using System.Linq;
using Content.Server.Administration.Logs;
using Content.Server.Atmos.Components;
using Content.Server.Atmos.Reactions;
using Content.Server.Fluids.EntitySystems;
using Content.Server.NodeContainer.EntitySystems;
using Content.Shared.Atmos;
using Content.Shared.Atmos.Components;
using Content.Shared.Atmos.EntitySystems;
using Content.Shared.Damage.Systems;
using Content.Shared.Decals;
using Content.Shared.Doors.Components;
using Content.Shared.Maps;
using JetBrains.Annotations;
using Robust.Server.GameObjects;
using Robust.Shared.Audio.Systems;
using Robust.Shared.Containers;
using Robust.Shared.Map;
using Robust.Shared.Physics.Systems;
using Robust.Shared.Prototypes;
using Robust.Shared.Threading;

namespace Content.Server.Atmos.EntitySystems;

/// <summary>
///     This is our SSAir equivalent, if you need to interact with or query atmos in any way, go through this.
/// </summary>
[UsedImplicitly]
public sealed partial class AtmosphereSystem : SharedAtmosphereSystem
{
    [Dependency] private ITileDefinitionManager _tileDefinitionManager = default!;
    [Dependency] private IAdminLogManager _adminLog = default!;
    [Dependency] private IParallelManager _parallel = default!;
    [Dependency] private EntityLookupSystem _lookup = default!;
    [Dependency] private SharedContainerSystem _containers = default!;
    [Dependency] private SharedPhysicsSystem _physics = default!;
    [Dependency] private GasTileOverlaySystem _gasTileOverlaySystem = default!;
    [Dependency] private SharedAudioSystem _audio = default!;
    [Dependency] private SharedMapSystem _mapSystem = default!;
    [Dependency] private TileSystem _tile = default!;
    [Dependency] private MapSystem _map = default!;
    [Dependency] public PuddleSystem Puddle = default!;
    [Dependency] private DamageableSystem _damage = default!;

    [Dependency] private EntityQuery<GridAtmosphereComponent> _gridAtmosQuery = default!;
    [Dependency] private EntityQuery<MapAtmosphereComponent> _mapAtmosQuery = default!;
    [Dependency] private EntityQuery<AirtightComponent> _airtightQuery = default!;
    [Dependency] private EntityQuery<FirelockComponent> _firelockQuery = default!;

    private const float ExposedUpdateDelay = 1f;

    private HashSet<EntityUid> _entSet = new();

    private string[] _burntDecals = [];

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

        UpdatesAfter.Add(typeof(NodeGroupSystem));

        InitializeGases();
        InitializeCommands();
        InitializeCVars();
        InitializeGridAtmosphere();
        InitializeMap();

        SubscribeLocalEvent<TileChangedEvent>(OnTileChanged);
        SubscribeLocalEvent<PrototypesReloadedEventArgs>(OnPrototypesReloaded);

        CacheDecals();
        CacheGases();
    }

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

        ShutdownCommands();
    }

    private void OnTileChanged(ref TileChangedEvent ev)
    {
        foreach (var change in ev.Changes)
        {
            InvalidateTile(ev.Entity.Owner, change.GridIndices);
        }
    }

    private void OnPrototypesReloaded(PrototypesReloadedEventArgs ev)
    {
        if (ev.WasModified<DecalPrototype>())
            CacheDecals();
        if (ev.WasModified<GasReactionPrototype>())
            CacheGases();
    }

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

        UpdateProcessing(frameTime);
        UpdateHighPressure(frameTime);

        var delay = TimeSpan.FromSeconds(ExposedUpdateDelay);

        var query = EntityQueryEnumerator<AtmosExposedComponent, TransformComponent>();
        while (query.MoveNext(out var uid, out var exposed, out var transform))
        {
            if (exposed.LastExposure + delay > _gameTiming.CurTime)
                continue;

            var air = GetContainingMixture((uid, transform));

            if (air == null)
                continue;

            var updateEvent = new AtmosExposedUpdateEvent(transform.Coordinates, air, transform, ExposedUpdateDelay, exposed.ExposedArea);
            RaiseLocalEvent(uid, ref updateEvent);
            exposed.LastExposure = _gameTiming.CurTime;
        }
    }

    private void CacheDecals()
    {
        _burntDecals = ProtoMan.EnumeratePrototypes<DecalPrototype>().Where(x => x.Tags.Contains("burnt")).Select(x => x.ID).ToArray();
    }
}