using ProjectM.Simulation;
using Unity.Entities;
using UnityEngine;

namespace ProjectM.Authoring
{
    /// <summary>
    /// Authoring placed once in the gameplay subscene. Bakes a <see cref="PlayerSpawner"/> singleton
    /// holding the player ghost prefab entity and a spawn point, which the server's
    /// GoInGameServerSystem instantiates on each connect.
    /// </summary>
    public class PlayerSpawnerAuthoring : MonoBehaviour
    {
        [Tooltip("The Player ghost prefab to spawn for each connected client.")]
        public GameObject PlayerPrefab;

        public Vector3 SpawnPoint = Vector3.zero;

        [Tooltip("Radius (m) of the co-op spawn ring; players land on distinct slots so they don't stack.")]
        public float SpawnRingRadius = 2.5f;

        [Tooltip("Evenly-spaced ring positions before players spill onto an outer ring.")]
        public int RingSlots = 4;

        private class PlayerSpawnerBaker : Baker<PlayerSpawnerAuthoring>
        {
            public override void Bake(PlayerSpawnerAuthoring authoring)
            {
                // The spawner itself needs no transform; it is a data singleton.
                var entity = GetEntity(authoring, TransformUsageFlags.None);

                AddComponent(entity, new PlayerSpawner
                {
                    PlayerPrefab = GetEntity(authoring.PlayerPrefab, TransformUsageFlags.Dynamic),
                    SpawnPoint = authoring.SpawnPoint,
                    SpawnRingRadius = authoring.SpawnRingRadius,
                    RingSlots = authoring.RingSlots
                });
            }
        }
    }
}