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

public class Player : MonoBehaviour {
    private Rigidbody2D myRigidbody;

    private Animator myAnimator;

    [SerializeField]
    private float movementSpeed;

    private bool facingRight;

    [SerializeField]
    private bool airControl;

    [SerializeField]
    private Transform[] groundPoints;

    [SerializeField]
    private float groundRadius;

    [SerializeField]
    private LayerMask whatIsGround;

    private bool grounded;

    private bool jump;



    [SerializeField]
    private float jumpForce;

    // Use this for initialization
    void Start () {
        facingRight = true;
        myRigidbody = GetComponent<Rigidbody2D> ();
        myAnimator = GetComponent<Animator> ();
    }

    // Update is called once per frame
    void Update()
    {
        HandleInput ();
    }

    private void FixedUpdate ()
    {
        float horizontal = Input.GetAxis("Horizontal");

        grounded = IsGrounded();

        HandleMovement(horizontal);

        Flip(horizontal);

        HandleLayers ();

        ResetValues ();

    }

    private void HandleMovement(float horizontal)
    {
        if (myRigidbody.velocity.y < 0)
        {
            myAnimator.SetBool ("Land", true);
        }
    if (grounded && jump)
    {
        grounded = false;

        myRigidbody.AddForce(new Vector2(0f,700));
            myAnimator.SetTrigger ("Jump");
    }
        if(grounded || airControl)
    {
        myRigidbody.velocity = new Vector2 (horizontal * movementSpeed, myRigidbody.velocity.y);

        myAnimator.SetFloat ("speed", Mathf.Abs(horizontal));
        }
    }

    private void HandleInput()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {jump = true;
            }
        }


    private void Flip(float horizontal)
    {
        if (horizontal > 0 && !facingRight || horizontal < 0 && facingRight) {
            facingRight = !facingRight;

            Vector3 theScale = transform.localScale;

            theScale.x *= -1;

            transform.localScale = theScale;
        }
    }

        private void ResetValues()
        {
            jump = false;
}
    private bool IsGrounded()
    {
        //Cheks if we are falling or if the y axis is steady
        if (myRigidbody.velocity.y <= 0)
        {
            //Runs through all the ground points
            foreach (Transform point in groundPoints)
            {
                //Makes an array of all colliders that are overlapping the ground points
                Collider2D[] colliders = Physics2D.OverlapCircleAll(point.position, groundRadius, whatIsGround);

                //Runs through the colliders to check if we are overlapping something that isn't the player
                for (int i = 0; i < colliders.Length; i++)
                {
                    if (colliders[i].gameObject != gameObject) //If we are overlapping something else than our self
                    {
                        myAnimator.ResetTrigger ("jump");
                        myAnimator.SetBool ("Land", false);//Stops the land animation
                        return true;
                    }
                }
            }
        }


        return false; //We are not grounded
    }

    private void HandleLayers()
    {
        if(!grounded)
        {
            myAnimator.SetLayerWeight (1, 1);
        }
        else
        {
            myAnimator.SetLayerWeight (1, 0);
}
    }
}