using UnityEngine;
using System.Collections;

[RequireComponent(typeof(PlayerPhisics))]
public class PlayerControl : MonoBehaviour {

    // Player Handling
    public float gravity = 20;
    public float speed = 8;
    public float acceleration = 30;
    public float jumptHeight = 12;

    private float currentSpeed;
    private float targetSpeed;
    private Vector2 amountToMove;

    private PlayerPhisics playerPhisics;

    void Start () {
        playerPhisics = GetComponent<PlayerPhisics>();
    }


    void Update () {

        if (playerPhisics.movementStopped)
        {
            targetSpeed = 0;
            currentSpeed = 0;
        }

        //Input
        targetSpeed = Input.GetAxisRaw("Horizontal") * speed;
        currentSpeed = IncrementTowards(currentSpeed, targetSpeed, acceleration);

        if (playerPhisics.grounded) {
            amountToMove.y = 0;
            //Jump
            if (Input.GetButtonDown("Jump")) {
                amountToMove.y = jumptHeight;
            }
        }

        amountToMove.x = currentSpeed;
        amountToMove.y -= gravity * Time.deltaTime;
        playerPhisics.Move(amountToMove * Time.deltaTime);
    }

    //Increse it towards target by speed
    private float IncrementTowards(float n, float target, float a) {
        if (n == target) {
            return n;
        } else {
            float dir = Mathf.Sign(target - n);
            n += a * Time.deltaTime * dir;
            return (dir == Mathf.Sign(target - n))? n: target;
        }
    }

}