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

public class PlayerController : MonoBehaviour
{
    public float speed = 100.0f;
    public float jumpForce = 350.0f;
    public float airDrag = 0.8f;

    private Rigidbody2D body;
    private SpriteRenderer spriteRenderer;
    public Animator animator;
    private UnityEngine.Experimental.Rendering.Universal.Light2D headLight;
    PlayerHealth player;

    private Vector2 currentVelocity;
    private float previousPositionY;
    public Grid background;

    public bool isGrounded = true;
    public bool notFloating = true;
    public int yVelocity;
    public int xVelocity;
    private bool groundCheck = true;
    private bool jumpOk;
    public bool invincibilityTimer = false;

    // Start is called before the first frame update
    void Start()
    {
        body = GetComponent<Rigidbody2D>();
        spriteRenderer = GetComponent<SpriteRenderer>();
        headLight = GetComponentInChildren<UnityEngine.Experimental.Rendering.Universal.Light2D>();
        player = GetComponent<PlayerHealth>();

    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.Space))
        {
            jumpOk = true;
        }
        if (Time.timeScale == 0)
        {
            jumpOk = false;
        }
    }
    void OnCollisionStay2D(Collision2D collider)
    {
        if (collider.gameObject.CompareTag("Ground"))
        {
            int i = 0;
            foreach (ContactPoint2D contact in collider.contacts)
            {
                if (0.15f > (body.transform.position.y - contact.point.y) && (body.transform.position.y - contact.point.y) > 0.147f)
                {
                    isGrounded = true;
                }
                i++;

            }
        }
    }
    private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.gameObject.CompareTag("Hazard") && !invincibilityTimer)
        {
            Debug.Log("dis hurts");
            player.ChangeHealth(-40);
            invincibilityTimer = true;
            Invoke("ResetInvulnerability", 2);
        }

    }
    private void FixedUpdate()
    {
        if (Time.timeScale > 0)
            Move();
    }

    private void Move()
    {
        bool isJumping = false;
        float velocity = Input.GetAxis("Horizontal") * speed;
        if (jumpOk)
        {
            isJumping = Input.GetKey(KeyCode.Space);
        }
        xVelocity = Mathf.RoundToInt(body.velocity.x);

        if (!isGrounded)
        {
            velocity *= airDrag;
        }

        // Horizontal Movement
        body.velocity = Vector2.SmoothDamp(body.velocity, new Vector2(velocity, body.velocity.y), ref currentVelocity, 0.02f);
        // Initiate Jump
        yVelocity = Mathf.RoundToInt(body.velocity.y);
        if (yVelocity < 0 || yVelocity == 0 && xVelocity != 0)
        {
            notFloating = true;
        }
        // Initiate Jump
        if (isGrounded && yVelocity == 0 && notFloating == true)
        {
            groundCheck = true;
            if (isJumping)
            {
                body.AddForce(new Vector2(0, jumpForce));
                isGrounded = false;
            }
        }
        else
        {
            groundCheck = false;
        }

        if (yVelocity > 0)
        {
            notFloating = false;
        }

        // Cancel Jump
        if (!isJumping && body.velocity.y > 0.01f)
        {
            body.velocity = new Vector2(body.velocity.x, body.velocity.y * 0.95f);
        }

        if (velocity < 0 && spriteRenderer.flipX == false)
        {
            spriteRenderer.flipX = true;
            headLight.transform.rotation = Quaternion.Inverse(headLight.transform.rotation);
        }
        else if (velocity > 0 && spriteRenderer.flipX == true)
        {
            spriteRenderer.flipX = false;
            headLight.transform.rotation = Quaternion.Inverse(headLight.transform.rotation);
        }


        animator.SetFloat("VelocityY", Mathf.RoundToInt(body.velocity.y));

        animator.SetFloat("VelocityX", Mathf.Abs(body.velocity.x));
        animator.SetBool("IsGrounded", groundCheck);
    }
    void ResetInvulnerability()
    {
        invincibilityTimer = false;
    }
}