using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class Actions : MonoBehaviour {

	public GameObject[] abilities = new GameObject[4];		// The array full of the character's abilities
	public GameObject currentAbility = null;				// Which ability is currently active
	private int abilitiesCounter = 0;						// A counter which lets you cycle through the abilities
	private Image abilitiesImage;							// Picture which shows which ability it active

	private Color abilityUnusable;
	private Color abilityUsable;

	public int fireballSpeed = 5;

	public bool waterShieldUsable = true;
	private float waterShieldTimer = 0.0f;
	public float waterShieldCooldown = 5.0f;

	private Vector3 LastInput = new Vector2(0, -1);

	void Start () {

		abilitiesImage = GameObject.FindGameObjectWithTag ("Cycle").GetComponent<Image>();
		// Set the initial ability to something so that it's not null
		CycleAbility();

		abilityUnusable = new Color(255.0f,255.0f,255.0f,0.5f);
		abilityUsable = new Color(255.0f,255.0f,255.0f,1.0f);
	}



	void Update () {

		RaycastHit2D hit = Physics2D.Raycast(transform.position, GetLastDirection());
		Debug.DrawRay(transform.position, GetLastDirection(), Color.red);

		// Constantly check where the player is facing
		GetLastDirection();

		if(Input.GetButtonDown("Fire1")) {
			UseAbility(currentAbility.name);
		}

		if(waterShieldUsable == false) {
			waterShieldTimer += Time.deltaTime;
			if(waterShieldTimer > waterShieldCooldown) {
				waterShieldUsable = true;
				waterShieldTimer = 0.0f;
			}

			abilitiesImage.GetComponent<Image>().color = abilityUnusable;
		} else {
			abilitiesImage.GetComponent<Image>().color = abilityUsable;
		}

		// If the player presses the button to choose an ability...
		if(Input.GetButtonDown("Fire2")) {
			
			// Increment the counter
			abilitiesCounter++;

			// Call the ChooseAbility() function
			CycleAbility();
		}
	}



	void CycleAbility() {
		
		// If the counter goes out of range of the array's size, reset it to 0
		if(abilitiesCounter > abilities.Length - 1) {
			abilitiesCounter = 0;
		}

		// Set the currentAbility to the one chosen by the abilitiesCounter
		currentAbility = abilities[abilitiesCounter];

		// Set the image of the gameObject of the ability equal to the picture of the currentAbility
		abilitiesImage.GetComponent<Image>().sprite = currentAbility.GetComponent<SpriteRenderer>().sprite;
	}



	public void UseAbility(string myCurrentAbility) {

		switch(myCurrentAbility) {

		case "Ability - Fireball":
			GameObject clone = Instantiate (currentAbility, this.transform.position, Quaternion.identity) as GameObject;
			clone.GetComponent<FireballProjectile>().move = LastInput;
			clone.GetComponent<FireballProjectile>().speed = fireballSpeed;
			break;

		case "Ability - Water Shield":
			if(waterShieldUsable == true) {
				GameObject myShield = (GameObject)Instantiate(currentAbility, transform.position, Quaternion.identity);
				WaterShield waterShield = myShield.GetComponent<WaterShield>();

				waterShieldUsable = false;
			}
			break;

		case "Ability - Rock":
			Debug.Log("Throwing a rock!");
			break;

		case "Ability - Breath of Air":
			Debug.Log("Casting breath of air!");
			break;
		}
	}



	public Vector3 GetLastDirection() {

		Vector3 input = new Vector3 (Input.GetAxisRaw ("Horizontal"), Input.GetAxisRaw ("Vertical"), 0);

		if (input.x == 0 && input.y == 0) {
			//do nothing	
		} else if (input.y != 0) {
			LastInput = new Vector3 (0, input.y, 0);
		} else {
			LastInput = new Vector3 (input.x, 0, 0);
		}

		return LastInput;
	}
}