#!/usr/bin/env php
<?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
 *
 * FILE INFORMATION
 * DEFGROUP: MokoPlatform.Scripts.Deploy
 * INGROUP: MokoPlatform
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
 * PATH: /deploy/sync-joomla.php
 * VERSION: 09.22.00
 * BRIEF: Sync Joomla site directories between two servers via rsync over SSH
 */

declare(strict_types=1);

require_once __DIR__ . '/../lib/Enterprise/CliFramework.php';

use MokoEnterprise\CliFramework;

class SyncJoomlaCli extends CliFramework
{
    private string $sourceConfig = '';
    private string $destConfig = '';
    private bool $rsyncMode = false;
    private bool $fullMode = false;
    /** @var string[] */
    private array $excludes = [];
    private string $relayDir = '/tmp/sync/';

    /** @var string[] Standard Joomla directories to sync */
    private array $joomlaDirs = [
        'administrator/components',
        'administrator/language',
        'administrator/modules',
        'administrator/templates',
        'components',
        'language',
        'layouts',
        'libraries',
        'media',
        'modules',
        'plugins',
        'templates',
    ];

    protected function configure(): void
    {
        $this->setDescription('Sync Joomla site directories between two servers via rsync over SSH');
        $this->addArgument('--source', 'sftp-config.json for source server', '');
        $this->addArgument('--dest', 'sftp-config.json for dest server', '');
        $this->addArgument('--rsync', 'Sync standard Joomla directories', false);
        $this->addArgument('--full', 'Sync everything under the remote path', false);
        $this->addArgument('--exclude', 'Additional exclude pattern (repeatable)', '');
    }

    protected function run(): int
    {
        $this->sourceConfig = $this->getArgument('--source');
        $this->destConfig = $this->getArgument('--dest');
        $this->rsyncMode = $this->getArgument('--rsync');
        $this->fullMode = $this->getArgument('--full');

        // Handle repeatable --exclude from raw argv
        $rawArgs = $_SERVER['argv'] ?? [];
        for ($i = 1; $i < count($rawArgs); $i++) {
            if ($rawArgs[$i] === '--exclude' && isset($rawArgs[$i + 1])) {
                $this->excludes[] = $rawArgs[$i + 1];
                $i++;
            }
        }

        if (!$this->validate()) {
            return 1;
        }

        $source = $this->loadConfig($this->sourceConfig);
        $dest = $this->loadConfig($this->destConfig);

        if ($source === null || $dest === null) {
            return 1;
        }

        echo "Source: {$source['user']}@{$source['host']}:{$source['remote_path']}\n";
        echo "Dest:   {$dest['user']}@{$dest['host']}:{$dest['remote_path']}\n";

        if ($this->dryRun) {
            echo "[DRY-RUN] No files will be transferred.\n";
        }

        $this->prepareRelayDir();

        $dirs = $this->resolveDirs();
        $totalFiles = 0;
        $syncedDirs = 0;

        foreach ($dirs as $dir) {
            echo "--- Syncing: {$dir}\n";

            $pulled = $this->pullFromSource($source, $dir);
            if ($pulled === false) {
                echo "  WARNING: pull failed for {$dir}, skipping.\n";
                continue;
            }

            $pushed = $this->pushToDest($dest, $dir);
            if ($pushed === false) {
                echo "  WARNING: push failed for {$dir}, skipping.\n";
                continue;
            }

            $totalFiles += $pulled + $pushed;
            $syncedDirs++;
        }

        $this->cleanup();
        echo "\n";
        echo "=== Sync Summary ===\n";
        echo "Directories synced: {$syncedDirs}/" . count($dirs) . "\n";
        echo "Rsync operations:   " . ($syncedDirs * 2) . " (pull + push)\n";

        if ($this->dryRun) {
            echo "Mode: dry-run (no files were transferred)\n";
        }

        return 0;
    }

    private function validate(): bool
    {
        if ($this->sourceConfig === '' || $this->destConfig === '') {
            $this->log('ERROR', '--source and --dest are required.');
            return false;
        }

        if (!$this->rsyncMode && !$this->fullMode) {
            $this->log('ERROR', 'Either --rsync or --full must be specified.');
            return false;
        }

        if ($this->rsyncMode && $this->fullMode) {
            $this->log('ERROR', '--rsync and --full are mutually exclusive.');
            return false;
        }

        if (!file_exists($this->sourceConfig)) {
            $this->log('ERROR', "Source config not found: {$this->sourceConfig}");
            return false;
        }

        if (!file_exists($this->destConfig)) {
            $this->log('ERROR', "Dest config not found: {$this->destConfig}");
            return false;
        }

        return true;
    }

    private function loadConfig(string $path): ?array
    {
        $json = file_get_contents($path);
        if ($json === false) {
            $this->log('ERROR', "Cannot read config: {$path}");
            return null;
        }

