#!/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: MokoStandards.Scripts.Deploy
 * INGROUP: MokoStandards
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
 * PATH: /deploy/rollback-joomla.php
 * VERSION: 01.00.00
 * BRIEF: Rollback a Joomla deployment by restoring from a pre-deploy snapshot
 */

declare(strict_types=1);

class RollbackJoomla
{
	private bool $verbose = false;
	private bool $dryRun = false;
	private string $configPath = '';
	private string $snapshotDir = '';

	private const JOOMLA_DIRS = [
		'administrator/components',
		'administrator/language',
		'administrator/modules',
		'administrator/templates',
		'components',
		'language',
		'layouts',
		'libraries',
		'media',
		'modules',
		'plugins',
		'templates',
	];

	public function run(): int
	{
		$this->parseArgs();

		if ($this->configPath === '' || $this->snapshotDir === '') {
			$this->log('Usage: rollback-joomla.php --config <sftp-config.json> --snapshot-dir <path> [--dry-run] [--verbose]');
			return 1;
		}

		if (!is_dir($this->snapshotDir)) {
			$this->log("ERROR: Snapshot directory does not exist: {$this->snapshotDir}");
			return 1;
		}

		$config = $this->loadConfig($this->configPath);
		if ($config === null) {
			return 1;
		}

		$host = $config['host'] ?? '';
		$user = $config['user'] ?? '';
		$port = (int) ($config['port'] ?? 22);
		$remotePath = rtrim($config['remote_path'] ?? '', '/');
		$sshKey = $config['ssh_key_file'] ?? '';

		if ($host === '' || $user === '' || $remotePath === '') {
			$this->log('ERROR: Config must contain host, user, and remote_path.');
			return 1;
		}

		$this->log('Starting Joomla rollback from snapshot...');
		$this->log("Snapshot: {$this->snapshotDir}");
		$this->log("Target:   {$user}@{$host}:{$remotePath}");

		if ($this->dryRun) {
			$this->log('*** DRY RUN — no changes will be made ***');
		}

		$failed = 0;

		foreach (self::JOOMLA_DIRS as $dir) {
			$localDir = rtrim($this->snapshotDir, '/\\') . '/' . $dir . '/';

			if (!is_dir($localDir)) {
				if ($this->verbose) {
					$this->log("SKIP: {$dir} (not present in snapshot)");
				}
				continue;
			}

			$remoteTarget = "{$remotePath}/{$dir}/";
			$sshCmd = "ssh -p {$port}";
			if ($sshKey !== '') {
				$sshCmd .= " -i " . escapeshellarg($sshKey);
			}

			$rsyncArgs = [
				'rsync',
				'-rlptz',
				'--delete',
				'--exclude=configuration.php',
				'-e', $sshCmd,
			];

			if ($this->dryRun) {
				$rsyncArgs[] = '--dry-run';
			}

			if ($this->verbose) {
				$rsyncArgs[] = '-v';
			}

			$rsyncArgs[] = $localDir;
			$rsyncArgs[] = "{$user}@{$host}:{$remoteTarget}";

			$cmd = implode(' ', array_map('escapeshellarg', $rsyncArgs));
			// rsync -e needs unescaped, rebuild manually
			$cmd = $this->buildRsyncCommand($sshCmd, $localDir, "{$user}@{$host}:{$remoteTarget}");

			$this->log("Restoring: {$dir}");
			if ($this->verbose) {
				$this->log("CMD: {$cmd}");
			}

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

			if ($exitCode !== 0) {
				$this->log("ERROR: rsync failed for {$dir} (exit code {$exitCode})");
				foreach ($output as $line) {
					$this->log("  {$line}");
				}
				$failed++;
			} else {
				if ($this->verbose) {
					foreach ($output as $line) {
						$this->log("  {$line}");
					}
				}
			}
		}

		if ($failed > 0) {
			$this->log("Rollback completed with {$failed} error(s).");
			return 1;
		}

		$this->log('Rollback completed successfully.');
		return 0;
	}

	private function parseArgs(): void
	{
		$args = $_SERVER['argv'] ?? [];
		$count = count($args);

		for ($i = 1; $i < $count; $i++) {
			switch ($args[$i]) {
				case '--config':
					$this->configPath = $args[++$i] ?? '';
					break;
				case '--snapshot-dir':
					$this->snapshotDir = $args[++$i] ?? '';
					break;
				case '--dry-run':
					$this->dryRun = true;
					break;
				case '--verbose':
					$this->verbose = true;
					break;
			}
		}
	}

	private function loadConfig(string $path): ?array
	{
		if (!is_file($path)) {
			$this->log("ERROR: Config file not found: {$path}");
			return null;
		}

		$raw = file_get_contents($path);
		if ($raw === false) {
			$this->log("ERROR: Could not read config file: {$path}");
			return null;
		}

		// Strip // comments (sftp-config.json style)
		$cleaned = preg_replace('#^\s*//.*$#m', '', $raw);
		$config = json_decode($cleaned, true);

		if (!is_array($config)) {
			$this->log('ERROR: Invalid JSON in config file.');
			return null;
		}

		return $config;
	}

	private function buildRsyncCommand(string $sshCmd, string $source, string $dest): string
	{
		$parts = ['rsync', '-rlptz', '--delete', '--exclude=configuration.php'];

		if ($this->dryRun) {
			$parts[] = '--dry-run';
		}

		if ($this->verbose) {
			$parts[] = '-v';
		}

		$parts[] = '-e';
		$parts[] = escapeshellarg($sshCmd);
		$parts[] = escapeshellarg($source);
		$parts[] = escapeshellarg($dest);

		return implode(' ', $parts);
	}

	private function log(string $message): void
	{
		$timestamp = date('Y-m-d H:i:s');
		fwrite(STDERR, "[{$timestamp}] {$message}" . PHP_EOL);
	}
}

$app = new RollbackJoomla();
exit($app->run());