<?php
/**
 * Base class for Selenium tests
 */

declare(strict_types=1);

namespace PhpMyAdmin\Tests\Selenium;

use Closure;
use Exception;
use Facebook\WebDriver\Chrome\ChromeOptions;
use Facebook\WebDriver\Exception\InvalidSelectorException;
use Facebook\WebDriver\Exception\NoSuchElementException;
use Facebook\WebDriver\Exception\WebDriverException;
use Facebook\WebDriver\Remote\DesiredCapabilities;
use Facebook\WebDriver\Remote\RemoteWebDriver;
use Facebook\WebDriver\Remote\RemoteWebElement;
use Facebook\WebDriver\WebDriverBy;
use Facebook\WebDriver\WebDriverElement;
use Facebook\WebDriver\WebDriverExpectedCondition;
use Facebook\WebDriver\WebDriverSelect;
use InvalidArgumentException;
use PHPUnit\Framework\TestCase;
use Throwable;

use function curl_close;
use function curl_errno;
use function curl_error;
use function curl_exec;
use function curl_init;
use function curl_setopt;
use function current;
use function end;
use function file_put_contents;
use function getenv;
use function is_bool;
use function is_string;
use function json_decode;
use function json_encode;
use function mb_strtolower;
use function mb_substr;
use function preg_match;
use function rand;
use function reset;
use function sha1;
use function sprintf;
use function strlen;
use function substr;
use function time;
use function trim;
use function usleep;

use const CURLOPT_CUSTOMREQUEST;
use const CURLOPT_HTTPHEADER;
use const CURLOPT_POSTFIELDS;
use const CURLOPT_RETURNTRANSFER;
use const CURLOPT_URL;
use const CURLOPT_USERPWD;
use const DIRECTORY_SEPARATOR;
use const JSON_PRETTY_PRINT;
use const JSON_UNESCAPED_SLASHES;
use const PHP_EOL;

/**
 * Base class for Selenium tests.
 *
 * @group      selenium
 */
abstract class TestBase extends TestCase
{
    /** @var RemoteWebDriver */
    protected $webDriver;

    /**
     * Name of database for the test
     *
     * @access public
     * @var string
     */
    public $databaseName;

    /**
     * The session Id (Browserstack)
     *
     * @var string
     */
    protected $sessionId;

    /**
     * The window handle for the SQL tab
     *
     * @var string|null
     */
    private $sqlWindowHandle = null;

    private const SESSION_REST_URL = 'https://api.browserstack.com/automate/sessions/';

    /**
     * Create a test database for this test class
     *
     * @var bool
     */
    protected static $createDatabase = true;

    /**
     * Did the test create the phpMyAdmin storage database ?
     *
     * @var bool
     */
    private $hadStorageDatabaseInstall = false;

    /**
     * Configures the selenium and database link.
     *
     * @throws Exception
     */
    protected function setUp(): void
    {
        /**
         * Needs to be implemented
         *
         * @ENV TESTSUITE_SELENIUM_COVERAGE
         * @ENV TESTSUITE_FULL
         */
        parent::setUp();

        if ($this->getHubUrl() === '') {
            $this->markTestSkipped('Selenium testing is not configured.');
        }

        if ($this->getTestSuiteUrl() === '') {
            $this->markTestSkipped('The ENV "TESTSUITE_URL" is not defined.');
        }

        if ($this->getTestSuiteUserLogin() === '') {
            //TODO: handle config mode
            $this->markTestSkipped(
                'The ENV "TESTSUITE_USER" is not defined, you may also want to define "TESTSUITE_PASSWORD".'
            );
        }

        $capabilities = $this->getCapabilities();
        $this->addCapabilities($capabilities);
        $url = $this->getHubUrl();

        $this->webDriver = RemoteWebDriver::create(
            $url,
            $capabilities
        );

        // The session Id is only used by BrowserStack
        if ($this->hasBrowserstackConfig()) {
            $this->sessionId = $this->webDriver->getSessionId();
        }

        $this->navigateTo('');
        $this->webDriver->manage()->window()->maximize();

        if (! static::$createDatabase) {
            // Stop here, we where not asked to create a database
            return;
        }

