using System.Collections.ObjectModel;

namespace Adaptation.FileHandlers.txt;

#nullable enable

public class Grade
{

    public Grade(string mean, string stdDev)
    {
        Mean = mean;
        StdDev = stdDev;
    }

    public string Mean { get; }
    public string StdDev { get; }

    internal static Grade? Get(Constant constant, ReadOnlyCollection<string> groups)
    {
        Grade? result;
        string? mean = null;
        string? stdDev = null;
        int[] j = new int[] { 0 };
        foreach (string groupText in groups)
        {
            if (!groupText.Trim().StartsWith(constant.Cassette) || !groupText.Contains(constant.Finished))
                continue;
            mean = string.Empty;
            stdDev = string.Empty;
            Header.ScanPast(groupText, j, constant.Mean);
            mean = Wafer.GetToken(groupText, j);
            if (mean.EndsWith(","))
                mean = mean.Remove(mean.Length - 1, 1);
            Header.ScanPast(groupText, j, constant.STDD);
            stdDev = Wafer.GetToken(groupText, j);
            if (stdDev.EndsWith(","))
                stdDev = stdDev.Remove(stdDev.Length - 1, 1);
        }
        result = mean is null || stdDev is null ? null : new(mean: mean,
                                                            stdDev: stdDev);
        return result;
    }

}