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// Copyright 2009 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//      http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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 * @fileoverview Code to make goog.date.relative plurals-aware.
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 */
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goog.provide('goog.date.relativeWithPlurals');
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goog.require('goog.date.relative');
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goog.require('goog.date.relative.Unit');
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goog.require('goog.i18n.MessageFormat');
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/**
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 * Gets a localized relative date string for a given delta and unit.
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 * @param {number} delta Number of minutes/hours/days.
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 * @param {boolean} future Whether the delta is in the future.
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 * @param {goog.date.relative.Unit} unit The units the delta is in.
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 * @return {string} The message.
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 * @private
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 */
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goog.date.relativeWithPlurals.formatTimeDelta_ = function(delta, future, unit) {
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  if (!future && unit == goog.date.relative.Unit.MINUTES) {
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    /**
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     * @desc Relative date indicating how many minutes ago something happened.
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     */
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    var MSG_MINUTES_AGO_ICU = goog.getMsg(
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        '{NUM, plural, ' +
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        '=0 {# minutes ago}' +
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        '=1 {# minute ago}' +
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        'other {# minutes ago}}');
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    return new goog.i18n.MessageFormat(MSG_MINUTES_AGO_ICU).format({
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      'NUM': delta
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    });
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  } else if (future && unit == goog.date.relative.Unit.MINUTES) {
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    /**
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     * @desc Relative date indicating in how many minutes something happens.
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     */
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    var MSG_IN_MINUTES_ICU = goog.getMsg(
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        '{NUM, plural, ' +
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        '=0 {in # minutes}' +
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        '=1 {in # minute}' +
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        'other {in # minutes}}');
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    return new goog.i18n.MessageFormat(MSG_IN_MINUTES_ICU).format({
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      'NUM': delta
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    });
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  } else if (!future && unit == goog.date.relative.Unit.HOURS) {
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    /**
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     * @desc Relative date indicating how many hours ago something happened.
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     */
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    var MSG_HOURS_AGO_ICU = goog.getMsg(
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        '{NUM, plural, ' +
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        '=0 {# hours ago}' +
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        '=1 {# hour ago}' +
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        'other {# hours ago}}');
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    return new goog.i18n.MessageFormat(MSG_HOURS_AGO_ICU).format({
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      'NUM': delta
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    });
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  } else if (future && unit == goog.date.relative.Unit.HOURS) {
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    /**
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     * @desc Relative date indicating in how many hours something happens.
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     */
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    var MSG_IN_HOURS_ICU = goog.getMsg(
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        '{NUM, plural, ' +
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        '=0 {in # hours}' +
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        '=1 {in # hour}' +
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        'other {in # hours}}');
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    return new goog.i18n.MessageFormat(MSG_IN_HOURS_ICU).format({'NUM': delta});
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  } else if (!future && unit == goog.date.relative.Unit.DAYS) {
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    /**
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     * @desc Relative date indicating how many days ago something happened.
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     */
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    var MSG_DAYS_AGO_ICU = goog.getMsg(
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        '{NUM, plural, ' +
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        '=0 {# days ago}' +
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        '=1 {# day ago}' +
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        'other {# days ago}}');
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    return new goog.i18n.MessageFormat(MSG_DAYS_AGO_ICU).format({'NUM': delta});
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  } else if (future && unit == goog.date.relative.Unit.DAYS) {
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    /**
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     * @desc Relative date indicating in how many days something happens.
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     */
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    var MSG_IN_DAYS_ICU = goog.getMsg(
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        '{NUM, plural, ' +
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        '=0 {in # days}' +
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        '=1 {in # day}' +
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        'other {in # days}}');
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    return new goog.i18n.MessageFormat(MSG_IN_DAYS_ICU).format({'NUM': delta});
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  } else {
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    return '';
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  }
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};
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goog.date.relative.setTimeDeltaFormatter(
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    goog.date.relativeWithPlurals.formatTimeDelta_);
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