using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;
using System.IO;
using System.Diagnostics;

namespace GeoSigma.SigmaDrawerUtil
{
    public class Unit
    {
        public enum EType
        {
            UNIT_KM = 0,        //公里 kilometres
            UNIT_M = 1,         //米   metre
            UNIT_DM = 2,        //分米 decimeter
            UNIT_CM = 3,        //厘米 centimeter
            UNIT_MM = 4,        //毫米 millimetres
            UNIT_SECOND = 5,    //秒   second（60分之一分）
            UNIT_MS = 6,        //毫秒 millisecond
            UNIT_FOOT = 7,      //英尺 foot = 304.8mm
            UNIT_INCH = 8,      //英寸 inch = 25.4mm
            UNIT_MILE = 9,      //英里 mile = 1.609*1e6mm
            UNIT_YARD = 10,     //码   yard = 914.4mm
            UNIT_SEA_MILE = 11,     //海里 nautical mile = 1852000mm
            UNIT_RUSSIAN_MILE = 12,     //俄里 Russian mile = 1.0668*1e6mm
            UNIT_RUSSIAN_UNIT_OF_LENGTH = 13,   //俄丈 Russian unit of length = 2133.6mm
            UNIT_JAPANESE_MILE = 14,        //日里 Japanese mile = 3.9273*1e6mm
            UNIT_JAPANESE_FOOT = 15,        //日尺 Japanese foot = 303mm;

            //经纬度单位定义
            UNIT_DEGREE = 16,       //度(360度)
            UNIT_DMS = 17,      //度分秒,即±DDDMMSS.SSSS格式
            UNIT_MINUTE = 18,       //分(60分之一度)
            UNIT_RADIAN = 19,       //弧度
            UNIT_GRAD = 20      //梯度   1梯度=0.015707963267949弧度
        };

        public Unit()
        {
            msPerCM = 100.0;
        }
        /// <summary>
        /// 1标准单位转换为毫米
        /// </summary>
        /// <param name="unit"></param>
        /// <returns></returns>
        public double Millimetres(int unit)
        {
            return Millimetres((EType)unit);
        }
        /// <summary>
        /// 返回的单位为 毫米
        /// </summary>
        /// <param name="unit"></param>
        /// <returns>返回的单位为 毫米</returns>
        public double Millimetres(EType unit)
        {
            switch (unit)
            {
                case EType.UNIT_MM: return 1.0;
                case EType.UNIT_CM: return 10.0;
                case EType.UNIT_DM: return 100.0;
                case EType.UNIT_M: return 1000.0;
                case EType.UNIT_KM: return 1e6;
                case EType.UNIT_SECOND:   //return msPerCM * 0.1 * 1000.0;	//单位为 毫秒/毫米
                case EType.UNIT_MS: return msPerCM * 0.1;         //单位为 毫秒/毫米
                case EType.UNIT_FOOT: return 304.8;
                case EType.UNIT_INCH: return 25.4;
                case EType.UNIT_MILE: return 1.609 * 1e6;
                case EType.UNIT_YARD: return 914.4;
                case EType.UNIT_SEA_MILE: return 1852000.0;
                case EType.UNIT_RUSSIAN_MILE: return 1.0668 * 1e6;
                case EType.UNIT_RUSSIAN_UNIT_OF_LENGTH: return 2133.6;
                case EType.UNIT_JAPANESE_MILE: return 3.9273 * 1e6;
                case EType.UNIT_JAPANESE_FOOT: return 303;
            }
            return 1.0;
        }
        /// <summary>
        /// 转换为毫米
        /// </summary>
        /// <param name="data">转换前数据</param>
        /// <param name="unit">数据单位</param>
        /// <returns>转换为毫米的数据</returns>
        public double Millimetres(double data, EType unit)
        {
            return data * Millimetres(unit);
        }

        /// <summary>
        /// 转换为米
        /// </summary>
        /// <param name="data">转换前的数据</param>
        /// <param name="unit">转换前数据的单位</param>
        /// <returns>转换为米为单位的数据</returns>
        public double Meter(double data, EType unit)
        {
            return Millimetres(data, unit) * 0.001;
        }
        public double Meter(EType unit)
        {
            return Millimetres(unit) * 0.001;
        }

        public double GetMillisecondPerCM()
        {
            return msPerCM;
        }

        double msPerCM;		//(毫秒/厘米)
    }
}