/*
    * Cloudformation Plugin for SonarQube
    * Copyright (C) 2019 James Pether Sörling
    * james@hack23.com
    *
    * This program is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
    * License as published by the Free Software Foundation; either
    * version 3 of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with this program; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   */
  package com.hack23.sonar.cloudformation.reports.process;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.commons.io.IOUtils;
  import org.sonar.api.utils.log.Logger;
  import org.sonar.api.utils.log.Loggers;
  
  import com.fasterxml.jackson.core.type.TypeReference;
  import com.fasterxml.jackson.databind.DeserializationFeature;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.json.JsonMapper;
  import com.hack23.sonar.cloudformation.reports.checkov.CheckovReport;
  
  /**
   * The Class CheckovReportReader.
   */
  public class CheckovReportReader {
  
  	/** The Constant LOGGER. */
  	private static final Logger LOGGER = Loggers.get(CheckovReportReader.class);
  
  	/**
  	 * Read report.
  	 *
  	 * @param input the input
  	 * @return the list
  	 */
  	public List<CheckovReport> readReport(final InputStream input) {
  		final ObjectMapper objectMapper = JsonMapper.builder().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false).build();
  		String report = null;
  		try {
  		    report = new String(IOUtils.toByteArray(input));
  
  			return objectMapper.readValue(report,  new TypeReference<List<CheckovReport>>() { });
  		} catch (final IOException e) {
  
  			try {
  				final CheckovReport checkovReport = objectMapper.readValue(report, CheckovReport.class);
  				final List<CheckovReport> reportList = new ArrayList<>();
  				reportList.add(checkovReport);
  				return reportList;
  			} catch (final IOException e2) {
  				LOGGER.warn("Problem reading checkov report json:{}", e2.getMessage());
  				return new ArrayList<>();
  			}
  		}
  	}
  }