using UnityEngine;
using System.Collections;

public class EnemyShooter : MonoBehaviour {

    public GameObject bullet;
    public float FireRate;
    public float CollisionRadius;

    private float nextFire;

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {

        if (CanFire())
        {
            Fire();
        }
    }

    private bool CanFire()
    {
        return (Time.time > nextFire) && (HasCollidedOnPlayer()) && (PlayerIsVisible());
    }

    private bool HasCollidedOnPlayer()
    {
        Collider2D[] colliders = Physics2D.OverlapCircleAll(transform.position, CollisionRadius);

        foreach (Collider2D collider in colliders)
        {
            if (collider.tag.Equals("Player"))
            {
                return true;
            }
        }

        return false;
    }

    private void Fire()
    {
        Instantiate(bullet, transform.position, transform.rotation);
        nextFire = Time.time + FireRate;
    }

    private bool PlayerIsVisible()
    {
        GameObject player = GameObject.FindGameObjectWithTag("Player");
        return !player.GetComponent<InvisibilitySkill>().IsExecuting();
    }

}