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

namespace XdCxRhDW.App.Api.星历推算
{
    /// <summary>
    /// 星历推算
    /// </summary>
    public static class Tle2XYZ
    {
        public static double[] GetXyz(String tle, DateTime dt)
        {
            var lines = tle.Split(';');
            var dz = new DateTime(1970, 1, 1, 8, 0, 0);
            Process p = new Process();
            p.StartInfo.FileName = Path.Combine(p.StartInfo.WorkingDirectory, "API\\星历推算\\Tle2XYZ.exe");
            //-a "1 23467U 95003A   22364.32362671 -.00000025  00000+0  00000+0 0  9992" -b "2 23467   9.8007  17.1777 0001795 205.8937 164.3833  1.00270390102276"
            ////-t 1672718400 -p 1 -c 1
            p.StartInfo.Arguments = $"-a \"{lines[0]}\" -b \"{lines[1]}\" -t {(dt-dz).TotalSeconds} -p 1 -c 1";
            p.StartInfo.CreateNoWindow = true;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.UseShellExecute = false;
            p.Start();
            p.WaitForExit();//WaitForExit加了超时时间的话进程退出后不能保证异步流已经读取完成,这是.NET框架的BUG

            var str = p.StandardOutput.ReadToEnd();

            //解析
            //23467,1672357561,1672718400,-41542540.907490,5369494.210104,-4850802.865098,-44.255811,10.624541,386.892634;
            str = str.Replace(';', ' ').Trim();
            var result = str.Split(',');
            double[] res = new double[6];
            for (int idx = 0; idx < 6; ++idx)
            {
                res[idx] = Convert.ToDouble(result[idx + 3]);
            }
            return res;
        }
    }
}