        $this->createDatabase();
    }

    /**
     * Create a test database
     */
    protected function createDatabase(): void
    {
        $this->databaseName = $this->getDbPrefix() . mb_substr(sha1((string) rand()), 0, 7);
        $this->dbQuery(
            'CREATE DATABASE IF NOT EXISTS `' . $this->databaseName . '`; USE `' . $this->databaseName . '`;'
        );
        static::$createDatabase = true;
    }

    public function getDbPrefix(): string
    {
        $envVar = getenv('TESTSUITE_DATABASE_PREFIX');
        if ($envVar) {
            return $envVar;
        }

        return '';
    }

    private function getBrowserStackCredentials(): string
    {
        return getenv('TESTSUITE_BROWSERSTACK_USER') . ':' . getenv('TESTSUITE_BROWSERSTACK_KEY');
    }

    protected function getTestSuiteUserLogin(): string
    {
        $user = getenv('TESTSUITE_USER');

        return $user === false ? '' : $user;
    }

    protected function getTestSuiteUserPassword(): string
    {
        $user = getenv('TESTSUITE_PASSWORD');

        return $user === false ? '' : $user;
    }

    protected function getTestSuiteUrl(): string
    {
        $user = getenv('TESTSUITE_URL');

        return $user === false ? '' : $user;
    }

    /**
     * Has CI config ( CI_MODE == selenium )
     */
    public function hasCIConfig(): bool
    {
        $mode = getenv('CI_MODE');
        if (empty($mode)) {
            return false;
        }

        return $mode === 'selenium';
    }

    /**
     * Has ENV variables set for Browserstack
     */
    public function hasBrowserstackConfig(): bool
    {
        return ! empty(getenv('TESTSUITE_BROWSERSTACK_USER'))
            && ! empty(getenv('TESTSUITE_BROWSERSTACK_KEY'));
    }

    /**
     * Has ENV variables set for local Selenium server
     */
    public function hasSeleniumConfig(): bool
    {
        return ! empty(getenv('TESTSUITE_SELENIUM_HOST'))
            && ! empty(getenv('TESTSUITE_SELENIUM_PORT'));
    }

    /**
     * Get the selenium hub url
     */
    private function getHubUrl(): string
    {
        if ($this->hasBrowserstackConfig()) {
            return 'https://'
            . $this->getBrowserStackCredentials() .
            '@hub-cloud.browserstack.com/wd/hub';
        }

        if ($this->hasSeleniumConfig()) {
            return 'http://'
            . getenv('TESTSUITE_SELENIUM_HOST') . ':'
            . getenv('TESTSUITE_SELENIUM_PORT') . '/wd/hub';
        }

        return '';
    }

    /**
     * Navigate to URL
     *
     * @param string $url The URL
     */
    private function navigateTo(string $url): void
    {
        $suiteUrl = getenv('TESTSUITE_URL');
        if ($suiteUrl === false) {
            $suiteUrl = '';
        }

        if (substr($suiteUrl, -1) === '/') {
            $url = $suiteUrl . $url;
        } else {
            $url = $suiteUrl . '/' . $url;
        }

        $this->webDriver->get($url);
    }

    /**
     * Get the current running test name
     *
     * Usefull for browserstack
     *
     * @see https://github.com/phpmyadmin/phpmyadmin/pull/14595#issuecomment-418541475
     * Reports the name of the test to browserstack
     */
    public function getTestName(): string
    {
        $className = substr(static::class, strlen('PhpMyAdmin\Tests\Selenium\\'));

        return $className . ': ' . $this->getName();
    }

    /**
     * Add specific capabilities
     *
     * @param DesiredCapabilities $capabilities The capabilities object
     */
    public function addCapabilities(DesiredCapabilities $capabilities): void
    {
        $buildLocal = true;
        $buildId = 'Manual';
        $projectName = 'phpMyAdmin';

        if (getenv('BUILD_TAG')) {
            $buildId = getenv('BUILD_TAG');
            $buildLocal = false;
            $projectName = 'phpMyAdmin (Jenkins)';
        } elseif (getenv('GITHUB_ACTION')) {
            $buildId = 'github-' . getenv('GITHUB_ACTION');
            $buildLocal = true;
            $projectName = 'phpMyAdmin (GitHub - Actions)';
        }

        if (! $buildLocal) {
            return;
        }

        $capabilities->setCapability(
            'bstack:options',
            [
                'os' => 'Windows',
                'osVersion' => '10',
                'resolution' => '1920x1080',
                'projectName' => $projectName,
                'sessionName' => $this->getTestName(),
                'buildName' => $buildId,
                'localIdentifier' => $buildId,
                'local' => $buildLocal,
                'debug' => false,
                'consoleLogs' => 'verbose',
                'networkLogs' => true,
            ]
        );
    }

