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

public class tetromino : MonoBehaviour
{
    public int timeBetweenSteps;
    public bool active = true;
    private float timer = 0.0f;

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        timer += Time.deltaTime;

        if (timer >= timeBetweenSteps && active)
        {
            Debug.Log("Time elapsed!");
            timer = timer - timeBetweenSteps;
            nextStep();
        }
    }

    void nextStep()
    {
        if (validateFall())
        {
            Fall();
        }
        else
        {
            active = false;
            Fall();
        }
    }

    private bool validateFall()
    {
        //Cast a ray to the next position of the tetromino.
        RaycastHit2D collision = Physics2D.Raycast(transform.position, Vector2.down, 1.0f);
        if (collision.collider != null)
        {
            //We hit something, but what?
            if (collision.collider.CompareTag("Ground") || collision.collider.CompareTag("Tetromino"))
            {
                Debug.Log("Collision with ground!");
                return false;
            }
            Debug.Log("Collision!");
            return false;
        }
        else
        {
            return true;
        }
    }

    void Fall()
    {
        transform.position += Vector3.down * 1.0f;
    }
}