using System.Diagnostics.CodeAnalysis;
using Content.Server.Access.Systems;
using Content.Server.AlertLevel;
using Content.Server.CartridgeLoader;
using Content.Server.Chat.Managers;
using Content.Server.Instruments;
using Content.Server.PDA.Ringer;
using Content.Server.RoundEnd; // WL-Changes: ETA in PDA
using Content.Server.Shuttles.Systems; // WL-Changes: ETA in PDA
using Content.Server.Station.Systems;
using Content.Server.Store.Systems;
using Content.Server.Traitor.Uplink;
using Content.Shared.Access.Components;
using Content.Shared.CartridgeLoader;
using Content.Shared.Chat;
using Content.Shared.DeviceNetwork.Components;
using Content.Shared.GameTicking; // WL-Changes: ETA in PDA
using Content.Shared.Implants;
using Content.Shared.Inventory;
using Content.Shared.Light;
using Content.Shared.Light.EntitySystems;
using Content.Shared.PDA;
using Content.Shared.PDA.Ringer;
using Content.Shared.Store.Components;
using Content.Shared.VoiceMask;
using Robust.Server.Containers;
using Robust.Server.GameObjects;
using Robust.Shared.Containers;
using Robust.Shared.Player;
using Robust.Shared.Prototypes; // WL-Changes: Alert Level Rework
using Robust.Shared.Utility;

namespace Content.Server.PDA
{
    public sealed partial class PdaSystem : SharedPdaSystem
    {
        [Dependency] private CartridgeLoaderSystem _cartridgeLoader = default!;
        [Dependency] private InstrumentSystem _instrument = default!;
        [Dependency] private RingerSystem _ringer = default!;
        [Dependency] private StationSystem _station = default!;
        [Dependency] private StoreSystem _store = default!;
        [Dependency] private IChatManager _chatManager = default!;
        [Dependency] private UserInterfaceSystem _ui = default!;
        [Dependency] private UnpoweredFlashlightSystem _unpoweredFlashlight = default!;
        [Dependency] private ContainerSystem _containerSystem = default!;
        [Dependency] private IdCardSystem _idCard = default!;
        [Dependency] private IPrototypeManager _prototypeManager = default!; // WL-Changes: Alert Level Rework
        // WL-Changes-start: ETA in PDA
        [Dependency] private RoundEndSystem _roundEnd = default!;

        [Access(typeof(EmergencyShuttleSystem), Other = AccessPermissions.None)]
        public TimeSpan? BeforeETA;
        [Access(typeof(RoundEndSystem), Other = AccessPermissions.None)]
        public bool RoundEnd = false;
        // WL-Changes-end

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

            SubscribeLocalEvent<PdaComponent, LightToggleEvent>(OnLightToggle);

            // UI Events:
            SubscribeLocalEvent<PdaComponent, BoundUIOpenedEvent>(OnPdaOpen);
            SubscribeLocalEvent<PdaComponent, PdaRequestUpdateInterfaceMessage>(OnUiMessage);
            SubscribeLocalEvent<PdaComponent, PdaToggleFlashlightMessage>(OnUiMessage);
            SubscribeLocalEvent<PdaComponent, PdaShowRingtoneMessage>(OnUiMessage);
            SubscribeLocalEvent<PdaComponent, PdaShowMusicMessage>(OnUiMessage);
            SubscribeLocalEvent<PdaComponent, PdaShowUplinkMessage>(OnUiMessage);
            SubscribeLocalEvent<PdaComponent, PdaLockUplinkMessage>(OnUiMessage);

            SubscribeLocalEvent<PdaComponent, CartridgeLoaderNotificationSentEvent>(OnNotification);

