using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Threading;

namespace Muchinfo.PC.Common.Helpers
{
    /// <summary>
    /// 格式化帮助类
    /// </summary>
    public static class FormatHelper
    {
        #region Fields

        /// <summary>
        /// 日期格式 yyyy/MM/dd
        /// </summary>
        public const string DateFormat = "yyyy/MM/dd";

        /// <summary>
        /// 日期格式 yyyyMMdd
        /// </summary>
        public const string DateFormat2 = "yyyyMMdd";

        /// <summary>
        /// 日期格式 MM/dd
        /// </summary>
        public const string DateFormat3 = "MM/dd";

        /// <summary>
        /// 日期时间格式 yyyy-MM-dd HH:mm:ss
        /// </summary>
        public const string DateTimeFormat = "yyyy-MM-dd HH:mm:ss";

        /// <summary>
        /// 日期时间格式 yyyy-MM-dd HH:mm:ss.fff
        /// </summary>
        public const string DateTimeFormat2 = "yyyy-MM-dd HH:mm:ss.fff";

        /// <summary>
        /// 日期时间格式 yyyyMMddHHmmss
        /// </summary>
        public const string DateTimeFormat3 = "yyyyMMddHHmmss";

        /// <summary>
        /// 一级分隔符 ','
        /// </summary>
        public const char Level1SplitChar = ',';

        /// <summary>
        /// 二级分隔符 '_'
        /// </summary>
        public const char Level2SplitChar = '_';

        /// <summary>
        /// 三级分隔符 ':'
        /// </summary>
        public const char Level3SplitChar = ':';

        /// <summary>
        /// 数字格式 0.? N位小数
        /// </summary>
        public const string NumberDecimalFormat = "f{0}";

        /// <summary>
        /// 数字格式 0.00 两位小数
        /// </summary>
        public const string NumberFormat = "f2";

        /// <summary>
        /// 数字格式 整数
        /// </summary>
        public const string NumberFormat2 = "f0";

        /// <summary>
        /// 数字科学计数法格式化
        /// </summary>
        public const string NumberNotationFormat = "0.000E+00";

        /// <summary>
        /// 数字百分比格式 ?%
        /// </summary>
        public const string PercentFormat = "p2";

        /// <summary>
        /// 数字百分比格式化带0两位小数
        /// </summary>
        public const string PercentFormat2 = "#0.00";

        /// <summary>
        /// 数字百分比格式 0.000%
        /// </summary>
        public const string PercentFormat3 = "p3";

        /// <summary>
        /// 时间格式 HH:mm:ss
        /// </summary>
        public const string TimeFormat = "HH:mm:ss";

        /// <summary>
        /// 时间格式 HHmm
        /// </summary>
        public const string TimeFormat2 = "HHmm";

        /// <summary>
        /// 时间格式 HH:mm
        /// </summary>
        public const string TimeFormat3 = "HH:mm";

        private static OrdinalIgnoreCaseStringEqualityComparer stringEqualityComparer = new OrdinalIgnoreCaseStringEqualityComparer();

        #endregion Fields

        #region Properties

        #region Public Static Properties

        /// <summary>
        ///获取字符串比较器
        /// </summary>
        public static OrdinalIgnoreCaseStringEqualityComparer StringEqualityComparer
        {
            get { return stringEqualityComparer; }
        }

        #endregion Public Static Properties

        #endregion Properties

        #region Methods

        #region Public Static Methods

        /// <summary>
        /// 从无格式化紧凑日期时间字符串还原回日期时间类型
        /// </summary>
        /// <param name="dateTime">日期时间</param>
        /// <returns>日期时间实例</returns>
        public static DateTime DateTimeFromString(string dateTime)
        {
            DateTime value = DateTime.MinValue;
            int year = value.Year, month = value.Month, day = value.Day, hour = 0, minute = 0, seconds = 0;
            if (dateTime.Length >= 4)
            {
                if (!int.TryParse(dateTime.Substring(0, 4), out year))
                    year = value.Year;
            }
            if (dateTime.Length >= 6)
            {
                if (!int.TryParse(dateTime.Substring(4, 2), out month))
                    month = value.Month;
            }
            if (dateTime.Length >= 8)
            {
                if (!int.TryParse(dateTime.Substring(6, 2), out day))
                    day = value.Day;
            }
            if (dateTime.Length >= 10)
            {
                if (!int.TryParse(dateTime.Substring(8, 2), out hour))
                    hour = 0;
            }
            if (dateTime.Length >= 12)
            {
                if (!int.TryParse(dateTime.Substring(10, 2), out minute))
                    minute = 0;
            }
            if (dateTime.Length >= 14)
            {
                if (!int.TryParse(dateTime.Substring(12, 2), out seconds))
                    seconds = 0;
            }
            try
            {
                value = new DateTime(year, month, day, hour, minute, seconds);
            }
            catch (Exception e)
            {
                return DateTime.MinValue;
                //throw new MuchinfoException(ExceptionManager.UnknownClientErrorCode, e);
            }
            return value;
        }

