import javax.swing.JOptionPane;

/**
 * EntryDialog is used to view, add or update entry details.
 * @author Lars Appel
 * @version 0.2
 */
public class EntryDialog extends javax.swing.JDialog {

  /** Initializes the Form */
  public EntryDialog(java.awt.Frame parent, boolean modal) {
    super (parent, modal);
    initComponents ();
    pack ();
  }

  /**
  * The dataset this dialog is to interact with.
  */
  MasterSet myMaster;

  /**
  * In add mode we make the keyValue read only.
  */
  boolean addMode;

  /**
  * In modify mode we need the row for updating the list view.
  */
  int myRow;

  /**
  * This customized contructor is used by the application.
  */
  public EntryDialog(
    java.awt.Frame parent, boolean modal, MasterSet master, boolean addMode
  ) {
    super (parent, modal);
    initComponents ();
    myMaster = master;
    this.addMode = addMode;
    initGridComponents();
    pack ();
    setLocationRelativeTo(parent);
  }

  // keep track of the field name/value pairs of an entry

  javax.swing.JLabel[]     gridLabels;
  javax.swing.JTextField[] gridFields;

  /**
  * Builds the entry labels and input fields dynamically.
  */
  private void initGridComponents() {
    String[] fields = myMaster.getFieldNames();
    int[] widths = myMaster.getFieldWidths();

    java.awt.GridBagConstraints myConstraints
      = new java.awt.GridBagConstraints ();

    gridLabels = new javax.swing.JLabel[fields.length];
    gridFields = new javax.swing.JTextField[fields.length];

    for (int k=0; k < fields.length; k++) {
      // add the label
      gridLabels[k] = new javax.swing.JLabel(fields[k]);
      myConstraints.gridwidth = 1;
      myConstraints.anchor = java.awt.GridBagConstraints.CENTER;
      gridPanel.add (gridLabels[k], myConstraints);
      // add the field
      gridFields[k] = new javax.swing.JTextField(widths[k]);
      myConstraints.gridwidth = java.awt.GridBagConstraints.REMAINDER;
      myConstraints.anchor = java.awt.GridBagConstraints.WEST;
      gridPanel.add (gridFields[k], myConstraints);
    }

    if (!addMode) gridFields[0].setEditable(false);
  }

  /**
  * Retrieve an entry from the dataset and populate the GUI fields.
  */
  void fetchData(int row, String keyValue) {
    myRow = row; // remember in case of update
    String[] tuple = myMaster.fetchData(keyValue);
    for (int k=0; k < gridFields.length; k++) {
      gridFields[k].setText(tuple[k]);
    }
  }

  /**
  * Add an entry based on the GUI field contents, show error msg if any.
  */
  void addEntry() {
    String[] tuple = new String[gridFields.length];
    for (int k=0; k < tuple.length; k++) tuple[k] = gridFields[k].getText();
    String msg = myMaster.addEntry(tuple);
    if (msg != null) JOptionPane.showMessageDialog(null, msg);
  }

  /**
  * Update dataset entry based on the GUI fields or show error msg.
  */
  void updateEntry() {
    String[] tuple = new String[gridFields.length];
    for (int k=0; k < tuple.length; k++) tuple[k] = gridFields[k].getText();
    String msg = myMaster.updateEntry(myRow, tuple);
    if (msg != null) JOptionPane.showMessageDialog(null, msg);
  }

  /** This method is called from within the constructor to
   * initialize the form.
   * WARNING: Do NOT modify this code. The content of this method is
   * always regenerated by the FormEditor.
   */
  private void initComponents () {//GEN-BEGIN:initComponents
    setTitle ("Entry Details");
    addWindowListener (new java.awt.event.WindowAdapter () {
        public void windowClosing (java.awt.event.WindowEvent evt) {
          closeDialog (evt);
        }
      }
    );
    getContentPane ().setLayout (new java.awt.BorderLayout ());

    bottomPanel = new javax.swing.JPanel ();
    bottomPanel.setLayout (new java.awt.FlowLayout ());

      saveButton = new javax.swing.JButton ();
      saveButton.setText ("Save");
      saveButton.addActionListener (new java.awt.event.ActionListener () {
          public void actionPerformed (java.awt.event.ActionEvent evt) {
            saveButtonActionPerformed (evt);
          }
        }
      );
      bottomPanel.add (saveButton);

      closeButton = new javax.swing.JButton ();
      closeButton.setText ("Close");
      closeButton.addActionListener (new java.awt.event.ActionListener () {
          public void actionPerformed (java.awt.event.ActionEvent evt) {
            closeButtonActionPerformed (evt);
          }
        }
      );
      bottomPanel.add (closeButton);

    getContentPane ().add (bottomPanel, "South");

    gridPanel = new javax.swing.JPanel ();
    gridPanel.setLayout (new java.awt.GridBagLayout ());
    java.awt.GridBagConstraints gridBagConstraints1;

    getContentPane ().add (gridPanel, "Center");

  }//GEN-END:initComponents

  private void closeButtonActionPerformed (java.awt.event.ActionEvent evt) {//GEN-FIRST:event_closeButtonActionPerformed
    // Add your handling code here:
    setVisible (false);
    // dispose (); -- maybe we can reuse the dialog (eg screen position)
  }//GEN-LAST:event_closeButtonActionPerformed

  private void saveButtonActionPerformed (java.awt.event.ActionEvent evt) {//GEN-FIRST:event_saveButtonActionPerformed
    // Add your handling code here:
    if (addMode) addEntry(); else updateEntry();
    setVisible (false);
    // dispose (); -- maybe we can reuse the dialog (eg screen position)
  }//GEN-LAST:event_saveButtonActionPerformed

  /** Closes the dialog */
  private void closeDialog(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_closeDialog
    setVisible (false);
    // dispose (); -- maybe we can reuse the dialog (eg screen position)
  }//GEN-LAST:event_closeDialog


// Variables declaration - do not modify//GEN-BEGIN:variables
  private javax.swing.JPanel bottomPanel;
  private javax.swing.JPanel gridPanel;
  private javax.swing.JButton saveButton;
  private javax.swing.JButton closeButton;
// End of variables declaration//GEN-END:variables


  public static void main(java.lang.String[] args) {
    new EntryDialog (new java.awt.Frame (), false).show ();
  }

}