// Copyright 2008 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

goog.provide('goog.ui.DatePickerTest');
goog.setTestOnly('goog.ui.DatePickerTest');

goog.require('goog.a11y.aria');
goog.require('goog.a11y.aria.Role');
goog.require('goog.date.Date');
goog.require('goog.date.DateRange');
goog.require('goog.dom');
goog.require('goog.dom.TagName');
goog.require('goog.dom.classlist');
goog.require('goog.events');
goog.require('goog.i18n.DateTimeSymbols');
goog.require('goog.i18n.DateTimeSymbols_en_US');
goog.require('goog.i18n.DateTimeSymbols_zh_HK');
goog.require('goog.style');
goog.require('goog.testing.jsunit');
goog.require('goog.ui.DatePicker');

var picker;
var $$ = goog.dom.getElementsByTagNameAndClass;
var sandbox;

function setUpPage() {
  sandbox = goog.dom.getElement('sandbox');
}

function tearDown() {
  picker.dispose();
  goog.dom.removeChildren(sandbox);
}

function testIsMonthOnLeft() {
  goog.i18n.DateTimeSymbols = goog.i18n.DateTimeSymbols_en_US;
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  var head = $$('tr', 'goog-date-picker-head')[0];
  var month = $$('button', 'goog-date-picker-month',
      head.firstChild)[0];
  assertSameElements(
      'Button element must have expected class names',
      ['goog-date-picker-btn', 'goog-date-picker-month'],
      goog.dom.classlist.get(month)
  );
}

function testIsYearOnLeft() {
  goog.i18n.DateTimeSymbols = goog.i18n.DateTimeSymbols_zh_HK;
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  var head = $$('tr', 'goog-date-picker-head')[0];
  var year = $$('button', 'goog-date-picker-year',
      head.firstChild)[0];
  assertSameElements(
      'Button element must have expected class names',
      ['goog-date-picker-btn', 'goog-date-picker-year'],
      goog.dom.classlist.get(year)
  );
}

function testHidingOfTableFoot0() {
  picker = new goog.ui.DatePicker();
  picker.setAllowNone(false);
  picker.setShowToday(false);
  picker.create(sandbox);
  var tFoot = $$('tfoot')[0];
  assertFalse(goog.style.isElementShown(tFoot));
}

function testHidingOfTableFoot1() {
  picker = new goog.ui.DatePicker();
  picker.setAllowNone(false);
  picker.setShowToday(true);
  picker.create(sandbox);
  var tFoot = $$('tfoot')[0];
  assertTrue(goog.style.isElementShown(tFoot));
}

function testHidingOfTableFoot2() {
  picker = new goog.ui.DatePicker();
  picker.setAllowNone(true);
  picker.setShowToday(false);
  picker.create(sandbox);
  var tFoot = $$('tfoot')[0];
  assertTrue(goog.style.isElementShown(tFoot));
}

function testHidingOfTableFoot3() {
  picker = new goog.ui.DatePicker();
  picker.setAllowNone(true);
  picker.setShowToday(true);
  picker.create(sandbox);
  var tFoot = $$('tfoot')[0];
  assertTrue(goog.style.isElementShown(tFoot));
}

function testHidingOfTableFootAfterCreate0() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setAllowNone(false);
  picker.setShowToday(false);
  var tFoot = $$('tfoot')[0];
  assertFalse(goog.style.isElementShown(tFoot));
}

function testHidingOfTableFootAfterCreate1() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setAllowNone(false);
  picker.setShowToday(true);
  var tFoot = $$('tfoot')[0];
  assertTrue(goog.style.isElementShown(tFoot));
}

function testHidingOfTableFootAfterCreate2() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setAllowNone(true);
  picker.setShowToday(false);
  var tFoot = $$('tfoot')[0];
  assertTrue(goog.style.isElementShown(tFoot));
}

function testHidingOfTableFootAfterCreate3() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setAllowNone(true);
  picker.setShowToday(true);
  var tFoot = $$('tfoot')[0];
  assertTrue(goog.style.isElementShown(tFoot));
}

