using System.Collections.Generic;
using ProjectM.Simulation;
using Unity.Entities;
using UnityEngine;

namespace ProjectM.Authoring
{
    /// <summary>
    /// Bakes the Enemy-test GYM singletons: the <see cref="GymTag"/> mode switch + the <see cref="GymEnemyRoster"/>
    /// buffer of on-demand-spawnable enemy prefabs (Drowner / Grindylow — the ready skinned prefabs). Place ONE in
    /// the gym subscene. Each prefab must be a baked ghost (interpolated ownerless enemy, EnemyAuthoring-based). The
    /// SpawnEnemy dev op instantiates the row whose Kind matches the request.
    /// </summary>
    public class GymRosterAuthoring : MonoBehaviour
    {
        [System.Serializable]
        public struct Entry
        {
            [Tooltip("Stable kind id (0 = Drowner, 1 = Grindylow).")]
            public byte Kind;
            public GameObject Prefab;
        }

        [Tooltip("On-demand-spawnable enemy prefabs, one row per kind.")]
        public List<Entry> Enemies = new List<Entry>();

        private class RosterBaker : Baker<GymRosterAuthoring>
        {
            public override void Bake(GymRosterAuthoring authoring)
            {
                var entity = GetEntity(TransformUsageFlags.None);
                AddComponent<GymTag>(entity);
                var buf = AddBuffer<GymEnemyRoster>(entity);
                if (authoring.Enemies != null)
                {
                    foreach (var e in authoring.Enemies)
                    {
                        if (e.Prefab == null) continue;
                        buf.Add(new GymEnemyRoster
                        {
                            Kind = e.Kind,
                            Prefab = GetEntity(e.Prefab, TransformUsageFlags.Dynamic),
                        });
                    }
                }
            }
        }
    }
}