using System.Text;

namespace Adaptation.FileHandlers.csv;

public class LayerHeader
{

#nullable disable

    public string NumberOfLayers { get; set; }
    public List<Layer> Layers { get; set; }

#nullable enable
#pragma warning disable CA1834

    internal static LayerHeader? GetLayerHeader(string[] lines, int start, int stop)
    {
        LayerHeader? result;
        Layer layer;
        string first;
        string[] segments;
        int? secondStart = null;
        List<Layer> layerCollection = new();
        List<string> values = new();
        StringBuilder stringBuilder = new();
        for (int i = start; i < stop; i++)
        {
            segments = lines[i].Split(new string[] { "," }, StringSplitOptions.None);
            first = segments.First();
            if (first == "Layer")
            {
                secondStart = i + 1;
                break;
            }
            _ = stringBuilder.Append(first).Append(",");
            if (segments.Length > 1)
                values.Add(segments[1]);
            else
                values.Add(string.Empty);
        }
        string header = "Number of Layers,";
        if (secondStart is null || stringBuilder.Length != header.Length || stringBuilder.ToString() != header)
            result = null;
        else
        {
            result = new()
            {
                NumberOfLayers = values[0],
                Layers = layerCollection,
            };
            for (int i = secondStart.Value; i < stop; i++)
            {
                segments = lines[i].Split(new string[] { "," }, StringSplitOptions.None);
                if (segments.Length < 15)
                    continue;
                layer = new()
                {
                    FirstPoint = segments[0],
                    LastPoint = segments[1],
                    Type = segments[2],
                    Smoothing = segments[3],
                    Apply = segments[4],
                    SOrder = segments[5],
                    GOrder = segments[6],
                    Correction = segments[7],
                    Conversion = segments[8],
                    JunctionOption = segments[9],
                    JunctionConstant = segments[10],
                    CurrentDensity = segments[11],
                    M1M2Tolerance = segments[12],
                    Sheet = segments[13],
                    Dose = segments[14],
                };
                layerCollection.Add(layer);
            }
        }
        return result;
    }

}