    /**
     * Get basic capabilities
     */
    public function getCapabilities(): DesiredCapabilities
    {
        switch (getenv('TESTSUITE_SELENIUM_BROWSER')) {
            case 'chrome':
            default:
                $capabilities = DesiredCapabilities::chrome();
                $chromeOptions = new ChromeOptions();
                $chromeOptions->addArguments(['--lang=en']);
                $capabilities->setCapability(
                    ChromeOptions::CAPABILITY_W3C,
                    $chromeOptions
                );
                $capabilities->setCapability(
                    'loggingPrefs',
                    ['browser' => 'ALL']
                );

                if ($this->hasCIConfig() && $this->hasBrowserstackConfig()) {
                    $capabilities->setCapability(
                        'os',
                        'Windows' // Force windows
                    );
                    $capabilities->setCapability(
                        'os_version',
                        '10' // Force windows 10
                    );
                    $capabilities->setCapability(
                        'browser_version',
                        '80.0' // Force chrome 80.0
                    );
                    $capabilities->setCapability(
                        'resolution',
                        '1920x1080'
                    );
                }

                return $capabilities;

            case 'safari':
                $capabilities = DesiredCapabilities::safari();
                if ($this->hasCIConfig() && $this->hasBrowserstackConfig()) {
                    $capabilities->setCapability(
                        'os',
                        'OS X' // Force OS X
                    );
                    $capabilities->setCapability(
                        'os_version',
                        'Sierra' // Force OS X Sierra
                    );
                    $capabilities->setCapability(
                        'browser_version',
                        '10.1' // Force Safari 10.1
                    );
                }

                return $capabilities;

            case 'edge':
                $capabilities = DesiredCapabilities::microsoftEdge();
                if ($this->hasCIConfig() && $this->hasBrowserstackConfig()) {
                    $capabilities->setCapability(
                        'os',
                        'Windows' // Force windows
                    );
                    $capabilities->setCapability(
                        'os_version',
                        '10' // Force windows 10
                    );
                    $capabilities->setCapability(
                        'browser_version',
                        'insider preview' // Force Edge insider preview
                    );
                }

                return $capabilities;
        }
    }

    /**
     * Checks whether the user is a superuser.
     */
    protected function isSuperUser(): bool
    {
        return $this->dbQuery('SELECT COUNT(*) FROM mysql.user');
    }

    /**
     * Skips test if test user is not a superuser.
     */
    protected function skipIfNotSuperUser(): void
    {
        if ($this->isSuperUser()) {
            return;
        }

        $this->markTestSkipped('Test user is not a superuser.');
    }

    /**
     * Use the fix relation button to install phpMyAdmin storage
     */
    protected function fixUpPhpMyAdminStorage(): bool
    {
        $this->navigateTo('index.php?route=/check-relations');

        $fixTextSelector = '//div[@class="alert alert-primary" and contains(., "Create a database named")]/a';
        if ($this->isElementPresent('xpath', $fixTextSelector)) {
            $this->byXPath($fixTextSelector)->click();
            $this->waitAjax();

            return true;
        }

        return false;
    }

    /**
     * Skips test if pmadb is not configured.
     */
    protected function skipIfNotPMADB(): void
    {
        $this->navigateTo('index.php?route=/check-relations');
        $pageContent = $this->waitForElement('id', 'page_content');
        if (
            ! preg_match(
                '/Configuration of pmadb… not OK/i',
                $pageContent->getText()
            )
        ) {
            return;
        }

        if (! $this->fixUpPhpMyAdminStorage()) {
            $this->markTestSkipped(
                'The phpMyAdmin configuration storage is not working.'
            );
        }

        // If it failed the code already has exited with markTestSkipped
        $this->hadStorageDatabaseInstall = true;
    }

