using System.ComponentModel;
using System.IO;
using System.Windows.Media;

namespace DeskCore;

public class CategoryItem
{
    public required string Name { get; init; }
    public bool IsDesktop { get; init; }
    public int Count { get; set; }
    public string Folder => IsDesktop ? Storage.UserDesktop : Storage.CategoryPath(Name);

    public CategoryMeta? Meta => IsDesktop ? null : AppSettings.Current.Categories.GetValueOrDefault(Name);
    public string Glyph => IsDesktop ? "" : Meta?.Glyph ?? "";
    public Brush? GlyphBrush => CategoryColors.Brush(Meta?.Color);
    public bool HasFence => !IsDesktop && AppSettings.Current.HasFence(Name);
}

/// <summary>Eintrag einer Start-Gruppe in der Seitenleiste.</summary>
public class LaunchGroupItem
{
    public required LaunchGroup Group { get; init; }
    public string Name => Group.Name;
    public int Count => Group.Items.Count;
    public string Glyph => ""; // Abspielen
    public Brush? GlyphBrush => CategoryColors.Brush(Group.Color);
    public bool HasFence => false;
    public bool IsDesktop => true; // blendet den Umsortier-Griff der Kategorien aus
}

public static class CategoryColors
{
    public static readonly (string Name, string Hex)[] All =
    [
        ("Blau", "#3B82F6"), ("Türkis", "#12A594"), ("Grün", "#22A06B"), ("Gelb", "#E2A600"),
        ("Orange", "#F07A1A"), ("Rot", "#E5484D"), ("Pink", "#D6409F"), ("Lila", "#8E4EC6"), ("Grau", "#8B8D98"),
    ];

    public static Brush? Brush(string? hex)
    {
        if (string.IsNullOrEmpty(hex)) return null;
        try
        {
            var b = new SolidColorBrush((Color)ColorConverter.ConvertFromString(hex));
            b.Freeze();
            return b;
        }
        catch { return null; }
    }
}

public static class CategoryGlyphs
{
    public static readonly (string Glyph, string Name)[] All =
    [
        ("", "Ordner"), ("", "Spiele"), ("", "Arbeit"), ("", "Code"),
        ("", "Musik"), ("", "Video"), ("", "Bilder"), ("", "Internet"),
        ("", "Mail"), ("", "Shopping"), ("", "System"), ("", "Werkzeuge"),
        ("", "Dokumente"), ("", "Favoriten"), ("", "Herz"), ("", "Cloud"),
        ("", "Downloads"), ("", "Personen"), ("", "Bibliothek"), ("", "Rechner"),
        ("", "Ideen"), ("", "Zuhause"), ("", "Lernen"), ("", "Erweiterungen"),
        ("", "Computer"), ("", "Sicherheit"), ("", "Ebenen"),
    ];
}

public class IconItem : INotifyPropertyChanged
{
    public required string Path { get; init; }
    public string? Category { get; init; }

    private ImageSource? _icon;
    public ImageSource? Icon
    {
        get => _icon;
        set { _icon = value; PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(Icon))); }
    }

    /// <summary>Nur für Desktop-Icons: Kategorie, in der bereits eine Kopie liegt.</summary>
    public string? SortedInto { get; init; }
    public bool IsSorted => SortedInto is not null;

    public string Name => Storage.DisplayName(Path);

    public string TypeText
    {
        get
        {
            if (Directory.Exists(Path)) return "Ordner";
            var ext = System.IO.Path.GetExtension(Path).ToLowerInvariant();
            return ext switch
            {
                ".lnk" => "Verknüpfung",
                ".url" => "Internetverknüpfung",
                ".exe" => "Programm",
                "" => "Datei",
                _ => ext.TrimStart('.').ToUpperInvariant() + "-Datei",
            };
        }
    }

    public string LocationText => SortedInto is not null ? $"✓ gesichert in {SortedInto}" : Category ?? "";

    public string ToolTip =>
        SortedInto is not null ? $"{Name}\n✓ Bereits gesichert in „{SortedInto}“ – kann vom Desktop gelöscht werden." :
        Category is not null ? $"{Name}\nOrt: {Category}" : $"{Name}\n{TypeText}";

    public event PropertyChangedEventHandler? PropertyChanged;
}