using AcDream.Runtime.Entities;
using AcDream.Runtime.Gameplay;
using AcDream.Runtime.Physics;

namespace AcDream.Runtime;

/// <summary>
/// One allocation-free terminal ownership ledger for the complete J5
/// presentation-independent simulation graph. It owns no mutable state.
/// Graphical and no-window hosts inspect the same canonical owners.
/// </summary>
public readonly record struct RuntimeSimulationOwnershipSnapshot(
    RuntimeEntityObjectOwnershipSnapshot EntityObjects,
    RuntimePhysicsOwnershipSnapshot Physics,
    RuntimeGameplayOwnershipSnapshot Gameplay)
{
    public bool IsConverged =>
        EntityObjects.IsConverged
        && Physics.IsConverged
        && Gameplay.IsConverged;
}

public static class RuntimeSimulationOwnership
{
    public static RuntimeSimulationOwnershipSnapshot Capture(
        RuntimeEntityObjectLifetime entityObjects,
        RuntimeInventoryState inventory,
        RuntimeCharacterState character,
        RuntimeCommunicationState communication,
        RuntimeActionState actions,
        RuntimeLocalPlayerMovementState movement)
    {
        ArgumentNullException.ThrowIfNull(entityObjects);
        return new RuntimeSimulationOwnershipSnapshot(
            entityObjects.CaptureOwnership(),
            entityObjects.Physics.CaptureOwnership(),
            RuntimeGameplayOwnership.Capture(
                inventory,
                character,
                communication,
                actions,
                movement));
    }
}