    /**
     * perform a login
     *
     * @param string $username Username
     * @param string $password Password
     */
    public function login(string $username = '', string $password = ''): void
    {
        $this->logOutIfLoggedIn();
        if ($username === '') {
            $username = $this->getTestSuiteUserLogin();
        }

        if ($password === '') {
            $password = $this->getTestSuiteUserPassword();
        }

        $this->navigateTo('');
        /* Wait while page */
        while (
            $this->webDriver->executeScript(
                'return document.readyState !== "complete";'
            )
        ) {
            usleep(5000);
        }

        // Return if already logged in
        if ($this->isSuccessLogin()) {
            return;
        }

        // Select English if the Language selector is available
        if ($this->isElementPresent('id', 'languageSelect')) {
            $this->selectByLabel($this->byId('languageSelect'), 'English');
        }

        // Clear the input for Microsoft Edge (remembers the username)
        $this->waitForElement('id', 'input_username')->clear()->click()->sendKeys($username);
        $this->byId('input_password')->click()->sendKeys($password);
        $this->byId('input_go')->click();
    }

    /**
     * Get element by Id
     *
     * @param string $id The element ID
     */
    public function byId(string $id): WebDriverElement
    {
        return $this->webDriver->findElement(WebDriverBy::id($id));
    }

    /**
     * Get element by css selector
     *
     * @param string $selector The element css selector
     */
    public function byCssSelector(string $selector): WebDriverElement
    {
        return $this->webDriver->findElement(WebDriverBy::cssSelector($selector));
    }

    /**
     * Get element by xpath
     *
     * @param string $xpath The xpath
     */
    public function byXPath(string $xpath): WebDriverElement
    {
        return $this->webDriver->findElement(WebDriverBy::xpath($xpath));
    }

    /**
     * Get element by linkText
     *
     * @param string $linkText The link text
     */
    public function byLinkText(string $linkText): WebDriverElement
    {
        return $this->webDriver->findElement(WebDriverBy::linkText($linkText));
    }

    /**
     * Double click
     */
    public function doubleclick(): void
    {
        $this->webDriver->action()->doubleClick()->perform();
    }

    /**
     * Simple click
     */
    public function click(): void
    {
        $this->webDriver->action()->click()->perform();
    }

    /**
     * Get element by byPartialLinkText
     *
     * @param string $partialLinkText The partial link text
     */
    public function byPartialLinkText(string $partialLinkText): WebDriverElement
    {
        return $this->webDriver->findElement(WebDriverBy::partialLinkText($partialLinkText));
    }

    /**
     * Returns true if the browser is safari
     */
    public function isSafari(): bool
    {
        return mb_strtolower($this->webDriver->getCapabilities()->getBrowserName()) === 'safari';
    }

    /**
     * Get element by name
     *
     * @param string $name The name
     */
    public function byName(string $name): WebDriverElement
    {
        return $this->webDriver->findElement(WebDriverBy::name($name));
    }

    /**
     * Checks whether the login is successful
     */
    public function isSuccessLogin(): bool
    {
        return $this->isElementPresent('xpath', '//*[@id="server-breadcrumb"]');
    }

    /**
     * Checks whether the login is unsuccessful
     */
    public function isUnsuccessLogin(): bool
    {
        return $this->isElementPresent('cssSelector', 'div #pma_errors');
    }

    /**
     * Used to go to the homepage
     */
    public function gotoHomepage(): void
    {
        $e = $this->byPartialLinkText('Server: ');
        $e->click();
        $this->waitAjax();
    }

    /**
     * Execute a database query
     *
     * @param string       $query       SQL Query to be executed
     * @param Closure|null $onResults   The function to call when the results are displayed
     * @param Closure|null $afterSubmit The function to call after the submit button is clicked
     *
     * @throws Exception
     */
    public function dbQuery(string $query, ?Closure $onResults = null, ?Closure $afterSubmit = null): bool
    {
        $didSucceed = false;
        $handles = null;

        if (! $this->sqlWindowHandle) {
            $this->webDriver->executeScript("window.open('about:blank','_blank');", []);
            $this->webDriver->wait()->until(
                WebDriverExpectedCondition::numberOfWindowsToBe(2)
            );
            $handles = $this->webDriver->getWindowHandles();

