using System.Text;

namespace Adaptation.FileHandlers.csv;

public class ProfileHeader
{

#nullable disable

    public string NumberOfProfiles { get; set; }
    public List<Profile> Profiles { get; set; }
    public List<ProfilePoint> ProfilePoints { get; set; }

#nullable enable
#pragma warning disable CA1834

    internal static ProfileHeader? GetProfileHeader(string[] lines, int start, int stop)
    {
        ProfileHeader? result;
        string first;
        string[] segments;
        Profile profileInfo;
        ProfilePoint profile;
        int? thirdStart = null;
        int? secondStart = null;
        List<string> values = new();
        List<Profile> profiles = new();
        StringBuilder stringBuilder = new();
        List<ProfilePoint> profilePoints = new();
        for (int i = start; i < stop; i++)
        {
            segments = lines[i].Split(new string[] { "," }, StringSplitOptions.None);
            first = segments.First();
            if (first == "ID")
            {
                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 Profiles,";
        if (secondStart is null || stringBuilder.Length != header.Length || stringBuilder.ToString() != header)
            result = null;
        else
        {
            result = new()
            {
                NumberOfProfiles = values[0],
                Profiles = profiles,
                ProfilePoints = profilePoints,
            };
            for (int i = secondStart.Value; i < stop; i++)
            {
                segments = lines[i].Split(new string[] { "," }, StringSplitOptions.None);
                first = segments.First();
                if (first == "Point")
                {
                    thirdStart = i + 1;
                    break;
                }
                if (segments.Length < 6)
                    continue;
                profileInfo = new()
                {
                    Id = segments[0],
                    Name = segments[1],
                    Label = segments[2],
                    Allocated = segments[3],
                    Used = segments[4],
                    List = segments[5],
                };
                profiles.Add(profileInfo);
            }
            if (thirdStart is not null)
            {
                for (int i = thirdStart.Value; i < stop; i++)
                {
                    segments = lines[i].Split(new string[] { "," }, StringSplitOptions.None);
                    if (segments.Length < 6)
                        continue;
                    profile = new()
                    {
                        Number = segments[0],
                        Depth = segments[1],
                        Raw = segments[2],
                        Edited = segments[3],
                        Resistivity = segments[4],
                        CD = segments[5],
                    };
                    profilePoints.Add(profile);
                }
            }
        }
        return result;
    }

}