/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.
 */
package org.jclouds.date.joda;

import static org.jclouds.date.internal.DateUtils.trimToMillis;
import static org.jclouds.date.internal.DateUtils.trimTZ;

import java.util.Date;
import java.util.Locale;

import javax.inject.Singleton;

import org.jclouds.date.DateService;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

/**
 * 
 * @author Adrian Cole
 * @author James Murty
 */
@Singleton
public class JodaDateService implements DateService {

   private static final DateTimeFormatter rfc822DateFormatter = DateTimeFormat.forPattern(
            "EEE, dd MMM yyyy HH:mm:ss 'GMT'").withLocale(Locale.US).withZone(DateTimeZone.forID("GMT"));

   private static final DateTimeFormatter cDateFormatter = DateTimeFormat
            .forPattern("EEE MMM dd HH:mm:ss '+0000' yyyy").withLocale(Locale.US).withZone(DateTimeZone.forID("GMT"));

   private static final DateTimeFormatter iso8601SecondsDateFormatter = DateTimeFormat.forPattern(
            "yyyy-MM-dd'T'HH:mm:ss'Z'").withLocale(Locale.US).withZone(DateTimeZone.forID("GMT"));

   private static final DateTimeFormatter iso8601DateFormatter = DateTimeFormat.forPattern(
            "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").withLocale(Locale.US).withZone(DateTimeZone.forID("GMT"));

   public final Date fromSeconds(long seconds) {
      return new Date(seconds * 1000);
   }

   public final String cDateFormat(Date dateTime) {
      return cDateFormatter.print(new DateTime(dateTime));
   }

   public final String cDateFormat() {
      return cDateFormat(new Date());
   }

   public final Date cDateParse(String toParse) {
      return cDateFormatter.parseDateTime(toParse).toDate();
   }

   public final String rfc822DateFormat(Date dateTime) {
      return rfc822DateFormatter.print(new DateTime(dateTime));
   }

   public final String rfc822DateFormat() {
      return rfc822DateFormat(new Date());
   }

   public final Date rfc822DateParse(String toParse) {
      return rfc822DateFormatter.parseDateTime(toParse).toDate();
   }

   public final String iso8601SecondsDateFormat(Date dateTime) {
      return iso8601SecondsDateFormatter.print(new DateTime(dateTime));
   }

   public final String iso8601SecondsDateFormat() {
      return iso8601SecondsDateFormat(new Date());
   }

   public final String iso8601DateFormat(Date date) {
      return iso8601DateFormatter.print(new DateTime(date));
   }

   public final String iso8601DateFormat() {
      return iso8601DateFormat(new Date());
   }

   public final Date iso8601DateParse(String toParse) {
      toParse = trimTZ(toParse);
      toParse = trimToMillis(toParse);
      return iso8601DateFormatter.parseDateTime(toParse).toDate();
   }

   public final Date iso8601SecondsDateParse(String toParse) {
      toParse = trimTZ(toParse);
      return iso8601SecondsDateFormatter.parseDateTime(toParse).toDate();
   }
}