            $lastWindow = end($handles);
            $this->webDriver->switchTo()->window($lastWindow);
            $this->login();
            $this->sqlWindowHandle = $lastWindow;
        }

        if ($handles === null) {
            $handles = $this->webDriver->getWindowHandles();
        }

        if ($this->sqlWindowHandle) {
            $this->webDriver->switchTo()->window($this->sqlWindowHandle);
            if (! $this->isSuccessLogin()) {
                $this->takeScrenshot('SQL_window_not_logged_in');

                return false;
            }

            $this->byXPath('//*[contains(@class,"nav-item") and contains(., "SQL")]')->click();
            $this->waitAjax();
            $this->typeInTextArea($query);
            $this->byId('button_submit_query')->click();
            if ($afterSubmit !== null) {
                $afterSubmit->call($this);
            }

            $this->waitAjax();
            $this->waitForElement('className', 'result_query');
            // If present then
            $didSucceed = $this->isElementPresent('xpath', '//*[@class="result_query"]//*[contains(., "success")]');
            if ($onResults !== null) {
                $onResults->call($this);
            }
        }

        // echo PHP_EOL . 'Query: ' . $query . ', out: ' . (($didSucceed) ? 'yes' : 'no') . PHP_EOL;

        reset($handles);
        $lastWindow = current($handles);
        $this->webDriver->switchTo()->window($lastWindow);

        return $didSucceed;
    }

    public function takeScrenshot(string $comment): void
    {
        $screenshotDir = __DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR
            . '..' . DIRECTORY_SEPARATOR . 'build' . DIRECTORY_SEPARATOR
            . 'selenium';
        if ($this->webDriver === null) {
            return;
        }

        $key = time();

        // This call will also create the file path
        $this->webDriver->takeScreenshot(
            $screenshotDir . DIRECTORY_SEPARATOR
            . 'screenshot_' . $key . '_' . $comment . '.png'
        );
        $htmlOutput = $screenshotDir . DIRECTORY_SEPARATOR . 'source_' . $key . '.html';
        file_put_contents($htmlOutput, $this->webDriver->getPageSource());
        $testInfo = $screenshotDir . DIRECTORY_SEPARATOR . 'source_' . $key . '.json';
        file_put_contents($testInfo, json_encode(
            [
                'filesKey' => $key,
                'testName' => $this->getTestName(),
            ],
            JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES
        ));
    }

    /**
     * Check if user is logged in to phpmyadmin
     *
     * @return bool Where or not user is logged in
     */
    public function isLoggedIn(): bool
    {
        return $this->isElementPresent(
            'xpath',
            '//*[@class="navigationbar"]'
        );
    }

    /**
     * Perform a logout, if logged in
     */
    public function logOutIfLoggedIn(): void
    {
        if (! $this->isLoggedIn()) {
            return;
        }

        $this->byCssSelector('img.icon.ic_s_loggoff')->click();
    }

    /**
     * Wait for an element to be present on the page
     *
     * @param string $func Locate using - cssSelector, xpath, tagName, partialLinkText, linkText, name, id, className
     * @param string $arg  Selector
     *
     * @return WebDriverElement Element waited for
     */
    public function waitForElement(string $func, string $arg): WebDriverElement
    {
        return $this->webDriver->wait(30, 500)->until(
            WebDriverExpectedCondition::presenceOfElementLocated(WebDriverBy::$func($arg))
        );
    }

    /**
     * Wait for an element to be present on the page or timeout
     *
     * @param string $func    Locate using - cssSelector, xpath, tagName, partialLinkText, linkText, name, id, className
     * @param string $arg     Selector
     * @param int    $timeout Timeout in seconds
     */
    public function waitUntilElementIsPresent(string $func, string $arg, int $timeout): WebDriverElement
    {
        return $this->webDriver->wait($timeout, 500)->until(
            WebDriverExpectedCondition::presenceOfElementLocated(WebDriverBy::$func($arg))
        );
    }

    /**
     * Wait for an element to be visible on the page or timeout
     *
     * @param string $func    Locate using - cssSelector, xpath, tagName, partialLinkText, linkText, name, id, className
     * @param string $arg     Selector
     * @param int    $timeout Timeout in seconds
     */
    public function waitUntilElementIsVisible(string $func, string $arg, int $timeout): WebDriverElement
    {
        return $this->webDriver->wait($timeout, 500)->until(
            WebDriverExpectedCondition::visibilityOfElementLocated(WebDriverBy::$func($arg))
        );
    }

