// 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.Game.Graphics;
using osu.Game.Graphics.Sprites;
using osu.Game.Graphics.UserInterface;
using osu.Game.Online.API.Requests.Responses;
using osuTK;
using System;
using System.Collections.Generic;
using osu.Framework.Graphics.UserInterface;
using osu.Game.Online.API.Requests;
using osu.Framework.Extensions.Color4Extensions;

namespace osu.Game.Overlays.Rankings
{
    public class SpotlightSelector : VisibilityContainer, IHasCurrentValue<APISpotlight>
    {
        private const int duration = 300;

        private readonly Box background;
        private readonly SpotlightsDropdown dropdown;

        private readonly BindableWithCurrent<APISpotlight> current = new BindableWithCurrent<APISpotlight>();

        public Bindable<APISpotlight> Current
        {
            get => current.Current;
            set => current.Current = value;
        }

        public IEnumerable<APISpotlight> Spotlights
        {
            get => dropdown.Items;
            set => dropdown.Items = value;
        }

        protected override bool StartHidden => true;

        private readonly InfoColumn startDateColumn;
        private readonly InfoColumn endDateColumn;
        private readonly InfoColumn mapCountColumn;
        private readonly InfoColumn participantsColumn;
        private readonly Container content;

        public SpotlightSelector()
        {
            RelativeSizeAxes = Axes.X;
            Height = 155;
            Add(content = new Container
            {
                RelativeSizeAxes = Axes.Both,
                Children = new Drawable[]
                {
                    background = new Box
                    {
                        RelativeSizeAxes = Axes.Both,
                    },
                    new Container
                    {
                        RelativeSizeAxes = Axes.Both,
                        Padding = new MarginPadding { Horizontal = OverlayHeader.CONTENT_X_MARGIN },
                        Children = new Drawable[]
                        {
                            dropdown = new SpotlightsDropdown
                            {
                                Anchor = Anchor.TopCentre,
                                Origin = Anchor.TopCentre,
                                RelativeSizeAxes = Axes.X,
                                Current = Current,
                                Depth = -float.MaxValue
                            },
                            new FillFlowContainer
                            {
                                Anchor = Anchor.BottomRight,
                                Origin = Anchor.BottomRight,
                                AutoSizeAxes = Axes.Both,
                                Direction = FillDirection.Horizontal,
                                Spacing = new Vector2(15, 0),
                                Children = new Drawable[]
                                {
                                    startDateColumn = new InfoColumn(@"Start Date"),
                                    endDateColumn = new InfoColumn(@"End Date"),
                                    mapCountColumn = new InfoColumn(@"Map Count"),
                                    participantsColumn = new InfoColumn(@"Participants")
                                }
                            }
                        }
                    }
                }
            });
        }

        [BackgroundDependencyLoader]
        private void load(OverlayColourProvider colourProvider)
        {
            background.Colour = colourProvider.Dark3;
        }

        public void ShowInfo(GetSpotlightRankingsResponse response)
        {
            startDateColumn.Value = dateToString(response.Spotlight.StartDate);
            endDateColumn.Value = dateToString(response.Spotlight.EndDate);
            mapCountColumn.Value = response.BeatmapSets.Count.ToString();
            participantsColumn.Value = response.Spotlight.Participants?.ToString("N0");
        }

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

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

        private string dateToString(DateTimeOffset date) => date.ToString("yyyy-MM-dd");

        private class InfoColumn : FillFlowContainer
        {
            public string Value
            {
                set => valueText.Text = value;
            }

            private readonly OsuSpriteText valueText;

            public InfoColumn(string name)
            {
                AutoSizeAxes = Axes.Both;
                Direction = FillDirection.Vertical;
                Padding = new MarginPadding { Vertical = 15 };
                Children = new Drawable[]
                {
                    new OsuSpriteText
                    {
                        Text = name,
                        Font = OsuFont.GetFont(size: 10),
                    },
                    new Container
                    {
                        AutoSizeAxes = Axes.X,
                        Height = 25,
                        Child = valueText = new OsuSpriteText
                        {
                            Anchor = Anchor.CentreLeft,
                            Origin = Anchor.CentreLeft,
                            Font = OsuFont.GetFont(size: 20, weight: FontWeight.Light),
                        }
                    }
                };
            }

            [BackgroundDependencyLoader]
            private void load(OverlayColourProvider colourProvider)
            {
                valueText.Colour = colourProvider.Content2;
            }
        }

        private class SpotlightsDropdown : OsuDropdown<APISpotlight>
        {
            private DropdownMenu menu;

            protected override DropdownMenu CreateMenu() => menu = base.CreateMenu().With(m => m.MaxHeight = 400);

            protected override DropdownHeader CreateHeader() => new SpotlightsDropdownHeader();

            [BackgroundDependencyLoader]
            private void load(OverlayColourProvider colourProvider)
            {
                // osu-web adds a 0.6 opacity container on top of the 0.5 base one when hovering, 0.8 on a single container here matches the resulting colour
                AccentColour = colourProvider.Background6.Opacity(0.8f);
                menu.BackgroundColour = colourProvider.Background5;
                Padding = new MarginPadding { Vertical = 20 };
            }

            private class SpotlightsDropdownHeader : OsuDropdownHeader
            {
                public SpotlightsDropdownHeader()
                {
                    Height = 48;
                    Text.Font = OsuFont.GetFont(size: 15);
                    Foreground.Padding = new MarginPadding { Horizontal = 10, Vertical = 15 };
                    Margin = Icon.Margin = new MarginPadding(0);
                }

                [BackgroundDependencyLoader]
                private void load(OverlayColourProvider colourProvider)
                {
                    BackgroundColour = colourProvider.Background6.Opacity(0.5f);
                    BackgroundColourHover = colourProvider.Background5;
                }
            }
        }
    }
}