// 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 osu.Framework.Allocation;
using osu.Framework.Bindables;
using osu.Framework.Graphics;
using osu.Framework.Graphics.Containers;
using osu.Framework.Graphics.Shapes;
using osu.Framework.Graphics.Sprites;
using osu.Framework.Input.Events;
using osu.Game.Graphics;
using osu.Game.Users;
using osuTK;
using System;
using System.Linq;

namespace osu.Game.Overlays.Profile.Header
{
    public class PreviousUsernamesContainer : Container
    {
        private const int duration = 200;
        private const int margin = 10;
        private const int width = 350;
        private const int move_offset = 20;

        public readonly Bindable<User> User = new Bindable<User>();

        private readonly HoverIconContainer hoverIcon;
        private readonly ContentContainer contentContainer;

        public PreviousUsernamesContainer()
        {
            AutoSizeAxes = Axes.Y;
            Width = width;
            Children = new Drawable[]
            {
                contentContainer = new ContentContainer(),
                hoverIcon = new HoverIconContainer(),
            };

            hoverIcon.ActivateHover += () =>
            {
                contentContainer.Show();
                this.MoveToY(-move_offset, duration, Easing.OutQuint);
            };

            User.BindValueChanged(onUserChanged);
            Hide();
        }

        private void onUserChanged(ValueChangedEvent<User> user)
        {
            contentContainer.Clear();

            var usernames = user.NewValue.PreviousUsernames;

            if (usernames.Any())
            {
                var amount = usernames.Count();

                for (int i = 0; i < amount; i++)
                {
                    string text = (i + 1 == amount) ? usernames[i] : $@"{usernames[i]},";

                    contentContainer.Usernames.AddText(new SpriteText
                    {
                        Font = OsuFont.GetFont(weight: FontWeight.Bold, italics: true),
                        Text = text,
                    });
                }

                Show();
                return;
            }

            Hide();
        }

        protected override void OnHoverLost(HoverLostEvent e)
        {
            base.OnHoverLost(e);
            contentContainer.Hide();
            this.MoveToY(0, duration, Easing.OutQuint);
        }

        private class ContentContainer : VisibilityContainer
        {
            private const int header_height = 25;
            private const int content_padding = 60;

            public readonly TextFlowContainer Usernames;

            private readonly Box background;

            public ContentContainer()
            {
                AutoSizeAxes = Axes.Y;
                RelativeSizeAxes = Axes.X;
                Masking = true;
                AlwaysPresent = true;
                CornerRadius = 5;
                Children = new Drawable[]
                {
                    background = new Box
                    {
                        RelativeSizeAxes = Axes.Both,
                    },
                    new FillFlowContainer
                    {
                        RelativeSizeAxes = Axes.X,
                        AutoSizeAxes = Axes.Y,
                        Direction = FillDirection.Vertical,
                        Spacing = new Vector2(0, 5),
                        Children = new Drawable[]
                        {
                            new Container
                            {
                                RelativeSizeAxes = Axes.X,
                                Height = header_height,
                                Children = new Drawable[]
                                {
                                    new SpriteText
                                    {
                                        Anchor = Anchor.BottomLeft,
                                        Origin = Anchor.BottomLeft,
                                        Padding = new MarginPadding { Left = content_padding },
                                        Text = @"formerly known as",
                                        Font = OsuFont.GetFont(size: 14, italics: true)
                                    }
                                }
                            },
                            Usernames = new TextFlowContainer
                            {
                                RelativeSizeAxes = Axes.X,
                                AutoSizeAxes = Axes.Y,
                                Direction = FillDirection.Full,
                                Spacing = new Vector2(5, 5),
                                Padding = new MarginPadding { Left = content_padding, Bottom = margin },
                            },
                        }
                    }
                };
            }

            [BackgroundDependencyLoader]
            private void load(OsuColour colours)
            {
                background.Colour = colours.GreySeafoamDarker;
            }

            public override void Clear(bool disposeChildren) => Usernames.Clear(disposeChildren);

            protected override void PopIn() => this.FadeIn(duration, Easing.OutQuint);

            protected override void PopOut() => this.FadeOut(duration, Easing.OutQuint);
        }

        private class HoverIconContainer : Container
        {
            public Action ActivateHover;

            public HoverIconContainer()
            {
                AutoSizeAxes = Axes.Both;
                Child = new SpriteIcon
                {
                    Margin = new MarginPadding(margin) { Top = 6 },
                    Size = new Vector2(20),
                    Icon = FontAwesome.Solid.IdCard,
                };
            }

            protected override bool OnHover(HoverEvent e)
            {
                ActivateHover?.Invoke();
                return base.OnHover(e);
            }
        }
    }
}