/*
    * Licensed under the GPL License. You may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *   https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
    *
    * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
    * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
    * PURPOSE.
   */
  package psiprobe.controllers.sql;
  
  import java.nio.charset.StandardCharsets;
  import java.util.List;
  
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.servlet.http.HttpSession;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.ServletRequestUtils;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.servlet.ModelAndView;
  import org.springframework.web.servlet.mvc.AbstractController;
  
  import psiprobe.model.sql.DataSourceTestInfo;
  
  /**
   * Retrieves a single query from a history list.
   */
  @Controller
  public class QueryHistoryItemController extends AbstractController {
  
    /** The Constant logger. */
    private static final Logger logger = LoggerFactory.getLogger(QueryHistoryItemController.class);
  
    @RequestMapping(path = "/sql/queryHistoryItem.ajax")
    @Override
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
        throws Exception {
      return super.handleRequest(request, response);
    }
  
    @Override
    protected ModelAndView handleRequestInternal(HttpServletRequest request,
        HttpServletResponse response) throws Exception {
  
      int sqlId = ServletRequestUtils.getIntParameter(request, "sqlId", -1);
  
      HttpSession sess = request.getSession(false);
  
      if (sess != null) {
        DataSourceTestInfo sessData =
            (DataSourceTestInfo) sess.getAttribute(DataSourceTestInfo.DS_TEST_SESS_ATTR);
  
        if (sessData != null) {
          List<String> queryHistory = sessData.getQueryHistory();
  
          if (queryHistory != null) {
            try {
              String sql = queryHistory.get(sqlId);
              response.setCharacterEncoding(StandardCharsets.UTF_8.name());
              response.getWriter().print(sql);
            } catch (IndexOutOfBoundsException e) {
              logger.error("Cannot find a query history entry for history item id = {}", sqlId);
              logger.trace("", e);
            }
          }
        }
      }
  
      return null;
    }
  
  }