namespace RoBot.Core
{
    public class Utils
    {
        /// <summary>
        /// 格式化数字为中文单位
        /// </summary>
        /// <param name="number"></param>
        /// <returns></returns>
        public static string FormatNumberToChineseUnit(decimal number)
        {
            if (number >= 100000000) // 亿
            {
                decimal value = number / 100000000.0M;
                return $"{value:0.#}亿";
            }
            else if (number >= 10000) // 万
            {
                decimal value = number / 10000.0M;
                return $"{value:0.#}万";
            }
            else
            {
                return number.ToString();
            }
        }

        /// <summary>
        /// 解析中文数字
        /// </summary>
        /// <param name="chineseNumber"></param>
        /// <returns></returns>
        public static decimal ParseChineseNumber(string chineseNumber)
        {
            if (string.IsNullOrWhiteSpace(chineseNumber))return 0;

            chineseNumber = chineseNumber.Trim();

            decimal multiplier = 1;
            if (chineseNumber.Contains("亿"))
                multiplier = 100000000;
            else if (chineseNumber.Contains("万"))
                multiplier = 10000;
            var numberPart = chineseNumber.Replace("亿", "").Replace("万", "");
            if (!decimal.TryParse(numberPart, out decimal value)) return 0;

            return value * multiplier;
        }

        /// <summary>
        /// 计算手续费
        /// </summary>
        /// <param name="amount"></param>
        /// <returns></returns>
        public static decimal CalculateFee(decimal amount)
        {
            decimal rate = 0;

            if (amount < 500_0000)           // 0 ~ 499w
                rate = 0.05m;                // 5%
            else if (amount < 1000_0000)     // 500 ~ 999w
                rate = 0.10m;                // 10%
            else if (amount < 1500_0000)     // 1000 ~ 1499w
                rate = 0.15m;                // 15%
            else if (amount < 2000_0000)     // 1500 ~ 1999w
                rate = 0.20m;                // 20%
            else                             // 2000w以上
                rate = 0.30m;                // 30%

            return amount * rate;
        }
    }
}