var SelectData = require('select2/data/select');
var $ = require('jquery');
var Options = require('select2/options');

var options = new Options({});

module('Data adapters - Select - current');

test('current gets default for single', function (assert) {
  var $select = $('#qunit-fixture .single');

  var data = new SelectData($select, options);

  data.current(function (val) {
    assert.deepEqual(
      val,
      [{
        id: 'default',
        text: 'Default',
        disabled: false
      }],
      'The first option should be selected by default (by the browser).'
    );
  });
});

test('current gets default for multiple', function (assert) {
  var $select = $('#qunit-fixture .multiple');

  var data = new SelectData($select, options);

  data.current(function (val) {
    assert.deepEqual(
      val,
      [],
      'Multiple selects have no default selection.'
    );
  });
});

test('current gets options with explicit value', function (assert) {
  var $select = $('#qunit-fixture .single');

  var data = new SelectData($select, options);

  $select.val('1');

  data.current(function (val) {
    assert.deepEqual(
      val,
      [{
        id: '1',
        text: 'One',
        disabled: false
      }],
      'The text and id should match the value and text for the option tag.'
    );
  });
});

test('current gets options with implicit value', function (assert) {
  var $select = $('#qunit-fixture .single');

  var data = new SelectData($select, options);

  $select.val('2');

  data.current(function (val) {
    assert.deepEqual(
      val,
      [{
        id: '2',
        text: '2',
        disabled: false
      }],
      'The text and id should match the text within the option tag.'
    );
  });
});

test('select works for single', function (assert) {
  var $select = $('#qunit-fixture .single');

  var data = new SelectData($select, options);

  assert.equal($select.val(), 'default');

  data.select({
    id: '1',
    text: 'One'
  });

  assert.equal($select.val(), '1');
});

test('multiple sets the value', function (assert) {
  var $select = $('#qunit-fixture .multiple');

  var data = new SelectData($select, options);

  assert.equal($select.val(), null);

  data.select({
    id: 'default',
    text: 'Default'
  });

  assert.deepEqual($select.val(), ['default']);
});

test('multiple adds to the old value', function (assert) {
  var $select = $('#qunit-fixture .multiple');

  var data = new SelectData($select, options);

  $select.val(['2']);

  assert.deepEqual($select.val(), ['2']);

  data.select({
    id: 'default',
    text: 'Default'
  });

  assert.deepEqual($select.val(), ['default', '2']);
});

module('Data adapter - Select - query');

test('all options are returned with no term', function (assert) {
  var $select = $('#qunit-fixture .single');

  var data = new SelectData($select, options);

  data.query({}, function (data) {
    assert.equal(
      data.length,
      3,
      'The number of items returned should be equal to the number of options'
    );
  });
});

test('the matcher checks the text', function (assert) {
  var $select = $('#qunit-fixture .single');

  var data = new SelectData($select, options);

  data.query({
    term: 'Default'
  }, function (data) {
    assert.equal(
      data.length,
      1,
      'Only the "Default" option should be found'
    );
  });
});

test('the matcher ignores case', function (assert) {
  var $select = $('#qunit-fixture .single');

  var data = new SelectData($select, options);

  data.query({
    term: 'one'
  }, function (data) {
    assert.equal(
      data.length,
      1,
      'The "One" option should still be found'
    );
  });
});

test('no options may be returned with no matches', function (assert) {
  var $select = $('#qunit-fixture .single');

  var data = new SelectData($select, options);

  data.query({
    term: 'qwerty'
  }, function (data) {
    assert.equal(
      data.length,
      0,
      'Only matching items should be returned'
    );
  });
});

test('optgroup tags are marked with children', function (assert) {
  var $select = $('#qunit-fixture .groups');

  var data = new SelectData($select, options);

  data.query({}, function (data) {
    assert.ok(
      'children' in data[0],
      'The optgroup element should have children when queried'
    );
  });
});

test('empty optgroups are still shown when queried', function (assert) {
  var $select = $('#qunit-fixture .groups');

  var data = new SelectData($select, options);

  data.query({}, function (data) {
    assert.deepEqual(
      data[1],
      {
        text: 'Empty',
        children: []
      },
      'The empty optgroup element should still be returned when queried'
    );
  });
});