using System;
using System.Collections.Generic;
using System.Text;

namespace XdCxRhDw.CpuCgTools
{
    public class CorResult
    {
        /// <summary>
        /// 起始样点
        /// </summary>
        public int Start { get; set; }

        /// <summary>
        /// 样点长度
        /// </summary>
        public int Length { get; set; }

        /// <summary>
        /// 相关时差，单位：us
        /// </summary>
        public double Dto { get; set; }

        /// <summary>
        /// 相关频差：单位：Hz
        /// </summary>
        public double Dfo { get; set; }

        /// <summary>
        /// 相关信噪比，单位：db
        /// </summary>
        public double Snr { get; set; }

        /// <summary>
        /// 计算耗时，毫秒
        /// </summary>
        public double UseTime { get; set; }

        /// <summary>
        /// 是否有效
        /// </summary>
        public bool IsValid { get; set; }

        /// <summary>
        /// 相关峰列表
        /// </summary>
        public List<XgfItem> XgfList { get; set; } = new List<XgfItem>();

        public string Message { get; set; } = string.Empty;

        /// <summary>
        /// 参估结果
        /// </summary>
        public CorResult() { }

        public static CorResult FromLine(string line, double snr)
        {
            if (string.IsNullOrWhiteSpace(line)) throw new ArgumentNullException(nameof(line));
            CorResult corResult = new CorResult();
            var cafItems = line.Split(";".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
            corResult.Message = line;
            if (cafItems.Length == 0) return corResult;
            int i = 0;
            var cafitem = cafItems[i];
            var resitems = cafitem.Split(',');
            if (resitems.Length != 6) return corResult;
            corResult.Start = int.Parse(resitems[0]);
            corResult.Length = int.Parse(resitems[1]);
            corResult.Dto = double.Parse(resitems[2]);
            corResult.Dfo = double.Parse(resitems[3]);
            corResult.Snr = double.Parse(resitems[4]);
            corResult.UseTime = double.Parse(resitems[5]);
            corResult.IsValid = corResult.Snr > snr;
            if (cafItems.Length > 1)
            {
                for (i = 1; i < cafItems.Length; i++)
                {
                    resitems = cafItems[i].Split(',');
                    XgfItem xgfItem = new XgfItem()
                    {
                        Dto = double.Parse(resitems[0]),
                        Dfo = double.Parse(resitems[1]),
                        Snr = double.Parse(resitems[2])
                    };
                    corResult.XgfList.Add(xgfItem);
                }
            }
            return corResult;
        }

        public static CorResult[] FromLines(string result, double snr)
        {
            if (string.IsNullOrWhiteSpace(result))
                return new CorResult[0];
            var lines = result.Split(new string[] {"\r","\n"}, StringSplitOptions.RemoveEmptyEntries);
            CorResult[] results = new CorResult[lines.Length];
            for (int i = 0; i < lines.Length; i++)
            {
                results[i] = FromLine(lines[i], snr);
            }
            return results;
        }
    }

    public class XgfItem
    {
        public XgfItem()
        {
        }

        public XgfItem(double dto, double dfo, double snr)
        {
            Dto = dto;
            Dfo = dfo;
            Snr = snr;
        }

        /// <summary>
        /// 时差(us)
        /// </summary>
        public double Dto { get; set; }

        /// <summary>
        /// 频差(Hz)
        /// </summary>
        public double Dfo { get; set; }

        /// <summary>
        /// 信噪比(dB)
        /// </summary>
        public double Snr { get; set; }
    }
}