<?php

/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
 * @license    GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\CMS;

use Joomla\CMS\Cache\CacheController;
use Joomla\CMS\Cache\CacheControllerFactoryInterface;
use Joomla\CMS\Cache\Controller\CallbackController;
use Joomla\CMS\Date\Date;

// phpcs:disable PSR1.Files.SideEffects
\defined('_JEXEC') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * Version information class for the Joomla CMS.
 *
 * @since  1.0
 */
final class Version
{
    /**
     * Product name.
     *
     * @var    string
     * @since  3.5
     */
    public const PRODUCT = 'Joomla!';

    /**
     * Major release version.
     *
     * @var    integer
     * @since  3.8.0
     */
    public const MAJOR_VERSION = 6;

    /**
     * Minor release version.
     *
     * @var    integer
     * @since  3.8.0
     */
    public const MINOR_VERSION = 2;

    /**
     * Patch release version.
     *
     * @var    integer
     * @since  3.8.0
     */
    public const PATCH_VERSION = 0;

    /**
     * Extra release version info.
     *
     * This constant when not empty adds an additional identifier to the version string to reflect the development state.
     * For example, for 3.8.0 when this is set to 'dev' the version string will be `3.8.0-dev`.
     *
     * @var    string
     * @since  3.8.0
     */
    public const EXTRA_VERSION = 'alpha1-dev+pr.47566';

    /**
     * Development status.
     *
     * @var    string
     * @since  3.5
     */
    public const DEV_STATUS = 'Development';

    /**
     * Code name.
     *
     * @var    string
     * @since  3.5
     */
    public const CODENAME = 'TBD';

    /**
     * Release date.
     *
     * @var    string
     * @since  3.5
     */
    public const RELDATE = '26-May-2026';

    /**
     * Release time.
     *
     * @var    string
     * @since  3.5
     */
    public const RELTIME = '18:00';

    /**
     * Release timezone.
     *
     * @var    string
     * @since  3.5
     */
    public const RELTZ = 'UTC';

    /**
     * Copyright Notice.
     *
     * @var    string
     * @since  3.5
     */
    public const COPYRIGHT = '(C) 2005 Open Source Matters, Inc. <https://www.joomla.org>';

    /**
     * Link text.
     *
     * @var    string
     * @since  3.5
     */
    public const URL = '<a href="https://www.joomla.org">Joomla!</a> is Free Software released under the GNU General Public License.';

    /**
     * Media version string
     *
     * @var string
     * @since   4.2.0
     */
    private static $mediaVersion = null;

    /**
     * Check if we are in development mode
     *
     * @return  boolean
     *
     * @since   3.4.3
     */
    public function isInDevelopmentState(): bool
    {
        return strtolower(self::DEV_STATUS) !== 'stable';
    }

    /**
     * Compares two a "PHP standardized" version number against the current Joomla version.
     *
     * @param   string  $minimum  The minimum version of the Joomla which is compatible.
     *
     * @return  boolean True if the version is compatible.
     *
     * @link    https://www.php.net/version_compare
     * @since   1.0
     */
    public function isCompatible(string $minimum): bool
    {
        return version_compare(JVERSION, $minimum, 'ge');
    }

    /**
     * Method to get the help file version.
     *
     * @return  string  Version suffix for help files.
     *
     * @since   1.0
     */
    public function getHelpVersion(): string
    {
        return '.' . self::MAJOR_VERSION . self::MINOR_VERSION;
    }

    /**
     * Gets a "PHP standardized" version string for the current Joomla.
     *
     * @return  string  Version string.
     *
     * @since   1.5
     */
    public function getShortVersion(): string
    {
        $version = self::MAJOR_VERSION . '.' . self::MINOR_VERSION . '.' . self::PATCH_VERSION;

        if (!empty(self::EXTRA_VERSION)) {
            $version .= '-' . self::EXTRA_VERSION;
        }

        return $version;
    }

    /**
     * Gets a version string for the current Joomla with all release information.
     *
     * @return  string  Complete version string.
     *
     * @since   1.5
     */
    public function getLongVersion(): string
    {
        return self::PRODUCT . ' ' . $this->getShortVersion() . ' '
            . self::DEV_STATUS . ' [ ' . self::CODENAME . ' ] ' . self::RELDATE . ' '
            . self::RELTIME . ' ' . self::RELTZ;
    }

