/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2014 by RapidMiner and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapidminer.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.security;


import java.util.LinkedList;

import javax.swing.table.AbstractTableModel;

/** 
 * A table model wrapped around a {@link Wallet} used by the {@link PasswordManager} to edit user credentials. 
 * 
 * @author Miguel Buescher
 *
 */
public class CredentialsTableModel extends AbstractTableModel {

	private static final long serialVersionUID = 1L;

	private boolean showPasswords;
	private Wallet wallet;
	private LinkedList<String> listOfWalletKeys = new LinkedList<String>();
	
	
	public CredentialsTableModel(Wallet wallet) {
		this.wallet = wallet;
	}
	
	@Override
	public int getColumnCount() {
		if (isShowPasswords()) {
			return 4;
		}
		return 3;
	}

	@Override
	public int getRowCount() {
		return getWallet().size();
	}

	@Override
	@SuppressWarnings("deprecation")
	public Object getValueAt(int rowIndex, int columnIndex) {
		this.listOfWalletKeys = getWallet().getKeys();
		// uses list of keys directly which may or may not contain ID attribute, therefore this call is correct
		UserCredential userCredential = getWallet().getEntry(listOfWalletKeys.get(rowIndex));
		switch (columnIndex) {
		case 0:
			return getWallet().extractIdFromKey(listOfWalletKeys.get(rowIndex));
		case 1:
			return userCredential.getURL(); 
		case 2:
			return userCredential.getUsername(); 
		case 3:
			return new String(userCredential.getPassword());
		default: throw new RuntimeException("No such column: " + columnIndex); // cannot happen
		}		
	}
	
	@Override
	public boolean isCellEditable(int rowIndex, int columnIndex){ 
		if (columnIndex == 0 || columnIndex == 1) return false;
		return true;
	}
	
	@Override
	@SuppressWarnings("deprecation")
    public void setValueAt(Object value, int row, int col) {
		this.listOfWalletKeys = getWallet().getKeys();
		// uses list of keys directly which may or may not contain ID attribute, therefore this call is correct
		UserCredential userCredential = getWallet().getEntry(listOfWalletKeys.get(row));
    	if (col == 2){
    		userCredential.setUser((String) value);
    	} 
    	if (col == 3){
    		userCredential.setPassword(((String) value).toCharArray());
    	}
    	
    	wallet.saveCache();
        fireTableCellUpdated(row, col);
    }

	@Override
	public String getColumnName(int column) {
		switch (column) {
		case 0:
			return "ID";
		case 1:
			return "URL"; 
		case 2:
			return "Username"; 
		case 3:
			return "Password";
		default: throw new RuntimeException("No such column: "+column); // cannot happen
		}
	}

	public void setShowPasswords(boolean showPasswords) {
		this.showPasswords = showPasswords;
		fireTableStructureChanged();
	}

	public boolean isShowPasswords() {
		return showPasswords;
	}
	
	@SuppressWarnings("deprecation")
	public void removeRow(int index) {
		// uses list of keys directly which may or may not contain ID attribute, therefore this call is correct
		getWallet().removeEntry(listOfWalletKeys.get(index));
		fireTableStructureChanged();
	}
	
	@SuppressWarnings("unchecked")
	public Class getColumnClass(int c) {
		if (getValueAt(0, c) == null) {
			return String.class;
		}
        return getValueAt(0, c).getClass();
    }

	private Wallet getWallet() {
		return wallet;
	}
}