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

namespace ProjectM.Authoring
{
    /// <summary>
    /// Authoring for the baked <see cref="ClutterFieldSpawner"/> singleton (mirrors ResourceFieldSpawnerAuthoring).
    /// Place once in the gameplay subscene and assign the Blight-clutter ghost prefab; ExpeditionFieldSystem
    /// scatters the clutter each expedition alongside the resource field. Carries no transform.
    /// </summary>
    public class ClutterFieldSpawnerAuthoring : MonoBehaviour
    {
        [Tooltip("Blight-clutter ghost prefab. Must carry BlightClutterAuthoring + a GhostAuthoringComponent (ownerless, interpolated).")]
        public GameObject ClutterPrefab;

        [Tooltip("Number of clutter pieces per expedition.")]
        [Min(1)] public int Count = 14;

        [Tooltip("Scatter radius (world units) around the expedition origin.")]
        [Min(1f)] public float Radius = 14f;

        private class ClutterFieldSpawnerBaker : Baker<ClutterFieldSpawnerAuthoring>
        {
            public override void Bake(ClutterFieldSpawnerAuthoring authoring)
            {
                var entity = GetEntity(authoring, TransformUsageFlags.None);
                AddComponent(entity, new ClutterFieldSpawner
                {
                    Prefab = authoring.ClutterPrefab != null
                        ? GetEntity(authoring.ClutterPrefab, TransformUsageFlags.Dynamic)
                        : Entity.Null,
                    Count = authoring.Count,
                    Radius = authoring.Radius,
                });
            }
        }
    }
}