using UnityEngine;
using System.Collections;
using UnityEngine.EventSystems;


public enum GameState {
    Gameplay,
    InventoryUI,
    GameOverUI,
    PauseUI
}

public class GameController : MonoBehaviour {
	public HudController hud;
	public GameOverUIController gameOverScreen;
    public InventoryUIController inventoryController;
    public PauseUiController pauseUi;
    private GameState _state;
    private float _tenseState = 100;
    public float _tenseReleaseSpeed = 5;
    private HorizontalProgressBar _tenseBar;
    private UiController _currentUi;
    private UiController _previousUi;
    public AudioClip gameOverClip;

    public GameState State {
        get { return _state; }
    }

    public void OnSuspiciousSound(HumanController source) {
        
    }

    public void OnCanSeePlayer(HumanController source) {
        
    }

    public void ShowUI(UiController ui) {
        if (_currentUi == ui) {
            return;
        }

        _previousUi = _currentUi;

        if (_previousUi != null) {
            _previousUi.gameObject.SetActive(false);
        }
       


        _currentUi = ui;
        if (_currentUi != null) {
            _currentUi.gameObject.SetActive(true);
        }

        if (_currentUi == null || _currentUi == hud || _currentUi == gameOverScreen) {
            Time.timeScale = 1;
        }
        else {
            Time.timeScale = 0;
        }

        if (_currentUi == hud) {
            _state = GameState.Gameplay;
        }
    }

    public void ShowPreviousUi(bool removeCurrentFromHistory = false) {
        ShowUI(_previousUi);
        if (removeCurrentFromHistory) {
            _previousUi = null;
        }
    }

	void Start () {
	    _tenseBar = new HorizontalProgressBar();
        ShowUI(hud);
	}

	public void GameOver(){
        _state = GameState.GameOverUI;
        ShowUI(gameOverScreen);

	    if (gameOverClip != null) {
            AudioSource.PlayClipAtPoint(gameOverClip, Vector3.zero);
	    }
		//hud.gameObject.SetActive(false);
		//gameOverScreen.gameObject.SetActive(true);
	}

    public void PauseGame(bool pause) {
        Time.timeScale = pause ? 0 : 1;
    }

	void Update () {
	    if (_state == GameState.GameOverUI) {
	        return;
	    }
        if (Input.GetKeyDown(KeyCode.I)) {
            var playerController = FindObjectOfType<PlayerController>();

           // bool menuVisible = inventoryController.gameObject.activeInHierarchy;

	        if (_state == GameState.InventoryUI) {
	           // inventoryController.gameObject.SetActive(false);
                _state = GameState.Gameplay;
             //   hud.gameObject.SetActive(true);
                ShowUI(hud);
	           // PauseGame(false);
	        }
	        else if (_state == GameState.Gameplay)  {
               // PauseGame(true);
                inventoryController.inventory = playerController.GetComponent<Inventory>();
                //inventoryController.gameObject.SetActive(true);
                ShowUI(inventoryController);

                inventoryController.Rebuild();
                

                _state = GameState.InventoryUI;
                //hud.gameObject.SetActive(false);
	        }
	    }
        
	    if (Input.GetKeyDown(KeyCode.Escape)) {
	        if (_state != GameState.PauseUI) {
	            ShowUI(pauseUi);
	        }
	        else {
	            ShowPreviousUi();
	        }
	    }
	}
}