        /// <summary>
        /// 转换成中文金额
        /// </summary>
        /// <param name="x">The x.</param>
        /// <returns>System.String.</returns>
        public static string ConvertToChinese(double x)
        {
            if (x.Equals(0)) return "零";
            string s = x.ToString("#E#D#C#H#E#D#C#G#E#D#C#F#E#D#C#.0B0A");
            string d = Regex.Replace(s, @"((?<=-|^)[^1-9]*)|((?'z'0)[0A-E]*((?=[1-9])|(?'-z'(?=[F-L\.]|$))))|((?'b'[F-L])(?'z'0)[0A-L]*((?=[1-9])|(?'-z'(?=[\.]|$))))", "${b}${z}");
            return Regex.Replace(d, ".", m => "负元空零壹贰叁肆伍陆柒捌玖空空空空空空空分角拾佰仟万亿兆"[m.Value[0] - '-'].ToString());
        }

        /// <summary>
        /// 转换成中文金额
        /// </summary>
        /// <param name="x">The x.</param>
        /// <returns>System.String.</returns>
        public static string ConvertToChinese(decimal x)
        {
            if (x.Equals(0) || x < 0) return "零";
            string s = x.ToString("#E#D#C#H#E#D#C#G#E#D#C#F#E#D#C#.0B0A");
            string d = Regex.Replace(s, @"((?<=-|^)[^1-9]*)|((?'z'0)[0A-E]*((?=[1-9])|(?'-z'(?=[F-L\.]|$))))|((?'b'[F-L])(?'z'0)[0A-L]*((?=[1-9])|(?'-z'(?=[\.]|$))))", "${b}${z}");
            return Regex.Replace(d, ".", m => "负元空零壹贰叁肆伍陆柒捌玖空空空空空空空分角拾佰仟万亿兆"[m.Value[0] - '-'].ToString());
        }

        /// <summary>
        /// 从无格式化紧凑时间字符串还原回日期时间类型
        /// </summary>
        /// <param name="time">时间</param>
        /// <param name="useNow">是否使用系统当前时间</param>
        /// <returns>日期时间实例</returns>
        public static DateTime DateTimeFromTimeString(string time, bool useNow)
        {
            DateTime value = DateTime.MinValue;
            if (useNow) value = DateTime.Now.Date;
            return FromTimeString(value, time);
        }

        /// <summary>
        /// 从无格式化紧凑时间字符串还原回日期时间类型
        /// </summary>
        /// <param name="time">时间</param>
        /// <param name="dateTime">日期</param>
        /// <returns>日期时间实例</returns>
        public static DateTime DateTimeFromTimeString(string time, DateTime dateTime)
        {
            DateTime value = dateTime;
            return FromTimeString(value, time);
        }

        /// <summary>
        /// 将百分比数值转换为字符串
        /// </summary>
        /// <param name="rate">百分比数值</param>
        /// <param name="percentPlus">是否显示百分比符号</param>
        /// <returns>字符串</returns>
        public static string RateToString(decimal rate, bool percentPlus)
        {
            if (percentPlus)
                return (rate / 100).ToString(PercentFormat, Thread.CurrentThread.CurrentCulture);
            else
                return rate.ToString(PercentFormat2, Thread.CurrentThread.CurrentCulture);
        }

        #endregion Public Static Methods

        #region Private Static Methods

        /// <summary>
        /// Froms the time string.
        /// </summary>
        /// <param name="value">The value.</param>
        /// <param name="time">The time.</param>
        /// <returns>DateTime.</returns>
        private static DateTime FromTimeString(DateTime value, string time)
        {
            int hour = 0, minute = 0, seconds = 0;

            if (time.Length >= 2)
            {
                if (!int.TryParse(time.Substring(0, 2), out hour))
                    hour = 0;
            }
            if (time.Length >= 4)
            {
                if (!int.TryParse(time.Substring(2, 2), out minute))
                    minute = 0;
            }
            if (time.Length >= 6)
            {
                if (!int.TryParse(time.Substring(4, 2), out seconds))
                    seconds = 0;
            }
            try
            {
                return new DateTime(value.Year, value.Month, value.Day, hour, minute, seconds);
            }
            catch
            {
                return value;
            }
        }

        #endregion Private Static Methods

        #endregion Methods
    }

    /// <summary>
    /// 字符串大小写比较器
    /// </summary>
    public class OrdinalIgnoreCaseStringEqualityComparer : IEqualityComparer<string>
    {
        #region Methods

        #region Public Methods

        /// <summary>
        /// 序号排序规则忽略大小写对比两个字符串是否相等
        /// </summary>
        /// <param name="x">字符串1</param>
        /// <param name="y">字符串2</param>
        /// <returns>是否相等</returns>
        public bool Equals(string x, string y)
        {
            return string.Equals(x, y, StringComparison.OrdinalIgnoreCase);
        }

        /// <summary>
        /// 获取字符串对象的哈希码
        /// </summary>
        /// <param name="obj">字符串对象</param>
        /// <returns>哈希码</returns>
        public int GetHashCode(string obj)
        {
            return obj.ToUpperInvariant().GetHashCode();
        }

        #endregion Public Methods

        #endregion Methods
    }
}