/**
 * Copyright (c) 2008, SnakeYAML
 *
 * 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.
 */
package org.yaml.snakeyaml.issues.issue49;

import static org.junit.Assert.assertNotEquals;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
import junit.framework.TestCase;
import org.yaml.snakeyaml.Yaml;

public class CalendarTest extends TestCase {

  /**
   * Daylight Saving Time is not taken into account
   */
  public void testDumpDstIgnored() {
    CalendarBean bean = new CalendarBean();
    bean.setName("lunch");
    Calendar cal = Calendar.getInstance();
    cal.setTime(new Date(1000000000000L));
    cal.setTimeZone(TimeZone.getTimeZone("GMT-8:00"));
    bean.setCalendar(cal);
    Yaml yaml = new Yaml();
    String output = yaml.dumpAsMap(bean);
    // System.out.println(output);
    assertEquals("calendar: 2001-09-08T17:46:40-08:00\nname: lunch\n", output);
    //
    Yaml loader = new Yaml();
    CalendarBean parsed = loader.loadAs(output, CalendarBean.class);
    assertEquals(bean.getCalendar(), parsed.getCalendar());
  }

  /**
   * Daylight Saving Time is in effect on this date/time in America/Los_Angeles Daylight<br/>
   * Saving Time is not in effect on this date/time in GMT
   */
  public void testDumpDstIsNotTheSame() {
    check(1000000000000L, "America/Los_Angeles", "Must be 7 hours difference.",
        "2001-09-08T18:46:40-07:00");
  }

  /**
   * Daylight Saving Time is not in effect on this date/time in America/Los_Angeles Daylight<br/>
   * Saving Time is not in effect on this date/time in GMT
   */
  public void testDumpDstIsTheSame() {
    check(1266833741374L, "America/Los_Angeles", "Must be 8 hours difference.",
        "2010-02-22T02:15:41.374-08:00");
  }

  /**
   * Test odd time zone
   */
  public void testNepal() {
    check(1266833741374L, "Asia/Katmandu", "Must be 5:45 hours difference.",
        "2010-02-22T16:00:41.374+05:45");
  }

  public void testMoreThen10hours() {
    check(1266833741374L, "Asia/Kamchatka", "Must be 12 hours difference.",
        "2010-02-22T22:15:41.374+12:00");
  }

  private void check(long time, String timeZone, String warning, String etalon) {
    CalendarBean bean = new CalendarBean();
    bean.setName("lunch");
    Calendar cal = Calendar.getInstance();
    cal.setTime(new Date(time));
    cal.setTimeZone(TimeZone.getTimeZone(timeZone));
    bean.setCalendar(cal);
    Yaml yaml = new Yaml();
    String output = yaml.dumpAsMap(bean);
    // System.out.println(output);
    assertEquals(warning, "calendar: " + etalon + "\nname: lunch\n", output);
    //
    Yaml loader = new Yaml();
    CalendarBean parsed = loader.loadAs(output, CalendarBean.class);
    assertNotEquals("TimeZone must deviate.", bean.getCalendar(), parsed.getCalendar());
    assertEquals(bean.getCalendar().getTimeInMillis(), parsed.getCalendar().getTimeInMillis());
  }

  public void testLoadBean() {
    Yaml beanLoader = new Yaml();
    CalendarBean bean = beanLoader.loadAs("calendar:  2001-12-14t21:59:43.10-05:00\nname: dinner",
        CalendarBean.class);
    assertEquals("dinner", bean.getName());
    Calendar calendar = bean.getCalendar();
    assertEquals(TimeZone.getTimeZone("GMT-5:00").getOffset(calendar.getTime().getTime()),
        calendar.getTimeZone().getOffset(calendar.getTime().getTime()));
    //
    Yaml yaml = new Yaml();
    Date date = yaml.load("2001-12-14t21:59:43.10-05:00");
    assertEquals(date, calendar.getTime());
  }

  public void testLoadWithTag() {
    Yaml yaml = new Yaml();
    GregorianCalendar calendar =
        yaml.load("!!java.util.GregorianCalendar 2001-12-14t21:59:43.10-05:00");
    assertEquals(TimeZone.getTimeZone("GMT-5:00").getOffset(calendar.getTime().getTime()),
        calendar.getTimeZone().getOffset(calendar.getTime().getTime()));
    //
    Date date = yaml.load("2001-12-14t21:59:43.10-05:00");
    assertEquals(date, calendar.getTime());
  }
}
