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

public class Movement : MonoBehaviour
{
    [Header("Movement")]
    public float speed;
    Rigidbody2D body;
    Vector2 mov;
    public bool FacingRight = true;
    public bool canMov = true;

    [Header("Jump")]
    public float jumpForce;
    public bool grounded = false;
    public Transform groundCheck;
    private float nextJump = 0.5f;
    public float extraJump = 0;

    [Header("Input")]
    float moveHorizontal;

    [Header("Animation")]
    Animator anim;

    void Start()
    {
        body = GetComponent<Rigidbody2D>();
        anim = GetComponent<Animator>();
    }

    // Update is called once per frame
    void Update()
    {
        if (canMov)
        {
            moveHorizontal = Input.GetAxis("Horizontal");

            grounded = Physics2D.Linecast(transform.position, groundCheck.position, 1 << LayerMask.NameToLayer("Ground"));
            Debug.DrawLine(transform.position, groundCheck.position, Color.green);

            if (Input.GetButtonDown("Jump") && grounded)
            {
                if (Time.time > nextJump)
                {
                    nextJump = Time.time + 0.5f;
                    StartCoroutine(Jump());
                }
            }
            if (Input.GetButton("Jump") && !grounded)
            {
                extraJump += Time.deltaTime * jumpForce * 50;
            }
            else
            {
                extraJump = 0;
            }
        }
    }

    void FixedUpdate()
    {
        if (canMov)
        {
            Move();
        }
    }

    void Move()
    {
        mov = new Vector2(moveHorizontal * speed, body.velocity.y);
        body.velocity = mov;

        //FacingParameters
        if (moveHorizontal > 0 && !FacingRight)
        {
            Flip();
        }
        else if (moveHorizontal < 0 && FacingRight)
        {
            Flip();
        }

        //AnimParameters
        if (moveHorizontal != 0)
            AnimHorizontal();

    }

    IEnumerator Jump()
    {
        body.AddForce(new Vector2(0, jumpForce),ForceMode2D.Impulse);
        float elapsedTime = 0;
        while (elapsedTime < 0.18f)
        {
            elapsedTime += Time.deltaTime;
            body.AddForce(new Vector2(0, extraJump), ForceMode2D.Force);
            yield return new WaitForSeconds(0);
        }
    }


    public void Flip()
    {
        FacingRight = !FacingRight;
        Vector3 X_Scale = transform.localScale;
        X_Scale.x *= -1;
        transform.localScale = X_Scale;
    }

    void AnimHorizontal()
    {
        anim.SetFloat("Walk", Mathf.Abs(moveHorizontal));
    }
}