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

public class Laser : MonoBehaviour {

	public GameObject prefab;
	public float laserPower;
	// Use this for initialization
	void Start () {

	}

	// Update is called once per frame
	void Update () {
		//we use rays to project invisible lines at a distance
		//in this case, we are using the ScreenPointToRay function of our main camera
		//to convert the mouse position on the screen into a direction projected through the screen
		//(in class, i drew a dinosaur on the other side)
		Ray beam = Camera.main.ScreenPointToRay(Input.mousePosition);

		//draw our debug ray so we can see inside unity
		//the ray starts from beam.origin and is drawn to 1000 units in the rays direction (beam.direction)
		Debug.DrawRay(beam.origin, beam.direction * 1000f, Color.red);

		//declare and initialize our raycasthit to store hit information
		RaycastHit beamHit = new RaycastHit();

		//this both casts the ray "beam" and returns true if the ray hits any collider
		//the second parameter is where our raycasthit information is stored
		//the third parameter is how far to cast the ray
		if (Physics.Raycast(beam, out beamHit, 1000f)){

			//if the raycast hits a rigidbody and the player is pressing the right mouse button
			if (beamHit.rigidbody && Input.GetMouseButton(0)){
				//we use insideunitsphere to get a random 3D direction and multiply the direction by our power variable
				beamHit.rigidbody.AddForce(Random.insideUnitSphere * laserPower);
			}

			//if the raycast hits something and the player is pressing the right mouse button
			if (Input.GetMouseButton(1)){
				//Instantiate(prefab, beamHit.point, Quaternion.identity);
				//Debug.Log(beamHit.point);
			}
			//if the raycast hits something and the player is pressing the middle mouse button
			if (Input.GetMouseButton(2)){
				//Destroy this will delete this script from the object its attached to
				//Destroy(this);

				//we can also destroy a given gameobject
				//using our raycasthit beamhit to access the transform of the thing hit and its parent gameobject
				//Destroy(beamHit.transform.gameObject);
			}
		}
	}
}