {
        return HttpUtility.HtmlDecode(me);
    }

    /// <summary>
    ///     string to Int32
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>Int32</returns>
    public static int Int32(this string me)
    {
        return int.Parse(me, CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     尝试将字符串转为int32
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="def">转换失败后返回的默认值</param>
    /// <returns>转换后的int32</returns>
    public static int Int32Try(this string me, int def)
    {
        return !int.TryParse(me, out var ret) ? def : ret;
    }

    /// <summary>
    ///     string to Int64
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>Int64</returns>
    public static long Int64(this string me)
    {
        return long.Parse(me, CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     尝试将字符串转为int64
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="def">转换失败后返回的默认值</param>
    /// <returns>转换后的int64</returns>
    public static long Int64Try(this string me, long def)
    {
        return !long.TryParse(me, out var ret) ? def : ret;
    }

    /// <summary>
    ///     ipv4格式转int32格式
    /// </summary>
    public static int IpV4ToInt32(this string me)
    {
        return BitConverter.ToInt32(me.Split('.').Select(byte.Parse).Reverse().ToArray(), 0);
    }

    /// <summary>
    ///     是否base64字符串
    /// </summary>
    /// <param name="me">me</param>
    public static bool IsBase64String(this string me)
    {
        // 一个合法的Base64，有着以下特征：
        // 字符串的长度为4的整数倍。
        // 字符串的符号取值只能在A -Z, a -z, 0 -9, +, /, =共计65个字符中，且 = 如果出现就必须在结尾出现。
        if (!me.All(x => x.IsBase64Character())) {
            return false;
        }

        if (me.Length % 4 != 0) {
            return false;
        }

        var firstEqualSignPos = me.IndexOf('=');
        if (firstEqualSignPos < 0) {
            return true;
        }

        var lastEqualSignPos = me.LastIndexOf('=');
        return lastEqualSignPos == me.Length - 1 && me[firstEqualSignPos..lastEqualSignPos].All(x => x == '=');
    }

    /// <summary>
    ///     中文姓名打马赛克
    /// </summary>
    public static string MaskChineseName(this string me)
    {
        return me.Length == 2 ? "*" + me[1..] : me[..1] + "*" + me[^1..];
    }

    /// <summary>
    ///     对一个手机号进行掩码处理
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>掩码后的手机号</returns>
    public static string MaskMobile(this string me)
    {
        return Regexes.RegexMobile.Replace(me, "$1****$2");
    }

    /// <summary>
    ///     对一个字符串进行md5hash运算
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="e">字符串使用的编码</param>
    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
    public static string Md5(this string me, Encoding e)
    {
        #pragma warning disable CA5351
        return BitConverter.ToString(MD5.HashData(e.GetBytes(me)))
                           #pragma warning restore CA5351
                           .Replace("-", string.Empty)
                           .ToLower(CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     判断字符串是否为null或不存在子元素（如果为集合对象）；如果为空，返回指定的默认值，否则返回字符串本身
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="defVal">指定的默认值</param>
    /// <returns>如果为空，返回指定的默认值，否则返回字符串本身</returns>
    public static string NullOrEmpty(this string me, string defVal)
    {
        return me.AsEnumerable().NullOrEmpty() ? defVal : me;
    }

    /// <summary>
    ///     null或空白字符
    /// </summary>
    public static bool NullOrWhiteSpace(this string me)
    {
        return string.IsNullOrWhiteSpace(me);
    }

    /// <summary>
    ///     反序列化一个文件获得指定类型的数据对象
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="options">序列化选项</param>
    /// <returns>反序列化后生成的对象</returns>
    public static T Object<T>(this string me, JsonSerializerOptions options = null)
    {
        return JsonSerializer.Deserialize<T>(me, options);
    }

    /// <summary>
    ///     反序列化一个文件获得指定类型的数据对象
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="type">实际类型</param>
    /// <param name="options">序列化选项</param>
    /// <returns>反序列化后生成的对象</returns>
    public static object Object(this string me, Type type, JsonSerializerOptions options = null)
    {
        return JsonSerializer.Deserialize(me, type, options);
    }

    /// <summary>
    ///     生成密码
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>密文</returns>
    public static string Pwd(this string me)
    {
        return me.Md5Hmac(me.Md5(Encoding.UTF8), Encoding.UTF8);
    }

