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/*
 * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
 *
 * 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.traccar;

import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.handler.codec.string.StringEncoder;
import org.traccar.database.ActiveDevice;
import org.traccar.model.Command;

import com.cloudhopper.smpp.type.RecoverablePduException;
import com.cloudhopper.smpp.type.SmppChannelException;
import com.cloudhopper.smpp.type.SmppTimeoutException;
import com.cloudhopper.smpp.type.UnrecoverablePduException;

import javax.xml.bind.DatatypeConverter;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;

public abstract class BaseProtocol implements Protocol {

    private final String name;
    private final Set<String> supportedCommands = new HashSet<>();
    private final Set<String> supportedSmsCommands = new HashSet<>();

    private BaseProtocolSmsEncoder smsEncoder = null;

    public BaseProtocol(String name) {
        this.name = name;
    }

    @Override
    public String getName() {
        return name;
    }

    public void setSupportedCommands(String... commands) {
        supportedCommands.addAll(Arrays.asList(commands));
    }

    public void setSupportedSmsCommands(String... commands) {
        supportedSmsCommands.addAll(Arrays.asList(commands));
    }

    @Override
    public Collection<String> getSupportedCommands() {
        Set<String> commands = new HashSet<>(supportedCommands);
        commands.add(Command.TYPE_CUSTOM);
        return commands;
    }

    @Override
    public Collection<String> getSupportedSmsCommands() {
        Set<String> commands = new HashSet<>(supportedSmsCommands);
        commands.add(Command.TYPE_CUSTOM);
        return commands;
    }

    @Override
    public void sendCommand(ActiveDevice activeDevice, Command command) {
        if (supportedCommands.contains(command.getType())) {
            activeDevice.write(command);
        } else if (command.getType().equals(Command.TYPE_CUSTOM)) {
            String data = command.getString(Command.KEY_DATA);
            if (activeDevice.getChannel().getPipeline().get(StringEncoder.class) != null) {
                activeDevice.write(data);
            } else {
                activeDevice.write(ChannelBuffers.wrappedBuffer(DatatypeConverter.parseHexBinary(data)));
            }
        } else {
            throw new RuntimeException("Command " + command.getType() + " is not supported in protocol " + getName());
        }
    }

    public void setSmsEncoder(BaseProtocolSmsEncoder smsEncoder) {
        this.smsEncoder = smsEncoder;
    }

    @Override
    public void sendSmsCommand(String phone, Command command) throws RecoverablePduException, UnrecoverablePduException,
            SmppTimeoutException, SmppChannelException, InterruptedException {
        if (Context.getSmppManager() != null) {
            if (command.getType().equals(Command.TYPE_CUSTOM)) {
                Context.getSmppManager().sendMessageSync(phone, command.getString(Command.KEY_DATA), true);
            } else if (supportedSmsCommands.contains(command.getType()) && smsEncoder != null) {
                Context.getSmppManager().sendMessageSync(phone, smsEncoder.encodeSmsCommand(command), true);
            } else {
                throw new RuntimeException(
                        "Command " + command.getType() + " is not supported in protocol " + getName());
            }
        } else {
            throw new RuntimeException("Smpp client is not enabled");
        }
    }

}