#!/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.Maintenance
 * INGROUP: MokoPlatform
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
 * PATH: /maintenance/update_sha_hashes.php
 * BRIEF: Update SHA-256 hashes in script registry
 */

declare(strict_types=1);

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

use MokoEnterprise\CliFramework;

class UpdateShaHashesCli extends CliFramework
{
    private const REGISTRY_PATH = '.script-registry.json';

    private array $changes = [];

    protected function configure(): void
    {
        $this->setDescription('Update SHA-256 hashes for all scripts in the registry');
    }

    protected function run(): int
    {
        $this->logForced("SHA-256 Hash Update Tool");
        $this->logForced(str_repeat("=", 50));

        if ($this->dryRun) {
            $this->logForced("Mode: DRY RUN (no changes will be made)");
        }

        // Load registry
        $registry = $this->loadRegistry();

        // Update hashes
        $updatedRegistry = $this->updateHashes($registry);

        // Save if not dry run and there are changes
        if (!$this->dryRun && !empty($this->changes)) {
            $this->saveRegistry($updatedRegistry);
            $this->logForced("\nRegistry updated successfully");
        } elseif (empty($this->changes)) {
            $this->logForced("\nNo changes needed - all hashes are current");
        } else {
            $this->logForced("\nDry run complete - changes detected but not applied");
        }

        return 0;
    }

    private function loadRegistry(): array
    {
        if (!file_exists(self::REGISTRY_PATH)) {
            throw new \Exception("Registry file not found: " . self::REGISTRY_PATH);
        }

        $content = file_get_contents(self::REGISTRY_PATH);
        $registry = json_decode($content, true);

        if (json_last_error() !== JSON_ERROR_NONE) {
            throw new \Exception("Failed to parse registry JSON: " . json_last_error_msg());
        }

        $this->logVerbose("Registry loaded: " . count($registry['scripts']) . " scripts tracked");

        return $registry;
    }

    private function updateHashes(array $registry): array
    {
        $this->logVerbose("\nChecking scripts for changes...\n");

        foreach ($registry['scripts'] as $index => &$script) {
            $path = $script['path'];

            if (!file_exists($path)) {
                $this->logForced("Skipping missing file: {$path}");
                continue;
            }

            // Calculate current hash
            $currentHash = hash_file('sha256', $path);
            $currentSize = filesize($path);

            // Check if changed
            if ($currentHash !== $script['sha256']) {
                $this->changes[] = [
                    'path' => $path,
                    'old_hash' => $script['sha256'],
                    'new_hash' => $currentHash,
                ];

                $this->logForced("Hash updated: {$path}");

                if ($this->verbose) {
                    $this->logVerbose("   Old: {$script['sha256']}");
                    $this->logVerbose("   New: {$currentHash}");
                }

                // Update in registry
                $script['sha256'] = $currentHash;
                $script['size_bytes'] = $currentSize;
            } else {
                $this->logVerbose("No change: {$path}");
            }
        }

        // Update metadata timestamp if there are changes
        if (!empty($this->changes)) {
            $microtime = microtime(true);
            $dt = \DateTime::createFromFormat('U.u', sprintf('%.6f', $microtime), new \DateTimeZone('UTC'));
            if ($dt === false) {
                throw new \Exception("Failed to create DateTime from microtime");
            }
            $registry['metadata']['generated_at'] = $dt->format('Y-m-d\TH:i:s.u\Z');
        }

        $this->logForced("\nSummary:");
        $this->logForced("  Total scripts: " . count($registry['scripts']));
        $this->logForced("  Changed: " . count($this->changes));

        return $registry;
    }

    private function saveRegistry(array $registry): void
    {
        $json = json_encode($registry, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);

        if ($json === false) {
            throw new \Exception("Failed to encode registry JSON: " . json_last_error_msg());
        }

        if (file_put_contents(self::REGISTRY_PATH, $json) === false) {
            throw new \Exception("Failed to write registry file");
        }

        $this->logVerbose("Registry saved: " . self::REGISTRY_PATH);
    }

    private function logForced(string $message): void
    {
        echo $message . "\n";
    }

    private function logVerbose(string $message): void
    {
        if ($this->verbose) {
            echo $message . "\n";
        }
    }
}

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