/*
 * MailServerInfoComponent.java
 *
 * Created on den 25 september 2001, 22:34
 */

package ip1.u9;

import ip1.u7.b.*;
import javax.swing.event.EventListenerList;
import javax.swing.DefaultComboBoxModel;
import java.io.*;

/** Komponent för att visa upp och hantera konton.
 *
 * @author  Henrik Johansson, DS80
 * @version ht2001
 */
public class MailServerInfoComponent extends javax.swing.JPanel implements ServerInfoPanel {
    private EventListenerList serverInfoChangeListener = null;
    private boolean changed = false;

    /** Skapar en ny MailServerInfoComponent */
    public MailServerInfoComponent() {
        serverInfoChangeListener = new EventListenerList();
        initComponents();
    }
     
    /** Låter Lyssnarklasser säga upp prenumerationen på de ServerInfoChangeEvents som komponenten producerar.
     *
     * @param listener Lyssnarklassen som säger upp prenumerationen.
     */
    public void removeServerInfoChangeListener(ServerInfoChangeListener listener) {
        serverInfoChangeListener.remove(MessageChosenListener.class, listener);
    }    

    /** Skickar ServerInfoChangeEvents till eventuella prenumeranter.
     *
     * @param evt det ServerInfoChangeEvent som skall skickas.
     */
    public void fireServerInfoChangeListener(ServerInfoChangeEvent evt) {
        Object[] listeners = serverInfoChangeListener.getListenerList();
        int numListeners = listeners.length;
        for(int i = 0; i < numListeners; i++) {
            if (listeners[i] == ServerInfoChangeListener.class) {
                ((ServerInfoChangeListener)listeners[i + 1]).dispatchServerInfoChange(evt);
            }            
        }
    }    

    /** Låter Lyssnarklasser prenumerera på de ServerInfoChangeEvents som komponenten producerar.
     *
     * @param listener Lyssnarklassen som prenumererar.
     */
    public void addServerInfoChangeListener(ServerInfoChangeListener listener) {
        serverInfoChangeListener.add(ServerInfoChangeListener.class, listener);
    }
    
    /** Sätter kontrollklassen.
     *
     *@param controller Kontrollklassen
     */
    public void setController(MailReceiverGUI controller) {
    }
    
    /** Anropas av komponentens kontrollklass vid uppstart. Om det finns någon kontoinformation
     * sparad i det bibliotek varifrån MailClient-applikationen startades (lagras i en fil
     * kallad MailClientAccounts.mca) läses denna in av komponenten, annars öppnas en 
     * ServerInfoDialog, för att konfigurera ett nytt konto.
     */
    public void start() {
        try {
            File file = new File("./MailClientAccounts.mca");
            if(file.exists()) {
                FileInputStream fis = new FileInputStream(file);
                ObjectInputStream ois = new ObjectInputStream(fis);
                serverInfo.setModel((DefaultComboBoxModel) ois.readObject());
                ois.close();
                fis.close();
            } else {
                createNewAccount(false);
            }
        } catch(FileNotFoundException e) {
            System.err.println(e.getMessage());
        } catch(IOException e) {
            System.err.println(e.getMessage());
        } catch(ClassNotFoundException e) {
            System.err.println(e.getMessage());
        }
    }
    
    /** Anropas av komponentens kontrollklass när programmet avslutas. Om det skett någon
     * förändring i kontonas status (konton har ändrats, lagts till eller tagits bort) sparas
     * kontona till hårddisken( i filen MailClientAccounts.mca)
     */
    public void stop() {
        if(changed) {
            try {
                File file = new File("./MailClientAccounts.mca");
                if(! file.exists())
                    file.createNewFile();
                FileOutputStream fos = new FileOutputStream(file);
                ObjectOutputStream oos = new ObjectOutputStream(fos);
                oos.writeObject(serverInfo.getModel());
                oos.close();
                fos.close();
            } catch(FileNotFoundException e) {
                System.err.println(e.getMessage());
            } catch(IOException e) {
                System.err.println(e.getMessage());
            }
        }
    }
    