            SubscribeLocalEvent<StationRenamedEvent>(OnStationRenamed);
            SubscribeLocalEvent<EntityRenamedEvent>(OnEntityRenamed, after: new[] { typeof(IdCardSystem) });
            SubscribeLocalEvent<AlertLevelChangedEvent>(OnAlertLevelChanged);
            SubscribeLocalEvent<PdaComponent, InventoryRelayedEvent<ChameleonControllerOutfitSelectedEvent>>(OnRelayedEventToIdCard);
            SubscribeLocalEvent<PdaComponent, InventoryRelayedEvent<VoiceMaskNameUpdatedEvent>>(OnRelayedEventToIdCard);
            // WL-Changes-start: ETA in PDA
            SubscribeLocalEvent<RoundEndSystemChangedEvent>(_ => UpdateAllPdaUisOnStation());
            SubscribeLocalEvent<RoundRestartCleanupEvent>(_ => Reset());
        }

        private void Reset()
        {
            BeforeETA = null;
            RoundEnd = false;
        }
        // WL-Changes-end

        private void OnRelayedEventToIdCard<T>(Entity<PdaComponent> ent, ref InventoryRelayedEvent<T> args)
        {
            // Relay it to your ID so it can update as well.
            if (ent.Comp.ContainedId != null)
                RaiseLocalEvent(ent.Comp.ContainedId.Value, args);
        }

        private void OnEntityRenamed(ref EntityRenamedEvent ev)
        {
            if (HasComp<IdCardComponent>(ev.Uid))
                return;

            if (_idCard.TryFindIdCard(ev.Uid, out var idCard))
            {
                var query = EntityQueryEnumerator<PdaComponent>();

                while (query.MoveNext(out var uid, out var comp))
                {
                    if (comp.ContainedId == idCard)
                    {
                        SetOwner(uid, comp, ev.Uid, ev.NewName);
                    }
                }
            }
        }

        protected override void OnComponentInit(EntityUid uid, PdaComponent pda, ComponentInit args)
        {
            base.OnComponentInit(uid, pda, args);

            if (!HasComp<UserInterfaceComponent>(uid))
                return;

            UpdateAlertLevel(uid, pda);
            UpdateStationName(uid, pda);
        }

        protected override void OnItemInserted(EntityUid uid, PdaComponent pda, EntInsertedIntoContainerMessage args)
        {
            base.OnItemInserted(uid, pda, args);
            var id = CompOrNull<IdCardComponent>(pda.ContainedId);
            if (id != null)
                pda.OwnerName = id.FullName;
            UpdatePdaUi(uid, pda);
        }

        protected override void OnItemRemoved(EntityUid uid, PdaComponent pda, EntRemovedFromContainerMessage args)
        {
            if (args.Container.ID != pda.IdSlot.ID && args.Container.ID != pda.PenSlot.ID && args.Container.ID != pda.PaiSlot.ID)
                return;

            // TODO: This is super cursed just use compstates please.
            if (MetaData(uid).EntityLifeStage >= EntityLifeStage.Terminating)
                return;

            base.OnItemRemoved(uid, pda, args);
            UpdatePdaUi(uid, pda);
        }

        private void OnLightToggle(EntityUid uid, PdaComponent pda, LightToggleEvent args)
        {
            pda.FlashlightOn = args.IsOn;
            UpdatePdaUi(uid, pda);
        }

        public void SetOwner(EntityUid uid, PdaComponent pda, EntityUid owner, string ownerName)
        {
            pda.OwnerName = ownerName;
            pda.PdaOwner = owner;
            UpdatePdaUi(uid, pda);
        }

        private void OnStationRenamed(StationRenamedEvent ev)
        {
            UpdateAllPdaUisOnStation();
        }

        private void OnAlertLevelChanged(AlertLevelChangedEvent args)
        {
            UpdateAllPdaUisOnStation();
        }

        public void UpdateAllPdaUisOnStation() // WL-Changes: ETA in PDA // private -> public
        {
            var query = AllEntityQuery<PdaComponent>();
            while (query.MoveNext(out var ent, out var comp))
            {
                UpdatePdaUi(ent, comp);
            }
        }

