<?php

/**
 * @package     Joomla.Administrator
 * @subpackage  com_installer
 *
 * @copyright   (C) 2008 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

namespace Joomla\Component\Installer\Administrator\Model;

use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\MVC\Model\ListModel;

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

/**
 * Installer Warnings Model
 *
 * @since  1.6
 */
class WarningsModel extends ListModel
{
    /**
     * Extension Type
     * @var string
     */
    public $type = 'warnings';

    /**
     * Return the byte value of a particular string.
     *
     * @param   string  $val  String optionally with G, M or K suffix
     *
     * @return  integer   size in bytes
     *
     * @since 1.6
     */
    public function return_bytes($val)
    {
        if (empty($val)) {
            return 0;
        }

        $val = trim($val);

        preg_match('#([0-9]+)[\s]*([a-z]+)#i', $val, $matches);

        $last = '';

        if (isset($matches[2])) {
            $last = $matches[2];
        }

        if (isset($matches[1])) {
            $val = (int) $matches[1];
        }

        switch (strtolower($last)) {
            case 'g':
            case 'gb':
                $val *= (1024 * 1024 * 1024);
                break;
            case 'm':
            case 'mb':
                $val *= (1024 * 1024);
                break;
            case 'k':
            case 'kb':
                $val *= 1024;
                break;
        }

        return (int) $val;
    }

    /**
     * Load the data.
     *
     * @return  array  Messages
     *
     * @since   1.6
     */
    public function getItems()
    {
        static $messages;

        if ($messages) {
            return $messages;
        }

        $messages = [];

        // 16MB
        $minLimit = 16 * 1024 * 1024;

        $file_uploads = \ini_get('file_uploads');

        if (!$file_uploads) {
            $messages[] = [
                'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_FILEUPLOADSDISABLED'),
                'description' => Text::_('COM_INSTALLER_MSG_WARNINGS_FILEUPLOADISDISABLEDDESC'),
            ];
        }

        $upload_dir = \ini_get('upload_tmp_dir');

        if (!$upload_dir) {
            $messages[] = [
                'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_PHPUPLOADNOTSET'),
                'description' => Text::_('COM_INSTALLER_MSG_WARNINGS_PHPUPLOADNOTSETDESC'),
            ];
        } elseif (!is_writable($upload_dir)) {
            $messages[] = [
                'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_PHPUPLOADNOTWRITEABLE'),
                'description' => Text::sprintf('COM_INSTALLER_MSG_WARNINGS_PHPUPLOADNOTWRITEABLEDESC', $upload_dir),
            ];
        }

        $tmp_path = Factory::getApplication()->get('tmp_path');

        if (!$tmp_path) {
            $messages[] = [
                'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_JOOMLATMPNOTSET'),
                'description' => Text::_('COM_INSTALLER_MSG_WARNINGS_JOOMLATMPNOTSETDESC'),
            ];
        } elseif (!is_writable($tmp_path)) {
            $messages[] = [
                'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_JOOMLATMPNOTWRITEABLE'),
                'description' => Text::sprintf('COM_INSTALLER_MSG_WARNINGS_JOOMLATMPNOTWRITEABLEDESC', $tmp_path),
            ];
        }

        $memory_limit = $this->return_bytes(\ini_get('memory_limit'));

        if ($memory_limit > -1) {
            if ($memory_limit < $minLimit) {
                // 16MB
                $messages[] = [
                    'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_LOWMEMORYWARN'),
                    'description' => Text::_('COM_INSTALLER_MSG_WARNINGS_LOWMEMORYDESC'),
                ];
            } elseif ($memory_limit < ($minLimit * 1.5)) {
                // 24MB
                $messages[] = [
                    'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_MEDMEMORYWARN'),
                    'description' => Text::_('COM_INSTALLER_MSG_WARNINGS_MEDMEMORYDESC'),
                ];
            }
        }

        $post_max_size       = $this->return_bytes(\ini_get('post_max_size'));
        $upload_max_filesize = $this->return_bytes(\ini_get('upload_max_filesize'));

        if ($post_max_size > 0 && $post_max_size < $upload_max_filesize) {
            $messages[] = [
                'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_UPLOADBIGGERTHANPOST'),
                'description' => Text::_('COM_INSTALLER_MSG_WARNINGS_UPLOADBIGGERTHANPOSTDESC'),
            ];
        }

        if ($post_max_size > 0 && $post_max_size < $minLimit) {
            $messages[] = [
                'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_SMALLPOSTSIZE'),
                'description' => Text::_('COM_INSTALLER_MSG_WARNINGS_SMALLPOSTSIZEDESC'),
            ];
        }

        if ($upload_max_filesize > 0 && $upload_max_filesize < $minLimit) {
            $messages[] = [
                'message'     => Text::_('COM_INSTALLER_MSG_WARNINGS_SMALLUPLOADSIZE'),
                'description' => Text::_('COM_INSTALLER_MSG_WARNINGS_SMALLUPLOADSIZEDESC'),
            ];
        }

        return $messages;
    }
}