using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace XdCxRhDW.Api
{
    public class DrawDfoLineHelper
    {

        private const string exeName = "locow.exe";
        private static double[] zone = new double[] { -85, 85, -180, 180 }; //定位区域
        /// <summary>
        /// 高轨双星频差线
        /// </summary>
        /// <param name="opt"></param>
        /// <returns></returns>
        /// <exception cref="Exception"></exception>
        public static IEnumerable<(double lon, double lat)> DfoLineTwoStart(DfoLineTwoStartOption opt)
        {
            List<DfoLinePoint> list = new List<DfoLinePoint>();

            string exePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "AddIns\\频差线");
            if (string.IsNullOrWhiteSpace(exePath))
                throw new Exception($"请先调用SetExePath指定{exeName}进程所在路径,支持相对路径");
            if (!Directory.Exists(exePath))
                throw new Exception($"路径[{exePath}]不存在");
            var exeFile = Path.Combine(exePath, exeName);
            if (!File.Exists(exeFile))
                throw new Exception($"文件[{exeFile}]不存在");
            List<string> arguments = new List<string>
            {
                "dfoline",
                $"{opt.TargetDfo}",
                $"{opt.Freq * 1e-6}",
                $"{opt.Turn1 * 1e-6}",
                $"{opt.Turn2 * 1e-6}",
                $"--rec1 {opt.MsAnt[0]} {opt.MsAnt[1]} 0",
                $"--rec2 {opt.NsAnt[0]} {opt.NsAnt[1]} 0",
                $"--eph1 {opt.MsEph[0]} {opt.MsEph[1]} {opt.MsEph[2]} {opt.MsEph[3]} {opt.MsEph[4]} {opt.MsEph[5]}",
                $"--eph2 {opt.NsEph[0]} {opt.NsEph[1]} {opt.NsEph[2]} {opt.NsEph[3]} {opt.NsEph[4]} {opt.NsEph[5]}",
                $"--refdf {opt.RefDfo}",
                $"--reffreq {opt.RefFreq * 1e-6}",
                $"--reflla {opt.RefGeod[0]} {opt.RefGeod[1]} 0"
            };
            Process p = new Process();
            p.StartInfo.WorkingDirectory = exePath;
            p.StartInfo.FileName = exeFile;
            p.StartInfo.Arguments = string.Join(" ", arguments);
            p.StartInfo.CreateNoWindow = true;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.UseShellExecute = false;
            StringBuilder sb = new StringBuilder();
            p.OutputDataReceived += (sender, e) => sb.Append(e.Data);

            p.Start();
            p.BeginOutputReadLine();
            p.WaitForExit();
            if (string.IsNullOrWhiteSpace(sb.ToString()))
            {
                throw new Exception("计算频差线出现未知错误!");
            }
            var array = sb.ToString().Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);

            foreach (var item in array)
            {
                var strs = item.Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
                DfoLinePoint point = new DfoLinePoint();
                point.Lon = Convert.ToDouble(strs[0]);
                point.Lat = Convert.ToDouble(strs[1]);
                list.Add(point);
            }
            var Lines = list.Select(s => (s.Lon, s.Lat));
            return Lines;
        }





    }
}