moment = require 'moment'
appConfig = require 'app_config'
Collection = require 'collections/collection'
Iteration = require 'models/iteration'

module.exports = class Iterations extends Collection
  url: appConfig.almWebServiceBaseUrl + '/webservice/@@WSAPI_VERSION/iteration'
  model: Iteration

  findClosestAsCurrent: ->
    now = moment()
    closestIteration = null
    closestDuration = null
    @each (iteration) ->
      startDate = new Date(iteration.get('StartDate'))
      thisDuration = Math.abs(now.diff(startDate))
      if startDate < now && new Date(iteration.get('EndDate')) > now
        closestIteration = iteration
        closestDuration = thisDuration
        return false

      if closestIteration
        if thisDuration < closestDuration
          closestIteration = iteration
          closestDuration = thisDuration
      else
        closestIteration = iteration
        closestDuration = thisDuration
    , null

    closestIteration