using Unity.Collections;
using Unity.Entities;
using Unity.NetCode;

namespace ProjectM.Server
{
    /// <summary>
    /// Shared server-side RPC sender resolution: a request's <c>ReceiveRpcCommandRequest.SourceConnection</c> →
    /// its <see cref="NetworkId"/> → the conn→player map that every RPC-receive system builds (the
    /// AbilityUpgradeSystem / ReadyToggle idiom). The MAP BUILD stays per-caller — each system's player query
    /// carries different extra required components (InventorySlot / EquipmentSlot / StatModifier / BoonOffer /
    /// PlayerReady / …) — but the RESOLVE step is byte-for-byte identical across sites, so it lives here once.
    /// Burst-safe (plain <see cref="EntityManager"/> reads; called from <c>[BurstCompile]</c> receivers).
    /// </summary>
    public static class PlayerResolve
    {
        /// <summary>True (with <paramref name="player"/> set) iff <paramref name="conn"/> has a
        /// <see cref="NetworkId"/> present in <paramref name="map"/>. Behaviour-identical to the inline
        /// <c>HasComponent&lt;NetworkId&gt;(conn) &amp;&amp; map.TryGetValue(GetComponent&lt;NetworkId&gt;(conn).Value, out player)</c>.</summary>
        public static bool TryResolve(ref SystemState state, NativeHashMap<int, Entity> map, Entity conn, out Entity player)
        {
            player = Entity.Null;
            return state.EntityManager.HasComponent<NetworkId>(conn)
                && map.TryGetValue(state.EntityManager.GetComponentData<NetworkId>(conn).Value, out player);
        }
    }
}