using System;
using UnityEngine;
using UnityEngine.Serialization;

[RequireComponent(typeof(BoxCollider2D))]
[RequireComponent(typeof(Rigidbody2D))]
public class PlayerController2D : MonoBehaviour {
    [SerializeField] private float speed = 9;
    [FormerlySerializedAs("jumpHeight")] [SerializeField] private float jumpForce = 300;
    [SerializeField] private float movementSmoothing = .4f;
    [SerializeField] private LayerMask whatIsGround;
    [SerializeField] private bool allowAirControl = true;
    [FormerlySerializedAs("GroundedRadius")] [SerializeField] private float groundedRadius = .2f;
    [SerializeField] private bool isGrounded;
    
    private BoxCollider2D _boxCollider;
    private Rigidbody2D _rigidbody;
    private Vector2 _velocity = Vector2.zero;

    private void Awake() {
        _boxCollider = GetComponent<BoxCollider2D>();
        _rigidbody = GetComponent<Rigidbody2D>();
    }

    private void FixedUpdate() {
        isGrounded = false;

        Collider2D[] colliders = Physics2D.OverlapCircleAll(_boxCollider.bounds.min, groundedRadius, whatIsGround);
        foreach (Collider2D collider in colliders) {
            if (collider != _boxCollider) {
                isGrounded = true;
            }
        }
    }

    private void Update() {
        float moveAmount = Input.GetAxisRaw("Horizontal");
        bool isJumping = Input.GetButtonDown("Jump");

        if (isGrounded || allowAirControl) {
            Vector2 target = new Vector2(moveAmount * speed, _rigidbody.velocity.y);
            _rigidbody.velocity = Vector2.SmoothDamp(_rigidbody.velocity, target, ref _velocity, movementSmoothing);
        }

        if (isGrounded && isJumping) {
            isGrounded = false;
            _rigidbody.AddForce(new Vector2(0f, jumpForce));
        }
    }
}