/*
 * Copyright 2011-17 Fraunhofer ISE, energy & meteo Systems GmbH and other contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.openmuc.openiec61850;

public final class BdaTapCommand extends BdaBitString {

    public enum TapCommand {
        STOP(0),
        LOWER(1),
        HIGHER(2),
        RESERVED(3);
        private final int value;

        private TapCommand(int value) {
            this.value = value;
        }

        public int getIntValue() {
            return value;
        }
    }

    public BdaTapCommand(ObjectReference objectReference, Fc fc, String sAddr, boolean dchg, boolean dupd) {
        super(objectReference, fc, sAddr, 2, dchg, dupd);
        basicType = BdaType.TAP_COMMAND;
        setDefault();
    }

    /**
     * Sets the value to TapCommand.STOP
     */
    @Override
    public void setDefault() {
        value = new byte[] { 0x00, 0x00 };
    }

    @Override
    public BdaTapCommand copy() {
        BdaTapCommand copy = new BdaTapCommand(objectReference, fc, sAddr, dchg, dupd);
        byte[] valueCopy = new byte[value.length];
        System.arraycopy(value, 0, valueCopy, 0, value.length);
        copy.setValue(valueCopy);
        if (mirror == null) {
            copy.mirror = this;
        }
        else {
            copy.mirror = mirror;
        }
        return copy;
    }

    public TapCommand getTapCommand() {

        if ((value[0] & 0xC0) == 0xC0) {
            return TapCommand.RESERVED;
        }

        if ((value[0] & 0x80) == 0x80) {
            return TapCommand.HIGHER;
        }

        if ((value[0] & 0x40) == 0x40) {
            return TapCommand.LOWER;
        }

        return TapCommand.STOP;

    }

    public void setTapCommand(TapCommand tapCommand) {
        if (tapCommand == TapCommand.RESERVED) {
            value[0] = (byte) 0xC0;
        }
        else if (tapCommand == TapCommand.HIGHER) {
            value[0] = (byte) 0x80;
        }
        else if (tapCommand == TapCommand.LOWER) {
            value[0] = (byte) 0x40;
        }
        else {
            value[0] = (byte) 0x00;
        }
    }

}
