using System.ComponentModel;
using System.Drawing;

namespace System.Windows.Forms
{
    public class ToolStripMenuItem : ToolStripDropDownItem
    {
        private CustomControls.ToolStripMenuItem menuItem;
        private System.Windows.Controls.Image image;
        private Window inputBindingWindow;

        public override string Text
        {
            get => menuItem.Header?.ToString();
            set => menuItem.Header = value;
        }

        public bool Checked
        {
            get => menuItem.IsChecked;
            set => menuItem.IsChecked = value;
        }

        public bool CheckOnClick
        {
            get => menuItem.IsCheckable;
            set => menuItem.IsCheckable = value;
        }

        private Keys shortcutKeys;
        public Keys ShortcutKeys
        {
            get => shortcutKeys;
            set
            {
                shortcutKeys = value;
                var typeConverter = TypeDescriptor.GetConverter(value);
                menuItem.InputGestureText = typeConverter.ConvertToString(value);
                SetInputBinding(true);
            }
        }

        // in WPF, used to indicate that an item must be placed in the quick commands toolbar
        public bool QatItem { get; set; }

        private void MenuItem_PreviewKeyDown(object sender, Input.KeyEventArgs e)
        {
            var args = Helper.GetKeyEventArgs(e);
            if (args.KeyData == ShortcutKeys && Enabled)
            {
                // prevent keys pressed in the TextBox (such as Ctrl+C/V/X) from handling by the menu
                if (e.OriginalSource is System.Windows.Controls.TextBox)
                    return;
                e.Handled = true;
                OnItemClicked();
            }
        }

        internal void SetInputBinding(bool set)
        {
            if (set && ShortcutKeys != Keys.None)
            {
                if (inputBindingWindow == null)
                {
                    inputBindingWindow = System.Windows.Window.GetWindow(menuItem);
                    if (inputBindingWindow != null)
                        inputBindingWindow.PreviewKeyDown += MenuItem_PreviewKeyDown;
                }
            }
            else if (!set)
            {
                if (inputBindingWindow != null)
                {
                    inputBindingWindow.PreviewKeyDown -= MenuItem_PreviewKeyDown;
                    inputBindingWindow = null;
                }
            }
        }

        internal override void AddChild(Control child)
        {
            menuItem.Items.Add(child.control);
        }

        internal override void RemoveChild(Control child)
        {
            menuItem.Items.Remove(child.control);
        }

        internal override void SetChildIndex(Control child, int index)
        {
            menuItem.Items.Insert(index, child.control);
        }

        internal void OnItemClicked()
        {
            OnClick(EventArgs.Empty);
            (GetToolStrip() as ContextMenuStrip)?.DoItemClicked(this);
        }

        public override void ApplyStyle(ToolStripProfessionalRenderer r)
        {
            base.ApplyStyle(r);

            menuItem.Resources["Menu.Static.Background"] = r.MenuStaticBackground;
            menuItem.Resources["Menu.Static.Border"] = r.MenuStaticBorder;
            menuItem.Resources["Menu.Static.Foreground"] = r.Foreground;
            menuItem.Resources["Menu.Disabled.Foreground"] = r.DisabledForeground;
            menuItem.Resources["Menu.Margin.Background"] = r.MenuMarginBackground;
            menuItem.Resources["TopLevelItem.Static.Foreground"] = r.TopLevelMenuItemForeground;
            menuItem.Resources["TopLevelItem.Disabled.Foreground"] = r.TopLevelMenuItemDisabledForeground;
            menuItem.Resources["MenuItem.Check.Background"] = r.MenuItemCheckBackground;
            menuItem.Resources["MenuItem.Check.Border"] = r.MenuItemCheckBorder;
            menuItem.Resources["MenuItem.Highlight.Background"] = r.MenuItemHighlightBackground;
            menuItem.Resources["MenuItem.Highlight.Border"] = r.MenuItemHighlightBorder;
        }

        internal override void ResetImage()
        {
            base.ResetImage();
            if (ImageSource != null)
            {
                if (image == null)
                {
                    image = new();
                    menuItem.Icon = image;
                }
                image.Source = ImageSource;
            }
        }

        public ToolStripMenuItem(string text) : this()
        {
            Text = text;
        }

        public ToolStripMenuItem(string text, Image image) : this()
        {
            Text = text;
            Image = image;
        }

        public ToolStripMenuItem()
        {
            menuItem = new();
            SetControl(menuItem);
            menuItem.HorizontalAlignment = Windows.HorizontalAlignment.Stretch;
            menuItem.VerticalAlignment = VerticalAlignment.Stretch;

            menuItem.Loaded += (s, e) => SetInputBinding(true);
            menuItem.Unloaded += (s, e) => SetInputBinding(false);
            menuItem.Click += (s, e) => OnItemClicked();
            menuItem.SubmenuOpened += (s, e) =>
            {
                e.Handled = true;
                OnDropDownOpening(new CancelEventArgs());
                OnDropDownOpened(e);
            };
            menuItem.SubmenuClosed += (s, e) =>
            {
                e.Handled = true;
                OnDropDownClosed(new ToolStripDropDownClosedEventArgs(ToolStripDropDownCloseReason.ItemClicked));
            };
        }
    }
}