<?php

declare(strict_types=1);

namespace App\Framework\ErrorAggregation;

use App\Framework\Cache\Cache;
use App\Framework\Config\Environment;
use App\Framework\Database\ConnectionInterface;
use App\Framework\DateTime\Clock;
use App\Framework\DI\Container;
use App\Framework\DI\Initializer;
use App\Framework\ErrorAggregation\Alerting\AlertManager;
use App\Framework\ErrorAggregation\Alerting\EmailAlertChannel;
use App\Framework\ErrorAggregation\Storage\DatabaseErrorStorage;
use App\Framework\ErrorAggregation\Storage\ErrorStorageInterface;
use App\Framework\Logging\Logger;
use App\Framework\Queue\Queue;
use App\Framework\Mail\TransportInterface;

/**
 * Initializer for Error Aggregation services
 */
final readonly class ErrorAggregationInitializer
{
    public function __construct(
        private Environment $env,
    ){}

    #[Initializer]
    public function initErrorAggregator(Container $container): ErrorAggregatorInterface
    {
        $enabled = $this->env->getBool('ERROR_AGGREGATION_ENABLED', true);

        if(!$enabled) {
            return new NullErrorAggregator();
        }

        return new ErrorAggregator(
            storage: $container->get(ErrorStorageInterface::class),
            cache: $container->get(Cache::class),
            clock: $container->get(Clock::class),
            alertQueue: $container->get(Queue::class),
            logger: $container->get(Logger::class),
            batchSize: $this->env->getInt('ERROR_AGGREGATION_BATCH_SIZE', 100),
            maxRetentionDays: $this->env->getInt('ERROR_AGGREGATION_MAX_RETENTION_DAYS', 90)
        );
    }

    #[Initializer]
    public function initialize(Container $container): void
    {
        $env = $container->get(Environment::class);
        $enabled = $env->getBool('ERROR_AGGREGATION_ENABLED', true);

        // Storage
        $container->bind(ErrorStorageInterface::class, function (Container $container) use ($enabled) {
            if (! $enabled) {
                // Return a no-op storage if disabled
                return new DatabaseErrorStorage(
                    connection: $container->get(ConnectionInterface::class)
                );
            }

            return new DatabaseErrorStorage(
                connection: $container->get(ConnectionInterface::class)
            );
        });

        // Error Aggregator Interface - bind to concrete or Null implementation
//        $container->bind(ErrorAggregatorInterface::class, function (Container $container) use ($enabled) {
//            if (! $enabled) {
//                return new NullErrorAggregator();
//            }
//
//            $env = $container->get(Environment::class);
//            return new ErrorAggregator(
//                storage: $container->get(ErrorStorageInterface::class),
//                cache: $container->get(Cache::class),
//                clock: $container->get(Clock::class),
//                alertQueue: $container->get(Queue::class),
//                logger: $container->get(Logger::class),
//                batchSize: $env->getInt('ERROR_AGGREGATION_BATCH_SIZE', 100),
//                maxRetentionDays: $env->getInt('ERROR_AGGREGATION_MAX_RETENTION_DAYS', 90)
//            );
//        });

        // Error Aggregator (concrete class) - delegate to interface
        $container->bind(ErrorAggregator::class, function (Container $container) use ($enabled) {
            if (! $enabled) {
                throw new \RuntimeException('ErrorAggregator is disabled. Use ErrorAggregatorInterface instead.');
            }

            $env = $container->get(Environment::class);
            return new ErrorAggregator(
                storage: $container->get(ErrorStorageInterface::class),
                cache: $container->get(Cache::class),
                clock: $container->get(Clock::class),
                alertQueue: $container->get(Queue::class),
                logger: $container->get(Logger::class),
                batchSize: $env->getInt('ERROR_AGGREGATION_BATCH_SIZE', 100),
                maxRetentionDays: $env->getInt('ERROR_AGGREGATION_MAX_RETENTION_DAYS', 90)
            );
        });

        // Alert Manager
        $container->bind(AlertManager::class, function (Container $container) {
            $env = $container->get(Environment::class);
            $channels = [];

            // Email channel (if configured)
            $emailRecipients = $env->get('ALERT_EMAIL_RECIPIENTS');
            if (! empty($emailRecipients)) {
                $recipients = explode(',', $emailRecipients);
                $channels[] = new EmailAlertChannel(
                    transport: $container->get(TransportInterface::class),
                    recipients: array_map('trim', $recipients),
                    fromEmail: $env->get('ALERT_FROM_EMAIL', 'alerts@example.com'),
                    fromName: $env->get('ALERT_FROM_NAME', 'Error Alert System')
                );
            }

            return new AlertManager(
                cache: $container->get(Cache::class),
                clock: $container->get(Clock::class),
                retryQueue: $container->get(Queue::class),
                logger: $container->get(Logger::class),
                channels: $channels,
                throttleConfig: [
                    'urgent' => $env->getInt('ALERT_THROTTLE_URGENT', 300),
                    'high' => $env->getInt('ALERT_THROTTLE_HIGH', 900),
                    'medium' => $env->getInt('ALERT_THROTTLE_MEDIUM', 3600),
                    'low' => $env->getInt('ALERT_THROTTLE_LOW', 86400),
                ]
            );
        });

        // Middleware
        $container->bind(ErrorAggregationMiddleware::class, function (Container $container) use ($enabled) {
            return new ErrorAggregationMiddleware(
                errorAggregator: $container->get(ErrorAggregator::class),
                enabled: $enabled
            );
        });
    }
}