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

using OpenTK;
using OpenTK.Graphics;
using osu.Framework.Allocation;
using osu.Framework.Configuration;
using osu.Framework.Extensions.Color4Extensions;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Graphics.Textures;
using osu.Framework.Localisation;
using osu.Game.Beatmaps.Drawables;
using osu.Game.Database;
using osu.Game.Graphics;
using osu.Game.Graphics.Containers;
using osu.Game.Graphics.Sprites;
using osu.Game.Online.Multiplayer;
using osu.Game.Users;

namespace osu.Game.Screens.Multiplayer
{
    public class DrawableRoom : OsuClickableContainer
    {
        private const float transition_duration = 100;
        private const float content_padding = 10;
        private const float height = 100;
        private const float side_strip_width = 5;
        private const float cover_width = 145;

        private readonly Box sideStrip;
        private readonly Container coverContainer;
        private readonly OsuSpriteText name, status, beatmapTitle, beatmapDash, beatmapArtist;
        private readonly FillFlowContainer<OsuSpriteText> beatmapInfoFlow;
        private readonly ParticipantInfo participantInfo;
        private readonly ModeTypeInfo modeTypeInfo;

        private readonly Bindable<string> nameBind = new Bindable<string>();
        private readonly Bindable<User> hostBind = new Bindable<User>();
        private readonly Bindable<RoomStatus> statusBind = new Bindable<RoomStatus>();
        private readonly Bindable<GameType> typeBind = new Bindable<GameType>();
        private readonly Bindable<BeatmapInfo> beatmapBind = new Bindable<BeatmapInfo>();
        private readonly Bindable<User[]> participantsBind = new Bindable<User[]>();

        private OsuColour colours;
        private TextureStore textures;
        private LocalisationEngine localisation;

        public readonly Room Room;

        public DrawableRoom(Room room)
        {
            Room = room;

            RelativeSizeAxes = Axes.X;
            Height = height;
            CornerRadius = 5;
            Masking = true;
            EdgeEffect = new EdgeEffectParameters
            {
                Type = EdgeEffectType.Shadow,
                Colour = Color4.Black.Opacity(40),
                Radius = 5,
            };

            Children = new Drawable[]
            {
                new Box
                {
                    RelativeSizeAxes = Axes.Both,
                    Colour = OsuColour.FromHex(@"212121"),
                },
                sideStrip = new Box
                {
                    RelativeSizeAxes = Axes.Y,
                    Width = side_strip_width,
                },
                new Container
                {
                    Width = cover_width,
                    RelativeSizeAxes = Axes.Y,
                    Masking = true,
                    Margin = new MarginPadding { Left = side_strip_width },
                    Children = new Drawable[]
                    {
                        new Box
                        {
                            RelativeSizeAxes = Axes.Both,
                            Colour = Color4.Black,
                        },
                        coverContainer = new Container
                        {
                            RelativeSizeAxes = Axes.Both,
                        },
                    },
                },
                new Container
                {
                    RelativeSizeAxes = Axes.Both,
                    Padding = new MarginPadding
                    {
                        Vertical = content_padding,
                        Left = side_strip_width + cover_width + content_padding,
                        Right = content_padding,
                    },
                    Children = new Drawable[]
                    {
                        new FillFlowContainer
                        {
                            RelativeSizeAxes = Axes.X,
                            AutoSizeAxes = Axes.Y,
                            Direction = FillDirection.Vertical,
                            Spacing = new Vector2(5f),
                            Children = new Drawable[]
                            {
                                name = new OsuSpriteText
                                {
                                    TextSize = 18,
                                },
                                participantInfo = new ParticipantInfo(),
                            },
                        },
                        new FillFlowContainer
                        {
                            Anchor = Anchor.BottomLeft,
                            Origin = Anchor.BottomLeft,
                            RelativeSizeAxes = Axes.X,
                            AutoSizeAxes = Axes.Y,
                            Direction = FillDirection.Vertical,
                            Children = new Drawable[]
                            {
                                status = new OsuSpriteText
                                {
                                    TextSize = 14,
                                    Font = @"Exo2.0-Bold",
                                },
                                beatmapInfoFlow = new FillFlowContainer<OsuSpriteText>
                                {
                                    RelativeSizeAxes = Axes.X,
                                    AutoSizeAxes = Axes.Y,
                                    Direction = FillDirection.Horizontal,
                                    Children = new[]
                                    {
                                        beatmapTitle = new OsuSpriteText
                                        {
                                            TextSize = 14,
                                            Font = @"Exo2.0-BoldItalic",
                                        },
                                        beatmapDash = new OsuSpriteText
                                        {
                                            TextSize = 14,
                                            Font = @"Exo2.0-BoldItalic",
                                        },
                                        beatmapArtist = new OsuSpriteText
                                        {
                                            TextSize = 14,
                                            Font = @"Exo2.0-RegularItalic",
                                        },
                                    },
                                },
                            },
                        },
                        modeTypeInfo = new ModeTypeInfo
                        {
                            Anchor = Anchor.BottomRight,
                            Origin = Anchor.BottomRight,
                        },
                    },
                },
            };

