using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Data.SqlClient;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web.Http;
using XdCxRhDW.Dto;
using XdCxRhDW.Api;
using XdCxRhDW.Entity;
using XdCxRhDW.Repostory;
using XdCxRhDW.WebApi;

namespace XdCxRhDW.App.Controllers
{
    /// <summary>
    /// 星历推算功能相关接口
    /// </summary>
    public class XlController : BaseController
    {
        /// <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
            {
                var count = await Task.Run(async () =>
                 {
                     var lines = File.ReadAllLines(GetLocalFile(dto.File)).ToList();
                     lines.RemoveAll(p => string.IsNullOrWhiteSpace(p));
                     List<XlInfo> tmp = new List<XlInfo>();
                     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;
                         XlInfo xl = new XlInfo()
                         {
                             SatName = satName,
                             Line1 = lines[i + 1],
                             Line2 = lines[i + 2],
                             SatCode = Convert.ToInt32(lines[i + 1].Substring(2, 5))
                         };
                         var timeStr = lines[i + 1].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);
                         xl.TimeUTC = dt;
                         tmp.Add(xl);
                     }
                     using (RHDWContext db = new RHDWContext())
                     {
                         db.XlInfos.AddRange(tmp);
                         await db.SaveChangesAsync();
                     }
                     return tmp.Count;
                 });
                Serilog.Log.Information($"星历导入成功,共{count}条");
                return Success(new RecordRes(count));
            }
            catch (Exception ex)
            {
                Serilog.Log.Error(ex, $"{line}星历导入异常");
                return Error<RecordRes>(ex.Message);

            }
            finally
            {
                try
                {
                    File.Delete(GetLocalFile(dto.File));
                }
                catch
                { }
            }

        }

        /// <summary>
        /// 推算某个时间点XYZ星历
        /// </summary>
        /// <param name="dto">推算参数</param>
        /// <returns></returns>
        [HttpPost]
        public AjaxResult<SatEphResDto> Calc(XlCalcDto dto)
        {
            try
            {
                var p = EphHelper.Calc(dto.tleStr, dto.SigTime.ToUtc());
                return Success(new SatEphResDto()
                {
                    SatId = p.SatId,
                    SatTime = p.SatTime.AddHours(SysConfig.Config.ZoneHours),
                    TleTime = p.TleTime.AddHours(SysConfig.Config.ZoneHours),
                    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);
            }
        }

        /// <summary>
        /// 推算某个时间段XYZ星星历
        /// </summary>
        /// <param name="dto">推算参数</param>
        /// <returns></returns>
        [HttpPost]
        public AjaxResult<List<EphResDto>> CalcMult(XlCalcMultDto dto)
        {
            try
            {
                var eph = EphHelper.CalcMult(dto.tleStr, dto.startTime.ToUtc(), dto.endTime.ToUtc(), dto.spanSeconds);
                return Success(eph.Select(p => new EphResDto()
                {
                    SatId = p.SatId,
                    SatTime = p.SatTime.AddHours(SysConfig.Config.ZoneHours),
                    TleTime = p.TleTime.AddHours(SysConfig.Config.ZoneHours),
                    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<EphResDto>>(ex.Message);
            }
        }
    }
}