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/*
 * SonarQube
 * Copyright (C) 2009-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.server.ui;

import com.google.common.collect.Maps;
import java.util.Date;
import java.util.Locale;
import java.util.Map;
import javax.annotation.Nullable;
import org.apache.commons.lang.StringUtils;
import org.sonar.api.server.ServerSide;
import org.sonar.api.i18n.I18n;
import org.sonar.api.utils.Duration;
import org.sonar.api.utils.Durations;
import org.sonar.server.user.UserSession;

/**
 * Used through ruby code Internal.i18n
 *
 * Bridge between JRuby webapp and Java I18n component
 */
@ServerSide
public class JRubyI18n {

  private final I18n i18n;
  private final Durations durations;
  private final UserSession userSession;
  private Map localesByRubyKey = Maps.newHashMap();

  public JRubyI18n(I18n i18n, Durations durations, UserSession userSession) {
    this.i18n = i18n;
    this.durations = durations;
    this.userSession = userSession;
  }

  Locale getLocale(String rubyKey) {
    Locale locale = localesByRubyKey.get(rubyKey);
    if (locale == null) {
      locale = toLocale(rubyKey);
      localesByRubyKey.put(rubyKey, locale);
    }
    return locale;
  }

  Map getLocalesByRubyKey() {
    return localesByRubyKey;
  }

  public static Locale toLocale(@Nullable String rubyKey) {
    Locale locale;
    if (rubyKey == null) {
      locale = Locale.ENGLISH;
    } else {
      String[] fields = StringUtils.split(rubyKey, "-");
      if (fields.length == 1) {
        locale = new Locale(fields[0]);
      } else {
        locale = new Locale(fields[0], fields[1]);
      }
    }
    return locale;
  }

  public String message(String rubyLocale, String key, String defaultValue, Object... parameters) {
    return StringUtils.defaultString(i18n.message(getLocale(rubyLocale), key, defaultValue, parameters), key);
  }

  public String ageFromNow(Date date) {
    return i18n.ageFromNow(userSession.locale(), date);
  }

  public String formatDuration(Duration duration, String format) {
    return durations.format(userSession.locale(), duration, Durations.DurationFormat.valueOf(format));
  }

  public String formatLongDuration(long duration, String format) {
    return formatDuration(Duration.create(duration), format);
  }

  public String formatDateTime(Date date) {
    return i18n.formatDateTime(userSession.locale(), date);
  }

}