            nameBind.ValueChanged += displayName;
            hostBind.ValueChanged += displayUser;
            typeBind.ValueChanged += displayGameType;
            participantsBind.ValueChanged += displayParticipants;

            nameBind.BindTo(Room.Name);
            hostBind.BindTo(Room.Host);
            statusBind.BindTo(Room.Status);
            typeBind.BindTo(Room.Type);
            beatmapBind.BindTo(Room.Beatmap);
            participantsBind.BindTo(Room.Participants);
        }

        [BackgroundDependencyLoader]
        private void load(OsuColour colours, TextureStore textures, LocalisationEngine localisation)
        {
            this.localisation = localisation;
            this.textures = textures;
            this.colours = colours;

            beatmapInfoFlow.Colour = colours.Gray9;

            //binded here instead of ctor because dependencies are needed
            statusBind.ValueChanged += displayStatus;
            beatmapBind.ValueChanged += displayBeatmap;

            statusBind.TriggerChange();
            beatmapBind.TriggerChange();
        }

        private void displayName(string value)
        {
            name.Text = value;
        }

        private void displayUser(User value)
        {
            participantInfo.Host = value;
        }

        private void displayStatus(RoomStatus value)
        {
            if (value == null) return;
            status.Text = value.Message;

            foreach (Drawable d in new Drawable[] { sideStrip, status })
                d.FadeColour(value.GetAppropriateColour(colours), 100);
        }

        private void displayGameType(GameType value)
        {
            modeTypeInfo.Type = value;
        }

        private void displayBeatmap(BeatmapInfo value)
        {
            modeTypeInfo.Beatmap = value;

            if (value != null)
            {
                coverContainer.FadeIn(transition_duration);
                coverContainer.Children = new[]
                {
                    new AsyncLoadWrapper(new BeatmapSetBackgroundSprite(value.BeatmapSet)
                    {
                        Anchor = Anchor.Centre,
                        Origin = Anchor.Centre,
                        FillMode = FillMode.Fill,
                        OnLoadComplete = d => d.FadeInFromZero(400, EasingTypes.Out),
                    }) { RelativeSizeAxes = Axes.Both },
                };

                beatmapTitle.Current = localisation.GetUnicodePreference(value.Metadata.TitleUnicode, value.Metadata.Title);
                beatmapDash.Text = @" - ";
                beatmapArtist.Current = localisation.GetUnicodePreference(value.Metadata.ArtistUnicode, value.Metadata.Artist);
            }
            else
            {
                coverContainer.FadeOut(transition_duration);

                beatmapTitle.Current = null;
                beatmapArtist.Current = null;

                beatmapTitle.Text = "Changing map";
                beatmapDash.Text = beatmapArtist.Text = string.Empty;
            }
        }

        private void displayParticipants(User[] value)
        {
            participantInfo.Participants = value;
        }

        private class BeatmapSetBackgroundSprite : Sprite
        {
            private readonly BeatmapSetInfo set;
            public BeatmapSetBackgroundSprite(BeatmapSetInfo set)
            {
                this.set = set;
            }

            [BackgroundDependencyLoader]
            private void load(TextureStore textures)
            {
                string resource = set.OnlineInfo.Covers.Cover;

                if (resource != null)
                    Texture = textures.Get(resource);
            }
        }
    }
}