// Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using System;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Colour;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Primitives;
using osu.Framework.Graphics.Sprites;
using osu.Game.Database;
using osu.Game.Graphics;
using osu.Game.Graphics.Backgrounds;
using osu.Game.Graphics.UserInterface;
using OpenTK;
using OpenTK.Graphics;
using osu.Framework.Input;
using osu.Game.Graphics.Sprites;

namespace osu.Game.Beatmaps.Drawables
{
    class BeatmapPanel : Panel
    {
        public BeatmapInfo Beatmap;
        private Sprite background;

        public Action<BeatmapPanel> GainedSelection;
        public Action<BeatmapPanel> StartRequested;
        private Triangles triangles;
        private StarCounter starCounter;

        protected override void Selected()
        {
            base.Selected();

            GainedSelection?.Invoke(this);

            background.ColourInfo = ColourInfo.GradientVertical(
                new Color4(20, 43, 51, 255),
                new Color4(40, 86, 102, 255));

            triangles.Colour = Color4.White;
        }

        protected override void Deselected()
        {
            base.Deselected();

            background.Colour = new Color4(20, 43, 51, 255);
            triangles.Colour = OsuColour.Gray(0.5f);
        }

        protected override bool OnClick(InputState state)
        {
            if (State == PanelSelectedState.Selected)
                StartRequested?.Invoke(this);

            return base.OnClick(state);
        }

        protected override void ApplyState(PanelSelectedState last = PanelSelectedState.Hidden)
        {
            base.ApplyState(last);

            if (last == PanelSelectedState.Hidden && State != last)
                starCounter.ReplayAnimation();
        }

        public BeatmapPanel(BeatmapInfo beatmap)
        {
            Beatmap = beatmap;
            Height *= 0.60f;

            Children = new Drawable[]
            {
                background = new Box
                {
                    RelativeSizeAxes = Axes.Both,
                },
                triangles = new Triangles
                {
                    TriangleScale = 2,
                    RelativeSizeAxes = Axes.Both,
                    ColourLight = OsuColour.FromHex(@"3a7285"),
                    ColourDark = OsuColour.FromHex(@"123744")
                },
                new FlowContainer
                {
                    Padding = new MarginPadding(5),
                    FlowStrategy = FlowStrategies.GetHorizontalFlow(),
                    AutoSizeAxes = Axes.Both,
                    Anchor = Anchor.CentreLeft,
                    Origin = Anchor.CentreLeft,
                    Children = new Drawable[]
                    {
                        new DifficultyIcon(beatmap)
                        {
                            Scale = new Vector2(1.8f),
                            Anchor = Anchor.CentreLeft,
                            Origin = Anchor.CentreLeft,
                        },
                        new FlowContainer
                        {
                            Padding = new MarginPadding { Left = 5 },
                            FlowStrategy = FlowStrategies.GetVerticalFlow(),
                            AutoSizeAxes = Axes.Both,
                            Children = new Drawable[]
                            {
                                new FlowContainer
                                {
                                    FlowStrategy = FlowStrategies.GetHorizontalFlow(new Vector2(4, 0)),
                                    AutoSizeAxes = Axes.Both,
                                    Children = new[]
                                    {
                                        new OsuSpriteText
                                        {
                                            Font = @"Exo2.0-Medium",
                                            Text = beatmap.Version,
                                            TextSize = 20,
                                            Anchor = Anchor.BottomLeft,
                                            Origin = Anchor.BottomLeft
                                        },
                                        new OsuSpriteText
                                        {
                                            Font = @"Exo2.0-Medium",
                                            Text = "mapped by",
                                            TextSize = 16,
                                            Anchor = Anchor.BottomLeft,
                                            Origin = Anchor.BottomLeft
                                        },
                                        new OsuSpriteText
                                        {
                                            Font = @"Exo2.0-MediumItalic",
                                            Text = $"{(beatmap.Metadata ?? beatmap.BeatmapSet.Metadata).Author}",
                                            TextSize = 16,
                                            Anchor = Anchor.BottomLeft,
                                            Origin = Anchor.BottomLeft
                                        },
                                    }
                                },
                                starCounter = new StarCounter
                                {
                                    Count = beatmap.StarDifficulty,
                                    Scale = new Vector2(0.8f),
                                }
                            }
                        }
                    }
                }
            };
        }
    }
}