linearMode = false
linearCount = 0
selection = null
itemMax = 1

refreshQuestion = () ->
  if(sessionStorage.getItem('user_items'))
    items = JSON.parse(sessionStorage.getItem('user_items'))
    itemMax = items.length
    if linearMode
      selection = items[linearCount]
      linearCount++
      refreshQuizCounter()
      if linearCount >= items.length # Wrap around
        linearCount = 0
    else
      selection = items[Math.floor(Math.random() * items.length)]
    $("#help-area").text('');
    $("#kana").removeClass("correct").val('');
    $("#question-area").text('');
    $("#question-image").attr("src", '');
    $('#answer').addClass('hidden');
    $('#answer').text(selection['answer']);
    input_element = document.getElementById('kana');
    $("#question-image").hide()
    if(selection['item_type']  == 'radical')
      $("#kana").attr("placeholder", "Meaning")
      document.body.style.backgroundColor = "deepskyblue";
      wanakana.unbind(input_element);
      if(selection['question'].indexOf('http') >= 0)
        $("#question-image").attr("src", selection['question']);
        $("#question-image").show()
      else
        $("#question-area").text(selection['question']);
      document.getElementById('view-on-wk').href ="https://www.wanikani.com/radicals/" + selection['answer']
    else
      if(selection['item_type'] == 'kanji')
        document.body.style.backgroundColor = "deeppink";
      else
        document.body.style.backgroundColor = "darkviolet";
      $("#question-area").text(selection['question']);
      if(selection['answer_type'] == 'eng')
        $("#kana").attr("placeholder", "Meaning")
        wanakana.unbind(input_element);
      else
        $("#kana").attr("placeholder", "かな")
        wanakana.bind(input_element);
      document.getElementById('view-on-wk').href ="https://www.wanikani.com/" + selection['item_type'] + "/" + selection['question']

updateQuizItemStats = () ->
  $('#radical-num').text(sessionStorage.getItem('radical_count'));
  $('#kanji-num').text(sessionStorage.getItem('kanji_count'));
  $('#vocab-num').text(sessionStorage.getItem('vocabulary_count'));
  $('#total-num').text(parseInt(sessionStorage.getItem('radical_count')) + parseInt(sessionStorage.getItem('kanji_count'))+ parseInt(sessionStorage.getItem('vocabulary_count')))

getSrsTypeFilters = () ->
  srs_levels = ['burnedcheck','enlightencheck','mastercheck','gurucheck','apprenticecheck']
  return (document.getElementById(s).value for s in srs_levels when document.getElementById(s).checked).toString()

getItemTypeFilters = () ->
  item_types = ['radicalcheck', 'kanjicheck', 'vocabcheck']
  return (document.getElementById(s).value for s in item_types when document.getElementById(s).checked).toString()

filterQuestions = () ->
  sessionStorage.removeItem('user_items')
  sessionStorage.removeItem('radical_count')
  sessionStorage.removeItem('kanji_count')
  sessionStorage.removeItem('vocabulary_count')
  target_url = "/user_items?level_range=" + $('#filter-input').val() + "&item_state=" + getSrsTypeFilters() + "&item_types=" + getItemTypeFilters()
  $.ajax
    url: target_url,
    dataType: 'json',
    success: (e) ->
      if(e.hasOwnProperty('error'))
        document.getElementById('filter-input').value = ''
        $('#error-text').text(e['error'])
        $('#error-area').show();
      else
        sessionStorage.setItem('user_items', JSON.stringify(e['item_list']))
        sessionStorage.setItem('radical_count', e['radical_count'])
        sessionStorage.setItem('kanji_count', e['kanji_count'])
        sessionStorage.setItem('vocabulary_count', e['vocabulary_count'])
        updateQuizItemStats()
        refreshQuestion()

$('#filter-form').submit( (e) ->
  e.preventDefault()
  $('#error-area').hide()
  filterQuestions()
  $('#modal-filter').modal('hide')
  linearCount = 0
)

toggleQuizMode = () ->
  linearMode = !linearMode
  if linearMode
    document.getElementById('quiz-counter').style.visibility = "visible"
    $('#mode-toggle').text("Linear Mode")
  else
    linearCount = 0
    document.getElementById('quiz-counter').style.visibility = "hidden"
    $('#mode-toggle').text("Random Mode")
  refreshQuestion()

refreshQuizCounter = () ->
  document.getElementById('current-quiz').value = linearCount
  document.getElementById('total-quiz').textContent = "/" + itemMax

$(document).keypress (e) ->
    if(e.which == 13)
      $("#submit-answer").click();
    else
      if($("#kana").hasClass("wrong"))
        $("#kana").removeClass("wrong")

$("#submit-answer").click (e) ->
    e.preventDefault();
    if($("#kana").hasClass("correct"))
      refreshQuestion();
    else
      input_answer = document.getElementById('kana').value;
      expected_answer = selection['answer'].split(/[,\.]/g).map((x) -> x.trim())
      if(selection["item_type"] == "radical")
        expected_answer = expected_answer.map((x) -> x.replace("-", " "))
      if(expected_answer.indexOf(input_answer) != -1)
        $("#kana").addClass("correct").removeClass("wrong");
      else
        $("#kana").addClass("wrong").removeClass("correct").val('')

$("#get-help").click (e) ->
  e.preventDefault();
  $("#answer").removeClass('hidden');

$("#api-refresh").click (e) ->
  e.preventDefault();
  $("#api-refresh").find('span').addClass('glyphicon-spin');
  $.post("/refresh").success(() ->
    refreshQuestion();
    $("#api-refresh").find('span').removeClass('glyphicon-spin');
    $('#success-area').show();
  ).fail(() ->
    $('#error-area').show();
    $('#error-text').text("Cannot refresh API. Try again later.")
    $("#api-refresh").find('span').removeClass('glyphicon-spin');
  );

$('#error-area').find('button').click () ->
  $('#error-area').hide()

$('#success-area').find('button').click () ->
  $('#success-area').hide()

$('#skip-to-item').click (e) ->
  e.preventDefault()
  targetValue = document.getElementById('current-quiz').value - 1
  if(targetValue >= 0 && targetValue < itemMax)
    linearCount = targetValue
    refreshQuestion()
  else
    refreshQuizCounter()

$ ->
  $(document).ready ->
    $('[data-toggle="tooltip"]').tooltip();
    document.getElementById('mode-toggle').onclick = toggleQuizMode
    filterQuestions()