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

public class PlayerBehaviour : MonoBehaviour
{
    // Variable set for calculation in update

    // Max speed, in units per second, that the character moves.
    float speed = 9;
    // Acceleration while grounded
    float walkAcceleration = 75;
    // Acceleration while in the air
    float airAcceleration = 30;
    // Deceleration applied when character is grounded and not attempting to move
    float groundDeceleration = 70;
    // Max height the character will jump regardless of gravity
    float jumpHeight = 4;


    // Main Unity Physics ref
    private Vector2 velocity;

    // Additional ref
    private Rigidbody2D rb;
    private BoxCollider2D boxCollider;

    // State for checking
    public enum State
    {
        Ground = 0,
        Jump = 1,
        Fall = 2,
    }

    private State state = State.Ground;

    // Update is called once per frame
    void Update()
    {
        float moveInput = Input.GetAxisRaw("Horizontal");
        velocity.x = Mathf.MoveTowards(velocity.x, speed * moveInput, walkAcceleration * Time.deltaTime);

        transform.Translate(velocity * Time.deltaTime);

        if (moveInput != 0)
        {
            velocity.x = Mathf.MoveTowards(velocity.x, speed * moveInput, walkAcceleration * Time.deltaTime);
        }
        else
        {
            velocity.x = Mathf.MoveTowards(velocity.x, 0, groundDeceleration * Time.deltaTime);
        }

        if (state == State.Ground && Input.GetButtonDown("Jump"))
        {
            velocity.y = Mathf.Sqrt(2 * jumpHeight * Mathf.Abs(Physics2D.gravity.y));

            velocity.y += Physics2D.gravity.y * Time.deltaTime;
        }
    }

    void FixedUpdate()
    {
        //CameraWork goes here if nessary
    }

    void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Platform")
        {
            if (collision.gameObject.tag == "Platform")
            {
                state = State.Ground;
            }
        }
    }
    void OnCollisionExit2D(Collision2D collision)
    {
        if (collision.gameObject.tag == "Platform")
        {
            if (collision.gameObject.tag == "Platform")
            {
                if (state == State.Ground)
                {
                    state = State.Fall;
                }
            }
        }
    }
}