    /** Skapar ett nytt eller uppdaterar ett redan existerande konto. Om ett nytt konto skapats 
     * läggs det till i den JComboBox som håller konton, annars uppdateras det redan existerande
     * kontot.
     *
     *@param update om true uppdateras det av användaren valda kontot, annars skapas ett nytt konto.
     */
    protected void createNewAccount(boolean update) {
        changed = true;
        DefaultComboBoxModel model = (DefaultComboBoxModel) serverInfo.getModel();
        ServerInfoDialog dialog = null;
        if(update) {
            ServerInfo si = (ServerInfo) serverInfo.getSelectedItem();
            dialog = new ServerInfoDialog(null, si, model);
        } else
            dialog = new ServerInfoDialog(null, model);
        dialog.show();
        switch(dialog.getResult()) {
            case ServerInfoDialog.NEW: { //Ett nytt konto har skapats
                ((DefaultComboBoxModel) serverInfo.getModel()).addElement(dialog.getServerInfo());
                break;
            } case ServerInfoDialog.UPDATE: { // Ett redan existerande konto har uppdaterats
                ((ServerInfo) serverInfo.getSelectedItem()).update(dialog.getServerInfo());
                serverInfo.updateUI();
                break;
            } case ServerInfoDialog.SERVER_UPDATE:{         // Ett redan existerande konto har uppdaterats med en
                int index = serverInfo.getSelectedIndex();  // ny mailserver. ServerInfoChangeEvent måste skapas
                DefaultComboBoxModel mdl = (DefaultComboBoxModel) serverInfo.getModel();
                mdl.removeElementAt(index);
                mdl.insertElementAt(dialog.getServerInfo(), index); //Genom att ta bort och lägga till provoseras ett
                serverInfo.setModel(mdl);                           //ServerInfoChangeEvent fram
                serverInfo.setSelectedIndex(index);
            }
        }                
    }
    
    /** 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 Form Editor.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        serverInfo = new javax.swing.JComboBox();
        deleteAccount = new javax.swing.JButton();
        jPanel1 = new javax.swing.JPanel();
        newAccount = new javax.swing.JButton();
        changeAccount = new javax.swing.JButton();
        
        setLayout(new java.awt.GridBagLayout());
        java.awt.GridBagConstraints gridBagConstraints1;
        
        setBackground(java.awt.Color.white);
        serverInfo.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                serverInfoActionPerformed(evt);
            }
        });
        
        gridBagConstraints1 = new java.awt.GridBagConstraints();
        gridBagConstraints1.fill = java.awt.GridBagConstraints.HORIZONTAL;
        gridBagConstraints1.insets = new java.awt.Insets(5, 5, 5, 5);
        gridBagConstraints1.weightx = 1.0;
        add(serverInfo, gridBagConstraints1);
        
        deleteAccount.setText("Ta bort konto");
        deleteAccount.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                deleteAccountActionPerformed(evt);
            }
        });
        
        gridBagConstraints1 = new java.awt.GridBagConstraints();
        gridBagConstraints1.gridx = 0;
        gridBagConstraints1.gridy = 2;
        gridBagConstraints1.insets = new java.awt.Insets(5, 5, 5, 5);
        add(deleteAccount, gridBagConstraints1);
        
        jPanel1.setBackground(java.awt.Color.white);
        newAccount.setText("NyttKonto");
        newAccount.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                newAccountActionPerformed(evt);
            }
        });
        
        jPanel1.add(newAccount);
        
        changeAccount.setText("\u00c4ndra konto");
        changeAccount.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                changeAccountActionPerformed(evt);
            }
        });
        
        jPanel1.add(changeAccount);
        
        gridBagConstraints1 = new java.awt.GridBagConstraints();
        gridBagConstraints1.gridx = 0;
        gridBagConstraints1.gridy = 1;
        add(jPanel1, gridBagConstraints1);
        
    }//GEN-END:initComponents

    private void changeAccountActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_changeAccountActionPerformed
        createNewAccount(true);
    }//GEN-LAST:event_changeAccountActionPerformed

    private void newAccountActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_newAccountActionPerformed
        createNewAccount(false);
    }//GEN-LAST:event_newAccountActionPerformed
    
    private void deleteAccountActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_deleteAccountActionPerformed
        changed = true;
        DefaultComboBoxModel model = (DefaultComboBoxModel) serverInfo.getModel();
        model.removeElementAt(serverInfo.getSelectedIndex());
        serverInfo.setModel(model);
    }//GEN-LAST:event_deleteAccountActionPerformed

    private void serverInfoActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_serverInfoActionPerformed
        fireServerInfoChangeListener(new ServerInfoChangeEvent((ServerInfo) serverInfo.getSelectedItem()));
    }//GEN-LAST:event_serverInfoActionPerformed
    
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JComboBox serverInfo;
    private javax.swing.JButton deleteAccount;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JButton newAccount;
    private javax.swing.JButton changeAccount;
    // End of variables declaration//GEN-END:variables

}