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/*
 * Copyright (C) 2004 Red Hat Inc. All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */
package com.arsdigita.cms.contenttypes.ui.contact;

import com.arsdigita.bebop.Component;
import com.arsdigita.bebop.ControlLink;
import com.arsdigita.bebop.Label;
import com.arsdigita.bebop.PageState;
import com.arsdigita.bebop.Table;
import com.arsdigita.bebop.event.TableActionEvent;
import com.arsdigita.bebop.event.TableActionListener;
import com.arsdigita.bebop.table.TableCellRenderer;
import com.arsdigita.bebop.table.TableColumn;
import com.arsdigita.bebop.table.TableColumnModel;
import com.arsdigita.bebop.table.TableModel;
import com.arsdigita.bebop.table.TableModelBuilder;
import com.arsdigita.cms.ItemSelectionModel;
import com.arsdigita.cms.SecurityManager;
import com.arsdigita.cms.contenttypes.Contact;
import com.arsdigita.cms.contenttypes.ContactPhone;
import com.arsdigita.cms.contenttypes.PhonesCollection;
import com.arsdigita.cms.dispatcher.Utilities;
import com.arsdigita.util.LockableImpl;

import java.math.BigDecimal;

/**
 * A Table to display the Phones associated with the Contact object.
 * Provides links to delete the corresponding phone in each row.
 * 
 * @author Shashin Shinde <a href="mailto:sshinde@redhat.com">sshinde@redhat.com</a>
 *
 * @version $Id: //cms/content-types/contact/dev/src/com/arsdigita/cms/contenttypes/ui/contact/PhonesTable.java#4 $
 *
 */
class PhonesTable extends Table implements TableActionListener{

  private ItemSelectionModel m_contactSel;
  
  private static final String COL_PHONE_TYPE ="Phone Type";
  private static final String COL_PHONE_NUM="Phone Number";
  private static final String COL_DELETE ="Delete";
  
  /**
   * Constructor.Create an instance of this class.
   * 
   * @param selContact , ItemSelectionModel which provides the 
   * <code>Contact</code> object whose Phones are to be manipulated.
   */
  public PhonesTable(ItemSelectionModel selContact) {
    super();
    m_contactSel = selContact;

    setEmptyView(new Label("No Phones associated with this Contact"));

    TableColumnModel model = getColumnModel();
    model.add( new TableColumn( 0, COL_PHONE_TYPE ));
    model.add( new TableColumn( 1, COL_PHONE_NUM ));
    model.add( new TableColumn( 2, COL_DELETE ));

    setModelBuilder(new PhonesTableModelBuilder(selContact));
    
    model.get(2).setCellRenderer(new DeleteCellRenderer());
    
    addTableActionListener(this);

  }

  private class PhonesTableModelBuilder extends LockableImpl implements TableModelBuilder {

    private ItemSelectionModel m_sel;
    
    private PhonesTableModelBuilder(ItemSelectionModel sel){
      m_sel = sel;
    }

    public TableModel makeModel ( Table table, PageState state ) {
      table.getRowSelectionModel().clearSelection(state);

      Contact contact = (Contact) m_sel.getSelectedObject(state);

      return new PhonesTableModel(table, state, contact);
    }
  }
  
  private class PhonesTableModel implements TableModel{
    
    private Table m_table;
    private PhonesCollection m_phones;
    private ContactPhone m_phone;
    
    private PhonesTableModel(Table t,PageState ps,Contact c){
      m_table = t;
      m_phones = c.getPhones();
    }
    
    public int getColumnCount() {
      return m_table.getColumnModel().size();
    }

    /**
     * check collection for the existence of another row.If it has fetch the
     * value of Current Phone object into m_phone class variable.
     */
    public boolean nextRow() {
      if(m_phones != null && m_phones.next()){
        m_phone = m_phones.getPhone();
        return true;
      } else {
        return false;
      }
    }
    
    /**
     * Return the phoneType and phoneNumber attributes for the Type and
     * Number columns respectively.
     * @see com.arsdigita.bebop.table.TableModel#getElementAt(int)
     */
    public Object getElementAt(int columnIndex) {
      switch (columnIndex){
        case 0:
          return m_phone.getPhoneType();
        case 1:
          return m_phone.getPhoneNumber();
        case 2:
          return "Delete";
        default:
          return null;
      }
    }

    /**
     * Always return the ID of <code>Phone</code> represented by current row. 
     * @see com.arsdigita.bebop.table.TableModel#getKeyAt(int)
     */
    public Object getKeyAt(int columnIndex) {
      return m_phone.getID();
    }

  }
    
  /**
   * Check for the permissions to delete item and put either a Lable or
   * a ControlLink accordingly.
   */
  private class DeleteCellRenderer extends LockableImpl implements TableCellRenderer{

    public Component getComponent(Table table,PageState state,Object value,
                                  boolean isSelected,Object key,
                                  int row,int column) {

      
      SecurityManager sm = Utilities.getSecurityManager(state);
      Contact item = (Contact) m_contactSel.getSelectedObject(state);
      
      boolean canDelete = sm.canAccess(state.getRequest(), 
                                    SecurityManager.DELETE_ITEM,
                                    item);
      if ( canDelete) {
        ControlLink link = new ControlLink(value.toString());  
        link.setConfirmation("Delete this Phone ?");
        return link; 
        } else {
          return new Label(value.toString());
        }
    }
}

  /**
   * Provide implementation to TableActionListener method.
   * Code that comes into picture when a link on the table is clicked.
   * Handles delete event.
   */
  public void cellSelected(TableActionEvent evt) {
    PageState state = evt.getPageState();

    TableColumn col = getColumnModel().get(evt.getColumn().intValue());
    String colName = (String) col.getHeaderValue();
    
    if ( COL_DELETE.equals(colName) ) {
      BigDecimal phoneID = new BigDecimal(evt.getRowKey().toString());
      Contact contact = (Contact) m_contactSel.getSelectedObject(state);
      ContactPhone ph = new ContactPhone(phoneID);
      contact.removePhone(ph);
    }
  }

  /**
   * provide Implementation to TableActionListener method.
   * Does nothing in our case. 
   */
  public void headSelected(TableActionEvent e) {
    throw new UnsupportedOperationException("Not Implemented");
  }
}