###*
* @file   Source code for Date extensions.
* @author Alvaro Juste
###
"use strict"

UnitMult =
  "century"     : 3153600000000,
  "decade"      : 315360000000,
  "year"        : 31536000000,
  "quarter"     : 7776000000,
  "month"       : 2592000000,
  "day"         : 86400000,
  "hour"        : 3600000,
  "minute"      : 60000,
  "second"      : 1000,
  "millisecond" : 1

###*
 * @function Adds seconds to date.
 * @param    {Number} seconds Seconds to add.
 * @return   {Date} New date
 ###
Date::addSeconds = (seconds) -> new Date this.getTime() + 1000 * seconds

###*
* @function Adds minutes to date.
* @param    {Number} minutes Minutes to add.
* @return   {Date} New date
###
Date::addMinutes = (minutes) -> new Date this.getTime() + 60000 * minutes

###*
* @function Adds hours to date.
* @param    {Number} hours Hours to add.
* @return   {Date} New date
###
Date::addHours = (hours) -> new Date this.getTime() + 3600000 * hours

###*
* @function Adds days to date.
* @param    {Number} days Days to add.
* @return   {Date} New date
###
Date::addDays = (days) -> new Date this.getTime() + 86400000 * days

###*
* @function Calculates the difference in seconds between two dates.
* @param    {Date} date The other date
* @return   {Number} Difference
###
Date::differenceInSeconds = (date) ->
  diff = (this.getTime() - date.getTime()) / 1000
  parseInt((if diff < 0 then 0 else diff), 10).toString 10

###*
* @function Calculates the difference in hours between two dates.
* @param    {Date} date The other date
* @return   {Number} Difference
###
Date::differenceInHours = (date) ->
  diff = (this.getTime() - date.getTime()) / 3600000
  parseInt((if diff < 0 then 0 else diff), 10).toString 10

###*
 * @function Removes time component from a date.
 * @return   {Date} New date
 ###
Date::removeTime = ->
  new Date this.getFullYear(), this.getMonth(), this.getDate()

###*
 * @function Tries to get locale date string for a particular locale.
 * @param    {Date} locale The locale
 * @return   {String} Representation of date
 ###
Date::tryToLocaleDateString = (locale) ->
  try
    this.toLocaleDateString locale
  catch
    this.toLocaleString()

###*
* @function Gets standard date format used in the application.
* @return   {String} Representation of date
###
Date::toStandardDate = ->
  [@getFullYear(), @getMonth() + 1, @getDate()].join '-'

###*
* @function Parses standard representation to date.
* @param    {String} input The input string
* @return   {Date} Date
###
Date.parseStandard = (input) ->
  try
    [hours, minutes, seconds] = input.split '-'
    new Date parseInt(hours, 10), parseInt(minutes, 10) - 1,
      parseInt(seconds, 10)
  catch
    new Date(-1)

###*
* @function Get time of milliseconds from enum
* @param    {String} val Value containing value and quantity
* @returns  {Number} The number of milliseconds.
###
Date.getTimeFromEnum = (val) ->
  parseInt(val, 10) * UnitMult[val.replace(/[0-9]/g, '')]