using UnityEngine;
using System.Collections;

public class ButtonSpermicidalWave : MonoBehaviour
{
	private static Transform _transform;
	public static Transform GetTransform() { return _transform; }

	public UISprite sprite;
	public UILabel counter;

	bool _isEnabled;
	bool _hasBeenPressed;

	bool _waveInScene;
	int _usedWavesInThisLevel;

	#region Unity Callbacks
	void Awake()
	{
		_transform = transform;
	}
	
	void OnEnable()
	{
		NotificationCenter.AddListener(OnPickedUpSpermicidalWave, NotificationType.PickedUpSpermicidalWave);
		NotificationCenter.AddListener(OnPlaybackFireSpermicidalWave, NotificationType.PlaybackFireSpermicidalWave);
		NotificationCenter.AddListener(OnGameStart, NotificationType.GameStart);
		NotificationCenter.AddListener(OnStartSpawningEnemies, NotificationType.StartSpawningEnemies);
		NotificationCenter.AddListener(OnSpermicidalWaveDespawned, NotificationType.SpermicidalWaveDespawned);
		UpdateCounterLabel();
	}

	void OnDisable()
	{
		NotificationCenter.RemoveListener(OnPickedUpSpermicidalWave, NotificationType.PickedUpSpermicidalWave);
		NotificationCenter.RemoveListener(OnPlaybackFireSpermicidalWave, NotificationType.PlaybackFireSpermicidalWave);
		NotificationCenter.RemoveListener(OnGameStart, NotificationType.GameStart);
		NotificationCenter.RemoveListener(OnStartSpawningEnemies, NotificationType.StartSpawningEnemies);
		NotificationCenter.RemoveListener(OnSpermicidalWaveDespawned, NotificationType.SpermicidalWaveDespawned);
	}

	public void CustomFixedUpdate()
	{
		if (_hasBeenPressed)
		{
			_hasBeenPressed = false;
			NotificationCenter.Post(NotificationType.FireSpermicidalWave);
			InventoryManager.Instance.Consume(InventoryItem.specialwave);
			UpdateCounterLabel();
		}
	}
	#endregion

	#region Notification Callbacks
	void OnGameStart(Notification note)
	{
		_waveInScene = false;
		_usedWavesInThisLevel = 0;
		GetComponent<Collider>().enabled = false;
	}

	void OnStartSpawningEnemies(Notification note)
	{
		GetComponent<Collider>().enabled = true;
		SetButtonEnabled(HasInInventory());
	}

	void OnPickedUpSpermicidalWave(Notification note)
	{
		Logger.LogFlurryEvent("Picked up Spermicidal Wave");
		InventoryManager.Instance.Increment(InventoryItem.specialwave);
		UpdateCounterLabel();
		SetButtonEnabled(true);
	}

	void OnPlaybackFireSpermicidalWave(Notification note)
	{
		_hasBeenPressed = true;
	}

	void OnSpermicidalWaveDespawned(Notification note)
	{
		_waveInScene = false;
	}
	#endregion

	#region NGUI Callbacks
	void OnClick()
	{
		if (HasInInventory())
		{
			if (_usedWavesInThisLevel < GameConstants.MAX_WAVES_PER_LEVEL)
			{
				if (!_waveInScene &&
					!_hasBeenPressed)
				{
					_waveInScene = true;
					_hasBeenPressed = true;
					++_usedWavesInThisLevel;
					Logger.LogFlurryEvent("Used Spermicidal Wave");
					if (!HasInInventory())
					{
						SetButtonEnabled(false);
					}
				}
			} else
			{
				Logger.LogFlurryEvent("Tried Spermicidal Wave but reached limit per level");
				NotificationCenter.Post(NotificationType.ShowGenericNotification, string.Format(Localization.instance.Get("spermicidalWave.limitPerLevelReached"), GameConstants.MAX_WAVES_PER_LEVEL));
			}
		} else
		{
			//NotificationCenter.Post(NotificationType.ShowGenericNotification, Localization.instance.Get("spermicidalWave.needToBuyNotification"));
		}
	}
	#endregion

	void SetButtonEnabled(bool isEnabled)
	{
		if (!isEnabled)
		{
			iTween.Stop(gameObject);
			CancelInvoke("Flash");
			sprite.alpha = 0.2f;
		} else
		//if it is not already enabled
		if (!_isEnabled)
		{
			//A bit hacky, but the alternative complicates life
			Invoke("Flash", Pickup.PICKUP_ANIMATION_TIME);
		}
		_isEnabled = isEnabled;
	}

	#region Flashing visual feedback
	int _flashesRemaining;
	protected virtual void Flash()
	{
		_flashesRemaining = 5;

		sprite.alpha = 1;
		AlphaDown();
	}

	void AlphaDown()
	{
		AnimateAlpha(1, 0);
	}

	void AlphaUp()
	{
		AnimateAlpha(0, 1);
	}

	void AnimateAlpha(float from, float to)
	{
		float flashTime = 0.2f;
		iTween.ValueTo(gameObject, iTween.Hash(
			"from", from,
			"to", to,
			"time", flashTime,
			"onupdate", "OniTweenUpdateSpriteAlpha",
			"onupdatetarget", gameObject,
			"oncomplete", "OniTweenFadeComplete",
			"oncompletetarget", gameObject));
	}

	void OniTweenUpdateSpriteAlpha(float newAlpha)
	{
		sprite.alpha = newAlpha;
	}

	void OniTweenFadeComplete()
	{
		--_flashesRemaining;
		if (_flashesRemaining > 0)
		{
			if (_flashesRemaining % 2 == 0)
			{
				AlphaDown();
			} else
			{
				AlphaUp();
			}
		}
	}
	#endregion

	void UpdateCounterLabel()
	{
		counter.text = GetCountInInventory().ToString();
	}

	bool HasInInventory()
	{
		return GetCountInInventory() > 0;
	}

	int GetCountInInventory()
	{
		return InventoryManager.Instance.GetItemCount(InventoryItem.specialwave);
	}
}