<?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;

class Com_MokoOGInstallerScript
{
    /**
     * Called after install.
     *
     * @param   InstallerAdapter  $parent  Installer adapter
     *
     * @return  void
     */
    public function install(InstallerAdapter $parent): void
    {
        // Be smart: verify EVERY table the component's own install SQL declares is
        // actually present. If any are missing the install did not complete — say
        // so instead of showing "installed successfully".
        $missing = $this->missingTables();

        if ($missing !== []) {
            $detail = count($missing) > 6
                ? count($missing) . ' expected database tables are missing'
                : 'missing tables: ' . htmlspecialchars(implode(', ', $missing), ENT_QUOTES, 'UTF-8');

            Factory::getApplication()->enqueueMessage(
                '<strong>MokoSuiteOpenGraph did not install correctly.</strong> ' . $detail
                . ' — review the errors above, then reinstall.',
                'error'
            );

            return;
        }

        Factory::getApplication()->enqueueMessage('<h4>MokoSuiteOpenGraph installed successfully!</h4>', 'info');
    }

    /**
     * Called after update.
     *
     * @param   InstallerAdapter  $parent  Installer adapter
     *
     * @return  void
     */
    public function update(InstallerAdapter $parent): void
    {
        // Same smart check on update: only report success if the schema is intact.
        $missing = $this->missingTables();

        if ($missing !== []) {
            $detail = count($missing) > 6
                ? count($missing) . ' expected database tables are missing'
                : 'missing tables: ' . htmlspecialchars(implode(', ', $missing), ENT_QUOTES, 'UTF-8');

            Factory::getApplication()->enqueueMessage(
                '<strong>MokoSuiteOpenGraph did not update correctly.</strong> ' . $detail
                . ' — review the errors above.',
                'error'
            );

            return;
        }

        Factory::getApplication()->enqueueMessage('MokoSuiteOpenGraph updated successfully.', 'info');
    }

    /**
     * Smart schema check: parse the component's own installed install SQL for every
     * CREATE TABLE, then return the ones missing from the database. An empty array
     * means the full schema installed. Fails open (returns []) if the SQL can't be
     * read, so a good install is never flagged as failed.
     *
     * @return  string[]  Names (without the #__ prefix) of missing tables.
     */
    private function missingTables(): array
    {
        try {
            $sqlFile = JPATH_ADMINISTRATOR . '/components/com_mokoog/sql/install.mysql.sql';

            if (!is_file($sqlFile)) {
                return [];
            }

            $sql = file_get_contents($sqlFile);

            if ($sql === false
                || !preg_match_all('/CREATE\s+TABLE\s+(?:IF\s+NOT\s+EXISTS\s+)?[`"\']?(#__[A-Za-z0-9_]+)/i', $sql, $m)) {
                return [];
            }

            $db      = Factory::getDbo();
            $prefix  = strtolower($db->getPrefix());
            $have    = array_map('strtolower', $db->getTableList());
            $missing = [];

            foreach (array_unique($m[1]) as $decl) {
                $bare = substr($decl, 3);                    // strip "#__"
                if (!in_array($prefix . strtolower($bare), $have, true)) {
                    $missing[] = $bare;
                }
            }

            return $missing;
        } catch (\Throwable $e) {
            return [];
        }
    }
}