    /**
     * Returns the user agent.
     *
     * @param   string  $suffix      String to append to resulting user agent.
     * @param   bool    $mask        Mask as Mozilla/5.0 or not.
     * @param   bool    $addVersion  Add version afterwards to component.
     *
     * @return  string  User Agent.
     *
     * @since   1.0
     */
    public function getUserAgent(string $suffix = '', bool $mask = false, bool $addVersion = true): string
    {
        if ($suffix === '') {
            $suffix = 'Framework';
        }

        if ($addVersion) {
            $suffix .= '/' . self::MAJOR_VERSION . '.' . self::MINOR_VERSION;
        }

        // If masked pretend to look like Mozilla 5.0 but still identify ourselves.
        return ($mask ? 'Mozilla/5.0 ' : '') . self::PRODUCT . '/' . $this->getShortVersion() . ($suffix ? ' ' . $suffix : '');
    }

    /**
     * Generate a media version string for assets
     * Public to allow third party developers to use it
     *
     * @return  string
     *
     * @since   3.2
     */
    public function generateMediaVersion(): string
    {
        return substr(md5($this->getLongVersion() . Factory::getApplication()->get('secret') . (new Date())->toSql()), 0, 6);
    }

    /**
     * Gets a media version which is used to append to Joomla core media files.
     *
     * This media version is used to append to Joomla core media in order to trick browsers into
     * reloading the CSS and JavaScript, because they think the files are renewed.
     * The media version is renewed after Joomla core update, install, discover_install and uninstallation.
     *
     * @return  string  The media version.
     *
     * @since   3.2
     */
    public function getMediaVersion(): string
    {
        // Load the media version and cache it for future use
        if (self::$mediaVersion === null) {
            self::$mediaVersion = $this->getMediaVersionCache()
                ->get([$this, 'generateMediaVersion'], [], md5('_media_version' . $this->getLongVersion()));
        }

        return self::$mediaVersion;
    }

    /**
     * Function to refresh the media version
     *
     * @return  Version  Instance of $this to allow chaining.
     *
     * @since   3.2
     */
    public function refreshMediaVersion(): Version
    {
        return $this->setMediaVersion($this->generateMediaVersion());
    }

    /**
     * Sets the media version which is used to append to Joomla core media files.
     *
     * @param   string  $mediaVersion  The media version.
     *
     * @return  Version  Instance of $this to allow chaining.
     *
     * @since   3.2
     */
    public function setMediaVersion(string $mediaVersion): Version
    {
        // Do not allow empty media versions
        if (!empty($mediaVersion)) {
            self::$mediaVersion = $mediaVersion;

            $this->getMediaVersionCache()
                ->store(['result' => $mediaVersion, 'output' => ''], md5('_media_version' . $this->getLongVersion()));
        }

        return $this;
    }

    /**
     * Get cache instance for MediaVersion caching.
     *
     * @return CacheController
     *
     * @since   4.2.0
     */
    private function getMediaVersionCache(): CacheController
    {
        /** @var CallbackController $cache */
        $cache = Factory::getContainer()->get(CacheControllerFactoryInterface::class)
            ->createCacheController('callback', ['defaultgroup' => '_media_version', 'caching' => true]);

        /**
         * Media version cache never expire (this is the highest integer value for 32 bit systems once multiplied by 60
         * in the cache controller.
         */
        $cache->setLifeTime(5259600);

        // Disable cache when Debug is enabled
        if (JDEBUG) {
            $cache->setCaching(false);
        }

        return $cache;
    }
}
