<?php

/**
 * @package     MokoSuiteOpenGraph
 * @subpackage  com_mokoog
 * @author      Moko Consulting <hello@mokoconsulting.tech>
 * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
 * @license     GNU General Public License version 3 or later; see LICENSE
 */

defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Installer\InstallerAdapter;
use Joomla\Database\DatabaseInterface;

class Com_MokoOGInstallerScript
{
    /**
     * Called after install.
     *
     * @param   InstallerAdapter  $parent  Installer adapter
     *
     * @return  void
     */
    public function install(InstallerAdapter $parent): void
    {
        // Be honest about success: don't claim a clean install if the component's
        // own tables never landed. Fails open (see missingTables) so a query/IO
        // glitch never fakes a failure.
        $missing = $this->missingTables();

        if (!empty($missing))
        {
            echo '<p>MokoSuiteOpenGraph component did not install correctly. '
                . 'Missing database table(s): '
                . htmlspecialchars(implode(', ', $missing), ENT_QUOTES) . '.</p>';

            return;
        }

        echo '<p>MokoSuiteOpenGraph component installed successfully.</p>';
    }

    /**
     * Called after update.
     *
     * @param   InstallerAdapter  $parent  Installer adapter
     *
     * @return  void
     */
    public function update(InstallerAdapter $parent): void
    {
        $missing = $this->missingTables();

        if (!empty($missing))
        {
            echo '<p>MokoSuiteOpenGraph component did not update correctly. '
                . 'Missing database table(s): '
                . htmlspecialchars(implode(', ', $missing), ENT_QUOTES) . '.</p>';

            return;
        }

        echo '<p>MokoSuiteOpenGraph component updated successfully.</p>';
    }

    /**
     * Verify the component's declared tables actually exist. Reads the shipped
     * install SQL, extracts every CREATE TABLE #__name, resolves the live prefix,
     * and checks each against the database's table list (case-insensitive).
     *
     * FAILS OPEN: any error (unreadable SQL, query failure) returns [] so a
     * transient glitch never turns a good install into a false failure.
     *
     * @return  string[]  Prefixed names of any missing tables.
     */
    private function missingTables(): array
    {
        try
        {
            $sqlFile = JPATH_ADMINISTRATOR . '/components/com_mokoog/sql/install.mysql.sql';

            if (!is_file($sqlFile))
            {
                return [];
            }

            $sql = (string) file_get_contents($sqlFile);

            if ($sql === '' || !preg_match_all('/CREATE\s+TABLE\s+(?:IF\s+NOT\s+EXISTS\s+)?[`"\']?(#__[A-Za-z0-9_]+)/i', $sql, $m))
            {
                return [];
            }

            $db       = Factory::getContainer()->get(DatabaseInterface::class);
            $prefix   = $db->getPrefix();
            $existing = array_map('strtolower', (array) $db->getTableList());
            $missing  = [];

            foreach (array_unique($m[1]) as $table)
            {
                $real = str_replace('#__', $prefix, $table);

                if (!in_array(strtolower($real), $existing, true))
                {
                    $missing[] = $real;
                }
            }

            return $missing;
        }
        catch (\Throwable $e)
        {
            // Fail open — never fake a failure on a glitch.
            return [];
        }
    }
}