/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#if defined(_MSC_VER)
#pragma warning ( disable: 4231 4251 4275 4786 )
#endif

#include <log4cxx/logstring.h>
#include <log4cxx/pattern/datepatternconverter.h>
#include <log4cxx/spi/loggingevent.h>
#include <log4cxx/spi/location/locationinfo.h>
#include <log4cxx/helpers/absolutetimedateformat.h>
#include <log4cxx/helpers/datetimedateformat.h>
#include <log4cxx/helpers/iso8601dateformat.h>
#include <log4cxx/helpers/strftimedateformat.h>
#include <log4cxx/helpers/stringhelper.h>
#include <log4cxx/helpers/exception.h>
#include <log4cxx/helpers/loglog.h>
#include <log4cxx/helpers/date.h>

using namespace log4cxx;
using namespace log4cxx::pattern;
using namespace log4cxx::spi;
using namespace log4cxx::helpers;

IMPLEMENT_LOG4CXX_OBJECT(DatePatternConverter)

DatePatternConverter::DatePatternConverter(
   const std::vector<LogString>& options) :
   LoggingEventPatternConverter(LOG4CXX_STR("Class Name"),
      LOG4CXX_STR("class name")), df(getDateFormat(options)) {
}

DateFormatPtr DatePatternConverter::getDateFormat(const OptionsList& options) {
  DateFormatPtr df;
  int maximumCacheValidity = 1000000;
  if (options.size() == 0) {
      df = new ISO8601DateFormat();
  } else {
     LogString dateFormatStr(options[0]);

     if(dateFormatStr.empty() ||
          StringHelper::equalsIgnoreCase(dateFormatStr,
          LOG4CXX_STR("ISO8601"), LOG4CXX_STR("iso8601"))) {
          df = new ISO8601DateFormat();
     } else if(StringHelper::equalsIgnoreCase(dateFormatStr,
          LOG4CXX_STR("ABSOLUTE"), LOG4CXX_STR("absolute"))) {
          df = new AbsoluteTimeDateFormat();
     } else if(StringHelper::equalsIgnoreCase(dateFormatStr,
          LOG4CXX_STR("DATE"), LOG4CXX_STR("date"))) {
          df = new DateTimeDateFormat();
     } else {
       if (dateFormatStr.find(0x25 /*'%'*/) == std::string::npos) {
          try {
             df = new SimpleDateFormat(dateFormatStr);
             maximumCacheValidity =
                CachedDateFormat::getMaximumCacheValidity(dateFormatStr);
          } catch(IllegalArgumentException& e) {
             df = new ISO8601DateFormat();
             LogLog::warn(((LogString)
                LOG4CXX_STR("Could not instantiate SimpleDateFormat with pattern "))
                   + dateFormatStr, e);
          }
       } else {
          df = new StrftimeDateFormat(dateFormatStr);
       }
     }
     if (options.size() >= 2) {
       TimeZonePtr tz(TimeZone::getTimeZone(options[1]));
       if (tz != NULL) {
          df->setTimeZone(tz);
       }
     }
  }
  if (maximumCacheValidity > 0) {
      df = new CachedDateFormat(df, maximumCacheValidity);
  }
  return df;
}

PatternConverterPtr DatePatternConverter::newInstance(
   const std::vector<LogString>& options) {
   return new DatePatternConverter(options);
}

void DatePatternConverter::format(
  const LoggingEventPtr& event,
  LogString& toAppendTo,
  Pool& p) const {
   df->format(toAppendTo, event->getTimeStamp(), p);
 }

  /**
   * {@inheritDoc}
   */
void DatePatternConverter::format(
    const ObjectPtr& obj,
    LogString& toAppendTo,
    Pool& p) const {
    DatePtr date(obj);
    if (date != NULL) {
      format(date, toAppendTo, p);
    } else {
      LoggingEventPtr event(obj);
      if (event != NULL) {
          format(event, toAppendTo, p);
      }
    }
}

  /**
   * Append formatted date to string buffer.
   * @param date date
   * @param toAppendTo buffer to which formatted date is appended.
   */
void DatePatternConverter::format(
    const DatePtr& date,
    LogString& toAppendTo,
    Pool& p) const {
    df->format(toAppendTo, date->getTime(), p);
}