////////////////////////////////////////////////////////////////////////////////
/// @brief test suite for Logger 
///
/// @file
///
/// DISCLAIMER
///
/// Copyright 2004-2012 triagens GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is triAGENS GmbH, Cologne, Germany
///
/// @author Jan Steemann
/// @author Copyright 2015, ArangoDB GmbH, Cologne, Germany
////////////////////////////////////////////////////////////////////////////////

#include "Basics/Common.h"
#include "Basics/FileUtils.h"

#include "catch.hpp"

#include "Logger/Logger.h"
#include "Logger/LogAppenderFile.h"

using namespace arangodb;
using namespace arangodb::basics;

// -----------------------------------------------------------------------------
// --SECTION--                                                        test suite
// -----------------------------------------------------------------------------

TEST_CASE("LoggerTest", "[loggertest]") {
  // store old state as backup
  auto backup = LogAppenderFile::getFds();
    
  std::string const path = TRI_GetTempPath();
  std::string const logfile1 = path + "logfile1";
  std::string const logfile2 = path + "logfile2";
    
  FileUtils::remove(logfile1);
  FileUtils::remove(logfile2);
    
  
  // remove any previous loggers
  LogAppenderFile::clear();

  SECTION("test_fds") {
    LogAppenderFile logger1(logfile1, "");
    LogAppenderFile logger2(logfile2, "");

    auto fds = LogAppenderFile::getFds();
    CHECK(fds.size() == 2);

    CHECK(std::get<1>(fds[0]) == logfile1);
    CHECK(std::get<2>(fds[0])->fd() == std::get<0>(fds[0]));

    logger1.logMessage(LogLevel::ERR, "some error message", 0);  
    logger2.logMessage(LogLevel::WARN, "some warning message", 0);  
  
    std::string content = FileUtils::slurp(logfile1);
    CHECK(content.find("some error message") != std::string::npos);
    CHECK(content.find("some warning message") == std::string::npos);

    content = FileUtils::slurp(logfile2); 
    CHECK(content.find("some error message") == std::string::npos);
    CHECK(content.find("some warning message") != std::string::npos);
    
    LogAppenderFile::clear();
  }
  
  SECTION("test_fds_after_reopen") {
    LogAppenderFile logger1(logfile1, "");
    LogAppenderFile logger2(logfile2, "");

    auto fds = LogAppenderFile::getFds();
    CHECK(fds.size() == 2);

    CHECK(std::get<1>(fds[0]) == logfile1);
    CHECK(std::get<2>(fds[0])->fd() == std::get<0>(fds[0]));

    logger1.logMessage(LogLevel::ERR, "some error message", 0);  
    logger2.logMessage(LogLevel::WARN, "some warning message", 0);  
  
    std::string content = FileUtils::slurp(logfile1);
    CHECK(content.find("some error message") != std::string::npos);
    CHECK(content.find("some warning message") == std::string::npos);

    content = FileUtils::slurp(logfile2); 
    CHECK(content.find("some error message") == std::string::npos);
    CHECK(content.find("some warning message") != std::string::npos);

    LogAppenderFile::reopenAll();
    
    fds = LogAppenderFile::getFds();
    CHECK(fds.size() == 2);

    CHECK(std::get<0>(fds[0]) > STDERR_FILENO);
    CHECK(std::get<1>(fds[0]) == logfile1);
    CHECK(std::get<2>(fds[0])->fd() == std::get<0>(fds[0]));

    logger1.logMessage(LogLevel::ERR, "some other error message", 0);  
    logger2.logMessage(LogLevel::WARN, "some other warning message", 0);  
  
    content = FileUtils::slurp(logfile1);
    CHECK(content.find("some error message") == std::string::npos);
    CHECK(content.find("some warning message") == std::string::npos);
    CHECK(content.find("some other error message") != std::string::npos);

    content = FileUtils::slurp(logfile2); 
    CHECK(content.find("some error message") == std::string::npos);
    CHECK(content.find("some warning message") == std::string::npos);
    CHECK(content.find("some other warning message") != std::string::npos);
  
    LogAppenderFile::clear();
  }

  // restore old state
  LogAppenderFile::setFds(backup);
  LogAppenderFile::reopenAll();
  
  FileUtils::remove(logfile1);
  FileUtils::remove(logfile2);
}