    /**
     * Wait for an element to disappear
     *
     * @param string $func Locate using - byCss, byXPath, etc
     * @param string $arg  Selector
     */
    public function waitForElementNotPresent(string $func, string $arg): void
    {
        while (true) {
            if (! $this->isElementPresent($func, $arg)) {
                return;
            }

            usleep(5000);
        }
    }

    /**
     * Check if element is present or not
     *
     * @param string $func Locate using - cssSelector, xpath, tagName, partialLinkText, linkText, name, id, className
     * @param string $arg  Selector
     *
     * @return bool Whether or not the element is present
     */
    public function isElementPresent(string $func, string $arg): bool
    {
        try {
            $this->webDriver->findElement(WebDriverBy::$func($arg));
        } catch (NoSuchElementException $e) {
            // Element not present
            return false;
        } catch (InvalidArgumentException $e) {
            // Element not present
            return false;
        } catch (InvalidSelectorException $e) {
            // Element not present
            return false;
        }

        // Element Present
        return true;
    }

    /**
     * Get table cell data by the ID of the table
     *
     * @param string $tableID Table identifier
     * @param int    $row     Table row
     * @param int    $column  Table column
     *
     * @return string text Data from the particular table cell
     */
    public function getCellByTableId(string $tableID, int $row, int $column): string
    {
        $sel = sprintf(
            'table#%s tbody tr:nth-child(%d) td:nth-child(%d)',
            $tableID,
            $row,
            $column
        );
        $element = $this->byCssSelector(
            $sel
        );
        $text = $element->getText();

        return $text && is_string($text) ? trim($text) : '';
    }

    /**
     * Get table cell data by the class attribute of the table
     *
     * @param string $tableClass Class of the table
     * @param int    $row        Table row
     * @param int    $column     Table column
     *
     * @return string text Data from the particular table cell
     */
    public function getCellByTableClass(string $tableClass, int $row, int $column): string
    {
        $sel = sprintf(
            'table.%s tbody tr:nth-child(%d) td:nth-child(%d)',
            $tableClass,
            $row,
            $column
        );
        $element = $this->byCssSelector(
            $sel
        );
        $text = $element->getText();

        return $text && is_string($text) ? trim($text) : '';
    }

    /**
     * Wrapper around keys method to not use it on not supported
     * browsers.
     *
     * @param string $text Keys to send
     */
    public function keys(string $text): void
    {
        /**
         * Not supported in Safari Webdriver, see
         * https://github.com/seleniumhq/selenium-google-code-issue-archive/issues/4136
         */
        if ($this->isSafari()) {
            $this->markTestSkipped('Can not send keys to Safari browser.');
        } else {
            $this->webDriver->getKeyboard()->sendKeys($text);
        }
    }

    /**
     * Wrapper around moveto method to not use it on not supported
     * browsers.
     *
     * @param RemoteWebElement $element element
     */
    public function moveto(RemoteWebElement $element): void
    {
        /**
         * Not supported in Safari Webdriver, see
         * https://github.com/seleniumhq/selenium-google-code-issue-archive/issues/4136
         */
        if ($this->isSafari()) {
            $this->markTestSkipped('MoveTo not supported on Safari browser.');
        } else {
            $this->webDriver->getMouse()->mouseMove($element->getCoordinates());
        }
    }

    /**
     * Wrapper around alertText method to not use it on not supported
     * browsers.
     *
     * @return mixed
     */
    public function alertText()
    {
        /**
         * Not supported in Safari Webdriver, see
         * https://github.com/seleniumhq/selenium-google-code-issue-archive/issues/4136
         */
        if (! $this->isSafari()) {
            return $this->webDriver->switchTo()->alert()->getText();
        }

        $this->markTestSkipped('Alerts not supported on Safari browser.');
    }

    /**
     * Type text in textarea (CodeMirror enabled)
     *
     * @param string $text  Text to type
     * @param int    $index Index of CodeMirror instance to write to
     */
    public function typeInTextArea(string $text, int $index = 0): void
    {
        $this->waitForElement('cssSelector', 'div.cm-s-default');
        $this->webDriver->executeScript(
            "$('.cm-s-default')[" . $index . '].CodeMirror.setValue(' . json_encode($text) . ');'
        );
    }

