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

public class PlatformerLayerMaskShoot2D : MonoBehaviour
{
    public float speed = 8;
    public float jumpForce = 24;
    [SerializeField] private Transform groundCheck;
    [SerializeField] private LayerMask groundLayer;
    public GameObject bullet;
    public GameObject bulletPos;
    public float bulletSpeed = 100.0f;
    Rigidbody2D rb;
    float horizontal;
    bool isFacingRight = true;

    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
    }

    void Update()
    {
        horizontal = Input.GetAxisRaw("Horizontal");

        if (Input.GetButtonDown("Jump") == true && IsGrounded() == true)
        {
            rb.velocity = new Vector2(rb.velocity.x, jumpForce);
        }

        if (Input.GetButtonUp("Jump") == true  && rb.velocity.y > 0f)
        {
            rb.velocity = new Vector2(rb.velocity.x, rb.velocity.y * 0.5f);
        }

        if (Input.GetButtonDown("Fire1"))
        {
            Fire();
        }

        Flip();
    }

    void FixedUpdate()
    {
        rb.velocity = new Vector2(horizontal * speed, rb.velocity.y);
    }

    bool IsGrounded()
    {
        return Physics2D.OverlapCircle(groundCheck.position, 0.2f, groundLayer);
    }

    void Flip()
    {
        if (isFacingRight == true && horizontal < 0f || isFacingRight == false && horizontal > 0f)
        {
            isFacingRight = !isFacingRight;
            Vector3 localScale = transform.localScale;
            localScale.x *= -1;
            transform.localScale = localScale;
        }
    }

    void Fire()
    {
        GameObject tmp;

        if (isFacingRight == true)
        {
            tmp = Instantiate(bullet, bulletPos.transform.position, Quaternion.Euler(0, 0, 0));
            tmp.GetComponent<Rigidbody2D>().AddForce(new Vector2(10, 0) * bulletSpeed);
        }
        else
        {
            tmp = Instantiate(bullet, bulletPos.transform.position, Quaternion.Euler(0, 0, 180));
            tmp.GetComponent<Rigidbody2D>().AddForce(new Vector2(-10, 0) * bulletSpeed);
        }     
        
        Destroy(tmp, 5f);
    }
}