<?php

declare(strict_types=1);

namespace App\Command;

use Hyperf\Command\Command as HyperfCommand;
use Hyperf\Command\Annotation\Command;
use Psr\Container\ContainerInterface;
use PhpAmqpLib\Connection\AMQPStreamConnection;
use Hyperf\Contract\ConfigInterface;

#[Command]
class AppMqStatus extends HyperfCommand
{
    public function __construct(protected ContainerInterface $container)
    {
        parent::__construct('app:mq:status');
    }

    public function configure()
    {
        parent::configure();
        $this->setDescription('Display message counts for all accessible queues');
        $this->addOption('watch', 'w', null, 'Watch mode - refresh every N seconds (default: 3)');
        $this->addOption('interval', 'i', \Symfony\Component\Console\Input\InputOption::VALUE_OPTIONAL, 'Refresh interval in seconds', '3');
    }

    public function handle()
    {
        $watchMode = $this->input->getOption('watch');
        $interval = (int) $this->input->getOption('interval');

        if ($watchMode) {
            $this->info("Watch mode enabled. Refreshing every {$interval} seconds. Press Ctrl+C to exit.");
            $this->line('');

            while (true) {
                // 清屏（对于支持 ANSI 的终端）
                $this->output->write("\033[2J\033[H");
                $this->displayQueueStatus();
                sleep($interval);
            }
        } else {
            return $this->displayQueueStatus();
        }
    }

    private function displayQueueStatus(): int
    {
        $this->line('Fetching queue status... ' . date('Y-m-d H:i:s'), 'info');

        try {
            $config = $this->container->get(ConfigInterface::class);
            $consumerConfig = $config->get('amqp.default_consumer');

            // 创建连接
            $connection = new AMQPStreamConnection(
                $consumerConfig['host'],
                $consumerConfig['port'],
                $consumerConfig['user'],
                $consumerConfig['password'],
                $consumerConfig['vhost'],
                false,
                'AMQPLAIN',
                null,
                'en_US',
                $consumerConfig['params']['connection_timeout'] ?? 3.0,
                $consumerConfig['params']['read_write_timeout'] ?? 3.0,
                null,
                $consumerConfig['params']['keepalive'] ?? false,
                $consumerConfig['params']['heartbeat'] ?? 0
            );

            $channel = $connection->channel();

            // 获取所有队列信息
            $queues = $this->getQueuesFromAnnotations();

            $tableData = [];
            $totalMessages = 0;

            foreach ($queues as $queueName) {
                try {
                    // 使用 passive=true 来获取队列信息而不创建队列
                    // queue_declare 返回 [queue_name, message_count, consumer_count]
                    [$queue, $messageCount, $consumerCount] = $channel->queue_declare(
                        $queueName,
                        true,  // passive
                        true,  // durable
                        false, // exclusive
                        false  // auto_delete
                    );

                    $tableData[] = [
                        'queue' => $queueName,
                        'messages' => $messageCount,
                        'consumers' => $consumerCount,
                        'status' => $messageCount > 0 ? '<fg=yellow>Has Messages</>' : '<fg=green>Empty</>',
                    ];

                    $totalMessages += $messageCount;
                } catch (\Exception $e) {
                    $tableData[] = [
                        'queue' => $queueName,
                        'messages' => 'N/A',
                        'consumers' => 'N/A',
                        'status' => '<fg=red>Error: ' . $e->getMessage() . '</>',
                    ];
                }
            }

            // 关闭连接
            $channel->close();
            $connection->close();

            // 显示表格
            if (empty($tableData)) {
                $this->warn('No queues found.');
                return 0;
            }

            $this->table(
                ['Queue Name', 'Messages', 'Consumers', 'Status'],
                array_map(function($row) {
                    return [$row['queue'], $row['messages'], $row['consumers'], $row['status']];
                }, $tableData)
            );

            $this->line('');
            $this->info("Total messages across all queues: {$totalMessages}");

            return 0;
        } catch (\Exception $e) {
            $this->error('Failed to fetch queue status: ' . $e->getMessage());
            $this->line('Trace: ' . $e->getTraceAsString(), 'comment');
            return 1;
        }
    }

    /**
     * 扫描所有使用 Consumer 注解的类，获取队列名称
     */
    private function getQueuesFromAnnotations(): array
    {
        $queues = [];

        // 扫描 Platform 目录下的所有 Consumer
        $platformPath = BASE_PATH . '/app/Platform';

        if (is_dir($platformPath)) {
            $this->scanDirectory($platformPath, $queues);
        }

        // 如果没有找到任何队列，返回一些默认的队列名称
        if (empty($queues)) {
            $queues = ['orders.queue'];
        }

        return array_unique($queues);
    }

    /**
     * 递归扫描目录，查找包含 Consumer 注解的类
     */
    private function scanDirectory(string $path, array &$queues): void
    {
        $files = scandir($path);

        foreach ($files as $file) {
            if ($file === '.' || $file === '..') {
                continue;
            }

            $filePath = $path . '/' . $file;

            if (is_dir($filePath)) {
                $this->scanDirectory($filePath, $queues);
            } elseif (is_file($filePath) && pathinfo($filePath, PATHINFO_EXTENSION) === 'php') {
                $content = file_get_contents($filePath);

                // 查找 Consumer 注解中的 queue 参数
                if (preg_match('/#\[Consumer\([^)]*queue:\s*["\']([^"\']+)["\']/', $content, $matches)) {
                    $queues[] = $matches[1];
                }
            }
        }
    }
}