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

public class AsteroidControl : MonoBehaviour
{
    public LineRenderer catapultLineFront;
    public LineRenderer catapultLineBack;
    SpringJoint2D spring;
    Vector2 prevVelocity;
    Ray leftCatpultToProjectile;

    bool clickedOn;

    void OnMouseDown()
    {
        clickedOn = true;
    }

    void OnMouseUp()
    {
       
        clickedOn = false;
        GetComponent<Rigidbody2D>().isKinematic = false;
 
    }

    void Awake()
    {
        spring = GetComponent<SpringJoint2D>();
    }

    // Start is called before the first frame update
    void Start()
    {
        LineRendererSetup();
        leftCatpultToProjectile = new Ray(catapultLineFront.transform.position, Vector3.zero);
    }


    void LineRendererSetup()
    {
        catapultLineFront.SetPosition(0, catapultLineFront.transform.position);
        catapultLineBack.SetPosition(0, catapultLineBack.transform.position);

        catapultLineFront.sortingLayerName = "Foreground";
        catapultLineBack.sortingLayerName = "Foreground";

        catapultLineFront.sortingOrder = 3;
        catapultLineBack.sortingOrder = 1;
    }

    // Update is called once per frame
    void Update()
    {
        if (clickedOn)
        {
            Dragging();
        }

     if (spring != null)
        {
            if (!GetComponent<Rigidbody2D>().isKinematic && prevVelocity.sqrMagnitude>GetComponent<Rigidbody2D>().velocity.sqrMagnitude)
            {
                Destroy(spring);
                GetComponent<Rigidbody2D>().velocity = prevVelocity;
            }
        }
        else
        {
            catapultLineFront.enabled = false;
            catapultLineBack.enabled = false;
        }

        prevVelocity = GetComponent<Rigidbody2D>().velocity;
       

        LineRendererUpdate();
           
    }
    void LineRendererUpdate()
    {
        Vector2 catpultToProjectile = transform.position - catapultLineFront.transform.position;
        Vector3 holdPoint = transform.position;
        catapultLineFront.SetPosition(1, holdPoint);
        catapultLineBack.SetPosition(1, holdPoint);
    }

    void Dragging()
    {
        Vector3 mouseWorldPoint = Camera.main.ScreenToWorldPoint(Input.mousePosition);
        mouseWorldPoint.z = 0f;
        transform.position = mouseWorldPoint;
    }
}