using UnityEngine;
using System.Collections;

public class PlayerMovementScript : MonoBehaviour {

    Rigidbody2D rb2d;

    //Movement
    float MaxSpeed;
    public float MaxNormalSpeed = 10f;
    public float MaxSprintSpeed = 15f;
    public float ForceFactor = 60f;
    public bool FacingRight = true;

    //Movement animation
    GameObject PlayerTrail;

    //Jump
    public float jumpShortSpeed = 10f;
    public float jumpSpeed = 30f;
    bool jump = false;
    bool jumpCancal = false;
    public bool grounded = true;

    void Start ()
    {
        rb2d = gameObject.GetComponent<Rigidbody2D>();
        MaxSpeed = MaxNormalSpeed;
        PlayerTrail = GameObject.FindGameObjectWithTag("PlayerTrail");
    }
	
	void Update ()
    {
        //Jump
        if (Input.GetButtonDown("Jump") && grounded)
        {
            jump = true;
        }
        if (Input.GetButtonUp("Jump") && !grounded)
        {
            jumpCancal = true;
        }
    }

    void FixedUpdate()
    {
        //Horizontal
        rb2d.AddForce(Vector2.right * Input.GetAxis("Horizontal") * ForceFactor);

        //Left-Right Movement
        if (rb2d.velocity.x > 0.0001f)
        {
            transform.localScale = new Vector3(1, 1, 1);
            FacingRight = true;
        }
        if (rb2d.velocity.x < -0.0001f)
        {
            transform.localScale = new Vector3(-1, 1, 1);
            FacingRight = false;
        }

        //Max Speed
        if (rb2d.velocity.x > MaxSpeed)
        {
            rb2d.velocity = new Vector2(MaxSpeed, rb2d.velocity.y);
        }
        else if (rb2d.velocity.x < -MaxSpeed)
        {
            rb2d.velocity = new Vector2(-MaxSpeed, rb2d.velocity.y);
        }

        //Sprint
        if (Input.GetAxis("Sprint") == 1)
        {
            MaxSpeed = MaxSprintSpeed;
        }
        if (Input.GetAxis("Sprint") == 0)
        {
            
            if (rb2d.velocity.x > MaxNormalSpeed )
            {
                MaxSpeed = Mathf.Lerp(rb2d.velocity.x, MaxNormalSpeed, .1f);
            }
            else if (rb2d.velocity.x < -MaxNormalSpeed)
            {
                MaxSpeed = Mathf.Lerp(-rb2d.velocity.x, MaxNormalSpeed, .1f);
            }
        }

        //Sprint animation
        if (rb2d.velocity.x == MaxSprintSpeed || rb2d.velocity.x == -MaxSprintSpeed)
        {
            PlayerTrail.SetActive(true);
        }
        else if (rb2d.velocity.x < 10.1f && rb2d.velocity.x > -10.1f)
            PlayerTrail.SetActive(false);


        //Jump

        if (jump)
        {
            rb2d.velocity = new Vector2(rb2d.velocity.x, jumpSpeed);
            jump = false;
        }
        if (jumpCancal)
        {

            if (rb2d.velocity.y > jumpShortSpeed)
                rb2d.velocity = new Vector2(rb2d.velocity.x, Mathf.Lerp(rb2d.velocity.y, jumpShortSpeed, .6f));
            jumpCancal = false;
        }
    }

    public void StopPlayer()
    {
        rb2d.velocity = new Vector2(0, 0);
        PlayerTrail.SetActive(false);
    }
}