namespace YLErp.Helpers
{
    public static class StringHelper
    {
        public static bool IsNullOrWhiteSpace(this string str)
        {
            return string.IsNullOrWhiteSpace(str);
        }

        public static string GetFixedStr(string desc1, string desc2, int total1 = 40, int total2 = 20)
        {
            int remainLength = total1 - System.Text.Encoding.Default.GetBytes(desc1).Length;
            int remainLength2 = total2 - System.Text.Encoding.Default.GetBytes(desc2).Length;
            return desc1 + "".PadRight(remainLength, " "[0]) + desc2 + "".PadRight(remainLength2, " "[0]);
        }

        /// <summary>
        /// 根据targetStr长度设置
        /// </summary>
        /// <param name="desc1"></param> 
        /// <returns></returns>
        public static string GetFixedStr2(string desc1, string targetStr)
        {
            int targetLength = System.Text.Encoding.Default.GetBytes(targetStr).Length;
            int useLength = System.Text.Encoding.Default.GetBytes((desc1 + "")).Length;
            int remainLength = targetLength - useLength;
            if (remainLength < 0)
            {
                remainLength = 0;
            }

            return desc1 + "".PadRight(remainLength, " "[0]);
        }

        /// <summary>
        /// 以精确模式转换浮点数为特定小数精度的字符串，使用四舍五入模式,
        /// 但111111111111.2249999999999999需要转为111111111111.22而不是111111111111.23
        /// </summary>
        public static string ToFixedPrecise(double? value, int decimalSize = 2)
        {
            if (value == null)
            {
                return string.Empty;
            }
            if (decimalSize < 1)
            {
                return Math.Floor(value.Value).ToString("0");
            }
            var decExp = Math.Pow(10, decimalSize + 1);
            return (Math.Floor(value.Value * decExp) / decExp).ToString("f" + decimalSize);
        }

        /// <summary>
        /// 将逗号分隔的字符串转换为字符串数组，并去除空白项与重复项。
        /// </summary>
        /// <param name="commaValues">逗号分隔的字符串。</param>
        /// <returns>去除空白项与重复项后的字符串数组。</returns>
        public static string[] ConvertCommaValuesToStringArray(string commaValues)
        {
            if (string.IsNullOrWhiteSpace(commaValues))
            {
                return new string[0];
            }

            return commaValues.Split(',')
                .Select(o => o?.Trim())
                .Where(o => !string.IsNullOrWhiteSpace(o))
                .Distinct()
                .ToArray();
        }
    }
}