using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DW5S.DTO;
using DW5S.Entity;
using DW5S.KxcApi;
using DW5S.Repostory;
using DW5S.WebApi;
using Microsoft.AspNetCore.Mvc;
using Serilog;

namespace DW5S.Controllers
{
    /// <summary>
    /// 星历推算功能相关接口
    /// </summary>
    public class XlController : BaseController
    {
        ILogger logger { get; set; }

        IUnitOfWork unitOfWork { get; set; }

        /// <summary>
        /// 导入Tle星历文件
        /// </summary>
        /// <param name="dto">星历导入参数</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<AjaxResult<RecordRes>> ImportTleAsync(XlImportDto dto)
        {
            //https://www.space-track.org/documentation#tle网站上有星历文件格式说明
            string line = null;
            try
            {
                List<XlInfo> tmp = new List<XlInfo>();
                await Task.Run(() =>
                 {
                     var lines = System.IO.File.ReadAllLines(GetLocalFile(dto.File)).ToList();
                     lines.RemoveAll(p => string.IsNullOrWhiteSpace(p));
                     for (int i = 0; i < lines.Count; i += 3)
                     {
                         line = lines[i];
                         var satName = lines[i].Trim();
                         if (satName.StartsWith("0 "))
                             satName = satName.Substring(2).Trim();
                         if (satName.StartsWith("TBA"))//待发布的卫星
                             continue;
                         var line1 = lines[i + 1];
                         var line2 = lines[i + 2];
                         if (line1.Length != 69 || line2.Length != 69)
                         {
                             throw new Exception("星历文件内容错误格式");
                         }
                         XlInfo xl = new XlInfo()
                         {
                             SatName = satName,
                             Line1 = line1,
                             Line2 = line2,
                             SatCode = Convert.ToInt32(line1.Substring(2, 5))
                         };
                         var timeStr = line1.Substring(18, 14).Replace(" ", "");//https://www.space-track.org/documentation#tle星历接口中说这里面可以接受空格
                         var yearStr = timeStr.Substring(0, 2);
                         var dayStr = timeStr.Substring(2, timeStr.Length - 2);
                         var day = Convert.ToDouble(dayStr);
                         var year = 2000 + Convert.ToInt32(yearStr);
                         DateTime dt = new DateTime(year, 1, 1, 0, 0, 0);
                         dt = dt.AddDays(day - 1);
                         xl.TimeUTC = dt;
                         tmp.Add(xl);
                     }
                  
                 });
                var repsXl = unitOfWork.Of<XlInfo>();
                await repsXl.AddOrUpdateAsync(tmp);
                await unitOfWork.SaveAsync(typeof(XlInfo));
                logger.Information($"星历导入成功,共{tmp.Count}条");
                return Success(new RecordRes(tmp.Count));
            }
            catch (Exception ex)
            {
                string msg = $"{line}星历导入异常";
                logger.Error(ex, msg);
                return Error<RecordRes>(msg);
            }
        }

        /// <summary>
        /// 使用指定的双行根数推算某个时间点XYZ星历
        /// </summary>
        /// <param name="dto">推算参数</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<AjaxResult<SatEphResDto>> CalcByTleAsync(XlCalcDto dto)
        {
            try
            {
                var p =await Task.Run(() => EphHelper.Calc(dto.tleStr, dto.SigTime.ToUtc()));
                return Success(new SatEphResDto()
                {
                    SatId = p.SatId,
                    SatTime = p.SatTime.ToLocal(),
                    TleTime = p.TleTime.ToLocal(),
                    Lon = p.Lon,
                    X = p.X,
                    Y = p.Y,
                    Z = p.Z,
                    VX = p.VX,
                    VY = p.VY,
                    VZ = p.VZ,
                });
            }
            catch (Exception ex)
            {
                string msg = $"推算卫星ECEF星历出错,TwoLine={dto.tleStr}";
                return Error<SatEphResDto>(msg);
            }
        }

        /// <summary>
        /// 使用指定的双行根数推算一段时间的XYZ星历
        /// </summary>
        /// <param name="dto">推算参数</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<AjaxResult<List<SatEphResDto>>> MultCalcByTleAsync(XlCalcMultDto dto)
        {
            try
            {
               var eph= await Task.Run(() => EphHelper.CalcMult(dto.tleStr, dto.startTime.ToUtc(), dto.endTime.ToUtc(), dto.spanSeconds));
                return Success(eph.Select(p => new SatEphResDto()
                {
                    SatId = p.SatId,
                    SatTime = p.SatTime.ToLocal(),
                    TleTime = p.TleTime.ToLocal(),
                    Lon = p.Lon,
                    X = p.X,
                    Y = p.Y,
                    Z = p.Z,
                    VX = p.VX,
                    VY = p.VY,
                    VZ = p.VZ,
                }).ToList());
            }
            catch (Exception ex)
            {
                return Error<List<SatEphResDto>>(ex.Message);
            }
        }

        /// <summary>
        /// 自动根据最佳匹配的时刻推算卫星某个时间点XYZ星历
        /// </summary>
        /// <param name="dto">推算参数</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<AjaxResult<SatEphResDto>> CalcAsync(SatDto dto)
        {
            try
            {
                var repsXl = unitOfWork.Of<XlInfo>() as XlRepository;
                var xl1 = await repsXl.GetLatestAsync(dto.SatCode, dto.SigTime);
                var p = await Task.Run(() =>
                {
                    return EphHelper.Calc(xl1.TwoLine, dto.SigTime.ToUtc());
                });
                return Success(new SatEphResDto()
                {
                    SatId = p.SatId,
                    SatTime = p.SatTime.ToLocal(),
                    TleTime = p.TleTime.ToLocal(),
                    Lon = p.Lon,
                    X = p.X,
                    Y = p.Y,
                    Z = p.Z,
                    VX = p.VX,
                    VY = p.VY,
                    VZ = p.VZ,
                }); ;
            }
            catch (Exception ex)
            {
                return Error<SatEphResDto>(ex.Message);
            }
        }
    }
}