/*
 * ============================================================================
 * GNU General Public License
 * ============================================================================
 *
 * Copyright (C) 2006-2011 Serotonin Software Technologies Inc. http://serotoninsoftware.com
 * @author Matthew Lohbihler
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * When signing a commercial license with Serotonin Software Technologies Inc.,
 * the following extension to GPL is made. A special exception to the GPL is 
 * included to allow you to distribute a combined work that includes BAcnet4J 
 * without being obliged to provide the source code for any proprietary components.
 */
package com.serotonin.bacnet4j.service.confirmed;

import org.apache.commons.lang3.StringUtils;

import com.serotonin.bacnet4j.LocalDevice;
import com.serotonin.bacnet4j.exception.BACnetErrorException;
import com.serotonin.bacnet4j.exception.BACnetException;
import com.serotonin.bacnet4j.service.acknowledgement.AcknowledgementService;
import com.serotonin.bacnet4j.type.constructed.Address;
import com.serotonin.bacnet4j.type.enumerated.ErrorClass;
import com.serotonin.bacnet4j.type.enumerated.ErrorCode;
import com.serotonin.bacnet4j.type.primitive.CharacterString;
import com.serotonin.bacnet4j.type.primitive.Enumerated;
import com.serotonin.bacnet4j.type.primitive.OctetString;
import org.free.bacnet4j.util.ByteQueue;

public class ReinitializeDeviceRequest extends ConfirmedRequestService {
    private static final long serialVersionUID = -1121790418202250804L;

    public static final byte TYPE_ID = 20;

    private final ReinitializedStateOfDevice reinitializedStateOfDevice;
    private final CharacterString password;

    public ReinitializeDeviceRequest(ReinitializedStateOfDevice reinitializedStateOfDevice, CharacterString password) {
        this.reinitializedStateOfDevice = reinitializedStateOfDevice;
        this.password = password;
    }

    @Override
    public byte getChoiceId() {
        return TYPE_ID;
    }

    @Override
    public void write(ByteQueue queue) {
        write(queue, reinitializedStateOfDevice, 0);
        writeOptional(queue, password, 1);
    }

    ReinitializeDeviceRequest(ByteQueue queue) throws BACnetException {
        reinitializedStateOfDevice = read(queue, ReinitializedStateOfDevice.class, 0);
        password = readOptional(queue, CharacterString.class, 1);
    }

    public static class ReinitializedStateOfDevice extends Enumerated {
        private static final long serialVersionUID = -819543984468869678L;
        public static final ReinitializedStateOfDevice coldstart = new ReinitializedStateOfDevice(0);
        public static final ReinitializedStateOfDevice warmstart = new ReinitializedStateOfDevice(1);
        public static final ReinitializedStateOfDevice startbackup = new ReinitializedStateOfDevice(2);
        public static final ReinitializedStateOfDevice endbackup = new ReinitializedStateOfDevice(3);
        public static final ReinitializedStateOfDevice startrestore = new ReinitializedStateOfDevice(4);
        public static final ReinitializedStateOfDevice endrestore = new ReinitializedStateOfDevice(5);
        public static final ReinitializedStateOfDevice abortrestore = new ReinitializedStateOfDevice(6);

        public ReinitializedStateOfDevice(int value) {
            super(value);
        }

        public ReinitializedStateOfDevice(ByteQueue queue) {
            super(queue);
        }
    }

    @Override
    public AcknowledgementService handle(LocalDevice localDevice, Address from, OctetString linkService)
            throws BACnetException {
        String password = null;
        if (this.password != null)
            password = this.password.getValue();
        if (password == null)
            password = "";

        // Check the password
        if (StringUtils.equals(localDevice.getPassword(), password)) {
            localDevice.getEventHandler().reinitializeDevice(reinitializedStateOfDevice);
            return null;
        }

        throw new BACnetErrorException(getChoiceId(), ErrorClass.security, ErrorCode.passwordFailure);
    }

    @Override
    public int hashCode() {
        final int PRIME = 31;
        int result = 1;
        result = PRIME * result + ((password == null) ? 0 : password.hashCode());
        result = PRIME * result + ((reinitializedStateOfDevice == null) ? 0 : reinitializedStateOfDevice.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final ReinitializeDeviceRequest other = (ReinitializeDeviceRequest) obj;
        if (password == null) {
            if (other.password != null)
                return false;
        }
        else if (!password.equals(other.password))
            return false;
        if (reinitializedStateOfDevice == null) {
            if (other.reinitializedStateOfDevice != null)
                return false;
        }
        else if (!reinitializedStateOfDevice.equals(other.reinitializedStateOfDevice))
            return false;
        return true;
    }
}