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

/// <summary>
/// Agent behaviour class
/// Author: Thomas Elliot Jones
/// </summary>

public class FoodBehaviour : MonoBehaviour {

    public AgentBehaviour agent;

    public bool foodLeft;

    private float amount;
    private float decrement;
    private int rand;

    private Vector3 randScale;

    /*
     * If scale is 1, y = 0.1
     * If scale is 2, y = 0.5
     * If scale is 3, y = 1
     * If scale is 4, y = 1.5
     * If scale is 5, y = 2.
     */

    // Use this for initialization
    void Start () {
        foodLeft = true;
        decrement = 0.25f;

        //rand = Random.Range(1, 5);
        //Randomly assign a scale to the food blocks.
        //randScale = new Vector3(rand, rand, rand);
        //this.transform.localScale = randScale;

        // Set the amount to match its scale.
        amount = this.transform.localScale.x * this.transform.localScale.y * this.transform.localScale.z;
    }

    // Update is called once per frame
    void Update () {
        if (amount <= 0f)
        {
            foodLeft = false;
            this.gameObject.GetComponent<MeshRenderer>().enabled = false;
            this.transform.localScale = new Vector3(1f, 1f, 1f);
            //this.transform.GetComponent<SphereCollider>().radius = 3;
        }
    }

    void OnTriggerEnter(Collider other)
    {
        // Check if the object is an ant.
        if (other.gameObject.tag == "Agent")
        {
            if (this.foodLeft && (!other.gameObject.GetComponent<AgentBehaviour>().transportingFood))
            {
                amount = amount - decrement;
                // If the agent is not carrying food and has food left, decrement the amount
                // and its size accordingly.
                Vector3 newSize = new Vector3(Mathf.Pow(amount, 1f / 1.5f), Mathf.Pow(amount, 1f / 1.5f), Mathf.Pow(amount, 1f / 1.5f));
                this.transform.localScale = newSize;
                this.transform.position = new Vector3(this.transform.position.x, this.transform.localScale.y / 4.5f, this.transform.position.z);
            }
        }
    }
}