using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;

namespace QuickClaude
{
    // Right-click menu in QuickClaude's own look: dark, square, Consolas, no theme chrome or blue highlight.
    public static class DarkMenu
    {
        // target: the text box whose Cut/Copy/Paste the menu should offer (null for none).
        public static ContextMenu Make(TextBox target, Action newConversation)
        {
            var menu = new ContextMenu
            {
                Template = MenuTemplate,
                FontFamily = MainWindow.Mono,
                FontSize = MainWindow.TextSize,
                Foreground = ConfirmWindow.Text,
                FocusVisualStyle = null,
                HasDropShadow = false
            };

            if (target != null)
            {
                if (!target.IsReadOnly) menu.Items.Add(Item("Cut", ApplicationCommands.Cut, target));
                menu.Items.Add(Item("Copy", ApplicationCommands.Copy, target));
                if (!target.IsReadOnly) menu.Items.Add(Item("Paste", ApplicationCommands.Paste, target));
                menu.Items.Add(new Separator { Template = SeparatorTemplate });
            }

            var fresh = Item("New conversation", null, null);
            fresh.Click += (s, e) => newConversation();
            menu.Items.Add(fresh);
            return menu;
        }

        static MenuItem Item(string header, ICommand command, IInputElement target) => new MenuItem
        {
            Header = header,
            Command = command,
            CommandTarget = target,
            Template = ItemTemplate,
            FocusVisualStyle = null,
            Foreground = ConfirmWindow.Text
        };

        static readonly ControlTemplate MenuTemplate = MakeMenuTemplate();
        static readonly ControlTemplate ItemTemplate = MakeItemTemplate();
        static readonly ControlTemplate SeparatorTemplate = MakeSeparatorTemplate();

        static ControlTemplate MakeMenuTemplate()
        {
            var bd = new FrameworkElementFactory(typeof(Border));
            bd.SetValue(Border.BackgroundProperty, ConfirmWindow.Panel);
            bd.SetValue(Border.BorderBrushProperty, ConfirmWindow.Edge);
            bd.SetValue(Border.BorderThicknessProperty, new Thickness(1));
            bd.SetValue(Border.PaddingProperty, new Thickness(0, 2, 0, 2));
            var items = new FrameworkElementFactory(typeof(StackPanel));
            items.SetValue(Panel.IsItemsHostProperty, true);
            bd.AppendChild(items);
            var t = new ControlTemplate(typeof(ContextMenu)) { VisualTree = bd };
            t.Seal();
            return t;
        }

        // Header only: no icon column, no gesture text. Faint fill when highlighted, dimmed when disabled.
        static ControlTemplate MakeItemTemplate()
        {
            var bd = new FrameworkElementFactory(typeof(Border), "bd");
            bd.SetValue(Border.BackgroundProperty, System.Windows.Media.Brushes.Transparent);
            bd.SetValue(Border.PaddingProperty, new Thickness(10, 3, 16, 3));
            var cp = new FrameworkElementFactory(typeof(ContentPresenter));
            cp.SetValue(ContentPresenter.ContentSourceProperty, "Header");
            cp.SetValue(ContentPresenter.RecognizesAccessKeyProperty, true);
            bd.AppendChild(cp);

            var t = new ControlTemplate(typeof(MenuItem)) { VisualTree = bd };
            var hi = new Trigger { Property = MenuItem.IsHighlightedProperty, Value = true };
            hi.Setters.Add(new Setter(Border.BackgroundProperty, ConfirmWindow.Hover, "bd"));
            var off = new Trigger { Property = UIElement.IsEnabledProperty, Value = false };
            off.Setters.Add(new Setter(UIElement.OpacityProperty, 0.4, "bd"));
            t.Triggers.Add(hi);
            t.Triggers.Add(off);
            t.Seal();
            return t;
        }

        static ControlTemplate MakeSeparatorTemplate()
        {
            var line = new FrameworkElementFactory(typeof(Border));
            line.SetValue(FrameworkElement.HeightProperty, 1.0);
            line.SetValue(FrameworkElement.MarginProperty, new Thickness(0, 3, 0, 3));
            line.SetValue(Border.BackgroundProperty, ConfirmWindow.Edge);
            var t = new ControlTemplate(typeof(Separator)) { VisualTree = line };
            t.Seal();
            return t;
        }
    }
}