    /// <summary>
    ///     移除字符串中的html标签
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>处理之后的字符串</returns>
    public static string RemoveHtmlTag(this string me)
    {
        return Regexes.RegexHtmlTag.Replace(me, string.Empty);
    }

    /// <summary>
    ///     删除换行符
    /// </summary>
    public static string RemoveWrapped(this string me)
    {
        return me.Replace("\r", string.Empty).Replace("\n", string.Empty);
    }

    /// <summary>
    ///     对一个字符串进行sha1 hash运算
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="e">字符串使用的编码</param>
    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
    public static string Sha1(this string me, Encoding e)
    {
        #pragma warning disable CA5350
        return BitConverter.ToString(SHA1.HashData(e.GetBytes(me)))
                           #pragma warning restore CA5350
                           .Replace("-", string.Empty)
                           .ToLower(CultureInfo.CurrentCulture);
    }

    /// <summary>
    ///     蛇形命名
    /// </summary>
    public static string SnakeCase(this string me)
    {
        return Regexes.RegexUpLetter.Replace(me, "-$1").ToLower(CultureInfo.InvariantCulture).TrimStart('-');
    }

    /// <summary>
    ///     截取指定长度的字符串，代替substring
    /// </summary>
    public static string Sub(this string me, int startIndex, int length)
    {
        if (startIndex + length > me.Length) {
            length = me.Length - startIndex;
        }

        return me.Substring(startIndex, length);
    }

    /// <summary>
    ///     纯文本字符串转html
    /// </summary>
    public static string Text2Html(this string me)
    {
        return $"<pre>{me}</pre>";
    }

    /// <summary>
    ///     首字母小写
    /// </summary>
    public static string ToLowerCamelCase(this string me)
    {
        return string.IsNullOrWhiteSpace(me)
            ? me
            : string.Concat( //
                me[0].ToString(CultureInfo.InvariantCulture).ToLowerInvariant(), me.AsSpan(1));
    }

    /// <summary>
    ///     首字母大写
    /// </summary>
    public static string ToUpperCamelCase(this string me)
    {
        return string.IsNullOrWhiteSpace(me) ? me : string.Concat(me[0].ToString().ToUpperInvariant(), me.AsSpan(1));
    }

    /// <summary>
    ///     将连续多个空格替换成一个空格
    /// </summary>
    public static string TrimSpaces(this string me)
    {
        var ret = me.Replace("  ", " ");

        // ReSharper disable once TailRecursiveCall
        return ret == me ? ret : ret.TrimSpaces();
    }

    /// <summary>
    ///     将\ux0000 、 %u0000 、 &amp;#x0000;  编码转换成可读字符串
    /// </summary>
    public static string UnicodeDe(this string me)
    {
        const string replacement = "&#x$1;";
        if (me.Contains(@"\u")) {
            return Regexes.RegexBacksLantUnicode.Replace(me, replacement).HtmlDe();
        }

        // ReSharper disable once ConvertIfStatementToReturnStatement
        #pragma warning disable IDE0046
        if (me.Contains("%u")) {
            #pragma warning restore IDE0046
            return Regexes.RegexPercentUnicode.Replace(me, replacement).HtmlDe();
        }

        return me.HtmlDe();
    }

    /// <summary>
    ///     url编码
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>url编码后的字符串</returns>
    public static string Url(this string me)
    {
        return Uri.EscapeDataString(me);
    }

    /// <summary>
    ///     解码url编码
    /// </summary>
    /// <param name="me">me</param>
    /// <returns>解码后的原始字符串</returns>
    public static string UrlDe(this string me)
    {
        return Uri.UnescapeDataString(me);
    }

    /// <summary>
    ///     MD5 hmac编码
    /// </summary>
    /// <param name="me">me</param>
    /// <param name="key">密钥</param>
    /// <param name="e">字符串使用的编码</param>
    /// <returns>hash摘要的16进制文本形式（无连字符小写）</returns>
    private static string Md5Hmac(this string me, string key, Encoding e)
    {
        #pragma warning disable CA5351
        using var md5Hmac = new HMACMD5(e.GetBytes(key));
        #pragma warning restore CA5351
        return BitConverter.ToString(md5Hmac.ComputeHash(e.GetBytes(me)))
                           .Replace("-", string.Empty)
                           .ToLower(CultureInfo.CurrentCulture);
    }
}
#pragma warning restore CodeLinesAnalyzer