open-project-1/UOP1_Project/Assets/Scripts/UI/UIManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Localization;

public class UIManager : MonoBehaviour
{
	[Header("Scene UI")]
	[SerializeField]
	private MenuSelectionHandler _selectionHandler = default;
	[SerializeField] private UIPopup _popupPanel = default;

	[SerializeField] private UIDialogueManager _dialogueController = default;

	[SerializeField] private UIInventory _inventoryPanel = default;

	[SerializeField] private UIInteraction _interactionPanel = default;

	[SerializeField] private UIPause _pauseScreen = default;

	[SerializeField] private UISettings _settingScreen = default;

	[Header("Gameplay Components")]
	[SerializeField] private GameStateSO _gameState = default;
	[SerializeField] private MenuSO _mainMenu = default;
	[SerializeField] private InputReader _inputReader = default;

	[Header("Listening on channels")]

	[SerializeField] private VoidEventChannelSO _onSceneReady = default;

	[Header("Dialogue Events")]
	[SerializeField] private DialogueLineChannelSO _openUIDialogueEvent = default;
	[SerializeField] private VoidEventChannelSO _closeUIDialogueEvent = default;

	[Header("Inventory Events")]
	[SerializeField] private VoidEventChannelSO _openInventoryScreenForCookingEvent = default;
	[Header("Interaction Events")]
	[SerializeField] private InteractionUIEventChannelSO _setInteractionEvent = default;

	[Header("Broadcasting on ")]
	[SerializeField] private LoadEventChannelSO _loadMenuEvent = default;
	[SerializeField] private VoidEventChannelSO _onInteractionEndedEvent = default;


	bool isForCooking = false;

	private void Start()
	{
		_onSceneReady.OnEventRaised += ResetUI;
		_openUIDialogueEvent.OnEventRaised += OpenUIDialogue;
		_closeUIDialogueEvent.OnEventRaised += CloseUIDialogue;
		_inputReader.menuPauseEvent += OpenUIPause; // subscription to open Pause UI event happens in OnEnabled, but the close Event is only subscribed to when the popup is open

		_openInventoryScreenForCookingEvent.OnEventRaised += SetInventoryScreenForCooking;
		_setInteractionEvent.OnEventRaised += SetInteractionPanel;

		_inputReader.openInventoryEvent += SetInventoryScreen;
		_inventoryPanel.Closed += CloseInventoryScreen;




	}
	void ResetUI()
	{
		_dialogueController.gameObject.SetActive(false);

		_inventoryPanel.gameObject.SetActive(false);

		_pauseScreen.gameObject.SetActive(false);

		_interactionPanel.gameObject.SetActive(false);

		_inputReader.EnableGameplayInput();

		Time.timeScale = 1;

	}
	void OpenUIDialogue(LocalizedString dialogueLine, ActorSO actor)
	{
		_dialogueController.SetDialogue(dialogueLine, actor);
		_dialogueController.gameObject.SetActive(true);
	}
	void CloseUIDialogue()
	{
		_selectionHandler.Unselect();
		_dialogueController.gameObject.SetActive(false);
	}

	private void OnDestroy()
	{
		//Check if the event exists to avoid errors

		_onSceneReady.OnEventRaised -= ResetUI;
		_openUIDialogueEvent.OnEventRaised -= OpenUIDialogue;
		_closeUIDialogueEvent.OnEventRaised -= CloseUIDialogue;

		_inputReader.menuPauseEvent -= OpenUIPause;

		_openInventoryScreenForCookingEvent.OnEventRaised -= SetInventoryScreenForCooking;
		_setInteractionEvent.OnEventRaised -= SetInteractionPanel;
		_inputReader.openInventoryEvent -= SetInventoryScreen;

		_inventoryPanel.Closed -= CloseInventoryScreen;

	}
	void OpenUIPause()
	{

		_inputReader.menuPauseEvent -= OpenUIPause; // you can open UI pause menu again, if it's closed

		//	Time.timeScale = 0; // Pause time

		_pauseScreen.SettingsScreenOpened += OpenSettingScreen;//once the UI Pause popup is open, listen to open Settings 
		_pauseScreen.BackToMainRequested += ShowBackToMenuConfirmationPopup;//once the UI Pause popup is open, listen to back to menu button
		_pauseScreen.Resumed += CloseUIPause;//once the UI Pause popup is open, listen to unpause event


		_pauseScreen.gameObject.SetActive(true);

		_inputReader.EnableMenuInput();
		_gameState.UpdateGameState(GameState.Pause);
	}

	void CloseUIPause()
	{
		Time.timeScale = 1; // unpause time

		_inputReader.menuPauseEvent += OpenUIPause; // you can open UI pause menu again, if it's closed