        // Strip // comments (Sublime Text SFTP format)
        $json = preg_replace('#^\s*//.*$#m', '', $json);
        $json = preg_replace('#,\s*([\]}])#', '$1', $json);

        $config = json_decode($json, true);
        if (!is_array($config)) {
            $this->log('ERROR', "Invalid JSON in config: {$path}");
            return null;
        }

        $required = ['host', 'user', 'remote_path', 'ssh_key_file'];
        foreach ($required as $key) {
            if (empty($config[$key])) {
                $this->log('ERROR', "Missing '{$key}' in config: {$path}");
                return null;
            }
        }

        if (!isset($config['port'])) {
            $config['port'] = 22;
        }

        return $config;
    }

    /** @return string[] */
    private function resolveDirs(): array
    {
        if ($this->fullMode) {
            return ['.'];
        }

        return $this->joomlaDirs;
    }

    private function prepareRelayDir(): void
    {
        if (is_dir($this->relayDir)) {
            shell_exec("rm -rf " . escapeshellarg($this->relayDir));
        }

        mkdir($this->relayDir, 0755, true);
        echo "Relay directory: {$this->relayDir}\n";
    }

    private function buildExcludes(): string
    {
        $excludes = ['configuration.php'];
        $excludes = array_merge($excludes, $this->excludes);

        $flags = '';
        foreach ($excludes as $pattern) {
            $flags .= ' --exclude=' . escapeshellarg($pattern);
        }

        return $flags;
    }

    private function buildSshCmd(array $config): string
    {
        $keyPath = escapeshellarg($config['ssh_key_file']);
        $port = (int) $config['port'];

        return "ssh -i {$keyPath} -p {$port} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null";
    }

    /** @return int|false */
    private function pullFromSource(array $config, string $dir): int|false
    {
        $remotePath = rtrim($config['remote_path'], '/') . '/' . ltrim($dir, './');
        $localPath = $this->relayDir . ltrim($dir, './');

        if (!is_dir($localPath)) {
            mkdir($localPath, 0755, true);
        }

        $sshCmd = $this->buildSshCmd($config);
        $excludes = $this->buildExcludes();
        $dryFlag = $this->dryRun ? ' --dry-run' : '';
        $verboseFlag = $this->verbose ? ' -v' : '';

        $remote = escapeshellarg("{$config['user']}@{$config['host']}:{$remotePath}/");
        $local = escapeshellarg("{$localPath}/");

        $cmd = "rsync -az --delete"
            . $dryFlag
            . $verboseFlag
            . $excludes
            . " -e " . escapeshellarg($sshCmd)
            . " {$remote} {$local}"
            . " 2>&1";

        if ($this->verbose) {
            echo "  PULL: {$cmd}\n";
        }

        $output = [];
        $exitCode = 0;
        exec($cmd, $output, $exitCode);

        if ($exitCode !== 0) {
            echo "  ERROR (exit {$exitCode}): " . implode("\n", $output) . "\n";
            return false;
        }

        $fileCount = count($output);
        if ($this->verbose) {
            echo "  Pulled {$fileCount} line(s) of output.\n";
        }

        return $fileCount;
    }

    /** @return int|false */
    private function pushToDest(array $config, string $dir): int|false
    {
        $remotePath = rtrim($config['remote_path'], '/') . '/' . ltrim($dir, './');
        $localPath = $this->relayDir . ltrim($dir, './');

        $sshCmd = $this->buildSshCmd($config);
        $excludes = $this->buildExcludes();
        $dryFlag = $this->dryRun ? ' --dry-run' : '';
        $verboseFlag = $this->verbose ? ' -v' : '';

        $local = escapeshellarg("{$localPath}/");
        $remote = escapeshellarg("{$config['user']}@{$config['host']}:{$remotePath}/");

        $cmd = "rsync -az --delete"
            . $dryFlag
            . $verboseFlag
            . $excludes
            . " -e " . escapeshellarg($sshCmd)
            . " {$local} {$remote}"
            . " 2>&1";

        if ($this->verbose) {
            echo "  PUSH: {$cmd}\n";
        }

        $output = [];
        $exitCode = 0;
        exec($cmd, $output, $exitCode);

        if ($exitCode !== 0) {
            echo "  ERROR (exit {$exitCode}): " . implode("\n", $output) . "\n";
            return false;
        }

        $fileCount = count($output);
        if ($this->verbose) {
            echo "  Pushed {$fileCount} line(s) of output.\n";
        }

        return $fileCount;
    }

    private function cleanup(): void
    {
        if (is_dir($this->relayDir)) {
            shell_exec("rm -rf " . escapeshellarg($this->relayDir));
            if ($this->verbose) {
                echo "Cleaned up relay directory.\n";
            }
        }
    }
}

$app = new SyncJoomlaCli();
exit($app->execute());