    /**
     * Accept alert
     */
    public function acceptAlert(): void
    {
        $this->webDriver->switchTo()->alert()->accept();
    }

    /**
     * Clicks the "More" link in the menu
     */
    public function expandMore(): void
    {
        // "More" menu is not displayed on large screens
        if ($this->isElementPresent('cssSelector', 'li.nav-item.dropdown.d-none')) {
            return;
        }

        // Not found, searching for another alternative
        try {
            $ele = $this->waitForElement('cssSelector', 'li.dropdown > a');

            $ele->click();
            $this->waitForElement('cssSelector', 'li.dropdown.show > a');

            $this->waitUntilElementIsPresent(
                'cssSelector',
                'li.nav-item.dropdown.show > ul',
                5000
            );
        } catch (WebDriverException $e) {
            return;
        }
    }

    /**
     * Navigates browser to a table page.
     *
     * @param string $table                Name of table
     * @param bool   $gotoHomepageRequired Go to homepage required
     */
    public function navigateTable(string $table, bool $gotoHomepageRequired = false): void
    {
        $this->navigateDatabase($this->databaseName, $gotoHomepageRequired);

        // go to table page
        $this->waitForElement(
            'xpath',
            "//th//a[contains(., '" . $table . "')]"
        )->click();
        $this->waitAjax();

        $this->waitForElement(
            'xpath',
            "//a[@class='nav-link text-nowrap' and contains(., 'Browse')]"
        );
    }

    /**
     * Navigates browser to a database page.
     *
     * @param string $database             Name of database
     * @param bool   $gotoHomepageRequired Go to homepage required
     */
    public function navigateDatabase(string $database, bool $gotoHomepageRequired = false): void
    {
        if ($gotoHomepageRequired) {
            $this->gotoHomepage();
        }

        // Go to server databases
        $this->waitForElement('partialLinkText', 'Databases')->click();
        $this->waitAjax();

        // go to specific database page
        $this->waitForElement(
            'xpath',
            '//tr[(contains(@class, "db-row"))]//a[contains(., "' . $database . '")]'
        )->click();
        $this->waitAjax();

        // Wait for it to load
        $this->waitForElement(
            'xpath',
            "//a[@class='nav-link text-nowrap' and contains(., 'Structure')]"
        );
    }

    /**
     * Select an option that matches a value
     *
     * @param WebDriverElement $element The element
     * @param string           $value   The value of the option
     */
    public function selectByValue(WebDriverElement $element, string $value): void
    {
        $select = new WebDriverSelect($element);
        $select->selectByValue($value);
    }

    /**
     * Select an option that matches a text
     *
     * @param WebDriverElement $element The element
     * @param string           $text    The text
     */
    public function selectByLabel(WebDriverElement $element, string $text): void
    {
        $select = new WebDriverSelect($element);
        $select->selectByVisibleText($text);
    }

    /**
     * Scrolls to a coordinate such that the element with given id is visible
     *
     * @param string $element_id Id of the element
     * @param int    $y_offset   Offset from Y-coordinate of element
     */
    public function scrollIntoView(string $element_id, int $y_offset = 70): void
    {
        // 70pt offset by-default so that the topmenu does not cover the element
        $this->webDriver->executeScript(
            'var position = document.getElementById("'
            . $element_id . '").getBoundingClientRect();'
            . 'window.scrollBy(0, position.top-(' . $y_offset . '));'
        );
    }

    /**
     * Scrolls to a coordinate such that the element
     *
     * @param WebDriverElement $element The element
     * @param int              $xOffset The x offset to apply (defaults to 0)
     * @param int              $yOffset The y offset to apply (defaults to 0)
     */
    public function scrollToElement(WebDriverElement $element, int $xOffset = 0, int $yOffset = 0): void
    {
        $this->webDriver->executeScript(
            'window.scrollBy(' . ($element->getLocation()->getX() + $xOffset)
            . ', ' . ($element->getLocation()->getY() + $yOffset) . ');'
        );
    }

    /**
     * Scroll to the bottom of page
     */
    public function scrollToBottom(): void
    {
        $this->webDriver->executeScript(
            'window.scrollTo(0,document.body.scrollHeight);'
        );
    }

