<?php

namespace App\Providers;

use Illuminate\Support\ServiceProvider;
use Monolog\Logger;
use Aws\CloudWatchLogs\CloudWatchLogsClient;
use Monolog\Handler\StreamHandler;
use App\Logging\CloudWatchHandler;

class AuditLogServiceProvider extends ServiceProvider
{
    /**
     * Defer loading if strictly necessary, but for now we keep it eager
     * to ensure the singleton is available globally.
     *
     * @var bool
     */
    protected $defer = false;

    /**
     * Register the application services.
     *
     * @return void
     */
    public function register(){
        $this->app->singleton('audit.logger', function ($app) {
            $logger = new Logger('audit');
            
            $driver = env('AUDIT_LOG_DRIVER', 'cloudwatch');

            if ($driver === 'cloudwatch') {
                // 1. Configure AWS Client
                $config = [
                        'region'  => _env('AWS_DEFAULT_REGION', 'ap-south-1'),
                        'version' => _env('CLOUDWATCH_VERSION', 'latest'),
                        'credentials' => [
                            'key'    => _env('CLOUDWATCH_ACCESS_KEY'), 
                            'secret' => _env('CLOUDWATCH_SECRET_KEY'),
                        ]
                    ];

                $client = new CloudWatchLogsClient($config);
                $logGroup = _env('CLOUDWATCH_GROUP', '/aws/cf-admin-laravel');

                // 2. Instantiate our Custom Handler
                $handler = new CloudWatchHandler($client, $logGroup);
                
                // 3. Push to Logger
                $logger->pushHandler($handler);

            } else {
                // Local Dev Fallback
                $logPath = storage_path('logs/audit.log');
                $logger->pushHandler(new StreamHandler($logPath, Logger::INFO));
            }

            return $logger;
        });
    }
}