// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE

using osu.Game.Online.Chat;
using System;
using System.Diagnostics;
using System.Linq;
using osu.Framework.Allocation;
using osu.Framework.Graphics.Sprites;
using System.Collections.Generic;
using osu.Game.Overlays;
using osu.Game.Overlays.Notifications;

namespace osu.Game.Graphics.Containers
{
    public class LinkFlowContainer : OsuTextFlowContainer
    {
        public LinkFlowContainer(Action<SpriteText> defaultCreationParameters = null)
            : base(defaultCreationParameters)
        {
        }

        public override bool HandleMouseInput => true;

        private OsuGame game;

        private Action showNotImplementedError;

        [BackgroundDependencyLoader(true)]
        private void load(OsuGame game, NotificationOverlay notifications)
        {
            // will be null in tests
            this.game = game;

            showNotImplementedError = () => notifications?.Post(new SimpleNotification
            {
                Text = @"This link type is not yet supported!",
                Icon = FontAwesome.fa_life_saver,
            });
        }

        public void AddLinks(string text, List<Link> links)
        {
            if (string.IsNullOrEmpty(text) || links == null)
                return;

            if (links.Count == 0)
            {
                AddText(text);
                return;
            }

            int previousLinkEnd = 0;
            foreach (var link in links)
            {
                AddText(text.Substring(previousLinkEnd, link.Index - previousLinkEnd));
                AddLink(text.Substring(link.Index, link.Length), link.Url, link.Action, link.Argument);
                previousLinkEnd = link.Index + link.Length;
            }

            AddText(text.Substring(previousLinkEnd));
        }

        public void AddLink(string text, string url, LinkAction linkType = LinkAction.External, string linkArgument = null, string tooltipText = null)
        {
            AddInternal(new DrawableLinkCompiler(AddText(text).ToList())
            {
                TooltipText = tooltipText ?? (url != text ? url : string.Empty),
                Action = () =>
                {
                    switch (linkType)
                    {
                        case LinkAction.OpenBeatmap:
                            // todo: replace this with overlay.ShowBeatmap(id) once an appropriate API call is implemented.
                            if (int.TryParse(linkArgument, out int beatmapId))
                                Process.Start($"https://osu.ppy.sh/b/{beatmapId}");
                            break;
                        case LinkAction.OpenBeatmapSet:
                            if (int.TryParse(linkArgument, out int setId))
                                game?.ShowBeatmapSet(setId);
                            break;
                        case LinkAction.OpenChannel:
                            game?.OpenChannel(linkArgument);
                            break;
                        case LinkAction.OpenEditorTimestamp:
                        case LinkAction.JoinMultiplayerMatch:
                        case LinkAction.Spectate:
                            showNotImplementedError?.Invoke();
                            break;
                        case LinkAction.External:
                            Process.Start(url);
                            break;
                        case LinkAction.OpenUserProfile:
                            if (long.TryParse(linkArgument, out long userId))
                                game?.ShowUser(userId);
                            break;
                        default:
                            throw new NotImplementedException($"This {nameof(LinkAction)} ({linkType.ToString()}) is missing an associated action.");
                    }
                },
            });
        }
    }
}