using System.Numerics;
using AcDream.App.Input;
using AcDream.App.Interaction;
using AcDream.App.Rendering;
using AcDream.App.Rendering.Vfx;
using AcDream.App.World;
using AcDream.Core.Physics;
using AcDream.Core.Rendering;
using AcDream.Core.Vfx;
using AcDream.Core.World;
using AcDream.UI.Abstractions.Panels.Settings;

namespace AcDream.App.Update;

internal interface ILiveObjectFramePhase
{
    void Tick(float deltaSeconds);
}

internal interface ILiveSessionFramePhase
{
    void Tick();
}

internal interface IPostNetworkCommandFramePhase
{
    void RunPostNetworkCommandPhase();
}

internal interface ILiveSpatialReconcilePhase
{
    void Reconcile();
}

internal interface IParticleRangeSource
{
    float RangeMultiplier { get; }
}

internal sealed class SettingsParticleRangeSource : IParticleRangeSource
{
    private readonly SettingsVM? _settings;
    private readonly ParticleRange _fallback;

    public SettingsParticleRangeSource(SettingsVM? settings, ParticleRange fallback)
    {
        _settings = settings;
        _fallback = fallback;
    }

    public float RangeMultiplier =>
        (_settings?.DisplayDraft.ParticleRange ?? _fallback) == ParticleRange.Extended
            ? ParticleVisibilityController.ExtendedRangeMultiplier
            : 1f;
}

/// <summary>
/// Owns the shared effect-manager tail that follows ordinary and static
/// object worksets in acdream's registered TS-50/TS-51 adaptation.
/// </summary>
internal sealed class LiveEffectFrameController
{
    private readonly TranslucencyFadeManager _translucencyFades;
    private readonly AnimationHookFrameQueue _animationHooks;
    private readonly EntityEffectController _entityEffects;
    private readonly ParticleHookSink _particleSink;
    private readonly LiveEntityLightController _lights;
    private readonly ParticleVisibilityController _particleVisibility;
    private readonly ParticleSystem _particles;
    private readonly PhysicsScriptRunner _scripts;
    private readonly IPhysicsScriptTimeSource _scriptTime;
    private readonly IParticleRangeSource _particleRange;

    public LiveEffectFrameController(
        TranslucencyFadeManager translucencyFades,
        AnimationHookFrameQueue animationHooks,
        EntityEffectController entityEffects,
        ParticleHookSink particleSink,
        LiveEntityLightController lights,
        ParticleVisibilityController particleVisibility,
        ParticleSystem particles,
        PhysicsScriptRunner scripts,
        IPhysicsScriptTimeSource scriptTime,
        IParticleRangeSource particleRange)
    {
        _translucencyFades = translucencyFades
            ?? throw new ArgumentNullException(nameof(translucencyFades));
        _animationHooks = animationHooks ?? throw new ArgumentNullException(nameof(animationHooks));
        _entityEffects = entityEffects ?? throw new ArgumentNullException(nameof(entityEffects));
        _particleSink = particleSink ?? throw new ArgumentNullException(nameof(particleSink));
        _lights = lights ?? throw new ArgumentNullException(nameof(lights));
        _particleVisibility = particleVisibility
            ?? throw new ArgumentNullException(nameof(particleVisibility));
        _particles = particles ?? throw new ArgumentNullException(nameof(particles));
        _scripts = scripts ?? throw new ArgumentNullException(nameof(scripts));
        _scriptTime = scriptTime ?? throw new ArgumentNullException(nameof(scriptTime));
        _particleRange = particleRange ?? throw new ArgumentNullException(nameof(particleRange));
    }

    public void Tick(float deltaSeconds)
    {
        // Retail's ordinary-object UpdatePositionInternal @ 0x00512C30 calls
        // CPhysicsObj::process_hooks @ 0x00511550 before its manager tail.
        // acdream currently keeps non-AnimationDone hooks at this deferred
        // shared boundary under TS-50; this extraction must not silently
        // claim that adaptation is gone.
        _translucencyFades.AdvanceAll(deltaSeconds);
        _animationHooks.Drain();
        _entityEffects.RefreshLiveOwnerPoses();
        _particleSink.RefreshAttachedEmitters();
        _lights.Refresh();
        _particleVisibility.Apply(_particles, _particleRange.RangeMultiplier);

        // Retail CPhysicsObj::UpdateObjectInternal @ 0x005156B0 advances the
        // ordinary-object Particle manager before Script. acdream's shared
        // once-per-host tail and its static-order difference remain TS-51.
        _particles.Tick(deltaSeconds);
        _scripts.Tick(_scriptTime.CurrentScriptTime);
    }
}