function testLongDateFormat() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setLongDateFormat(true);
  var dates = $$('td', 'goog-date-picker-date');
  for (var i = 0; i < dates.length; i++) {
    assertEquals(2, goog.dom.getTextContent(dates[i]).length);
  }
}

function testGetActiveMonth() {
  picker = new goog.ui.DatePicker(new Date(2000, 5, 5));
  var month = picker.getActiveMonth();
  assertObjectEquals(new goog.date.Date(2000, 5, 1), month);

  month.setMonth(10);
  assertObjectEquals('modifying the returned object is safe',
      new goog.date.Date(2000, 5, 1), picker.getActiveMonth());
}

function testGetDate() {
  picker = new goog.ui.DatePicker(new Date(2000, 0, 1));
  var date = picker.getDate();
  assertObjectEquals(new goog.date.Date(2000, 0, 1), date);

  date.setMonth(1);
  assertObjectEquals('modifying the returned date is safe',
      new goog.date.Date(2000, 0, 1), picker.getDate());

  picker.setDate(null);
  assertNull('no date is selected', picker.getDate());
}

function testGetDateAt() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setDate(new Date(2000, 5, 5));
  var date = picker.getDateAt(0, 0);
  assertTrue(date.equals(picker.grid_[0][0]));

  date.setMonth(1);
  assertFalse(date.equals(picker.grid_[0][0]));
}

function testGetDateAt_NotInGrid() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setDate(new Date(2000, 5, 5));
  var date = picker.getDateAt(-1, 0);
  assertNull(date);

  date = picker.getDateAt(0, -1);
  assertNull(date);
}

function testGetDateElementAt() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setDate(new Date(2000, 5, 5));
  var element = picker.getDateElementAt(0, 0);
  assertEquals('td', element.tagName.toLowerCase());
  assertObjectEquals(element, picker.elTable_[1][1]);
}

function testGetDateElementAt_NotInTable() {
  picker = new goog.ui.DatePicker();
  picker.create(sandbox);
  picker.setDate(new Date(2000, 5, 5));
  var element = picker.getDateElementAt(-1, 0);
  assertNull(element);

  element = picker.getDateElementAt(0, -1);
  assertNull(element);

  element = picker.getDateElementAt(picker.elTable_.length - 1, 0);
  assertNull(element);

  element = picker.getDateElementAt(0, picker.elTable_[0].length - 1);
  assertNull(element);
}

function testSetDate() {
  picker = new goog.ui.DatePicker();
  picker.createDom();
  picker.enterDocument();
  var selectEvents = 0;
  var changeEvents = 0;
  var changeActiveMonthEvents = 0;
  goog.events.listen(picker, goog.ui.DatePicker.Events.SELECT,
      function() {
        selectEvents++;
      });
  goog.events.listen(picker, goog.ui.DatePicker.Events.CHANGE,
      function() {
        changeEvents++;
      });
  goog.events.listen(picker, goog.ui.DatePicker.Events.CHANGE_ACTIVE_MONTH,
      function() {
        changeActiveMonthEvents++;
      });

  // Set date.
  picker.setDate(new Date(2010, 1, 26));
  assertEquals('no select event dispatched', 1, selectEvents);
  assertEquals('no change event dispatched', 1, changeEvents);
  assertEquals('no change active month event dispatched',
      1, changeActiveMonthEvents);
  assertTrue('date is set',
      new goog.date.Date(2010, 1, 26).equals(picker.getDate()));

  // Set date to same date.
  picker.setDate(new Date(2010, 1, 26));
  assertEquals('1 select event dispatched', 2, selectEvents);
  assertEquals('no change event dispatched', 1, changeEvents);
  assertEquals('no change active month event dispatched',
      1, changeActiveMonthEvents);

