// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
// See the LICENCE file in the repository root for full licence text.

using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Moq;
using NUnit.Framework;
using osu.Framework.Allocation;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Cursor;
using osu.Framework.Testing;
using osu.Game.Graphics.UserInterface;
using osu.Game.Online.Rooms;
using osu.Game.Overlays;
using osu.Game.Screens.OnlinePlay.Lounge;
using osuTK.Input;

namespace osu.Game.Tests.Visual.Multiplayer
{
    public class TestSceneDrawableLoungeRoom : OsuManualInputManagerTestScene
    {
        private readonly Room room = new Room
        {
            HasPassword = { Value = true }
        };

        [Cached]
        protected readonly OverlayColourProvider ColourProvider = new OverlayColourProvider(OverlayColourScheme.Pink);

        private DrawableLoungeRoom drawableRoom;
        private SearchTextBox searchTextBox;

        private readonly ManualResetEventSlim allowResponseCallback = new ManualResetEventSlim();

        [BackgroundDependencyLoader]
        private void load()
        {
            var mockLounge = new Mock<LoungeSubScreen>();
            mockLounge
                .Setup(l => l.Join(It.IsAny<Room>(), It.IsAny<string>(), It.IsAny<Action<Room>>(), It.IsAny<Action<string>>()))
                .Callback<Room, string, Action<Room>, Action<string>>((a, b, c, d) =>
                {
                    Task.Run(() =>
                    {
                        allowResponseCallback.Wait();
                        allowResponseCallback.Reset();
                        Schedule(() => d?.Invoke("Incorrect password"));
                    });
                });

            Dependencies.CacheAs(mockLounge.Object);
        }

        [SetUpSteps]
        public void SetUpSteps()
        {
            AddStep("create drawable", () =>
            {
                Child = new PopoverContainer
                {
                    RelativeSizeAxes = Axes.Both,
                    Children = new Drawable[]
                    {
                        searchTextBox = new SearchTextBox
                        {
                            HoldFocus = true,
                            Anchor = Anchor.TopCentre,
                            Origin = Anchor.TopCentre,
                            Margin = new MarginPadding(50),
                            Width = 500,
                            Depth = float.MaxValue
                        },
                        drawableRoom = new DrawableLoungeRoom(room)
                        {
                            Anchor = Anchor.Centre,
                            Origin = Anchor.Centre,
                        }
                    }
                };
            });
        }

        [Test]
        public void TestFocusViaKeyboardCommit()
        {
            DrawableLoungeRoom.PasswordEntryPopover popover = null;

            AddAssert("search textbox has focus", () => checkFocus(searchTextBox));
            AddStep("click room twice", () =>
            {
                InputManager.MoveMouseTo(drawableRoom);
                InputManager.Click(MouseButton.Left);
                InputManager.Click(MouseButton.Left);
            });
            AddUntilStep("wait for popover", () => (popover = InputManager.ChildrenOfType<DrawableLoungeRoom.PasswordEntryPopover>().SingleOrDefault()) != null);

            AddAssert("textbox has focus", () => checkFocus(popover.ChildrenOfType<OsuPasswordTextBox>().Single()));

            AddStep("enter password", () => popover.ChildrenOfType<OsuPasswordTextBox>().Single().Text = "password");
            AddStep("commit via enter", () => InputManager.Key(Key.Enter));

            AddAssert("popover has focus", () => checkFocus(popover));

            AddStep("attempt another enter", () => InputManager.Key(Key.Enter));

            AddAssert("popover still has focus", () => checkFocus(popover));

            AddStep("unblock response", () => allowResponseCallback.Set());

            AddUntilStep("wait for textbox refocus", () => checkFocus(popover.ChildrenOfType<OsuPasswordTextBox>().Single()));

            AddStep("press escape", () => InputManager.Key(Key.Escape));
            AddStep("press escape", () => InputManager.Key(Key.Escape));

            AddUntilStep("search textbox has focus", () => checkFocus(searchTextBox));
        }

        [Test]
        public void TestFocusViaMouseCommit()
        {
            DrawableLoungeRoom.PasswordEntryPopover popover = null;

            AddAssert("search textbox has focus", () => checkFocus(searchTextBox));
            AddStep("click room twice", () =>
            {
                InputManager.MoveMouseTo(drawableRoom);
                InputManager.Click(MouseButton.Left);
                InputManager.Click(MouseButton.Left);
            });
            AddUntilStep("wait for popover", () => (popover = InputManager.ChildrenOfType<DrawableLoungeRoom.PasswordEntryPopover>().SingleOrDefault()) != null);

            AddAssert("textbox has focus", () => checkFocus(popover.ChildrenOfType<OsuPasswordTextBox>().Single()));

            AddStep("enter password", () => popover.ChildrenOfType<OsuPasswordTextBox>().Single().Text = "password");

            AddStep("commit via click button", () =>
            {
                var button = popover.ChildrenOfType<OsuButton>().Single();
                InputManager.MoveMouseTo(button);
                InputManager.Click(MouseButton.Left);
            });

            AddAssert("popover has focus", () => checkFocus(popover));

            AddStep("attempt another click", () => InputManager.Click(MouseButton.Left));

            AddAssert("popover still has focus", () => checkFocus(popover));

            AddStep("unblock response", () => allowResponseCallback.Set());

            AddUntilStep("wait for textbox refocus", () => checkFocus(popover.ChildrenOfType<OsuPasswordTextBox>().Single()));

            AddStep("click away", () =>
            {
                InputManager.MoveMouseTo(searchTextBox);
                InputManager.Click(MouseButton.Left);
            });

            AddUntilStep("search textbox has focus", () => checkFocus(searchTextBox));
        }

        private bool checkFocus(Drawable expected) =>
            InputManager.FocusedDrawable == expected;
    }
}