// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using System;
using System.Collections.Generic;
using System.Windows;
using Microsoft.Internal.VisualStudio.PlatformUI;
using Microsoft.VisualStudio.Shell.Interop;
 
namespace Microsoft.VisualStudio.LanguageServices.Implementation.SolutionExplorer;
 
/// <summary>
/// Called by the Solution Explorer to show a context menu on the items we add to it
/// </summary>
internal sealed class ContextMenuController : IContextMenuController
{
    private readonly int _menuId;
    private readonly Func<IEnumerable<object>, bool> _shouldShowMenu;
    private readonly Action _updateMenu;
 
    public ContextMenuController(int menuId, Func<IEnumerable<object>, bool> shouldShowMenu, Action updateMenu)
    {
        _menuId = menuId;
        _shouldShowMenu = shouldShowMenu;
        _updateMenu = updateMenu;
    }
 
    public bool ShowContextMenu(IEnumerable<object> items, Point location)
    {
        if (!_shouldShowMenu(items))
        {
            return false;
        }
 
        _updateMenu();
 
        var guidContextMenu = Guids.RoslynGroupId;
        return Shell.Package.GetGlobalService(typeof(SVsUIShell)) is IVsUIShell shell && ErrorHandler.Succeeded(shell.ShowContextMenu(
            0,
            ref guidContextMenu,
            _menuId,
            [new POINTS() { x = (short)location.X, y = (short)location.Y }],
            pCmdTrgtActive: null));
    }
}