using System.Linq;
using Content.Server.Administration.Logs;
using Content.Server.CartridgeLoader;
using Content.Server.CartridgeLoader.Cartridges;
using Content.Server.GameTicking;
using Content.Server.MassMedia.Components;
using Content.Server.PDA.Ringer;
using Content.Server.Popups;
using Content.Server.StationRecords.Systems;
using Content.Shared.Access.Components;
using Content.Shared.Access.Systems;
using Content.Shared.CartridgeLoader;
using Content.Shared.CartridgeLoader.Cartridges;
using Content.Shared.Database;
using Content.Shared.GameTicking;
using Content.Shared.MassMedia.Components;
using Content.Shared.MassMedia.Systems;
using Content.Shared.PDA;
using Robust.Server.GameObjects;
using Robust.Shared.Containers;
using Robust.Shared.Player;
using Robust.Shared.Timing;

namespace Content.Server.MassMedia.Systems;

public sealed class NewsSystem : EntitySystem
{
    [Dependency] private readonly IGameTiming _timing = default!;
    [Dependency] private readonly UserInterfaceSystem _ui = default!;
    [Dependency] private readonly RingerSystem _ringer = default!;
    [Dependency] private readonly CartridgeLoaderSystem _cartridgeLoaderSystem = default!;
    [Dependency] private readonly SharedAudioSystem _audio = default!;
    [Dependency] private readonly PopupSystem _popup = default!;
    [Dependency] private readonly IAdminLogManager _adminLogger = default!;
    [Dependency] private readonly GameTicker _ticker = default!;
    [Dependency] private readonly AccessReaderSystem _accessReader = default!;
    [Dependency] private readonly StationRecordsSystem _stationRecords = default!;

    // TODO remove this. Dont store data on systems
    private readonly List<NewsArticle> _articles = new List<NewsArticle>();

    public override void Initialize()
    {
        base.Initialize();

        SubscribeLocalEvent<NewsWriteComponent, NewsWriteShareMessage>(OnWriteUiShareMessage);
        SubscribeLocalEvent<NewsWriteComponent, NewsWriteDeleteMessage>(OnWriteUiDeleteMessage);
        SubscribeLocalEvent<NewsWriteComponent, NewsWriteArticlesRequestMessage>(OnRequestWriteUiMessage);

        SubscribeLocalEvent<NewsReadCartridgeComponent, CartridgeUiReadyEvent>(OnReadUiReady);
        SubscribeLocalEvent<NewsReadCartridgeComponent, CartridgeMessageEvent>(OnReadUiMessage);

        SubscribeLocalEvent<RoundRestartCleanupEvent>(OnRoundRestart);
    }

    private void OnRoundRestart(RoundRestartCleanupEvent ev)
    {
        _articles?.Clear();
    }

    public void ToggleUi(EntityUid user, EntityUid deviceEnt, NewsWriteComponent? component)
    {
        if (!Resolve(deviceEnt, ref component))
            return;

        if (!TryComp<ActorComponent>(user, out var actor))
            return;

        _ui.TryToggleUi(deviceEnt, NewsWriteUiKey.Key, actor.PlayerSession);
    }

    public void OnReadUiReady(EntityUid uid, NewsReadCartridgeComponent component, CartridgeUiReadyEvent args)
    {
        UpdateReadUi(uid, args.Loader, component);
    }

    public void UpdateWriteUi(EntityUid uid, NewsWriteComponent component)
    {
        if (!_ui.TryGetUi(uid, NewsWriteUiKey.Key, out _))
            return;

        var state = new NewsWriteBoundUserInterfaceState(_articles.ToArray(), component.ShareAvalible);
        _ui.TrySetUiState(uid, NewsWriteUiKey.Key, state);
    }

    public void UpdateReadUi(EntityUid uid, EntityUid loaderUid, NewsReadCartridgeComponent? component)
    {
        if (!Resolve(uid, ref component))
            return;

        NewsReadLeafArticle(component, 0);

        if (_articles.Any())
            _cartridgeLoaderSystem?.UpdateCartridgeUiState(loaderUid, new NewsReadBoundUserInterfaceState(_articles[component.ArticleNum], component.ArticleNum + 1, _articles.Count, component.NotificationOn));
        else
            _cartridgeLoaderSystem?.UpdateCartridgeUiState(loaderUid, new NewsReadEmptyBoundUserInterfaceState(component.NotificationOn));
    }

    private void OnReadUiMessage(EntityUid uid, NewsReadCartridgeComponent component, CartridgeMessageEvent args)
    {
        if (args is not NewsReadUiMessageEvent message)
            return;

        if (message.Action == NewsReadUiAction.Next)
            NewsReadLeafArticle(component, 1);
        if (message.Action == NewsReadUiAction.Prev)
            NewsReadLeafArticle(component, -1);
        if (message.Action == NewsReadUiAction.NotificationSwith)
            component.NotificationOn = !component.NotificationOn;

        UpdateReadUi(uid, GetEntity(args.LoaderUid), component);
    }

    public void OnWriteUiShareMessage(EntityUid uid, NewsWriteComponent component, NewsWriteShareMessage msg)
    {
        // dont blindly trust input from clients.
        if (msg.Session.AttachedEntity is not {} author)
            return;

        if (!_accessReader.FindAccessItemsInventory(author, out var items))
            return;

        if (!_accessReader.FindStationRecordKeys(author, out var stationRecordKeys, items))
            return;

        string? authorName = null;
        foreach (var item in items)
        {
            // ID Card
            if (TryComp(item, out IdCardComponent? id))
            {
                authorName = id.FullName;
                break;
            }

            if (TryComp(item, out PdaComponent? pda)
                     && pda.ContainedId != null
                     && TryComp(pda.ContainedId, out id))
            {
                authorName = id.FullName;
                break;
            }
        }