  // Set date to different date.
  picker.setDate(new Date(2010, 1, 27));
  assertEquals('another select event dispatched', 3, selectEvents);
  assertEquals('1 change event dispatched', 2, changeEvents);
  assertEquals('2 change active month events dispatched',
      1, changeActiveMonthEvents);

  // Set date to a date in a different month.
  picker.setDate(new Date(2010, 2, 27));
  assertEquals('another select event dispatched', 4, selectEvents);
  assertEquals('another change event dispatched', 3, changeEvents);
  assertEquals('3 change active month event dispatched',
      2, changeActiveMonthEvents);

  // Set date to none.
  picker.setDate(null);
  assertEquals('another select event dispatched', 5, selectEvents);
  assertEquals('another change event dispatched', 4, changeEvents);
  assertNull('date cleared', picker.getDate());
}

function testChangeActiveMonth() {
  picker = new goog.ui.DatePicker();
  var changeActiveMonthEvents = 0;
  goog.events.listen(picker, goog.ui.DatePicker.Events.CHANGE_ACTIVE_MONTH,
      function() {
        changeActiveMonthEvents++;
      });

  // Set date.
  picker.setDate(new Date(2010, 1, 26));
  assertEquals('no change active month event dispatched',
      1, changeActiveMonthEvents);
  assertTrue('date is set',
      new goog.date.Date(2010, 1, 26).equals(picker.getDate()));

  // Change to next month.
  picker.nextMonth();
  assertEquals('1 change active month event dispatched',
      2, changeActiveMonthEvents);
  assertTrue('date should still be the same',
      new goog.date.Date(2010, 1, 26).equals(picker.getDate()));

  // Change to next year.
  picker.nextYear();
  assertEquals('2 change active month events dispatched',
      3, changeActiveMonthEvents);

  // Change to previous month.
  picker.previousMonth();
  assertEquals('3 change active month events dispatched',
      4, changeActiveMonthEvents);

  // Change to previous year.
  picker.previousYear();
  assertEquals('4 change active month events dispatched',
      5, changeActiveMonthEvents);
}

function testUserSelectableDates() {
  var dateRange = new goog.date.DateRange(
      new goog.date.Date(2010, 1, 25), new goog.date.Date(2010, 1, 27));
  picker = new goog.ui.DatePicker();
  picker.setUserSelectableDateRange(dateRange);
  assertFalse('should not be selectable date',
              picker.isUserSelectableDate_(new goog.date.Date(2010, 1, 24)));
  assertTrue('should be a selectable date',
      picker.isUserSelectableDate_(new goog.date.Date(2010, 1, 25)));
  assertTrue('should be a selectable date',
      picker.isUserSelectableDate_(new goog.date.Date(2010, 1, 26)));
  assertTrue('should be a selectable date',
      picker.isUserSelectableDate_(new goog.date.Date(2010, 1, 27)));
  assertFalse('should not be selectable date',
              picker.isUserSelectableDate_(new goog.date.Date(2010, 1, 28)));
}

function testUniqueCellIds() {
  picker = new goog.ui.DatePicker();
  picker.render();
  var cells = goog.dom.getElementsByTagNameAndClass(
      goog.dom.TagName.TD, undefined, picker.getElement());
  var existingIds = {};
  var numCells = cells.length;
  for (var i = 0; i < numCells; i++) {
    assertNotNull(cells[i]);
    if (goog.a11y.aria.getRole(cells[i]) == goog.a11y.aria.Role.GRIDCELL) {
      assertNonEmptyString('cell id is non empty', cells[i].id);
      assertUndefined('cell id is not unique',
          existingIds[cells[i].id]);
      existingIds[cells[i].id] = 1;
    }
  }
}

function testDecoratePreservesClasses() {
  picker = new goog.ui.DatePicker();
  var div = goog.dom.createDom(goog.dom.TagName.DIV, 'existing-class');
  picker.decorate(div);
  assertTrue(goog.dom.classlist.contains(div, picker.getBaseCssClass()));
  assertTrue(goog.dom.classlist.contains(div, 'existing-class'));
}
