/*
 * 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.memory.unix;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.jutils.jhardware.info.memory.AbstractMemoryInfo;
import org.jutils.jhardware.util.HardwareInfoUtils;

/**
 * Information related to Memory
 *
 * @author Javier Garcia Alonso
 */
public final class UnixMemoryInfo extends AbstractMemoryInfo {
  private static final String MEMINFO = "/proc/meminfo";

  private static String getMemoryData() {
    List<String> streamMemoryInfo = HardwareInfoUtils.readFile(MEMINFO);
    final StringBuilder buffer = new StringBuilder();

    for (String line : streamMemoryInfo) {
      buffer.append(line).append("\r\n");
    }

    return buffer.toString();
  }

  @Override
  protected Map<String, String> parseInfo() {
    Map<String, String> memoryDataMap = new HashMap<>();
    String[] dataStringLines = getMemoryData().split("\\r?\\n");

    for (final String dataLine : dataStringLines) {
      String[] dataStringInfo = dataLine.split(":");
      memoryDataMap.put(
          dataStringInfo[0].trim(), (dataStringInfo.length == 2) ? dataStringInfo[1].trim() : "");
    }

    return memoryDataMap;
  }
}