/// <summary>
/// Owns the complete pre-network local/ordinary/static live-object phase.
/// </summary>
internal sealed class LiveObjectFrameController : ILiveObjectFramePhase
{
    private readonly RetailInboundEventDispatcher _inboundEvents;
    private readonly RetailLocalPlayerFrameController _localPlayerFrame;
    private readonly SelectionInteractionController? _selectionInteractions;
    private readonly LiveEntityRuntime _liveEntities;
    private readonly ILocalPlayerIdentitySource _localPlayer;
    private readonly LiveWorldOriginState _origin;
    private readonly LiveEntityAnimationScheduler _animations;
    private readonly RetailStaticAnimatingObjectScheduler _staticAnimations;
    private readonly LiveEntityAnimationPresenter _animationPresenter;
    private readonly LiveEntityAnimationRuntimeView<LiveEntityAnimationState>
        _animatedEntities;
    private readonly EquippedChildRenderController _equippedChildren;
    private readonly LiveEffectFrameController _effects;

    public LiveObjectFrameController(
        RetailInboundEventDispatcher inboundEvents,
        RetailLocalPlayerFrameController localPlayerFrame,
        SelectionInteractionController? selectionInteractions,
        LiveEntityRuntime liveEntities,
        ILocalPlayerIdentitySource localPlayer,
        LiveWorldOriginState origin,
        LiveEntityAnimationScheduler animations,
        RetailStaticAnimatingObjectScheduler staticAnimations,
        LiveEntityAnimationPresenter animationPresenter,
        LiveEntityAnimationRuntimeView<LiveEntityAnimationState> animatedEntities,
        EquippedChildRenderController equippedChildren,
        LiveEffectFrameController effects)
    {
        _inboundEvents = inboundEvents ?? throw new ArgumentNullException(nameof(inboundEvents));
        _localPlayerFrame = localPlayerFrame
            ?? throw new ArgumentNullException(nameof(localPlayerFrame));
        _selectionInteractions = selectionInteractions;
        _liveEntities = liveEntities ?? throw new ArgumentNullException(nameof(liveEntities));
        _localPlayer = localPlayer ?? throw new ArgumentNullException(nameof(localPlayer));
        _origin = origin ?? throw new ArgumentNullException(nameof(origin));
        _animations = animations ?? throw new ArgumentNullException(nameof(animations));
        _staticAnimations = staticAnimations
            ?? throw new ArgumentNullException(nameof(staticAnimations));
        _animationPresenter = animationPresenter
            ?? throw new ArgumentNullException(nameof(animationPresenter));
        _animatedEntities = animatedEntities
            ?? throw new ArgumentNullException(nameof(animatedEntities));
        _equippedChildren = equippedChildren
            ?? throw new ArgumentNullException(nameof(equippedChildren));
        _effects = effects ?? throw new ArgumentNullException(nameof(effects));
    }

    public void Tick(float deltaSeconds) =>
        _inboundEvents.Run(
            this,
            deltaSeconds,
            static (controller, elapsed) => controller.TickCore(elapsed));

    private void TickCore(float deltaSeconds)
    {
        _localPlayerFrame.AdvanceBeforeNetwork(deltaSeconds);
        _selectionInteractions?.DrainOutbound();

        Vector3? playerPosition =
            _liveEntities.MaterializedWorldEntities.TryGetValue(
                _localPlayer.ServerGuid,
                out WorldEntity? player)
                ? player.Position
                : null;
        IReadOnlyDictionary<uint, LiveEntityAnimationSchedule> schedules =
            _animations.Tick(
                deltaSeconds,
                playerPosition,
                _localPlayerFrame.HiddenPartPoseDirty,
                _origin.CenterX,
                _origin.CenterY,
                _animationPresenter.PrepareAnimation);

        // CPhysics::UseTime @ 0x00509950 walks ordinary objects before the
        // distinct static_animating_objects workset.
        _staticAnimations.Tick(deltaSeconds);
        if (_animatedEntities.Count > 0)
            _animationPresenter.Present(schedules);
        _equippedChildren.Tick();
        // Retail CPhysicsObj::animate_static_object @ 0x00513DF0 runs
        // Script -> Particle -> process_hooks. acdream intentionally retains
        // the TS-51 static-order difference here: ProcessHooks precedes the
        // shared once-per-host Particle -> Script tail below.
        _staticAnimations.ProcessHooks();
        _effects.Tick(deltaSeconds);
    }
}

/// <summary>
/// Re-composes spatial derivatives after authoritative root mutations without
/// advancing animation, physics, effects, particles, scripts, or fades.
/// </summary>
internal sealed class LiveSpatialPresentationReconciler : ILiveSpatialReconcilePhase
{
    private readonly EntityEffectController _entityEffects;
    private readonly EquippedChildRenderController _equippedChildren;
    private readonly ParticleHookSink _particleSink;
    private readonly LiveEntityLightController _lights;

    public LiveSpatialPresentationReconciler(
        EntityEffectController entityEffects,
        EquippedChildRenderController equippedChildren,
        ParticleHookSink particleSink,
        LiveEntityLightController lights)
    {
        _entityEffects = entityEffects ?? throw new ArgumentNullException(nameof(entityEffects));
        _equippedChildren = equippedChildren
            ?? throw new ArgumentNullException(nameof(equippedChildren));
        _particleSink = particleSink ?? throw new ArgumentNullException(nameof(particleSink));
        _lights = lights ?? throw new ArgumentNullException(nameof(lights));
    }

    public void Reconcile()
    {
        _entityEffects.RefreshLiveOwnerPoses();
        _equippedChildren.Tick();
        _particleSink.RefreshAttachedEmitters();
        _lights.Refresh();
    }
}