		// once the popup is closed, you can't listen to the following events 
		_pauseScreen.SettingsScreenOpened -= OpenSettingScreen;//once the UI Pause popup is open, listen to open Settings 
		_pauseScreen.BackToMainRequested -= ShowBackToMenuConfirmationPopup;//once the UI Pause popup is open, listen to back to menu button
		_pauseScreen.Resumed -= CloseUIPause;//once the UI Pause popup is open, listen to unpause event

		_pauseScreen.gameObject.SetActive(false);

		_inputReader.EnableGameplayInput();
		_selectionHandler.Unselect();
		_gameState.ResetToPreviousGameState();
	}

	void OpenSettingScreen()
	{

		_settingScreen.Closed += CloseSettingScreen; // sub to close setting event with event 

		_pauseScreen.gameObject.SetActive(false); // Set pause screen to inactive

		_settingScreen.gameObject.SetActive(true);// set Setting screen to active 

		// time is still set to 0 and Input is still set to menuInput 

	}

	void CloseSettingScreen()
	{
		//unsub from close setting events 
		_settingScreen.Closed -= CloseSettingScreen;

		_selectionHandler.Unselect();
		_pauseScreen.gameObject.SetActive(true); // Set pause screen to inactive

		_settingScreen.gameObject.SetActive(false);

		// time is still set to 0 and Input is still set to menuInput 
		//going out from setting screen gets us back to the pause screen
	}


	void ShowBackToMenuConfirmationPopup()
	{

		_pauseScreen.gameObject.SetActive(false); // Set pause screen to inactive

		_popupPanel.ClosePopupAction += HideBackToMenuConfirmationPopup;

		_popupPanel.ConfirmationResponseAction += BackToMainMenu;

		_inputReader.EnableMenuInput();
		_popupPanel.gameObject.SetActive(true);
		_popupPanel.SetPopup(PopupType.BackToMenu);

	}

	void BackToMainMenu(bool confirm)
	{

		HideBackToMenuConfirmationPopup();// hide confirmation screen, show close UI pause, 


		if (confirm)

		{
			CloseUIPause();//close ui pause to unsub from all events 
			_loadMenuEvent.RaiseEvent(_mainMenu, false); //load main menu
		}

	}
	void HideBackToMenuConfirmationPopup()
	{
		_popupPanel.ClosePopupAction -= HideBackToMenuConfirmationPopup;
		_popupPanel.ConfirmationResponseAction -= BackToMainMenu;

		_popupPanel.gameObject.SetActive(false);
		_selectionHandler.Unselect();
		_pauseScreen.gameObject.SetActive(true); // Set pause screen to inactive

		// time is still set to 0 and Input is still set to menuInput 
		//going out from confirmaiton popup screen gets us back to the pause screen


	}
	void SetInventoryScreenForCooking()
	{
		isForCooking = true;
		OpenInventoryScreen();

	}
	void SetInventoryScreen()
	{
		isForCooking = false;
		OpenInventoryScreen();

	}
	void OpenInventoryScreen()
	{
		_inputReader.menuPauseEvent -= OpenUIPause; // you cant open the UI Pause again when you are in inventory  
		_inputReader.menuUnpauseEvent -= CloseUIPause; // you can close the UI Pause popup when you are in inventory 

		_inputReader.menuCloseEvent += CloseInventoryScreen;

		_inputReader.closeInventoryEvent += CloseInventoryScreen;
		if (isForCooking)
		{
			_inventoryPanel.FillInventory(InventoryTabType.Recipe, true);

		}
		else
		{
			_inventoryPanel.FillInventory();
		}

		_inventoryPanel.gameObject.SetActive(true);

		_inputReader.EnableMenuInput();

		_gameState.UpdateGameState(GameState.Inventory);
	}
	void CloseInventoryScreen()
	{

		_inputReader.menuPauseEvent += OpenUIPause; // you cant open the UI Pause again when you are in inventory  

		_inputReader.menuCloseEvent -= CloseInventoryScreen;
		_inputReader.closeInventoryEvent -= CloseInventoryScreen;


		_inventoryPanel.gameObject.SetActive(false);

		if (isForCooking)
		{
			_onInteractionEndedEvent.RaiseEvent();

		}
		_selectionHandler.Unselect();
		_inputReader.EnableGameplayInput();
		_gameState.ResetToPreviousGameState();
	}


	void SetInteractionPanel(bool isOpenEvent, InteractionType interactionType)
	{
		if (isOpenEvent)
		{
			_interactionPanel.FillInteractionPanel(interactionType);
		}
		_interactionPanel.gameObject.SetActive(isOpenEvent);

	}


}