/*
 * Copyright 2017-present Open Networking Foundation
 *
 * 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.onosproject.reactive.routing;

import com.fasterxml.jackson.databind.JsonNode;
import com.google.common.collect.Sets;
import org.onlab.packet.IpAddress;
import org.onlab.packet.IpPrefix;
import org.onlab.packet.MacAddress;
import org.onosproject.core.ApplicationId;
import org.onosproject.net.config.Config;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Set;

/**
 * Configuration object for prefix config.
 */
public class ReactiveRoutingConfig extends Config<ApplicationId> {

    private final Logger log = LoggerFactory.getLogger(getClass());

    public static final String IP4LOCALPREFIXES = "ip4LocalPrefixes";
    public static final String IP6LOCALPREFIXES = "ip6LocalPrefixes";
    public static final String IPPREFIX = "ipPrefix";
    public static final String TYPE = "type";
    public static final String GATEWAYIP = "gatewayIp";
    public static final String VIRTUALGATEWAYMACADDRESS =
                               "virtualGatewayMacAddress";

    /**
     * Gets the set of configured local IPv4 prefixes.
     *
     * @return IPv4 prefixes
     */
    public Set<LocalIpPrefixEntry> localIp4PrefixEntries() {
        Set<LocalIpPrefixEntry> prefixes = Sets.newHashSet();

        JsonNode prefixesNode = object.get(IP4LOCALPREFIXES);
        if (prefixesNode == null) {
            log.warn("ip4LocalPrefixes is null!");
            return prefixes;
        }

        prefixesNode.forEach(jsonNode -> {

            prefixes.add(new LocalIpPrefixEntry(
                    IpPrefix.valueOf(jsonNode.get(IPPREFIX).asText()),
                    LocalIpPrefixEntry.IpPrefixType.valueOf(jsonNode.get(TYPE).asText()),
                    IpAddress.valueOf(jsonNode.get(GATEWAYIP).asText())));
        });

        return prefixes;
    }

    /**
     * Gets the set of configured local IPv6 prefixes.
     *
     * @return IPv6 prefixes
     */
    public Set<LocalIpPrefixEntry> localIp6PrefixEntries() {
        Set<LocalIpPrefixEntry> prefixes = Sets.newHashSet();

        JsonNode prefixesNode = object.get(IP6LOCALPREFIXES);

        if (prefixesNode == null) {
            log.warn("ip6LocalPrefixes is null!");
            return prefixes;
        }

        prefixesNode.forEach(jsonNode -> {

            prefixes.add(new LocalIpPrefixEntry(
                    IpPrefix.valueOf(jsonNode.get(IPPREFIX).asText()),
                    LocalIpPrefixEntry.IpPrefixType.valueOf(jsonNode.get(TYPE).asText()),
                    IpAddress.valueOf(jsonNode.get(GATEWAYIP).asText())));
        });

        return prefixes;
    }

    /**
     *  Gets of the virtual gateway MAC address.
     *
     * @return virtual gateway MAC address
     */
    public MacAddress virtualGatewayMacAddress() {
        return MacAddress.valueOf(
                object.get(VIRTUALGATEWAYMACADDRESS).asText());
    }
}