        private void OnNotification(Entity<PdaComponent> ent, ref CartridgeLoaderNotificationSentEvent args)
        {
            _ringer.RingerPlayRingtone(ent.Owner);

            if (!_containerSystem.TryGetContainingContainer((ent, null, null), out var container)
                || !TryComp<ActorComponent>(container.Owner, out var actor))
                return;

            var message = FormattedMessage.EscapeText(args.Message);
            var wrappedMessage = Loc.GetString("pda-notification-message",
                ("header", args.Header),
                ("message", message));

            _chatManager.ChatMessageToOne(
                ChatChannel.Notifications,
                message,
                wrappedMessage,
                EntityUid.Invalid,
                false,
                actor.PlayerSession.Channel);
        }

        /// <summary>
        /// Send new UI state to clients, call if you modify something like uplink.
        /// </summary>
        public override void UpdatePdaUi(EntityUid uid, PdaComponent? pda = null)
        {
            if (!Resolve(uid, ref pda, false))
                return;

            if (!_ui.HasUi(uid, PdaUiKey.Key))
                return;

            var address = GetDeviceNetAddress(uid);
            var hasInstrument = HasComp<InstrumentComponent>(uid);
            var showUplink = TryGetUnlockedStore(uid, out _);

            UpdateStationName(uid, pda);
            UpdateAlertLevel(uid, pda);
            // TODO: Update the level and name of the station with each call to UpdatePdaUi is only needed for latejoin players.
            // TODO: If someone can implement changing the level and name of the station when changing the PDA grid, this can be removed.

            // TODO don't make this depend on cartridge loader!?!?
            if (!TryComp(uid, out CartridgeLoaderComponent? loader))
                return;

            var expectedCountdownEnd = _roundEnd.IsRoundEndRequested() ? _roundEnd.ExpectedCountdownEnd : null; // WL-Changes: ETA in PDA

            var programs = _cartridgeLoader.GetAvailablePrograms(uid, loader);
            var id = CompOrNull<IdCardComponent>(pda.ContainedId);
            var state = new PdaUpdateState(
                programs,
                GetNetEntity(loader.ActiveProgram),
                pda.FlashlightOn,
                pda.PenSlot.HasItem,
                pda.PaiSlot.HasItem,
                new PdaIdInfoText
                {
                    ActualOwnerName = pda.OwnerName,
                    IdOwner = id?.FullName,
                    JobTitle = id?.LocalizedJobTitle,
                    StationAlertLevel = pda.StationAlertLevel,
                    StationAlertColor = pda.StationAlertColor,
                    StationAlertInstructions = pda.StationAlertInstructions, // WL-Changes: custom alert instructions in PDA
                    StationAlertName = pda.StationAlertName // WL-Changes: Alert Level Rework
                },
                pda.StationName,
                showUplink,
                hasInstrument,
                address,
                // WL-Changes-start: ETA in PDA
                expectedCountdownEnd, // сколько до прибытия эвака на станцию
                BeforeETA, // сколько до отбытия шаттла со станции
                RoundEnd); // закончился ли раунд - нужен для полного отключения видимости таймера в кпк
                // WL-Changes-end

            _ui.SetUiState(uid, PdaUiKey.Key, state);
        }

        private void OnPdaOpen(Entity<PdaComponent> ent, ref BoundUIOpenedEvent args)
        {
            if (!PdaUiKey.Key.Equals(args.UiKey))
                return;

            UpdatePdaUi(ent.Owner, ent.Comp);
        }

        private void OnUiMessage(EntityUid uid, PdaComponent pda, PdaRequestUpdateInterfaceMessage msg)
        {
            if (!PdaUiKey.Key.Equals(msg.UiKey))
                return;

