using UnityEngine;
using System.Collections;
using System;

public class Surv_cont : MonoBehaviour
{
    public float speed = 15.0f;
    public float padding = 1f;
    public GameObject bullet;

    public float bulletSpeed;
    public float fireRate = 0.2f;
    public float health = 1000;

    public AudioClip fireSound;
    public AudioClip deathSound;
    public AudioClip hitSound;

    float xmin;
    float xmax;


    // Use this for initialization
    void Start()
    {
        float distanceToCamera = transform.position.z - Camera.main.transform.position.z;
        Vector3 leftmost = Camera.main.ViewportToWorldPoint(new Vector3(0, 0, distanceToCamera));
        Vector3 rightmost = Camera.main.ViewportToWorldPoint(new Vector3(1, 0, distanceToCamera));
        xmin = leftmost.x + padding;
        xmax = rightmost.x - padding;
    }

    void Fire()
    {
        Vector3 offset = new Vector3(0.25f, 0.8f, 0);
        GameObject shot = Instantiate(bullet, transform.position+offset, Quaternion.identity) as GameObject;
        shot.rigidbody2D.velocity = new Vector3(0, bulletSpeed, 0);
        AudioSource.PlayClipAtPoint(fireSound, transform.position);
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Mouse0))
        {
            InvokeRepeating("Fire", 0.00001f, fireRate);
        }
        if (Input.GetKeyUp(KeyCode.Mouse0))
        {
            CancelInvoke("Fire");
        }

        if (Input.GetKey(KeyCode.A))
        {
            transform.position += Vector3.left * speed * Time.deltaTime;

        }
        else if (Input.GetKey(KeyCode.D))
        {
            transform.position += Vector3.right * speed * Time.deltaTime;

            float newX = Mathf.Clamp(transform.position.x, xmin, xmax);
            transform.position = new Vector3(newX, transform.position.y, transform.position.z);
        }
    }

    void OnTriggerEnter2D(Collider2D collider)
    {
        projectile acid = collider.gameObject.GetComponent<projectile>();
        if (acid)
        {
            health -= acid.GetDamage();
            acid.Hit();
            AudioSource.PlayClipAtPoint(hitSound, transform.position);
            if (health <= 0)
            {
                Death();
            }
        }
    }

    void Death()
    {
        AudioSource.PlayClipAtPoint(deathSound, transform.position);
        Destroy(gameObject);
    }
}