        NewsArticle article = new NewsArticle
        {
            Author = authorName,
            Name = (msg.Name.Length <= 25 ? msg.Name.Trim() : $"{msg.Name.Trim().Substring(0, 25)}..."),
            Content = msg.Content,
            ShareTime = _ticker.RoundDuration()

        };

        _audio.PlayPvs(component.ConfirmSound, uid);
        _adminLogger.Add(LogType.Chat, LogImpact.Medium, $"{ToPrettyString(author):actor} created news article {article.Name} by {article.Author}: {article.Content}");
        _articles.Add(article);

        component.ShareAvalible = false;
        component.NextShare = _timing.CurTime + TimeSpan.FromSeconds(component.ShareCooldown);

        UpdateReadDevices();
        UpdateWriteDevices();
        TryNotify();
    }

    public void OnWriteUiDeleteMessage(EntityUid uid, NewsWriteComponent component, NewsWriteDeleteMessage msg)
    {
        if (msg.ArticleNum > _articles.Count)
            return;

        var articleDeleter = msg.Session.AttachedEntity;
        if (CheckDeleteAccess(_articles[msg.ArticleNum], uid, articleDeleter))
        {
            if (articleDeleter != null)
                _adminLogger.Add(LogType.Chat, LogImpact.Medium, $"{ToPrettyString(articleDeleter.Value):actor} deleted news article {_articles[msg.ArticleNum].Name} by {_articles[msg.ArticleNum].Author}: {_articles[msg.ArticleNum].Content}");
            else
                _adminLogger.Add(LogType.Chat, LogImpact.Medium, $"{msg.Session.Name:actor} created news article {_articles[msg.ArticleNum].Name}: {_articles[msg.ArticleNum].Content}");
            _articles.RemoveAt(msg.ArticleNum);
            _audio.PlayPvs(component.ConfirmSound, uid);
        }
        else
        {
            _popup.PopupEntity(Loc.GetString("news-write-no-access-popup"), uid);
            _audio.PlayPvs(component.NoAccessSound, uid);
        }

        UpdateReadDevices();
        UpdateWriteDevices();
    }

    public void OnRequestWriteUiMessage(EntityUid uid, NewsWriteComponent component, NewsWriteArticlesRequestMessage msg)
    {
        UpdateWriteUi(uid, component);
    }

    private void NewsReadLeafArticle(NewsReadCartridgeComponent component, int leafDir)
    {
        component.ArticleNum += leafDir;

        if (component.ArticleNum >= _articles.Count) component.ArticleNum = 0;
        if (component.ArticleNum < 0) component.ArticleNum = _articles.Count - 1;
    }

    private void TryNotify()
    {
        var query = EntityQueryEnumerator<CartridgeLoaderComponent, RingerComponent, ContainerManagerComponent>();

        while (query.MoveNext(out var uid, out var comp, out var ringer, out var cont))
        {
            if (!_cartridgeLoaderSystem.HasProgram<NewsReadCartridgeComponent>(uid, false, comp, cont))
                continue;

            _ringer.RingerPlayRingtone(uid, ringer);
        }
    }

    private void UpdateReadDevices()
    {
        var query = EntityQueryEnumerator<CartridgeLoaderComponent>();

        while (query.MoveNext(out var owner, out var comp))
        {
            if (EntityManager.TryGetComponent<NewsReadCartridgeComponent>(comp.ActiveProgram, out var cartridge))
                UpdateReadUi(comp.ActiveProgram.Value, owner, cartridge);
        }
    }

    private void UpdateWriteDevices()
    {
        var query = EntityQueryEnumerator<NewsWriteComponent>();

        while (query.MoveNext(out var owner, out var comp))
        {
            UpdateWriteUi(owner, comp);
        }
    }

    private bool CheckDeleteAccess(NewsArticle articleToDelete, EntityUid device, EntityUid? user)
    {
        if (EntityManager.TryGetComponent<AccessReaderComponent>(device, out var accessReader) &&
            user.HasValue &&
            _accessReader.IsAllowed(user.Value, device, accessReader))
        {
            return true;
        }

        if (articleToDelete.AuthorStationRecordKeyIds == null ||
            !articleToDelete.AuthorStationRecordKeyIds.Any())
        {
            return true;
        }

        var conv = _stationRecords.Convert(articleToDelete.AuthorStationRecordKeyIds);
        if (user.HasValue
            && _accessReader.FindStationRecordKeys(user.Value, out var recordKeys)
            && recordKeys.Intersect(conv).Any())
        {
            return true;
        }

        return false;
    }

    public override void Update(float frameTime)
    {
        base.Update(frameTime);

        var query = EntityQueryEnumerator<NewsWriteComponent>();
        while (query.MoveNext(out var uid, out var comp))
        {
            if (comp.ShareAvalible || _timing.CurTime < comp.NextShare)
                continue;

            comp.ShareAvalible = true;

            UpdateWriteUi(uid, comp);
        }
    }
}