using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace XdCxRhDW.Core.Api
{
    /// <summary>
    /// 星历推算帮助类.该类调用了Tle2XYZ.exe进程
    /// </summary>
    public static class EphHelper2
    {
        private static readonly DateTime dtZero = new DateTime(1970, 1, 1, 0, 0, 0, 0);
        private const string dll = @"AddIns\Tle2XYZ.dll";//此dll已加密

        #region cpp dll Interop 
        [DllImport(dll, EntryPoint = "GenerateXYZByPeriod", CallingConvention = CallingConvention.Cdecl)]
        private extern static void GenerateXYZByPeriod();

        [DllImport(dll, EntryPoint = "GenerateXYZByPeriodWithOrbit", CallingConvention = CallingConvention.Cdecl)]
        private extern static void GenerateXYZByPeriodWithOrbit();

        [DllImport(dll, EntryPoint = "GenerateXYZByTimes", CallingConvention = CallingConvention.Cdecl)]
        private extern static void GenerateXYZByTimes();
        #endregion

        /// <summary>
        /// 推算双行星历
        /// </summary>
        /// <param name="tleStr">双行根数</param>
        /// <param name="dt">指定时刻(北京时间)</param>
        /// <returns></returns>
        public static SatEphDto2 Calc(string tleStr, DateTime dt)
        {
            if (string.IsNullOrWhiteSpace(dll))
                throw new Exception($"找不到{dll}");
            return null;

        }

        /// <summary>
        /// 批量推算双行星历
        /// </summary>
        /// <param name="tleStr">双行根数</param>
        /// <param name="start">起始时刻(北京)</param>
        /// <param name="end">结束(北京)</param>
        /// <param name="spanSeconds">推算间隔(秒)</param>
        /// <returns></returns>
        public static List<SatEphDto2> CalcMult(string tleStr, DateTime start, DateTime end, int spanSeconds)
        {
            if (string.IsNullOrWhiteSpace(dll))
                throw new Exception($"找不到{dll}");
            return null;
        }
        static List<SatEphDto2> ParseResult(string result)
        {
            if (string.IsNullOrWhiteSpace(result))
            {
                throw new Exception("星历推算出现未知错误!");
            }
            var array = result.Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
            List<SatEphDto2> list = new List<SatEphDto2>();
            foreach (var item in array)
            {
                var arrayItem = item.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                for (int i = 0; i < arrayItem.Length; i++)
                {
                    var dto = new SatEphDto2
                    {
                        SatId = Convert.ToInt32(arrayItem[i++]),
                        TleTime = dtZero.AddSeconds(Convert.ToInt64(arrayItem[i++])).AddHours(16),//内部有BUG需要多加8h
                        SatTime = dtZero.AddSeconds(Convert.ToInt64(arrayItem[i++])).AddHours(8),//utc to beijing
                        X = Math.Round(Convert.ToDouble(arrayItem[i++]), 3),
                        Y = Math.Round(Convert.ToDouble(arrayItem[i++]), 3),
                        Z = Math.Round(Convert.ToDouble(arrayItem[i++]), 3),
                        VX = Math.Round(Convert.ToDouble(arrayItem[i++]), 3),
                        VY = Math.Round(Convert.ToDouble(arrayItem[i++]), 3),
                        VZ = Math.Round(Convert.ToDouble(arrayItem[i]), 3)
                    };
                    list.Add(dto);
                }
            }
            return list;

        }
        static SatEphDto2 ParseOneResult(string result)
        {
            if (string.IsNullOrWhiteSpace(result))
            {
                throw new Exception("星历推算出现未知错误!");
            }
            result = result.Replace(";", "");
            var array = result.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
            int i = 0;
            var dto = new SatEphDto2
            {
                SatId = Convert.ToInt32(array[i++]),
                TleTime = dtZero.AddSeconds(Convert.ToInt64(array[i++])).AddHours(16),//内部有BUG需要多加8h
                SatTime = dtZero.AddSeconds(Convert.ToInt64(array[i++])).AddHours(8),//utc to beijing
                X = Math.Round(Convert.ToDouble(array[i++]), 3),
                Y = Math.Round(Convert.ToDouble(array[i++]), 3),
                Z = Math.Round(Convert.ToDouble(array[i++]), 3),
                VX = Math.Round(Convert.ToDouble(array[i++]), 3),
                VY = Math.Round(Convert.ToDouble(array[i++]), 3),
                VZ = Math.Round(Convert.ToDouble(array[i++]), 3)
            };
            return dto;

        }
    }
    public class SatEphDto2
    {
        /// <summary>
        /// 卫星编号
        /// </summary>
        [Display(Name = "卫星编号")]
        public int SatId { get; set; }
        /// <summary>
        /// 卫星时刻(北京时间)
        /// </summary>
        [Display(Name = "卫星时刻")]
        public DateTime SatTime { get; set; }
        /// <summary>
        /// 星历时刻(北京时间)
        /// </summary>
        [Display(Name = "星历时刻")]
        public DateTime TleTime { get; set; }
        /// <summary>
        /// X坐标
        /// </summary>
        [Display(Name = "X")]
        public double X { get; set; }
        /// <summary>
        /// Y坐标
        /// </summary>
        [Display(Name = "Y")]
        public double Y { get; set; }
        /// <summary>
        /// Z坐标
        /// </summary>
        [Display(Name = "Z")]
        public double Z { get; set; }
        /// <summary>
        /// X方向速率
        /// </summary>
        [Display(Name = "VX")]
        public double VX { get; set; }
        /// <summary>
        /// Y方向速率
        /// </summary>
        [Display(Name = "VY")]
        public double VY { get; set; }
        /// <summary>
        /// Z方向速率
        /// </summary>
        [Display(Name = "VZ")]
        public double VZ { get; set; }
        public override string ToString()
        {
            return $"{X},{Y},{Z},{VX},{VY},{VZ}";
        }

    }
}