package dasherJava.gui;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.util.Collections;
import java.util.List;

import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import javax.swing.ScrollPaneConstants;
import javax.swing.WindowConstants;

import dasherJava.DasherJava;
import dasherJava.core.settings.Settings;

public class SettingsConfigurationChooser extends DefaultLocationJFrame {
	
	public SettingsConfigurationChooser(List<String> configurations) {
		super("DasherJava "+DasherJava.VERSION_STRING);
		setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
		addWindowListener(new WindowAdapter() {
			@Override
			public void windowClosing(WindowEvent e) {
				DasherJava.doExit(false);
			}
		});
		setLayout(new BorderLayout());
		JLabel chooseLabel = new JLabel("Choose a configuration (can also be specified as command line argument):");
		chooseLabel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
		add(chooseLabel, BorderLayout.PAGE_START);
		DefaultListModel<String> listModel = new DefaultListModel<>();
		listModel.addAll(configurations);
		sortListModel(listModel);
		JList<String> list = new JList<>(listModel);
		list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		JScrollPane scrollPane = new JScrollPane(list, ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
				ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		JPanel scrollPanePanel = new JPanel(new BorderLayout());
		scrollPanePanel.setBorder(BorderFactory.createEmptyBorder(0, 5, 0, 5));
		scrollPanePanel.add(scrollPane, BorderLayout.CENTER);
		add(scrollPanePanel, BorderLayout.CENTER);
		JPanel buttonsPanel = new JPanel(null);
		buttonsPanel.setLayout(new BoxLayout(buttonsPanel, BoxLayout.LINE_AXIS));
		buttonsPanel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
		JButton newButton = new JButton("New");
		newButton.addActionListener(e -> {
			String newName = (String) JOptionPane.showInputDialog(this, "Enter name of new configuration:",
					"Create New Configuration", JOptionPane.QUESTION_MESSAGE, null, null, "New Configuration");
			if (newName==null) return; //canceled by user
			try {
				DasherJava.writeSettingsFile(newName, Settings.DEFAULT_SETTINGS, true);
				listModel.addElement(newName);
				sortListModel(listModel);
			} catch (IOException ex) {
				DasherJava.showErrorMessage(this, ex);
			}
		});
		buttonsPanel.add(newButton);
		buttonsPanel.add(Box.createRigidArea(new Dimension(5, 0)));
		JButton duplicateButton = new JButton("Duplicate");
		duplicateButton.addActionListener(e -> {
			String configurationName = list.getSelectedValue();
			if (configurationName==null) return; //nothing selected, cannot duplicate
			String newName = (String) JOptionPane.showInputDialog(this, "Enter name of duplicated configuration:",
					"Duplicate Configuration", JOptionPane.QUESTION_MESSAGE, null, null, configurationName);
			if (newName==null) return; //canceled by user
			try {
				DasherJava.duplicateSettingsFile(configurationName, newName);
				listModel.addElement(newName);
				sortListModel(listModel);
			} catch (IOException ex) {
				DasherJava.showErrorMessage(this, ex);
			}
		});
		buttonsPanel.add(duplicateButton);
		buttonsPanel.add(Box.createRigidArea(new Dimension(5, 0)));
		JButton renameButton = new JButton("Rename");
		renameButton.addActionListener(e -> {
			String configurationName = list.getSelectedValue();
			if (configurationName==null) return; //nothing selected, cannot rename
			String newName = (String) JOptionPane.showInputDialog(this, "Enter new name of configuration:",
					"Rename Configuration", JOptionPane.QUESTION_MESSAGE, null, null, configurationName);
			if (newName==null) return; //canceled by user
			try {
				DasherJava.renameSettingsFile(configurationName, newName);
				listModel.removeElement(configurationName);
				listModel.addElement(newName);
				sortListModel(listModel);
			} catch (IOException ex) {
				DasherJava.showErrorMessage(this, ex);
			}
		});
		buttonsPanel.add(renameButton);
		buttonsPanel.add(Box.createRigidArea(new Dimension(5, 0)));
		JButton deleteButton = new JButton("Delete");
		deleteButton.addActionListener(e -> {
			String configurationName = list.getSelectedValue();
			if (configurationName==null) return; //nothing selected, cannot delete
			if (JOptionPane.showConfirmDialog(this, "Delete configuration \""+configurationName+"\"?",
					"Delete Configuration", JOptionPane.OK_CANCEL_OPTION)!=JOptionPane.OK_OPTION)
				return; //canceled by user
			try {
				DasherJava.deleteSettingsFile(configurationName);
				listModel.removeElement(configurationName);
			} catch (IOException ex) {
				DasherJava.showErrorMessage(this, ex);
			}
		});
		buttonsPanel.add(deleteButton);
		buttonsPanel.add(Box.createRigidArea(new Dimension(5, 0)));
		buttonsPanel.add(Box.createHorizontalGlue());
		JButton okButton = new JButton("OK");
		okButton.addActionListener(e -> {
			String configurationName = list.getSelectedValue();
			if (configurationName==null) return;
			try {
				DasherJava.initWithSettings(configurationName);
				setVisible(false);
			} catch (IOException ex) {
				DasherJava.showErrorMessage(this, ex);
			}
		});
		buttonsPanel.add(okButton);
		add(buttonsPanel, BorderLayout.PAGE_END);
		setSize(500, 400);
	}
	
	private static void sortListModel(DefaultListModel<String> listModel) {
		List<String> list = Collections.list(listModel.elements());
		list.sort(String.CASE_INSENSITIVE_ORDER);
		listModel.clear();
		listModel.addAll(list);
	}
}