<?php

namespace Test\Icinga\Web\Form\Element;
use Icinga\Test\BaseTestCase;

require_once 'Zend/Form/Element/Text.php';
require_once 'Zend/Form/Element/Xhtml.php';
require_once realpath(__DIR__ . '/../../../../../../../library/Icinga/Test/BaseTestCase.php');
require_once realpath(BaseTestCase::$libDir . '/Application/Icinga.php');
require_once realpath(BaseTestCase::$libDir . '/Web/Form/Element/DateTimePicker.php');
require_once realpath(BaseTestCase::$libDir . '/Web/Form/Validator/DateTimeValidator.php');
require_once realpath(BaseTestCase::$libDir . '/Util/ConfigAwareFactory.php');
require_once realpath(BaseTestCase::$libDir . '/Util/DateTimeFactory.php');

use \DateTimeZone;
use Icinga\Form\Config\Authentication\BaseBackendForm;
use \Icinga\Web\Form\Element\DateTimePicker;
use \Icinga\Util\DateTimeFactory;

class DateTimeTest extends BaseTestCase
{
    public function setUp()
    {
        // Set default timezone else new DateTime calls will die with the Exception that it's
        // not safe to rely on the system's timezone
        date_default_timezone_set('UTC');
    }

    /**
     * Test that DateTimePicker::isValid() returns false if the input is not valid in terms of being a date/time string
     * or a timestamp
     *
     * Utilizes singleton DateTimeFactory
     *
     * @backupStaticAttributes enabled
     */
    public function testValidateInvalidInput()
    {
        DateTimeFactory::setConfig(array('timezone' => new DateTimeZone('UTC')));

        $dt = new DateTimePicker(
            'foo',
            array(
                'patterns' => array(
                    'd/m/Y g:i A',
                    'd.m.Y H:i:s'
                )
            )
        );

        $this->assertFalse(
            $dt->isValid('08/27/2013 12:40 PM'),
            'Wrong placed month/day must not be valid input'
        );
        $this->assertFalse(
            $dt->isValid('bar'),
            'Arbitrary strings must not be valid input'
        );
        $this->assertFalse(
            $dt->isValid('12:40 AM'),
            'Time strings must not be valid input'
        );
        $this->assertFalse(
            $dt->isValid('27/08/2013'),
            'Date strings must not be valid input'
        );
        $this->assertFalse(
            $dt->isValid('13736a16223'),
            'Invalid Unix timestamps must not be valid input'
        );
    }

    /**
     * Test that DateTimePicker::isValid() returns true if the input is valid in terms of being a date/time string
     * or a timestamp
     *
     * Utilizes singleton DateTimeFactory
     *
     * @backupStaticAttributes enabled
     */
    public function testValidateValidInput()
    {
        DateTimeFactory::setConfig(array('timezone' => new DateTimeZone('UTC')));

        $dt = new DateTimePicker(
            'foo',
            array(
                'patterns' => array(
                    'd/m/Y g:i A',
                    'd.m.Y H:i:s'
                )
            )
        );

        $this->assertTrue(
            $dt->isValid('27/08/2013 12:40 PM'),
            'Using a valid date/time string must not fail'
        );
        $this->assertTrue(
            $dt->isValid('12.07.2013 08:03:43'),
            'Using a valid date/time string must not fail'
        );
        $this->assertTrue(
            $dt->isValid(1373616223),
            'Using valid Unix timestamps must not fail'
        );
        $this->assertTrue(
            $dt->isValid('1373616223'),
            'Using strings as Unix timestamps must not fail'
        );
    }

    /**
     * Test that DateTimePicker::getValue() returns a timestamp after a successful call to isValid
     *
     * Utilizes singleton DateTimeFactory
     *
     * @backupStaticAttributes enabled
     */
    public function testGetValueReturnsUnixTimestampAfterSuccessfulIsValidCall()
    {
        DateTimeFactory::setConfig(array('timezone' => new DateTimeZone('UTC')));

        $dt = new DateTimePicker(
            'foo',
            array(
                'patterns' => array(
                    'd.m.Y H:i:s'
                )
            )
        );
        $dt->isValid('12.07.2013 08:03:43');

        $this->assertEquals(
            1373616223,
            $dt->getValue(),
            'getValue did not return the correct Unix timestamp according to the given date/time string'
        );
    }

    /**
     * Test that DateTimePicker::getValue() returns a timestamp respecting
     * the given non-UTC time zone after a successful call to isValid
     *
     * Utilizes singleton DateTimeFactory
     *
     * @backupStaticAttributes enabled
     */
    public function testGetValueIsTimeZoneAware()
    {
        DateTimeFactory::setConfig(array('timezone' => new DateTimeZone('Europe/Berlin')));

        $dt = new DateTimePicker(
            'foo',
            array(
                'patterns' => array(
                    'd.m.Y H:i:s'
                )
            )
        );
        $dt->isValid('12.07.2013 08:03:43');

        $this->assertEquals(
            1373609023,
            $dt->getValue(),
            'getValue did not return the correct Unix timestamp according to the given date/time string and time zone'
        );
    }
}