package de.uniluebeck.mi.projmi6.controller;

import de.uniluebeck.mi.projmi6.model.HL7Message;
import de.uniluebeck.mi.projmi6.view.MessageIcon;
import javafx.beans.property.SimpleListProperty;
import javafx.collections.FXCollections;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.stage.Modality;
import javafx.stage.Stage;

import java.io.IOException;

/**
 * This controller controlls the small message icon at the bottom of the application's main window.
 * @author Johannes
 */
public class MessageController {
    /**
     * The superior controller
     */
    final MainController mainController;

    /**
     * The list of unread messages
     */
    private final SimpleListProperty<HL7Message> messages = new SimpleListProperty<>(FXCollections.observableArrayList());

    /**
     * The view that is mantained by this controller
     */
    @FXML
    private MessageIcon messageIcon;

    /**
     * Constructor
     * @param mainController The controller that creates this instance
     */
    public MessageController(MainController mainController) {
        this.mainController = mainController;
    }

    /**
     * FXMLLoaders initialize()-method
     */
    @FXML
    private void initialize() {
        messageIcon.messageCountProperty().bind(messages.sizeProperty());
    }

    /**
     * EventHandler for the {@link #messageIcon}.
     */
    @FXML
    private void onMessageIconClicked() {
        showMessageList();
    }

    /**
     * Opens a window that shows all the unread messages.
     * @see de.uniluebeck.mi.projmi6.controller.MessageListController
     */
    private void showMessageList() {
        //Load the window content from FXML
        FXMLLoader fxmlLoader = new FXMLLoader();
        fxmlLoader.setLocation(getClass().getClassLoader().getResource("message_list.fxml"));

        //Non-empty constructor of the controller class
        MessageListController messageListController = new MessageListController(messages, mainController);
        fxmlLoader.setControllerFactory(clazz -> messageListController);

        Parent root = null;
        try {
            root = fxmlLoader.load();
        } catch (IOException e) {
            e.printStackTrace();
            return;
        }

        //Create stage and open window.
        Stage stage = new Stage();

        stage.setTitle("Neue HL7-Nachrichten");
        stage.setScene(new Scene(root, 600, 400));

        stage.getIcons().add(new Image("icon.png"));
        stage.initModality(Modality.WINDOW_MODAL);
        stage.initOwner(messageIcon.getScene().getWindow());
        stage.show();
    }

    /**
     * Adds a message to the list of unread messages that is controlled by this controller
     * @param message The message that will be added.
     */
    public void addMessage(HL7Message message) {
        messages.add(message);
        mainController.getLogController().refreshLogFromDb();
    }

}