$(document).ready(function () {
  'use strict';

  $('#dictionary').load('exercises-content.html div');

  $('#letter-a a').click(function (event) {
    event.preventDefault();

    $.ajaxSetup({
      url: 'a.html',
      type: 'POST',
      dataType: 'html'
    });

    $.ajax({
      type: 'GET',
      success: function (data) {
        $('#dictionary').html(data);
      }
    });
  });

  $('#letter-b a').click(function (event) {
    event.preventDefault();
    $.getJSON('b.json', function (data) {
      var html = '';
      $.each(data, function (entryIndex, entry) {
        html += '<div class="entry">';
        html += '<h3 class="term">' + entry.term + '</h3>';
        html += '<div class="part">' + entry.part + '</div>';
        html += '<div class="definition">';
        html += entry.definition;
        if (entry.quote) {
          html += '<div class="quote">';
          $.each(entry.quote, function (lineIndex, line) {
            html += '<div class="quote-line">' + line + '</div>';
          });
          if (entry.author) {
            html += '<div class="quote-author">' + entry.author + '</div>';
          }
          html += '</div>';
        }
        html += '</div>';
        html += '</div>';
      });
      $('#dictionary').html(html);
    });
  });

  $('#letter-c a').click(function (event) {
    event.preventDefault();
    $.getScript('c.js');
  });

  $('#letter-d a').click(function (event) {
    event.preventDefault();
    $.get('d.xml', function (data) {
      $('#dictionary').empty();
      $(data).find('entry').each(function() {
        var $entry = $(this);
        var html = '<div class="entry">';
        html += '<h3 class="term">' + $entry.attr('term');
        html += '</h3>';
        html += '<div class="part">' + $entry.attr('part');
        html += '</div>';
        html += '<div class="definition">';
        html += $entry.find('definition').text();
        var $quote = $entry.find('quote');
        if ($quote.length) {
          html += '<div class="quote">';
          $quote.find('line').each(function () {
            html += '<div class="quote-line">';
            html += $(this).text() + '</div>';
          });
          if ($quote.attr('author')) {
            html += '<div class="quote-author">';
            html += $quote.attr('author') + '</div>';
          }
          html += '</div>';
        }
        html += '</div>';
        html += '</div>';
        $('#dictionary').append($(html));
      });
    });
  });

  $('#letter-e a').click(function (event) {
    event.preventDefault();
    var requestData = { term: $(this).text() };
    $.get('e.php', requestData, function(data) {
      $('#dictionary').html(data);
    }).fail(function (jqXHR) {
      $('#dictionary')
        .html('Sorry, but an error occurred: ' + jqXHR.status)
        .append(jqXHR.responseText);
    });
  });

  $('#letter-f form').submit(function (event) {
    event.preventDefault();
    var formValues = $(this).serialize();
    $.get('f.php', formValues, function(data) {
      $('#dictionary').html(data);
    });
  });

  var url = 'http://examples.learningjquery.com/jsonp/g.php';
  $('#letter-g a').click(function (event) {
    event.preventDefault();
    $.getJSON(url + '?callback=?', function (data) {
      var html = '';
      $.each(data, function (entryIndex, entry) {
        html += '<div class="entry">';
        html += '<h3 class="term">' + entry.term + '</h3>';
        html += '<div class="part">' + entry.part + '</div>';
        html += '<div class="definition">';
        html += entry.definition;
        if (entry.quote) {
          html += '<div class="quote">';
          $.each(entry.quote, function (lineIndex, line) {
            html += '<div class="quote-line">' + line + '</div>';
          });
          if (entry.author) {
            html += '<div class="quote-author">' + entry.author + '</div>';
          }
          html += '</div>';
        }
        html += '</div>';
        html += '</div>';
      });
      $('#dictionary').html(html);
    });
  });

  $('#letter-h a').click(function (event) {
    event.preventDefault();
    $('#dictionary').load('h.html .entry');
  });

  var $loading = $('<div id="loading">Loading...</div>')
    .insertBefore('#dictionary');

  $(document).ajaxStart(function () {
    $loading.show();
  }).ajaxStop(function () {
    $loading.hide();
  });

  $('body').on('click', 'h3.term', function () {
    $(this).siblings('.definition').slideToggle();
  });
});