/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2013, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */
package org.jboss.as.domain.management.security.adduser;

import static org.jboss.as.domain.management.DomainManagementMessages.MESSAGES;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.jboss.as.domain.management.security.password.PasswordCheckResult;
import org.jboss.as.domain.management.security.password.RestrictionLevel;

/**
 * State to perform validation of the supplied password.
 *
 * @author <a href="mailto:darran.lofthouse@jboss.com">Darran Lofthouse</a>
 */
public class ValidatePasswordState extends AbstractValidationState {

    private final StateValues stateValues;
    private final ConsoleWrapper theConsole;

    public ValidatePasswordState(ConsoleWrapper theConsole, final StateValues stateValues) {
        this.theConsole = theConsole;
        this.stateValues = stateValues;
    }

    @Override
    protected Collection<State> getValidationStates() {
        final List<State> validationStates;
        final boolean relaxRestriction = RestrictionLevel.RELAX.equals(stateValues.getOptions().getCheckUtil().getRestrictionLevel());
        if (!relaxRestriction) {
            validationStates = new ArrayList<State>(1);
            validationStates.add(getDetailedCheckState());
        } else {
            validationStates = new ArrayList<State>(0);
        }
        return validationStates;
    }

    private State getRetryState() {
        return stateValues.isSilentOrNonInteractive() ? null : new PromptNewUserState(theConsole, stateValues);
    }

    private State getDetailedCheckState() {
        return new State() {

            @Override
            public State execute() {
                PasswordCheckResult result = stateValues.getOptions().getCheckUtil().check(false, stateValues.getUserName(), stateValues.getPassword());
                final boolean warnResult = PasswordCheckResult.Result.WARN.equals(result.getResult());
                final boolean rejectResult = PasswordCheckResult.Result.REJECT.equals(result.getResult());
                switch (stateValues.getOptions().getCheckUtil().getRestrictionLevel()) {
                    case WARN:
                        if ((warnResult || rejectResult) && !stateValues.isSilentOrNonInteractive()) {
                            return confirmWeakPassword(result);
                        }
                        break;
                    case REJECT:
                        if (warnResult && !stateValues.isSilentOrNonInteractive()) {
                            return confirmWeakPassword(result);
                        }
                        if (rejectResult) {
                            return new ErrorState(theConsole, result.getMessage(), getRetryState(), stateValues);
                        }
                        break;
                    default:
                        break;
                }
                return ValidatePasswordState.this;
            }
        };
    }

    private State confirmWeakPassword(PasswordCheckResult result) {
        String message = result.getMessage();
        String prompt = MESSAGES.sureToSetPassword();
        State noState = new PromptNewUserState(theConsole, stateValues);
        return new ConfirmationChoice(theConsole, message, prompt, this, noState);
    }

    @Override
    protected State getSuccessState() {
        // We like the password but want the user to re-enter to confirm they know the password.
        return stateValues.isInteractive() ? new PromptPasswordState(theConsole, stateValues, true) : new PreModificationState(
                theConsole, stateValues);
    }

}
