using Content.Shared.Actions;
using Content.Shared.Hands.EntitySystems;
using Content.Shared.Interaction.Components;
using Content.Shared.Popups;
using Robust.Shared.Audio.Systems;
using Robust.Shared.Containers;

namespace Content.Shared.RetractableItemAction;

/// <summary>
/// System for handling retractable items, such as armblades.
/// </summary>
public sealed class RetractableItemActionSystem : EntitySystem
{
    [Dependency] private readonly SharedHandsSystem _hands = default!;
    [Dependency] private readonly SharedContainerSystem _containers = default!;
    [Dependency] private readonly SharedAudioSystem _audio = default!;
    [Dependency] private readonly SharedActionsSystem _actions = default!;
    [Dependency] private readonly SharedPopupSystem _popups = default!;

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

        SubscribeLocalEvent<RetractableItemActionComponent, MapInitEvent>(OnActionInit);
        SubscribeLocalEvent<RetractableItemActionComponent, OnRetractableItemActionEvent>(OnRetractableItemAction);

        SubscribeLocalEvent<ActionRetractableItemComponent, ComponentShutdown>(OnActionSummonedShutdown);
    }

    private void OnActionInit(Entity<RetractableItemActionComponent> ent, ref MapInitEvent args)
    {
        _containers.EnsureContainer<Container>(ent, RetractableItemActionComponent.ContainerId);

        PopulateActionItem(ent.Owner);
    }

    private void OnRetractableItemAction(Entity<RetractableItemActionComponent> ent, ref OnRetractableItemActionEvent args)
    {
        if (_hands.GetActiveHand(args.Performer) is not { } userHand)
            return;

        if (_actions.GetAction(ent.Owner) is not { } action)
            return;

        if (action.Comp.AttachedEntity == null)
            return;

        if (ent.Comp.ActionItemUid == null)
            return;

        // Don't allow to summon an item if holding an unremoveable item unless that item is summoned by the action.
        if (userHand.HeldEntity != null && !_hands.IsHolding(args.Performer, ent.Comp.ActionItemUid) && !_hands.CanDropHeld(args.Performer, userHand, false))
        {
            _popups.PopupClient(Loc.GetString("retractable-item-hand-cannot-drop"), args.Performer, args.Performer);
            return;
        }

        if (_hands.IsHolding(args.Performer, ent.Comp.ActionItemUid))
        {
            RemComp<UnremoveableComponent>(ent.Comp.ActionItemUid.Value);
            var container = _containers.GetContainer(ent, RetractableItemActionComponent.ContainerId);
            _containers.Insert(ent.Comp.ActionItemUid.Value, container);
            _audio.PlayPredicted(ent.Comp.RetractSounds, action.Comp.AttachedEntity.Value, action.Comp.AttachedEntity.Value);
        }
        else
        {
            _hands.TryForcePickup(args.Performer, ent.Comp.ActionItemUid.Value, userHand, checkActionBlocker: false);
            _audio.PlayPredicted(ent.Comp.SummonSounds, action.Comp.AttachedEntity.Value, action.Comp.AttachedEntity.Value);
            EnsureComp<UnremoveableComponent>(ent.Comp.ActionItemUid.Value);
        }

        args.Handled = true;
    }

    private void OnActionSummonedShutdown(Entity<ActionRetractableItemComponent> ent, ref ComponentShutdown args)
    {
        if (_actions.GetAction(ent.Comp.SummoningAction) is not { } action)
            return;

        if (!TryComp<RetractableItemActionComponent>(action, out var retract) || retract.ActionItemUid != ent.Owner)
            return;

        // If the item is somehow destroyed, re-add it to the action.
        PopulateActionItem(action.Owner);
    }

    private void PopulateActionItem(Entity<RetractableItemActionComponent?> ent)
    {
        if (!Resolve(ent.Owner, ref ent.Comp, false) || TerminatingOrDeleted(ent))
            return;

        if (!PredictedTrySpawnInContainer(ent.Comp.SpawnedPrototype, ent.Owner, RetractableItemActionComponent.ContainerId, out var summoned))
            return;

        ent.Comp.ActionItemUid = summoned.Value;

        // Mark the unremovable item so it can be added back into the action.
        var summonedComp = AddComp<ActionRetractableItemComponent>(summoned.Value);
        summonedComp.SummoningAction = ent.Owner;
        Dirty(summoned.Value, summonedComp);

        Dirty(ent);
    }
}