using UnityEngine;

public class VerticalBar : MonoBehaviour
{
    public float firingSpeed = 0.03f;

    public GameObject verticalBarrierPrefab;

    public bool canFireTop = true;

    public bool canFireBottom = true;

    private float firingTimer = 0.0f;

    private Bounds bounds;

    private bool canFire = true;

    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        SpriteRenderer spriteRenderer = GetComponent<SpriteRenderer>();
        bounds = spriteRenderer.bounds;

        var walls = GameObject.FindGameObjectsWithTag("Wall");

        if (walls.Length > 0)
        {
            foreach (var wall in walls)
            {
                if (wall.GetComponent<Collider2D>().bounds.Intersects(bounds))
                {
                    canFire = false;
                    break;
                }
            }
        }
    }

    // Update is called once per frame
    void FixedUpdate()
    {
        if (canFire)
        {
            firingTimer += Time.fixedDeltaTime;

            if (firingTimer >= firingSpeed)
            {
                if (canFireTop)
                {
                    Vector3 topSide = new Vector3(
                        bounds.center.x,
                        bounds.max.y + (bounds.size.y / 2.0f),
                        bounds.center.z
                    );

                    var top = Instantiate(verticalBarrierPrefab, topSide, Quaternion.identity);
                    var topBarScript = top.GetComponent<VerticalBar>();
                    topBarScript.firingSpeed = firingSpeed;
                    topBarScript.canFireBottom = false;

                    Physics2D.IgnoreCollision(
                        top.GetComponent<Collider2D>(), 
                        GetComponent<Collider2D>(), 
                        true
                    );
                }

                if (canFireBottom)
                {
                    Vector3 bottomSide = new Vector3(
                        bounds.center.x,
                        bounds.min.y - (bounds.size.y / 2.0f),
                        bounds.center.z
                    );
                    var bottom = Instantiate(verticalBarrierPrefab, bottomSide, Quaternion.identity);
                    var bottomBarScript = bottom.GetComponent<VerticalBar>();
                    bottomBarScript.firingSpeed = firingSpeed;
                    bottomBarScript.canFireTop = false;

                    Physics2D.IgnoreCollision(
                        bottom.GetComponent<Collider2D>(), 
                        GetComponent<Collider2D>(), 
                        true
                    );
                }

                canFire = false;
            }
        }
    }
}