using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using System.Web.Http;
using XdCxRhDW.Dto;
using XdCxRhDW.WebApi;

namespace CpuCgServer.Controllers
{
    /// <summary>
    /// Cpu参估接口
    /// </summary>
    public class GpuCgController : BaseController
    {
        /// <summary>
        /// CPU参估计算(需要先上传文件)
        /// </summary>
        /// <param name="dto">CPU参估参数</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<AjaxResult<CpuCgResDto>> Calc(CpuCgDto dto)
        {
            dto.file1 = GetLocalFile(dto.file1);
            dto.file2 = GetLocalFile(dto.file2);
            XcorrStruct xItem = new XcorrStruct();
            xItem.file1 = dto.file1;
            xItem.file2 = dto.file2;
            xItem.samplingRate = dto.samplingRate;
            xItem.dtCenter = dto.dtCenter;
            xItem.dtRange = dto.dtRange;
            xItem.dfRange = dto.dfRange;
            FileInfo file1 = new FileInfo(dto.file1);
            FileInfo file2 = new FileInfo(dto.file2);
            long totalsamp = file1.Length < file2.Length ? file1.Length / 4 : file2.Length / 4;
            //样点数为0时计算所有样本
            if (dto.smpCount == 0)
            {
                xItem.smpCount = (int)totalsamp - dto.smpStart;
            }
            else if (dto.smpCount > 0 && dto.smpCount < 1)
            {
                xItem.smpCount = (int)(totalsamp * dto.smpCount);
            }
            else
            {
                xItem.smpCount = dto.smpCount;
            }
            xItem.smpStart = dto.smpStart;
            xItem.snrThreshold = dto.snrThreshold;

            CpuCgResDto resDto = new CpuCgResDto();
            try
            {
                XcorrUtils xcorr = new XcorrUtils();
                var result = await xcorr.Calc(xItem);
                //开始计算
                if (result.flag == -2)
                {
                    Serilog.Log.Error("参估计算内部错误!");
                    return Error<CpuCgResDto>("参估计算内部错误!");
                }
                else if (result.flag == -1)
                {
                    Serilog.Log.Error("参估计算所需数据超出文件范围!");
                    return Error<CpuCgResDto>("参估计算所需数据超出文件范围!");
                }
                resDto.TimeMs = result.tm;
                resDto.Smpstart = result.smpstart;
                resDto.Smplen = result.smplen;
                if (result.flag == 1)
                {
                    resDto.Dt = result.dt.Value;
                    resDto.Df = result.df.Value;
                    resDto.Snr = result.snr.Value;
                }


            }
            catch (Exception ex)
            {
                Serilog.Log.Error(ex, "执行CPU参估异常");
                return Error<CpuCgResDto>($"执行CPU参估异常");
            }
            return Success(resDto);

        }


        /// <summary>
        /// CPU参估多个时隙的参估计算(需要先上传文件)
        /// </summary>
        /// <param name="dto">CPU多时隙参估参数模型</param>
        /// <returns>返回结果个数始终和传入的时隙个数相同</returns>
        [HttpPost]
        public async Task<AjaxResult<List<CpuCgResDto>>> MultiCalc(CpuCgMultiDto dto)
        {
            dto.file1 = GetLocalFile(dto.file1);
            dto.file2 = GetLocalFile(dto.file2);
            XcorrStruct xItem = new XcorrStruct();
            xItem.file1 = dto.file1;
            xItem.file2 = dto.file2;
            xItem.samplingRate = dto.samplingRate;
            xItem.dtCenter = dto.dtCenter;
            xItem.dtRange = dto.dtRange;
            xItem.dfRange = dto.dfRange;
            xItem.snrThreshold = dto.snrThreshold;

            List<CpuCgResDto> resDtos = new List<CpuCgResDto>();
            foreach (var smpItem in dto.smpPositions)
            {
                XcorrUtils xcorr = new XcorrUtils();
                xItem.smpStart = smpItem.smpStart;
                xItem.smpCount = smpItem.smpCount;
                CpuCgResDto resDto = new CpuCgResDto();
                resDto.Smpstart = xItem.smpStart;
                resDto.Smplen = (long)xItem.smpCount;
                try
                {
                    var result = await xcorr.Calc(xItem);
                    //开始计算
                    if (result.flag == -2)
                    {
                        resDto.Dt = 0;
                        resDto.Df = 0;
                        resDto.Snr = 0;
                        resDtos.Add(resDto);
                        Serilog.Log.Error("参估计算内部错误!");
                    }
                    else if (result.flag == -1)
                    {
                        resDto.Dt = 0;
                        resDto.Df = 0;
                        resDto.Snr = 0;
                        resDtos.Add(resDto);
                        Serilog.Log.Error("参估计算所需数据超出文件范围!");
                    }
                    else
                    {
                        resDto.TimeMs = result.tm;
                        if (result.flag == 1)
                        {
                            resDto.Dt = result.dt.Value;
                            resDto.Df = result.df.Value;
                            resDto.Snr = result.snr.Value;
                            resDtos.Add(resDto);
                        }
                        else
                        {
                            resDto.Dt = 0;
                            resDto.Df = 0;
                            resDto.Snr = 0;
                            resDtos.Add(resDto);
                        }
                    }
                }
                catch (Exception ex)
                {
                    resDto.Dt = 0;
                    resDto.Df = 0;
                    resDto.Snr = 0;
                    resDtos.Add(resDto);
                    Serilog.Log.Error(ex, "执行CPU参估异常");
                }
            }
            return Success(resDtos);

        }
    }
}