$(document).on 'ready page:load turbolinks:load', ->
  initContactUsMessage()
  refreshLandingHeader()

initContactUsMessage = () ->
  $('.contact_us_form #contact_message').each ->
    $this = $(this)
    $this.keypress (event) ->
      characters_left = $this.data('characters') - $this.val().length
      if characters_left <= 0
        event.preventDefault()
    $this.keyup () -> updateCharactersLeft()

    updateCharactersLeft = () ->
      characters_left = $this.data('characters') - $this.val().length
      $this.closest('form').find('.characters_left').html(Math.max(characters_left, 0))

    updateCharactersLeft()

$(window).scroll -> refreshLandingHeader()

refreshLandingHeader = ->
  $header = $('#landing_header')
  containerHeight = $header.find('.container').height()
  $header.css top: if window.pageYOffset > containerHeight then -containerHeight else -window.pageYOffset