using System.Collections.Generic;
using UnityEngine;
using NanoBrain;

namespace CreatureControl {

    public class Mouth : MonoBehaviour {
        public GameObject foodPrefab;
        public Brain nanoBrain;

        public Neuron havingFood;
        public Nucleus enableFoodPheromones;

        void Awake() {
            this.nanoBrain = GetComponentInParent<Brain>();
            if (this.nanoBrain == null || this.nanoBrain.brain == null)
                return;

            if (nanoBrain.brain.GetNucleus("Mouth") is Neuron mouthNeuron)
                mouthNeuron.WhenFiring += CheckGrab;
            this.havingFood = nanoBrain.brain.GetNeuron("Having Food");
        }

        void Start() {
            havingFood?.SetBias(Vector3.zero);
        }

        protected void CheckGrab() {
            if (havingFood == null)
                return;

            Collider[] colliders = Physics.OverlapSphere(this.transform.position, 0.04f);
            foreach (Collider c in colliders) {
                if (havingFood.outputValue.x > 0) {
                    AntsNest nest = c.GetComponentInParent<AntsNest>();
                    if (nest != null)
                        LetGo();
                }
                else {
                    Food food = c.GetComponentInParent<Food>();
                    if (food != null)
                        Grab();
                }
            }
        }

        public bool Grab() {
            Debug.Log($"{this.transform.parent.name} Grab food");
            havingFood?.SetBias(Vector3.one);
            GameObject food = Instantiate(foodPrefab);

            food.transform.SetParent(this.transform, false);
            food.transform.localPosition = Vector3.zero;
            return true;
        }

        public void LetGo() {
            Debug.Log($"{this.transform.parent.name} Release food");

            List<GameObject> toDelete = new();
            for (int i = 0; i < transform.childCount; i++)
                toDelete.Add(transform.GetChild(i).gameObject);
            foreach (GameObject go in toDelete)
                Destroy(go);
            
            havingFood?.SetBias(Vector3.zero);
        }
    }

}