using System.Text;

namespace Tiobon.Core.Common.Helper;

public class StringHelper
{
    /// <summary>
    /// 根据分隔符返回前n条数据
    /// </summary>
    /// <param name="content">数据内容</param>
    /// <param name="separator">分隔符</param>
    /// <param name="top">前n条</param>
    /// <param name="isDesc">是否倒序（默认false）</param>
    /// <returns></returns>
    public static List<string> GetTopDataBySeparator(string content, string separator, int top, bool isDesc = false)
    {
        if (string.IsNullOrEmpty(content))
        {
            return new List<string>() { };
        }

        if (string.IsNullOrEmpty(separator))
        {
            throw new ArgumentException("message", nameof(separator));
        }

        var dataArray = content.Split(separator).Where(d => !string.IsNullOrEmpty(d)).ToArray();
        if (isDesc)
        {
            Array.Reverse(dataArray);
        }

        if (top > 0)
        {
            dataArray = dataArray.Take(top).ToArray();
        }

        return dataArray.ToList();
    }
    /// <summary>
    /// 根据字段拼接get参数
    /// </summary>
    /// <param name="dic"></param>
    /// <returns></returns>
    public static string GetPars(Dictionary<string, object> dic)
    {

        StringBuilder sb = new StringBuilder();
        string urlPars = null;
        bool isEnter = false;
        foreach (var item in dic)
        {
            sb.Append($"{(isEnter ? "&" : "")}{item.Key}={item.Value}");
            isEnter = true;
        }
        urlPars = sb.ToString();
        return urlPars;
    }
    /// <summary>
    /// 根据字段拼接get参数
    /// </summary>
    /// <param name="dic"></param>
    /// <returns></returns>
    public static string GetPars(Dictionary<string, string> dic)
    {

        StringBuilder sb = new StringBuilder();
        string urlPars = null;
        bool isEnter = false;
        foreach (var item in dic)
        {
            sb.Append($"{(isEnter ? "&" : "")}{item.Key}={item.Value}");
            isEnter = true;
        }
        urlPars = sb.ToString();
        return urlPars;
    }
    /// <summary>
    /// 获取一个GUID
    /// </summary>
    /// <param name="format">格式-默认为N</param>
    /// <returns></returns>
    public static string GetGUID(string format="N") {
        return Guid.NewGuid().ToString(format);
    }
    /// <summary>  
    /// 根据GUID获取19位的唯一数字序列  
    /// </summary>  
    /// <returns></returns>  
    public static long GetGuidToLongID()
    {
        byte[] buffer = Guid.NewGuid().ToByteArray();
        return BitConverter.ToInt64(buffer, 0);
    }
    /// <summary>
    /// 获取字符串最后X行
    /// </summary>
    /// <param name="resourceStr"></param>
    /// <param name="length"></param>
    /// <returns></returns>
    public static string GetCusLine(string resourceStr, int length) {
        string[] arrStr = resourceStr.Split("\r\n");
        return string.Join("", (from q in arrStr select q).Skip(arrStr.Length - length + 1).Take(length).ToArray());  
    }
    #region 求系统唯一字符串
    /// <summary>
    /// 求系统唯一字符串，常用于ROW_ID值。
    /// </summary>
    /// <returns>字符串</returns>
    public static string GetSysID()
    {
        string sid = string.Empty;

        byte[] buffer = Guid.NewGuid().ToByteArray();
        sid = DateTime.Now.ToString("yyMMddHHmmss") + BitConverter.ToInt64(buffer, 0).ToString();
        return sid;
    }
    #endregion



    /// <summary>
    /// 格式化数字字符，并保留指定的小数位
    /// </summary>
    /// <param name="value">需要处理的值</param>
    /// <param name="reservedDigit">保留小数点后位数，-1时只会去除小数点后最后几位的0</param>
    /// <returns></returns>
    public static string TrimNumber(decimal value, int reservedDigit)
    {
        try
        {
            string result = string.Empty;
            if (!string.IsNullOrEmpty(Convert.ToString(value)))
            {
                //此处主要是为MVC页面中数字类型的字段作处理
                if (value != decimal.MinValue)
                {
                    Decimal tmp = Decimal.Parse(Convert.ToString(value));
                    if (reservedDigit == -1)
                    {
                        result = string.Format("{0:#0.##########}", tmp);
                    }
                    else
                    {
                        result = String.Format("{0:N" + reservedDigit.ToString() + "}", tmp);
                        result = result.Replace(",", "");
                    }
                }
            }
            return result;
        }
        catch (Exception E)
        {
            throw E;
        }
    }
}