using System;
using UnityEngine;

/// <summary>
/// The Nanobrain namespace
/// </summary>
namespace NanoBrain {

    /// <summary>
    /// A Nucleus is a basic element in a brain cluster
    /// </summary>
    [Serializable]
    public abstract class Nucleus {
        /// <summary>
        /// The name of the Nucleus
        /// </summary>
        [HideInInspector]
        public string name;

        /// <summary>
        /// The cluster instance in which the nucleus is located
        /// </summary>
        [SerializeReference]
        //[HideInInspector]
        public Cluster parent;

        /// <summary>
        /// Function to make a partial clone of this nucleus
        /// </summary>
        /// <param name="parent">The cluster in which the cloned nucleus should be placed</param>
        /// <returns></returns>
        public abstract Nucleus ShallowCloneTo(Cluster parent);

        /// <summary>
        /// The types of Nucleus
        /// </summary>
        public enum Type {
            None,
            Neuron,
            MemoryCell,
            Cluster,
        }

        #region Update

        /// <summary>
        /// Update the state without updating other Nuclei
        /// </summary>
        public abstract void UpdateStateIsolated();

        #endregion Update

        public static bool EqualStructure(Nucleus nucleus1, Nucleus nucleus2) {
            if (nucleus1.parent != null && nucleus2.parent != null) {
                if (nucleus1.parent.baseName != nucleus2.parent.baseName)
                    return false;
            } else {
                // mainly to check one is null, other is not.
                if (nucleus1.parent != nucleus2.parent)
                    return false;
            }

            if (nucleus1 is Neuron neuron1) {
                if (nucleus2 is not Neuron neuron2)
                    return false;
                if (neuron1.name != neuron2.name)
                    return false;
                return Neuron.EqualStructure(neuron1, neuron2);
            }
            else if (nucleus1 is Cluster cluster1) {
                if (nucleus2 is not Cluster cluster2)
                    return false;
                if (cluster1.baseName != cluster2.baseName)
                    return false;
                return Cluster.EqualStructure(cluster1, cluster2);
            }

            return false;
        }
    }

}