/*
 * 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.jutils.jhardware.info.network.unix;

import java.util.HashMap;
import java.util.Map;
import org.jutils.jhardware.info.network.AbstractNetworkInfo;
import org.jutils.jhardware.util.HardwareInfoUtils;

/**
 * Information related to Network
 *
 * @author Javier Garcia Alonso
 */
public final class UnixNetworkInfo extends AbstractNetworkInfo {

  private static String getNetworkData() {
    return HardwareInfoUtils.executeCommand("ifconfig", "-a");
  }

  @Override
  protected Map<String, String> parseInfo() {
    Map<String, String> networkDataMap = new HashMap<>();

    String networkData = getNetworkData();

    if (networkData != null) {
      String[] dataStringLines = networkData.split("\\r?\\n");

      int count = 0;
      for (final String dataLine : dataStringLines) {
        if (!dataLine.startsWith(" ")) {
          count++;
          networkDataMap.put(
              "interface_" + count, HardwareInfoUtils.extractText(dataLine, "([^\\s]+)"));
          networkDataMap.put(
              "type_" + count, HardwareInfoUtils.extractText(dataLine, "Link encap:(.+?)  "));
        } else {
          updateNetworkData(networkDataMap, count, dataLine);
        }
      }
      networkDataMap.put("interfacesLength", String.valueOf(count));
    }

    return networkDataMap;
  }

  private static void updateNetworkData(
      Map<String, String> networkDataMap, int count, String dataLine) {
    String lineType = HardwareInfoUtils.extractText(dataLine, "([^\\s]+)");
    if (null != lineType) {
      switch (lineType) {
        case "inet":
          networkDataMap.put(
              "ipv4_" + count, HardwareInfoUtils.extractText(dataLine, "addr:(.+?) "));
          break;
        case "inet6":
          networkDataMap.put(
              "ipv6_" + count, HardwareInfoUtils.extractText(dataLine, "addr:(.+?) "));
          break;
        case "RX":
          if (dataLine.trim().startsWith("RX packets")) {
            networkDataMap.put(
                "received_packets_" + count,
                HardwareInfoUtils.extractText(dataLine, "packets:(.+?) "));
          } else {
            networkDataMap.put(
                "received_bytes_" + count,
                HardwareInfoUtils.extractText(dataLine, "RX bytes:(.+?) "));
            networkDataMap.put(
                "transmitted_bytes_" + count,
                HardwareInfoUtils.extractText(dataLine, "TX bytes:(.+?) "));
          }
          break;
        case "TX":
          networkDataMap.put(
              "transmitted_packets_" + count,
              HardwareInfoUtils.extractText(dataLine, "packets:(.+?) "));
          break;
        default:
          break;
      }
    }
  }
}