using UnityEngine;

public class PlayerController : MonoBehaviour
{
    public float walkForce = 50;
    public float maxWalkSpeed = 5;

    public float jumpForce = 400;
    public float groundedCollisionArea = 1f;
    public LayerMask floorMask;

    private Rigidbody2D rb;

    private bool jumped = false;

    // Start is called before the first frame update
    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
    }

    // FixedUpdate is called once per physics frame
    void FixedUpdate()
    {
        /*
         *  JUMPING
         */
        // Check if we are on the ground by drawing a box around the centre of the player character
        var grounded = Physics2D.OverlapBox(transform.position, Vector2.one * groundedCollisionArea, 0, floorMask);

        // If we are jumping and have reached the ground and the player isn't holding space anymore, allow jumping again.
        // Note this would allow buggy super jumping if the player can hammer space fast enough...
        if (jumped && grounded && !Input.GetKey("space"))
        {
            Debug.Log("Jump reset");
            jumped = false;
        }

        // If we are on the ground and aren't in the middle of a jump. Do a jump.
        if(grounded && !jumped && Input.GetKey("space"))
        {
            Debug.Log("JUMP");
            rb.AddForce(Vector2.up * jumpForce);
            // Prevent jumping until we have hit the ground again
            jumped = true;
        }

        /*
         * WALKING
         */
        var input = Input.GetAxisRaw("Horizontal");

        // Check if the input is in the opposite direction to the player's current direction of travel.
        // This makes changing direction always happen, including in the air
        if(Mathf.Sign(input) != Mathf.Sign(rb.velocity.x))
        {
            rb.AddForce(new Vector2(walkForce * input, 0));
        }
        // Only apply more movement speed when the player is below a max speed
        else if (input != 0f && Mathf.Abs(rb.velocity.x) < maxWalkSpeed)
        {
            rb.AddForce(new Vector2(walkForce * input, 0));
        }

    }
}