<?php
/**
 * Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
 *
 * This file is part of a Moko Consulting project.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

/**
 * Bridge migration helper — MokoCassiopeia → MokoOnyx
 *
 * Renames template files/folders and updates the database to migrate
 * from MokoCassiopeia to MokoOnyx. No external downloads required.
 */

defined('_JEXEC') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Log\Log;

class MokoBridgeMigration
{
    private const OLD_NAME = 'mokocassiopeia';
    private const NEW_NAME = 'mokoonyx';

    private const OLD_DISPLAY = 'MokoCassiopeia';
    private const NEW_DISPLAY = 'MokoOnyx';

    /**
     * Run the full migration.
     */
    public static function run(): bool
    {
        $app = Factory::getApplication();

        // Already migrated?
        if (is_dir(JPATH_ROOT . '/templates/' . self::NEW_NAME)) {
            self::log('MokoOnyx template dir already exists — updating database only.');
            self::updateDatabase();
            self::notifyUser($app);
            return true;
        }

        // 1. Rename template directory
        $renamed = self::renameTemplateDir();
        if (!$renamed) {
            $app->enqueueMessage(
                'MokoOnyx migration: could not rename template directory. '
                . 'Please rename templates/mokocassiopeia to templates/mokoonyx manually.',
                'warning'
            );
            return false;
        }

        // 2. Rename media directory
        self::renameMediaDir();

        // 3. Update database (extensions, template_styles, menu assignments)
        self::updateDatabase();

        // 4. Notify admin
        self::notifyUser($app);

        self::log('Bridge migration completed successfully.');
        return true;
    }

    /**
     * Rename templates/mokocassiopeia → templates/mokoonyx
     */
    private static function renameTemplateDir(): bool
    {
        $oldDir = JPATH_ROOT . '/templates/' . self::OLD_NAME;
        $newDir = JPATH_ROOT . '/templates/' . self::NEW_NAME;

        if (!is_dir($oldDir)) {
            self::log('Bridge: old template dir not found: ' . $oldDir, 'warning');
            return false;
        }

        if (is_dir($newDir)) {
            self::log('Bridge: new template dir already exists — skipping rename');
            return true;
        }

        $result = @rename($oldDir, $newDir);
        if ($result) {
            self::log('Bridge: renamed template dir to ' . self::NEW_NAME);
        } else {
            self::log('Bridge: failed to rename template dir', 'error');
        }

        return $result;
    }

    /**
     * Rename media/templates/site/mokocassiopeia → mokoonyx
     */
    private static function renameMediaDir(): void
    {
        $oldMedia = JPATH_ROOT . '/media/templates/site/' . self::OLD_NAME;
        $newMedia = JPATH_ROOT . '/media/templates/site/' . self::NEW_NAME;

        if (!is_dir($oldMedia)) {
            self::log('Bridge: old media dir not found — skipping');
            return;
        }

        if (is_dir($newMedia)) {
            self::log('Bridge: new media dir already exists — skipping rename');
            return;
        }

        if (@rename($oldMedia, $newMedia)) {
            self::log('Bridge: renamed media dir to ' . self::NEW_NAME);
        } else {
            self::log('Bridge: failed to rename media dir', 'warning');
        }
    }

    /**
     * Update all database references from mokocassiopeia → mokoonyx.
     */
    private static function updateDatabase(): void
    {
        $db = Factory::getDbo();

        // 1. Update #__extensions — change element and name
        $query = $db->getQuery(true)
            ->update('#__extensions')
            ->set($db->quoteName('element') . ' = ' . $db->quote(self::NEW_NAME))
            ->set($db->quoteName('name') . ' = ' . $db->quote(self::NEW_NAME))
            ->where($db->quoteName('element') . ' = ' . $db->quote(self::OLD_NAME))
            ->where($db->quoteName('type') . ' = ' . $db->quote('template'));
        try {
            $db->setQuery($query)->execute();
            $affected = $db->getAffectedRows();
            if ($affected > 0) {
                self::log("Bridge: updated {$affected} row(s) in #__extensions");
            }
        } catch (\Throwable $e) {
            self::log('Bridge: #__extensions update failed: ' . $e->getMessage(), 'error');
        }

