using System;
using System.Linq;

namespace ExtendedBox.Editors.Attributes;

[AttributeUsage(AttributeTargets.All)]
public sealed class NamespaceTitleAttribute : TitleAttribute
{
    public NamespaceTitleAttribute(Type type, int depth = -1, int skipLast = 0, string separator = " -> ") : base(GetTitle(type, depth, skipLast, separator))
    {
    }

    private static string GetTitle(Type type, int depth, int skipLast, string separator)
    {
        var fullName = type.FullName;
        if(fullName is null)
            return string.Empty;

        if(depth < 0)
            depth = int.MaxValue - 1;

        var splitted = fullName.Split('.').SkipLast(skipLast + 1).TakeLast(depth).Append(type.Name);
        if(!splitted.Any())
            return string.Empty;

        return string.Join(separator, splitted);
    }
}