space-game/apps/backend/Simulation/RuntimeModels.cs

using SpaceGame.Simulation.Api.Data;

namespace SpaceGame.Simulation.Api.Simulation;

public sealed class SimulationWorld
{
  public required string Label { get; init; }
  public required int Seed { get; init; }
  public required BalanceDefinition Balance { get; init; }
  public required List<SystemRuntime> Systems { get; init; }
  public required List<ResourceNodeRuntime> Nodes { get; init; }
  public required List<StationRuntime> Stations { get; init; }
  public required List<ShipRuntime> Ships { get; init; }
  public required List<FactionRuntime> Factions { get; init; }
  public required Dictionary<string, ShipDefinition> ShipDefinitions { get; init; }
  public int TickIntervalMs { get; init; } = 200;
  public DateTimeOffset GeneratedAtUtc { get; set; }
}

public sealed class SystemRuntime
{
  public required SolarSystemDefinition Definition { get; init; }
  public required Vector3 Position { get; init; }
}

public sealed class ResourceNodeRuntime
{
  public required string Id { get; init; }
  public required string SystemId { get; init; }
  public required Vector3 Position { get; init; }
  public required string ItemId { get; init; }
  public float OreRemaining { get; set; }
  public float MaxOre { get; init; }
  public string LastDeltaSignature { get; set; } = string.Empty;
}

public sealed class StationRuntime
{
  public required string Id { get; init; }
  public required string SystemId { get; init; }
  public required ConstructibleDefinition Definition { get; init; }
  public required Vector3 Position { get; init; }
  public required string FactionId { get; init; }
  public float OreStored { get; set; }
  public float RefinedStock { get; set; }
  public float ProcessTimer { get; set; }
  public HashSet<string> DockedShipIds { get; } = [];
  public string LastDeltaSignature { get; set; } = string.Empty;
}

public sealed class ShipRuntime
{
  public required string Id { get; init; }
  public required string SystemId { get; set; }
  public required ShipDefinition Definition { get; init; }
  public required string FactionId { get; init; }
  public required Vector3 Position { get; set; }
  public required Vector3 TargetPosition { get; set; }
  public Vector3 Velocity { get; set; } = Vector3.Zero;
  public string State { get; set; } = "idle";
  public ShipOrderRuntime? Order { get; set; }
  public required DefaultBehaviorRuntime DefaultBehavior { get; set; }
  public required ControllerTaskRuntime ControllerTask { get; set; }
  public float ActionTimer { get; set; }
  public float Cargo { get; set; }
  public string? DockedStationId { get; set; }
  public float Health { get; set; }
  public List<string> History { get; } = [];
  public string LastSignature { get; set; } = string.Empty;
  public string LastDeltaSignature { get; set; } = string.Empty;
}

public sealed class FactionRuntime
{
  public required string Id { get; init; }
  public required string Label { get; init; }
  public required string Color { get; init; }
  public float Credits { get; set; }
  public float OreMined { get; set; }
  public float GoodsProduced { get; set; }
  public int ShipsBuilt { get; set; }
  public int ShipsLost { get; set; }
  public string LastDeltaSignature { get; set; } = string.Empty;
}

public sealed class ShipOrderRuntime
{
  public required string Kind { get; init; }
  public string Status { get; set; } = "accepted";
  public required string DestinationSystemId { get; init; }
  public required Vector3 DestinationPosition { get; init; }
}

public sealed class DefaultBehaviorRuntime
{
  public required string Kind { get; set; }
  public string? AreaSystemId { get; set; }
  public string? RefineryId { get; set; }
  public string? NodeId { get; set; }
  public string? Phase { get; set; }
  public List<Vector3> PatrolPoints { get; set; } = [];
  public int PatrolIndex { get; set; }
}

public sealed class ControllerTaskRuntime
{
  public required string Kind { get; set; }
  public string? TargetEntityId { get; set; }
  public string? TargetSystemId { get; set; }
  public Vector3? TargetPosition { get; set; }
  public float Threshold { get; set; }
}

public readonly record struct Vector3(float X, float Y, float Z)
{
  public static Vector3 Zero => new(0f, 0f, 0f);

  public float DistanceTo(Vector3 other)
  {
    var dx = X - other.X;
    var dy = Y - other.Y;
    var dz = Z - other.Z;
    return MathF.Sqrt((dx * dx) + (dy * dy) + (dz * dz));
  }

  public Vector3 MoveToward(Vector3 target, float maxDistance)
  {
    var distance = DistanceTo(target);
    if (distance <= maxDistance || distance <= 0.0001f)
    {
      return target;
    }

    var t = maxDistance / distance;
    return new Vector3(
      X + ((target.X - X) * t),
      Y + ((target.Y - Y) * t),
      Z + ((target.Z - Z) * t));
  }

  public Vector3 Subtract(Vector3 other) => new(X - other.X, Y - other.Y, Z - other.Z);

  public Vector3 Divide(float value)
  {
    if (value == 0f)
    {
      return Zero;
    }

    return new(X / value, Y / value, Z / value);
  }
}