using UnityEngine;

public class CharacterJump : MonoBehaviour
{
    private CharacterController characterController;

    private float movementSpeed = 5.0f;
    private float horizontalInput;
    private Vector3 movement;

    // Jump
    private float jumpHeight = 0.5f;
    private float gravity = 0.045f;
    private bool jump = false;

    private void Start()
    {
        characterController = GetComponent<CharacterController>();
    }

    private void Update()
    {
        horizontalInput = Input.GetAxis("Horizontal");

        if (!jump && Input.GetButtonDown("Jump"))
        {
            jump = true;
        }
    }

    private void FixedUpdate()
    {
        movement.x = horizontalInput * movementSpeed * Time.deltaTime;

        // Check if characterController is not grounded
        // and add gravity
        if (!characterController.isGrounded)
        {
            if (movement.y > 0)
            {
                // As we go up, apply normal gravity
                movement.y -= gravity;
            }
            else
            {
                // As we go down, apply "faster" gravity
                movement.y -= gravity * 1.5f;
            }
        }
        else
        {
            movement.y = 0;
        }

        // Setting jumpHeight to movement.y
        if (jump)
        {
            movement.y = jumpHeight;
            jump = false;
        }

        // Check if characterController exists and
        // then move player according to input
        if (characterController)
        {
            characterController.Move(movement);
        }
    }
}