    /**
     * Reload the page
     */
    public function reloadPage(): void
    {
        $this->webDriver->executeScript(
            'window.location.reload();'
        );
    }

    /**
     * Wait for AJAX completion
     */
    public function waitAjax(): void
    {
        /* Wait while code is loading */
        $this->webDriver->executeAsyncScript(
            'var callback = arguments[arguments.length - 1];'
            . 'function startWaitingForAjax() {'
            . '    if (! AJAX.active) {'
            . '        callback();'
            . '    } else {'
            . '        setTimeout(startWaitingForAjax, 200);'
            . '    }'
            . '}'
            . 'startWaitingForAjax();'
        );
    }

    /**
     * Wait for AJAX message disappear
     */
    public function waitAjaxMessage(): void
    {
        /* Get current message count */
        $ajax_message_count = $this->webDriver->executeScript(
            'return ajaxMessageCount;'
        );
        /* Ensure the popup is gone */
        $this->waitForElementNotPresent(
            'id',
            'ajax_message_num_' . $ajax_message_count
        );
    }

    /**
     * Tear Down function for test cases
     */
    protected function tearDown(): void
    {
        if (static::$createDatabase) {
            $this->dbQuery('DROP DATABASE IF EXISTS `' . $this->databaseName . '`;');
        }

        if ($this->hadStorageDatabaseInstall) {
            $this->dbQuery('DROP DATABASE IF EXISTS `phpmyadmin`;');
        }

        if (! $this->hasFailed()) {
            $this->markTestAs('passed', '');
        }

        $this->sqlWindowHandle = null;
        $this->webDriver->quit();
    }

    /**
     * Mark test as failed or passed on BrowserStack
     *
     * @param string $status  passed or failed
     * @param string $message a message
     */
    private function markTestAs(string $status, string $message): void
    {
        // If this is being run on Browerstack,
        // mark the test on Browerstack as failure
        if (! $this->hasBrowserstackConfig()) {
            return;
        }

        $payload = json_encode(
            [
                'status' => $status,
                'reason' => $message,
            ]
        );
        /** @var resource $ch */
        $ch = curl_init();
        curl_setopt(
            $ch,
            CURLOPT_URL,
            self::SESSION_REST_URL . $this->sessionId . '.json'
        );
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
        curl_setopt(
            $ch,
            CURLOPT_USERPWD,
            $this->getBrowserStackCredentials()
        );

        $headers = [];
        $headers[] = 'Content-Type: application/json';
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

        curl_exec($ch);
        if ($ch !== false && curl_errno($ch)) {
            echo 'Error: ' . curl_error($ch) . PHP_EOL;
        }

        curl_close($ch);
    }

    private function getErrorVideoUrl(): void
    {
        if (! $this->hasBrowserstackConfig()) {
            return;
        }

        /** @var resource $ch */
        $ch = curl_init();
        curl_setopt(
            $ch,
            CURLOPT_URL,
            self::SESSION_REST_URL . $this->sessionId . '.json'
        );
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt(
            $ch,
            CURLOPT_USERPWD,
            $this->getBrowserStackCredentials()
        );
        $result = curl_exec($ch);
        if (is_bool($result)) {
            echo 'Error: ' . curl_error($ch) . PHP_EOL;

            return;
        }

        $proj = json_decode($result);
        if (isset($proj->automation_session)) {
            echo 'Test failed, get more information here: ' . $proj->automation_session->public_url . PHP_EOL;
        }

        if ($ch !== false && curl_errno($ch)) {
            echo 'Error: ' . curl_error($ch) . PHP_EOL;
        }

        curl_close($ch);
    }

    /**
     * Mark unsuccessful tests as 'Failures' on Browerstack
     *
     * @param Throwable $t Throwable
     */
    public function onNotSuccessfulTest(Throwable $t): void
    {
        $this->markTestAs('failed', $t->getMessage());
        $this->takeScrenshot('test_failed');
        // End testing session
        if ($this->webDriver !== null) {
            $this->webDriver->quit();
        }

        $this->sqlWindowHandle = null;

        $this->getErrorVideoUrl();

        // Call parent's onNotSuccessful to handle everything else
        parent::onNotSuccessfulTest($t);
    }
}