// 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 JetBrains.Annotations;
using osu.Framework.Allocation;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Logging;
using osu.Game.Rulesets.Edit;
using osu.Game.Screens.Edit.Compose.Components;
using osu.Game.Screens.Edit.Compose.Components.Timeline;
using osu.Game.Skinning;
using osuTK.Graphics;

namespace osu.Game.Screens.Edit.Compose
{
    public class ComposeScreen : EditorScreen
    {
        private const float vertical_margins = 10;
        private const float horizontal_margins = 20;

        private readonly BindableBeatDivisor beatDivisor = new BindableBeatDivisor();

        private HitObjectComposer composer;

        [BackgroundDependencyLoader(true)]
        private void load([CanBeNull] BindableBeatDivisor beatDivisor)
        {
            if (beatDivisor != null)
                this.beatDivisor.BindTo(beatDivisor);

            Container composerContainer;

            Children = new Drawable[]
            {
                new GridContainer
                {
                    RelativeSizeAxes = Axes.Both,
                    Content = new[]
                    {
                        new Drawable[]
                        {
                            new Container
                            {
                                Name = "Timeline",
                                RelativeSizeAxes = Axes.Both,
                                Children = new Drawable[]
                                {
                                    new Box
                                    {
                                        RelativeSizeAxes = Axes.Both,
                                        Colour = Color4.Black.Opacity(0.5f)
                                    },
                                    new Container
                                    {
                                        Name = "Timeline content",
                                        RelativeSizeAxes = Axes.Both,
                                        Padding = new MarginPadding { Horizontal = horizontal_margins, Vertical = vertical_margins },
                                        Child = new GridContainer
                                        {
                                            RelativeSizeAxes = Axes.Both,
                                            Content = new[]
                                            {
                                                new Drawable[]
                                                {
                                                    new Container
                                                    {
                                                        RelativeSizeAxes = Axes.Both,
                                                        Padding = new MarginPadding { Right = 5 },
                                                        Child = new TimelineArea { RelativeSizeAxes = Axes.Both }
                                                    },
                                                    new BeatDivisorControl(beatDivisor) { RelativeSizeAxes = Axes.Both }
                                                },
                                            },
                                            ColumnDimensions = new[]
                                            {
                                                new Dimension(),
                                                new Dimension(GridSizeMode.Absolute, 90),
                                            }
                                        },
                                    }
                                }
                            }
                        },
                        new Drawable[]
                        {
                            composerContainer = new Container
                            {
                                Name = "Composer content",
                                RelativeSizeAxes = Axes.Both,
                                Padding = new MarginPadding { Horizontal = horizontal_margins, Vertical = vertical_margins },
                            }
                        }
                    },
                    RowDimensions = new[] { new Dimension(GridSizeMode.Absolute, 110) }
                },
            };

            var ruleset = Beatmap.Value.BeatmapInfo.Ruleset?.CreateInstance();

            if (ruleset == null)
            {
                Logger.Log("Beatmap doesn't have a ruleset assigned.");
                // ExitRequested?.Invoke();
                return;
            }

            composer = ruleset.CreateHitObjectComposer();

            if (composer == null)
            {
                Logger.Log($"Ruleset {ruleset.Description} doesn't support hitobject composition.");
                // ExitRequested?.Invoke();
                return;
            }

            var beatmapSkinProvider = new BeatmapSkinProvidingContainer(Beatmap.Value.Skin);

            // the beatmapSkinProvider is used as the fallback source here to allow the ruleset-specific skin implementation
            // full access to all skin sources.
            var rulesetSkinProvider = new SkinProvidingContainer(ruleset.CreateLegacySkinProvider(beatmapSkinProvider));

            // load the skinning hierarchy first.
            // this is intentionally done in two stages to ensure things are in a loaded state before exposing the ruleset to skin sources.
            composerContainer.Add(
                beatmapSkinProvider.WithChild(
                    rulesetSkinProvider.WithChild(composer)));
        }
    }
}