package ch.zhaw.gartenverwaltung;

import ch.zhaw.gartenverwaltung.bootstrap.AfterInject;
import ch.zhaw.gartenverwaltung.bootstrap.AppLoader;
import ch.zhaw.gartenverwaltung.bootstrap.ChangeViewEvent;
import ch.zhaw.gartenverwaltung.bootstrap.Inject;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.Pane;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

public class MainFXMLController {
    private static final Logger LOG = Logger.getLogger(MainFXMLController.class.getName());

    @Inject
    AppLoader appLoader;

    @FXML
    private Button home_button;

    @FXML
    private AnchorPane mainPane;

    @FXML
    private Button myGarden_button;

    @FXML
    private Button mySchedule_button;

    @FXML
    private Button plants_button;

    @FXML
    void goToHome() {
        showPaneAsMainView("Home.fxml");
        styleChangeButton(home_button);
    }

    @FXML
    void goToMyPlants() {
        showPaneAsMainView("MyGarden.fxml");
        styleChangeButton(myGarden_button);
    }

    @FXML
    void goToMySchedule() {
        showPaneAsMainView("MySchedule.fxml");
        styleChangeButton(mySchedule_button);
    }

    @FXML
    void goToPlants() {
        showPaneAsMainView("Plants.fxml");
        styleChangeButton(plants_button);
    }

    /**
     * Updates the mainPane with the selected fxml file.
     * set HGrow and VGrow to parent AnchorPane.
     * Sends MainController to other Controllers.
     * @param fxmlFile string of fxml file
     */
    public void showPaneAsMainView(String fxmlFile) {
        try {
            Pane anchorPane = appLoader.loadPane(fxmlFile);
            mainPane.getChildren().setAll(anchorPane);
            anchorPane.prefWidthProperty().bind(mainPane.widthProperty());
            anchorPane.prefHeightProperty().bind(mainPane.heightProperty());

            anchorPane.removeEventHandler(ChangeViewEvent.CHANGE_MAIN_VIEW, changeMainViewHandler);
            anchorPane.addEventHandler(ChangeViewEvent.CHANGE_MAIN_VIEW, changeMainViewHandler);
        } catch (IOException e) {
            LOG.log(Level.SEVERE, "Could not load pane.", e);
        }
    }

    private final EventHandler<ChangeViewEvent> changeMainViewHandler = (ChangeViewEvent event) -> showPaneAsMainView(event.view());

    private void preloadPanes() throws IOException {
        appLoader.loadAndCacheFxml("MyGarden.fxml");
        appLoader.loadAndCacheFxml("MySchedule.fxml");
        appLoader.loadAndCacheFxml("Plants.fxml");
    }

    private void styleChangeButton(Button button) {
        //ToDo changeStyle of the menu buttons
    }

    /**
     * loads the default FXML File
     * {@inheritDoc}
     */
    @AfterInject
    @SuppressWarnings("unused")
    public void init() {
        try {
            preloadPanes();
            showPaneAsMainView("Home.fxml");
            styleChangeButton(home_button);
        } catch (IOException e) {
            LOG.log(Level.SEVERE, "Failed to load FXML-Pane!", e);
        }
    }
}