using Unity.Entities;

namespace ProjectM.Simulation
{
    /// <summary>
    /// Baked singleton holding the resource-node ghost prefab + field shape. RoomFieldSystem reads it to
    /// scatter <see cref="Count"/> nodes within <see cref="Radius"/> of the expedition region origin on each
    /// Expedition phase entry (seeded by the cycle number). Mirrors <see cref="StorageSpawner"/>.
    /// </summary>
    public struct ResourceFieldSpawner : IComponentData
    {
        /// <summary>Baked resource-node ghost prefab to instantiate.</summary>
        public Entity Prefab;

        /// <summary>Number of nodes to scatter per expedition.</summary>
        public int Count;

        /// <summary>Scatter radius (world units) around the expedition region origin.</summary>
        public float Radius;
    }

    /// <summary>
    /// Server-only bookkeeping for <see cref="ProjectM.Server.RoomFieldSystem"/>, attached at runtime beside the
    /// baked spawner singleton (the BaseFieldRuntime idiom): the <c>RunRuntime.RoomEpoch</c> this system last seeded,
    /// int-equality-compared so each room's field scatters exactly once. NOT replicated; session-scoped.
    /// </summary>
    public struct RoomFieldState : IComponentData
    {
        public int LastSpawnedRoomEpoch;
    }
}