package envoy.client.ui;

import java.util.Optional;
import java.util.logging.Level;
import java.util.logging.Logger;

import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.scene.control.TextField;

import envoy.client.event.SendEvent;
import envoy.data.Contact;
import envoy.event.ElementOperation;
import envoy.event.EventBus;
import envoy.event.contact.ContactOperationEvent;
import envoy.event.contact.ContactSearchRequest;
import envoy.event.contact.ContactSearchResult;
import envoy.util.EnvoyLog;

/**
 * Project: <strong>envoy-client</strong><br>
 * File: <strong>ContactSearchSceneController.java</strong><br>
 * Created: <strong>07.06.2020</strong><br>
 *
 * @author Leon Hofmeister
 * @since Envoy Client v0.1-beta
 */
public class ContactSearchSceneController {

	@FXML
	private Button backButton;

	@FXML
	private Button clearButton;

	@FXML
	private Button searchButton;

	@FXML
	private TextField searchBar;

	@FXML
	private ListView<Contact> contactList;

	private SceneContext sceneContext;

	private static EventBus		eventBus	= EventBus.getInstance();
	private static final Logger	logger		= EnvoyLog.getLogger(ChatSceneController.class);

	/**
	 * @param sceneContext enables the user to return to the chat scene
	 * @since Envoy Client v0.1-beta
	 */
	public void initializeData(SceneContext sceneContext) { this.sceneContext = sceneContext; }

	@FXML
	private void initialize() {
		contactList.setCellFactory(e -> new UserListCell());
		eventBus.register(ContactSearchResult.class, response -> Optional.of(response.get()).ifPresent(list -> contactList.getItems().addAll(list)));
	}

	/**
	 * Disables the clear and search button if no text is present in the search bar.
	 *
	 * @since Envoy Client v0.1-beta
	 */
	@FXML
	private void checkClearButton() {
		final var containsContent = searchBar.getText().strip().isEmpty();
		clearButton.setDisable(containsContent);
		searchButton.setDisable(containsContent);
	}

	/**
	 * Sends a {@link ContactSearchRequest} to the server.
	 *
	 * @since Envoy Client v0.1-beta
	 */
	@FXML
	private void suggestContacts() { eventBus.dispatch(new SendEvent(new ContactSearchRequest(searchBar.getText()))); }

	/**
	 * Clears the text in the search bar and the items shown in the list.
	 * Additionally disables both clear and search button.
	 *
	 * @since Envoy Client v0.1-beta
	 */
	@FXML
	private void clear() {
		searchBar.setText(null);
		contactList.getItems().clear();
		clearButton.setDisable(true);
		searchButton.setDisable(true);
	}

	/**
	 * Sends an {@link ContactOperationEvent} for every selected contact to the
	 * server.
	 *
	 * @since Envoy Client v0.1-beta
	 */
	@FXML
	private void contactListClicked() {
		Optional.ofNullable(contactList.getSelectionModel().getSelectedItems()).ifPresent(contacts -> contacts.forEach(contact -> {
			final var event = new ContactOperationEvent(contact, ElementOperation.ADD);
			// Sends the event to the server
			eventBus.dispatch(new SendEvent(event));
			// Updates the UI
			eventBus.dispatch(event);
			logger.log(Level.INFO, "Added contact " + contact);
		}));
	}

	@FXML
	private void backButtonClicked() { sceneContext.pop(); }
}