using System.Collections.Generic;
using UnityEngine;

namespace NanoBrain.Unity {

    /// <summary>
    /// The Unity ScriptableObject to implement re-usable Cluster Prefabs
    /// </summary>
    [CreateAssetMenu(menuName = "Passer/Cluster")]
    public class ClusterPrefab : ScriptableObject {

        /// <summary>
        /// The cluster data
        /// </summary>
        public Cluster cluster;

        /// <summary>
        /// Retrieve a nucleus in this cluster
        /// </summary>
        /// <param name="nucleusName">The name of the nucleus</param>
        /// <returns>The Nucleus with the given name or null if no such Nucleus could be found</returns>
        public Nucleus GetNucleus(string nucleusName) {
            return cluster.GetNucleus(nucleusName);
        }

        /// <summary>
        /// Call this function to ensure that there is at least one nucleus
        /// </summary>
        /// his is an invariant and should be ensured before the nucleus is used
        /// because output requires it.
        public void EnsureInitialization() {
            this.cluster.prefab = this;
            this.cluster.name = this.name;
            this.cluster.nuclei ??= new List<Nucleus>();
            if (this.cluster.nuclei.Count <= 0)
                new Neuron(this.cluster, "Output"); // Every cluster should have at least 1 neuron
            this.cluster.instanceCount = 1;
        }
    }

}