using UnityEngine;
using System.Collections;

public class CollisionState : MonoBehaviour {

	public LayerMask collisionLayer;
	public LayerMask enemyLayer;
	public bool onGround, onWall, onWallRight, onWallLeft;
	public Vector2 bottomPosition = Vector2.zero;
	public Vector2 rightPosition = Vector2.zero;
	public Vector2 leftPosition = Vector2.zero;
	public float collisionRadius = 1f;

	[HideInInspector]public Collider2D enemyHit;

	private InputState inputState;
	private Rigidbody2D body;
	private Animator animator;

	void Awake() {
		inputState = GetComponent<InputState>();
		body = GetComponent<Rigidbody2D>();
		animator = GetComponentInChildren<Animator>();
	}

	void Update() {
		animator.SetBool("on ground", onGround);
		animator.SetBool("on wall", onWall);
	}

	void FixedUpdate() {


		enemyHit = null;
		// onGround = Physics2D.OverlapCircle(body.position + bottomPosition, collisionRadius, collisionLayer);

		// onWallLeft = Physics2D.OverlapCircle(body.position + leftPosition, collisionRadius, collisionLayer);
		// onWallRight = Physics2D.OverlapCircle(body.position + rightPosition, collisionRadius, collisionLayer);
		// onWall = onWallRight || onWallLeft;
		enemyHit = Physics2D.OverlapCircle(body.position + bottomPosition, collisionRadius, enemyLayer);
	}

	// void OnDrawGizmosSelected() {
	// 	Gizmos.color = Color.red;

	// 	Vector2 pos = bottomPosition;
	// 	pos.x += transform.position.x;
	// 	pos.y += transform.position.y;

	// 	Gizmos.DrawWireSphere(pos, collisionRadius);

	// 	pos = rightPosition;
	// 	pos.x += transform.position.x;
	// 	pos.y += transform.position.y;

	// 	Gizmos.DrawWireSphere(pos, collisionRadius);

	// 	pos = leftPosition;
	// 	pos.x += transform.position.x;
	// 	pos.y += transform.position.y;

	// 	Gizmos.DrawWireSphere(pos, collisionRadius);
	// }

	float lastFixedTime;

	void OnCollisionStay2D(Collision2D collision) {
		if (Time.fixedTime != lastFixedTime) {
			// only reset flags at the start of each frame
			// (OnCollisionStay2D is called once for every collider this body is in contact with)
			onGround = false;
			onWallLeft = false;
			onWallRight = false;
			lastFixedTime = Time.fixedTime;
		}
		foreach (ContactPoint2D contact in collision.contacts) {
			Color color = Color.white;
			Vector2 normal = contact.normal;
			if (normal == Vector2.right) {
				color = Color.red;
				onWallLeft = true;
			}
			if (normal == -Vector2.right) {
				color = Color.green;
				onWallRight = true;
			}
			if (normal == Vector2.up) {
				color = Color.blue;
				onGround = true;
			}
			onWall = onWallLeft || onWallRight;
			Debug.DrawRay(contact.point, contact.normal, color);
		}
	}

	void OnCollisionExit2D() {
		// reset flags when we arent colliding with anything at all
		onGround = false;
		onWallLeft = false;
		onWallRight = false;
		onWall = false;
	}
}