package ovh.gasser.newshapes;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ovh.gasser.newshapes.attributes.ColorAttributes;
import ovh.gasser.newshapes.shapes.*;
import ovh.gasser.newshapes.shapes.Shape;
import ovh.gasser.newshapes.ui.ShapesView;
import ovh.gasser.newshapes.ui.listeners.MenuAddListener;
import ovh.gasser.newshapes.ui.listeners.MenuEditListener;

import javax.swing.*;
import java.awt.*;
import java.io.FileNotFoundException;

public class App {
    private final static Logger logger = LoggerFactory.getLogger(App.class);
    public static final Dimension WIN_SIZE = new Dimension(800, 600);
    private SCollection model;
    private JCheckBoxMenuItem editFill;
    private JCheckBoxMenuItem editBorder;

    private App() throws HeadlessException {
        final JFrame frame = new JFrame("Reactive shapes");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        buildModel();

        final ShapesView view = new ShapesView(this.model);
        view.setPreferredSize(WIN_SIZE);
        view.setFocusable(true);
        var res = view.requestFocusInWindow();
        assert res;

        frame.getContentPane().add(view, BorderLayout.CENTER);
        frame.setContentPane(view);
        frame.pack();
        frame.setVisible(true);

        this.buildMenuBar(frame, view);

        view.addSelectionChangeListener(this::updateMenuState);
    }

    private void buildModel() {
        model = SCollection.of(
                STriangle.create(200, 200, 50, Color.YELLOW, Color.BLACK),
                SRectangle.create(10, 10, 40, 60, Color.RED),
                SRectangle.create(70, 10, 40, 60),
                SCollection.of(
                        SRectangle.create(100, 200, 40, 60, Color.MAGENTA),
                        SRectangle.create(150, 200, 40, 60, Color.MAGENTA),
                        SCircle.create(200, 250, 30)
                )
        );
    }

    private void buildMenuBar(JFrame frame, ShapesView sview) {
        var menubar = new JMenuBar();

        // About
        JMenu helpMenu = new JMenu("Help");
        JMenuItem aboutItem = new JMenuItem("About");
        aboutItem.addActionListener(evt -> JOptionPane.showMessageDialog(frame, "This project was created by Alexandre Colicchio and Thibaud Gasser", "About this project", JOptionPane.INFORMATION_MESSAGE));
        helpMenu.add(aboutItem);

        menubar.add(buildFileMenu(sview));
        menubar.add(buildEditMenu(sview));
        menubar.add(helpMenu);
        frame.setJMenuBar(menubar);
    }

    private JMenu buildFileMenu(ShapesView sview) {
        JMenu menuFile = new JMenu("File");
        JMenuItem addRectItem = new JMenuItem("Add SRectangle");
        JMenuItem addCircleItem = new JMenuItem("Add SCircle");
        JMenuItem addTextItem = new JMenuItem("Add Text");
        JMenuItem htmlExportItem = new JMenuItem("Export to HTML");
        JMenuItem svgExportItem = new JMenuItem("Export to SVG");
        JMenuItem exitItem = new JMenuItem("Exit");
        addRectItem.addActionListener(new MenuAddListener("SRectangle", model, sview));
        addCircleItem.addActionListener(new MenuAddListener("SCircle", model, sview));
        addTextItem.addActionListener(evt -> sview.getController().enterTextMode());
        htmlExportItem.addActionListener(evt -> {
            try {
                new HTMLExporter(model).export();
            } catch (FileNotFoundException e) {
                logger.error("Could not export as html: {}", e.getMessage());
            }
        });
        svgExportItem.addActionListener(evt -> {
            try {
                new SVGExporter(model).export();
            } catch (FileNotFoundException e) {
                logger.error("Could not export as html: {}", e.getMessage());
            }
        });
        exitItem.addActionListener(evt -> System.exit(0));
        menuFile.add(addRectItem);
        menuFile.add(addCircleItem);
        menuFile.add(addTextItem);
        menuFile.addSeparator();
        menuFile.add(htmlExportItem);
        menuFile.add(svgExportItem);
        menuFile.add(exitItem);
        return menuFile;
    }

    private JMenu buildEditMenu(ShapesView sview) {
        MenuEditListener editListener = new MenuEditListener(model, sview, sview.getController());
        JMenu menuEdit = new JMenu("Edit");
        JMenuItem editColor = new JMenuItem("Change color");
        JMenuItem editBorderColor = new JMenuItem("Change border color");
        JMenuItem deleteItem = new JMenuItem("Delete");
        editFill = new JCheckBoxMenuItem("Fill Shape");
        editBorder = new JCheckBoxMenuItem("Draw border");
        editColor.addActionListener(editListener);
        editBorderColor.addActionListener(editListener);
        deleteItem.addActionListener(editListener);
        editFill.addActionListener(editListener);
        editBorder.addActionListener(editListener);

        menuEdit.add(editColor);
        menuEdit.add(editBorderColor);
        menuEdit.add(deleteItem);
        menuEdit.addSeparator();
        menuEdit.add(editBorder);
        menuEdit.add(editFill);
        return menuEdit;
    }

    private void updateMenuState(Iterable<Shape> selectedShapes) {
        boolean hasToggleableShapes = false;
        boolean allFilled = true;
        boolean allStroked = true;

        for (Shape s : selectedShapes) {
            if (s instanceof SText) {
                continue;
            }
            ColorAttributes attrs = (ColorAttributes) s.getAttributes(ColorAttributes.ID);
            if (attrs != null) {
                hasToggleableShapes = true;
                allFilled = allFilled && attrs.filled;
                allStroked = allStroked && attrs.stroked;
            }
        }

        updateMenuItem(editFill, hasToggleableShapes, allFilled);
        updateMenuItem(editBorder, hasToggleableShapes, allStroked);
    }

    private void updateMenuItem(JCheckBoxMenuItem menuItem, boolean hasAttributes, boolean allSelected) {
        if (!hasAttributes) {
            menuItem.setSelected(false);
            menuItem.setEnabled(false);
        } else {
            menuItem.setSelected(allSelected);
            menuItem.setEnabled(true);
        }
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(App::new);
    }

}