using System;
using System.Collections.Generic;
using System.Linq;

namespace Questionable.Model.Changelog;

internal sealed record ChangelogEntry(string Version, DateOnly ReleaseDate, List<ChangeEntry> Changes)
{
	public bool IsNewVersion(string? lastViewedVersion)
	{
		if (string.IsNullOrEmpty(lastViewedVersion))
		{
			return true;
		}
		return CompareVersions(Version, lastViewedVersion) > 0;
	}

	private static int CompareVersions(string version1, string version2)
	{
		int result;
		int[] array = (from p in version1.Split('.')
			select int.TryParse(p, out result) ? result : 0).ToArray();
		int[] array2 = (from p in version2.Split('.')
			select int.TryParse(p, out result) ? result : 0).ToArray();
		int num = Math.Max(array.Length, array2.Length);
		for (int num2 = 0; num2 < num; num2++)
		{
			int num3 = ((num2 < array.Length) ? array[num2] : 0);
			int num4 = ((num2 < array2.Length) ? array2[num2] : 0);
			if (num3 != num4)
			{
				return num3.CompareTo(num4);
			}
		}
		return 0;
	}
}