// 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.Threading.Tasks;
using Microsoft.DotNet.RemoteExecutor;
using Xunit;

namespace System.Windows.Forms.Tests
{
    public class TaskDialogTests : IClassFixture<ThreadExceptionFixture>
    {
        [WinFormsFact]
        public void TaskDialog_ShowDialog_SetProperty_SameThread_Success()
        {
            // Run this from another thread as we call Application.EnableVisualStyles.
            using RemoteInvokeHandle invokeHandle = RemoteExecutor.Invoke(() =>
            {
                Application.EnableVisualStyles();
                Control.CheckForIllegalCrossThreadCalls = true;

                TaskDialogPage page = new TaskDialogPage();
                page.Created += (_, __) =>
                {
                    // Set the property in the same thread.
                    page.Text = "X";
                    page.BoundDialog.Close();
                };

                TaskDialog.ShowDialog(page);
            });

            // verify the remote process succeeded
            Assert.Equal(0, invokeHandle.ExitCode);
        }

        [WinFormsFact]
        public void TaskDialog_ShowDialog_SetProperty_DifferentThread_ThrowsInvalidOperationException()
        {
            // Run this from another thread as we call Application.EnableVisualStyles.
            using RemoteInvokeHandle invokeHandle = RemoteExecutor.Invoke(() =>
            {
                Application.EnableVisualStyles();
                Control.CheckForIllegalCrossThreadCalls = true;

                TaskDialogPage page = new TaskDialogPage();
                page.Created += (_, __) =>
                {
                    // Set the property in a different thread.
                    var separateTask = Task.Run(() => page.Text = "X");
                    Assert.Throws<InvalidOperationException>(separateTask.GetAwaiter().GetResult);

                    page.BoundDialog.Close();
                };

                TaskDialog.ShowDialog(page);
            });

            // verify the remote process succeeded
            Assert.Equal(0, invokeHandle.ExitCode);
        }
    }
}