            UpdatePdaUi(uid, pda);
        }

        private void OnUiMessage(EntityUid uid, PdaComponent pda, PdaToggleFlashlightMessage msg)
        {
            if (!PdaUiKey.Key.Equals(msg.UiKey))
                return;

            // TODO PREDICTION
            // When moving this to shared, fill in the user field
            _unpoweredFlashlight.TryToggleLight(uid, user: null);
        }

        private void OnUiMessage(EntityUid uid, PdaComponent pda, PdaShowRingtoneMessage msg)
        {
            if (!PdaUiKey.Key.Equals(msg.UiKey))
                return;

            if (HasComp<RingerComponent>(uid))
                _ringer.TryToggleRingerUi(uid, msg.Actor);
        }

        private void OnUiMessage(EntityUid uid, PdaComponent pda, PdaShowMusicMessage msg)
        {
            if (!PdaUiKey.Key.Equals(msg.UiKey))
                return;

            if (TryComp<InstrumentComponent>(uid, out var instrument))
                _instrument.ToggleInstrumentUi(uid, msg.Actor, instrument);
        }

        private void OnUiMessage(EntityUid uid, PdaComponent pda, PdaShowUplinkMessage msg)
        {
            if (!PdaUiKey.Key.Equals(msg.UiKey))
                return;

            // check if its locked again to prevent malicious clients opening locked uplinks
            if (TryGetUnlockedStore(uid, out var store))
            {
                if (store != uid)
                {
                    if (TryComp<RemoteStoreComponent>(uid, out var remoteStore))
                        remoteStore.Store = store;
                    _store.ToggleUi(msg.Actor, store.Value, remoteAccess: uid);
                }
                else
                {
                    _store.ToggleUi(msg.Actor, store.Value);
                }
            }
        }

        private void OnUiMessage(EntityUid uid, PdaComponent pda, PdaLockUplinkMessage msg)
        {
            if (!PdaUiKey.Key.Equals(msg.UiKey))
                return;

            if (TryComp<RingerUplinkComponent>(uid, out var uplink))
            {
                if (TryComp<RemoteStoreComponent>(uid, out var remoteStore))
                    remoteStore.Store = null;
                _ringer.LockUplink((uid, uplink));
                UpdatePdaUi(uid, pda);
            }
        }

        /// <summary>
        /// Returns the currently unlocked store, if there is one.
        /// </summary>
        private bool TryGetUnlockedStore(EntityUid uid, [NotNullWhen(true)] out EntityUid? store)
        {
            store = null;
            if (!TryComp<RingerUplinkComponent>(uid, out var uplink) || !uplink.Unlocked)
                return false;

            store = _store.GetStore(uid);
            return store != null;
        }

        private void UpdateStationName(EntityUid uid, PdaComponent pda)
        {
            var station = _station.GetOwningStation(uid);
            pda.StationName = station is null ? null : Name(station.Value);
        }

        private void UpdateAlertLevel(EntityUid uid, PdaComponent pda)
        {
            var station = _station.GetOwningStation(uid);
            if (!TryComp(station, out AlertLevelComponent? alertComp) ||
                alertComp.AlertLevels == null)
                return;
            pda.StationAlertLevel = alertComp.CurrentLevel;
            if (alertComp.AlertLevels.Levels.TryGetValue(alertComp.CurrentLevel, out var details))
            {
                // WL-Changes-start: Alert Level Rework
                if (_prototypeManager.TryIndex(details, out var index))
                {
                    pda.StationAlertColor = index.Color;
                    pda.StationAlertInstructions = index.Instruction;
                    if (!string.IsNullOrEmpty(index.SetName))
                        pda.StationAlertName = index.SetName;
                }
                // WL-Changes-end
            }
        }

        private string? GetDeviceNetAddress(EntityUid uid)
        {
            string? address = null;

            if (TryComp(uid, out DeviceNetworkComponent? deviceNetworkComponent))
            {
                address = deviceNetworkComponent?.Address;
            }

            return address;
        }
    }
}