        // 2. Update #__template_styles — rename template and title
        $query = $db->getQuery(true)
            ->select('*')
            ->from('#__template_styles')
            ->where($db->quoteName('template') . ' = ' . $db->quote(self::OLD_NAME));
        $styles = $db->setQuery($query)->loadObjectList();

        foreach ($styles as $style) {
            $newTitle = str_replace(self::OLD_DISPLAY, self::NEW_DISPLAY, $style->title);
            // Also catch lowercase variant
            $newTitle = str_replace(self::OLD_NAME, self::NEW_NAME, $newTitle);

            $newParams = $style->params;
            if (is_string($newParams)) {
                $newParams = str_replace(self::OLD_NAME, self::NEW_NAME, $newParams);
            }

            $update = $db->getQuery(true)
                ->update('#__template_styles')
                ->set($db->quoteName('template') . ' = ' . $db->quote(self::NEW_NAME))
                ->set($db->quoteName('title') . ' = ' . $db->quote($newTitle))
                ->set($db->quoteName('params') . ' = ' . $db->quote($newParams))
                ->where('id = ' . (int) $style->id);

            try {
                $db->setQuery($update)->execute();
            } catch (\Throwable $e) {
                self::log('Bridge: style update failed for id=' . $style->id . ': ' . $e->getMessage(), 'error');
            }
        }

        if (!empty($styles)) {
            self::log('Bridge: updated ' . count($styles) . ' template style(s) in #__template_styles');
        }

        // 3. Update #__menu — fix template_style_id link field references
        // Menu items store the template name in the link for template-specific assignments
        try {
            $query = $db->getQuery(true)
                ->update('#__menu')
                ->set($db->quoteName('link') . ' = REPLACE(' . $db->quoteName('link') . ', '
                    . $db->quote(self::OLD_NAME) . ', ' . $db->quote(self::NEW_NAME) . ')')
                ->where($db->quoteName('link') . ' LIKE ' . $db->quote('%' . self::OLD_NAME . '%'));
            $db->setQuery($query)->execute();
            $affected = $db->getAffectedRows();
            if ($affected > 0) {
                self::log("Bridge: updated {$affected} menu link(s)");
            }
        } catch (\Throwable $e) {
            self::log('Bridge: #__menu update failed: ' . $e->getMessage(), 'warning');
        }

        // 4. Update #__update_sites — point to MokoOnyx updates.xml
        try {
            $newLocation = 'https://git.mokoconsulting.tech/MokoConsulting/MokoOnyx/raw/branch/main/updates.xml';
            $query = $db->getQuery(true)
                ->update('#__update_sites')
                ->set($db->quoteName('location') . ' = ' . $db->quote($newLocation))
                ->set($db->quoteName('name') . ' = ' . $db->quote(self::NEW_DISPLAY))
                ->where($db->quoteName('location') . ' LIKE ' . $db->quote('%MokoCassiopeia%'));
            $db->setQuery($query)->execute();
            $affected = $db->getAffectedRows();
            if ($affected > 0) {
                self::log("Bridge: updated {$affected} update site(s) to MokoOnyx");
            }
        } catch (\Throwable $e) {
            self::log('Bridge: #__update_sites update failed: ' . $e->getMessage(), 'warning');
        }

        // 5. Update #__updates — clear cached updates for old extension
        try {
            $query = $db->getQuery(true)
                ->delete('#__updates')
                ->where($db->quoteName('element') . ' = ' . $db->quote(self::OLD_NAME));
            $db->setQuery($query)->execute();
            $affected = $db->getAffectedRows();
            if ($affected > 0) {
                self::log("Bridge: cleared {$affected} cached update(s) for old extension");
            }
        } catch (\Throwable $e) {
            self::log('Bridge: #__updates cleanup failed: ' . $e->getMessage(), 'warning');
        }
    }

    private static function notifyUser($app): void
    {
        $app->enqueueMessage(
            '<strong>MokoCassiopeia has been renamed to MokoOnyx.</strong><br>'
            . 'Your template files, settings, and menu assignments have been migrated automatically. '
            . 'MokoOnyx is now your active site template.',
            'success'
        );
    }

    private static function log(string $message, string $priority = 'info'): void
    {
        $priorities = [
            'info'    => Log::INFO,
            'warning' => Log::WARNING,
            'error'   => Log::ERROR,
        ];

        Log::addLogger(
            ['text_file' => 'mokocassiopeia_bridge.log.php'],
            Log::ALL,
            ['mokocassiopeia_bridge']
        );

        Log::add($message, $priorities[$priority] ?? Log::INFO, 'mokocassiopeia_bridge');
    }
}