using UnityEngine;
using UnityEngine.UI;

public class ScreenManager : MonoBehaviour {

	public static string LOCK_ID = "ScreenManager";

	public GenericPlayerManager playerManager;
	public RandomAnimations randomAnimations;

	public GameObject infoScreen;
	public GameObject translateScreen;
	public GameObject dictScreen;
	public GameObject tutorialScreen;
	public GameObject makersScreen;

	public SwitchImageAttribute textButtonImage;
	public SwitchImageAttribute dictButtonImage;
	public SwitchImageAttribute infoButtonImage;

	public GameObject loadingSnippet;
	public GameObject connectionErrorDialog;
	public GameObject pauseMenu;
	public GameObject repeatLayer;

	public BoxCollider avatarCollider;

	private bool exit = false;

	public void Update()
	{
		if (Input.GetKeyDown(KeyCode.Escape)) 
		{
			if (infoScreen.activeSelf)
			{
				infoScreen.SetActive(false);
				infoButtonImage.switchAttribute(false);
			}
			else if (translateScreen.activeSelf)
			{
				translateScreen.SetActive(false);
				textButtonImage.switchAttribute(false);
			}
			else if (dictScreen.activeSelf)
			{
				dictScreen.SetActive(false);
				dictButtonImage.switchAttribute(false);
			}
			else if (tutorialScreen.activeSelf)
			{
				tutorialScreen.SetActive(false);
			}
			else
			{
				if (exit) Application.Quit();

				exit = true;
			}
		}
	}

	public bool hasActiveScreen()
	{
		return 		this.infoScreen.activeSelf
				||	this.translateScreen.activeSelf
				||	this.dictScreen.activeSelf
				||	this.tutorialScreen.activeSelf
				||	this.makersScreen.activeSelf;
	}

	public void hideScreen()
	{
		setAvatarColliderState(true);
		randomAnimations.unlockFor(LOCK_ID);

		if (infoScreen.activeSelf)
		{
			infoScreen.SetActive(false);
			infoButtonImage.switchAttribute(false);
		}

		if (translateScreen.activeSelf)
		{
			translateScreen.SetActive(false);
			textButtonImage.switchAttribute(false);
		}

		if (dictScreen.activeSelf)
		{
			dictScreen.SetActive(false);
			dictButtonImage.switchAttribute(false);
		}

		if (tutorialScreen.activeSelf)
		{
			tutorialScreen.SetActive(false);
		}

		if (makersScreen.activeSelf)
		{
			makersScreen.SetActive(false);
		}
	}

	public void switchScreen(GameObject screen)
	{
		bool active = screen.activeSelf;

		hideScreen();

		if (active) return;

		screen.SetActive(true);

		if (playerManager.isPlayingIntervalAnimation())
			playerManager.stopAll();

		else if (playerManager.isPlaying())
		{
			playerManager.setPauseState(true);
			setPauseMenuState(true);
		}

		setAvatarColliderState(false);
		randomAnimations.lockFor(LOCK_ID);

		if (screen == infoScreen)
			infoButtonImage.switchAttribute(true);

		if (screen == translateScreen)
			textButtonImage.switchAttribute(true);

		if (screen == dictScreen)
			dictButtonImage.switchAttribute(true);

		exit = false;
	}

	public void switchScreen(string name) {
		switchScreen(getScreenByName(name));
	}

	public GameObject getScreenByName(string name)
	{
		switch (name)
		{
			case "translate": return this.translateScreen;
			case "dict": return this.dictScreen;
			case "info": return this.infoScreen;
			case "tutorial": return this.tutorialScreen;
			case "makers": return this.makersScreen;
		}

		return null;
	}

	public void setPauseMenuState(bool active)
	{
		if (this.pauseMenu.activeSelf != active)
			this.pauseMenu.SetActive(active);
	}

	public void setLoadingSnippetState(bool active)
	{
		this.loadingSnippet.SetActive(active);

		if (active && this.pauseMenu.activeSelf)
			this.pauseMenu.SetActive(false);
	}

	public void showConnectionErrorDialog() {
		this.connectionErrorDialog.SetActive(true);
	}

	public void setAvatarColliderState(bool active) {
		this.avatarCollider.enabled = active;
	}

	public void setRepeatLayerState(bool active) {
		this.repeatLayer.SetActive(active);
	}

}