/*
 * The MIT License
 * Copyright © 2014-2019 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.iluwatar.model.view.presenter;

import static javax.swing.ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
import static javax.swing.ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

/**
 * This class is the GUI implementation of the View component in the Model-View-Presenter pattern.
 */
public class FileSelectorJFrame extends JFrame implements FileSelectorView, ActionListener {

  /**
   * Default serial version ID.
   */
  private static final long serialVersionUID = 1L;

  /**
   * The "OK" button for loading the file.
   */
  private final JButton ok;

  /**
   * The cancel button.
   */
  private final JButton cancel;

  /**
   * The text field for giving the name of the file that we want to open.
   */
  private final JTextField input;

  /**
   * A text area that will keep the contents of the file opened.
   */
  private final JTextArea area;

  /**
   * The Presenter component that the frame will interact with.
   */
  private FileSelectorPresenter presenter;

  /**
   * The name of the file that we want to read it's contents.
   */
  private String fileName;

  /**
   * Constructor.
   */
  public FileSelectorJFrame() {
    super("File Loader");
    this.setDefaultCloseOperation(EXIT_ON_CLOSE);
    this.setLayout(null);
    this.setBounds(100, 100, 500, 200);

    /*
     * Add the panel.
     */
    var panel = new JPanel();
    panel.setLayout(null);
    this.add(panel);
    panel.setBounds(0, 0, 500, 200);
    panel.setBackground(Color.LIGHT_GRAY);

    /*
     * Add the info label.
     */
    var info = new JLabel("File Name :");
    panel.add(info);
    info.setBounds(30, 10, 100, 30);

    /*
     * Add the contents label.
     */
    var contents = new JLabel("File contents :");
    panel.add(contents);
    contents.setBounds(30, 100, 120, 30);

    /*
     * Add the text field.
     */
    this.input = new JTextField(100);
    panel.add(input);
    this.input.setBounds(150, 15, 200, 20);

    /*
     * Add the text area.
     */
    this.area = new JTextArea(100, 100);
    var pane = new JScrollPane(area);
    pane.setHorizontalScrollBarPolicy(HORIZONTAL_SCROLLBAR_AS_NEEDED);
    pane.setVerticalScrollBarPolicy(VERTICAL_SCROLLBAR_AS_NEEDED);
    panel.add(pane);
    this.area.setEditable(false);
    pane.setBounds(150, 100, 250, 80);

    /*
     * Add the OK button.
     */
    this.ok = new JButton("OK");
    panel.add(ok);
    this.ok.setBounds(250, 50, 100, 25);
    this.ok.addActionListener(this);

    /*
     * Add the cancel button.
     */
    this.cancel = new JButton("Cancel");
    panel.add(this.cancel);
    this.cancel.setBounds(380, 50, 100, 25);
    this.cancel.addActionListener(this);

    this.presenter = null;
    this.fileName = null;
  }

  @Override
  public void actionPerformed(ActionEvent e) {
    if (this.ok.equals(e.getSource())) {
      this.fileName = this.input.getText();
      presenter.fileNameChanged();
      presenter.confirmed();
    } else if (this.cancel.equals(e.getSource())) {
      presenter.cancelled();
    }
  }

  @Override
  public void open() {
    this.setVisible(true);
  }

  @Override
  public void close() {
    this.dispose();
  }

  @Override
  public boolean isOpened() {
    return this.isVisible();
  }

  @Override
  public void setPresenter(FileSelectorPresenter presenter) {
    this.presenter = presenter;
  }

  @Override
  public FileSelectorPresenter getPresenter() {
    return this.presenter;
  }

  @Override
  public void setFileName(String name) {
    this.fileName = name;
  }

  @Override
  public String getFileName() {
    return this.fileName;
  }

  @Override
  public void showMessage(String message) {
    JOptionPane.showMessageDialog(null, message);
  }

  @Override
  public void displayData(String data) {
    this.area.setText(data);
  }
}
