// 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.Linq;
using NUnit.Framework;
using osu.Framework.Bindables;
using osu.Framework.Screens;
using osu.Framework.Testing;
using osu.Game.Graphics.Containers;
using osu.Game.Online.Rooms;
using osu.Game.Screens.OnlinePlay.Lounge.Components;
using osu.Game.Screens.OnlinePlay.Playlists;
using osu.Game.Tests.Visual.OnlinePlay;
using osuTK.Input;

namespace osu.Game.Tests.Visual.Playlists
{
    public class TestScenePlaylistsLoungeSubScreen : OnlinePlayTestScene
    {
        protected new TestRoomManager RoomManager => (TestRoomManager)base.RoomManager;

        private TestLoungeSubScreen loungeScreen;

        public override void SetUpSteps()
        {
            base.SetUpSteps();

            AddStep("push screen", () => LoadScreen(loungeScreen = new TestLoungeSubScreen()));

            AddUntilStep("wait for present", () => loungeScreen.IsCurrentScreen());
        }

        private RoomsContainer roomsContainer => loungeScreen.ChildrenOfType<RoomsContainer>().First();

        [Test]
        public void TestManyRooms()
        {
            AddStep("add rooms", () => RoomManager.AddRooms(500));
        }

        [Test]
        public void TestScrollByDraggingRooms()
        {
            AddStep("reset mouse", () => InputManager.ReleaseButton(MouseButton.Left));

            AddStep("add rooms", () => RoomManager.AddRooms(30));
            AddUntilStep("wait for rooms", () => roomsContainer.Rooms.Count == 30);

            AddUntilStep("first room is not masked", () => checkRoomVisible(roomsContainer.Rooms[0]));

            AddStep("move mouse to third room", () => InputManager.MoveMouseTo(roomsContainer.Rooms[2]));
            AddStep("hold down", () => InputManager.PressButton(MouseButton.Left));
            AddStep("drag to top", () => InputManager.MoveMouseTo(roomsContainer.Rooms[0]));

            AddAssert("first and second room masked", ()
                => !checkRoomVisible(roomsContainer.Rooms[0]) &&
                   !checkRoomVisible(roomsContainer.Rooms[1]));
        }

        [Test]
        public void TestScrollSelectedIntoView()
        {
            AddStep("add rooms", () => RoomManager.AddRooms(30));
            AddUntilStep("wait for rooms", () => roomsContainer.Rooms.Count == 30);

            AddUntilStep("first room is not masked", () => checkRoomVisible(roomsContainer.Rooms[0]));

            AddStep("select last room", () => roomsContainer.Rooms[^1].TriggerClick());

            AddUntilStep("first room is masked", () => !checkRoomVisible(roomsContainer.Rooms[0]));
            AddUntilStep("last room is not masked", () => checkRoomVisible(roomsContainer.Rooms[^1]));
        }

        [Test]
        public void TestEnteringRoomTakesLeaseOnSelection()
        {
            AddStep("add rooms", () => RoomManager.AddRooms(1));

            AddAssert("selected room is not disabled", () => !loungeScreen.SelectedRoom.Disabled);

            AddStep("select room", () => roomsContainer.Rooms[0].TriggerClick());
            AddAssert("selected room is non-null", () => loungeScreen.SelectedRoom.Value != null);

            AddStep("enter room", () => roomsContainer.Rooms[0].TriggerClick());

            AddUntilStep("wait for match load", () => Stack.CurrentScreen is PlaylistsRoomSubScreen);

            AddAssert("selected room is non-null", () => loungeScreen.SelectedRoom.Value != null);
            AddAssert("selected room is disabled", () => loungeScreen.SelectedRoom.Disabled);
        }

        private bool checkRoomVisible(DrawableRoom room) =>
            loungeScreen.ChildrenOfType<OsuScrollContainer>().First().ScreenSpaceDrawQuad
                        .Contains(room.ScreenSpaceDrawQuad.Centre);

        private class TestLoungeSubScreen : PlaylistsLoungeSubScreen
        {
            public new Bindable<Room> SelectedRoom => base.SelectedRoom;
        }
    }
}