// 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.Allocation;
using osu.Framework.Graphics;
using osu.Game.Graphics;
using osu.Game.Online.Multiplayer;
using osu.Game.Rulesets.Catch;
using osu.Game.Rulesets.Osu;
using osu.Game.Screens.Multi.Lounge.Components;
using osuTK.Graphics;
using osuTK.Input;

namespace osu.Game.Tests.Visual.Multiplayer
{
    public class TestSceneLoungeRoomsContainer : RoomManagerTestScene
    {
        private RoomsContainer container;

        [BackgroundDependencyLoader]
        private void load()
        {
            Child = container = new RoomsContainer
            {
                Anchor = Anchor.Centre,
                Origin = Anchor.Centre,
                Width = 0.5f,
                JoinRequested = joinRequested
            };
        }

        [Test]
        public void TestBasicListChanges()
        {
            AddRooms(3);

            AddAssert("has 3 rooms", () => container.Rooms.Count == 3);
            AddStep("remove first room", () => RoomManager.Rooms.Remove(RoomManager.Rooms.FirstOrDefault()));
            AddAssert("has 2 rooms", () => container.Rooms.Count == 2);
            AddAssert("first room removed", () => container.Rooms.All(r => r.Room.RoomID.Value != 0));

            AddStep("select first room", () => container.Rooms.First().Action?.Invoke());
            AddAssert("first room selected", () => checkRoomSelected(RoomManager.Rooms.First()));

            AddStep("join first room", () => container.Rooms.First().Action?.Invoke());
            AddAssert("first room joined", () => RoomManager.Rooms.First().Status.Value is JoinedRoomStatus);
        }

        [Test]
        public void TestKeyboardNavigation()
        {
            AddRooms(3);

            AddAssert("no selection", () => checkRoomSelected(null));

            press(Key.Down);
            AddAssert("first room selected", () => checkRoomSelected(RoomManager.Rooms.First()));

            press(Key.Up);
            AddAssert("first room selected", () => checkRoomSelected(RoomManager.Rooms.First()));

            press(Key.Down);
            press(Key.Down);
            AddAssert("last room selected", () => checkRoomSelected(RoomManager.Rooms.Last()));

            press(Key.Enter);
            AddAssert("last room joined", () => RoomManager.Rooms.Last().Status.Value is JoinedRoomStatus);
        }

        private void press(Key down)
        {
            AddStep($"press {down}", () => InputManager.Key(down));
        }

        [Test]
        public void TestStringFiltering()
        {
            AddRooms(4);

            AddUntilStep("4 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 4);

            AddStep("filter one room", () => container.Filter(new FilterCriteria { SearchString = "1" }));

            AddUntilStep("1 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 1);

            AddStep("remove filter", () => container.Filter(null));

            AddUntilStep("4 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 4);
        }

        [Test]
        public void TestRulesetFiltering()
        {
            AddRooms(2, new OsuRuleset().RulesetInfo);
            AddRooms(3, new CatchRuleset().RulesetInfo);

            AddUntilStep("5 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 5);

            AddStep("filter osu! rooms", () => container.Filter(new FilterCriteria { Ruleset = new OsuRuleset().RulesetInfo }));

            AddUntilStep("2 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 2);

            AddStep("filter catch rooms", () => container.Filter(new FilterCriteria { Ruleset = new CatchRuleset().RulesetInfo }));

            AddUntilStep("3 rooms visible", () => container.Rooms.Count(r => r.IsPresent) == 3);
        }

        private bool checkRoomSelected(Room room) => Room == room;

        private void joinRequested(Room room) => room.Status.Value = new JoinedRoomStatus();

        private class JoinedRoomStatus : RoomStatus
        {
            public override string Message => "Joined";

            public override Color4 GetAppropriateColour(OsuColour colours) => colours.Yellow;
        }
    }
}