<?php

namespace backend\forms;

use backend\models\Queue;
use common\helpers\KeyHelper;
use components\Curl;
use components\Exception;
use Yii;

/**
 * Class QueueForm
 * @package backend\forms
 */
class QueueForm extends BaseForm
{
	public $sign;

	public $queue;

	public $remark = '';

	/**
	 * @var array
	 */
	public $config = [];

	public $qid;

	public $force;//强制删除：用于删除库里没有的队列

	public function rules()
	{
		return [
			//create_queue
			[['config', 'remark'], 'safe', 'on' => 'create_queue'],
			[['sign', 'queue'], 'required', 'on' => 'create_queue'],
			['sign', 'filter', 'filter' => 'trim', 'on' => 'create_queue'],
			['sign', 'string', 'on' => 'create_queue'],
			['remark', 'default', 'value' => 'sys', 'on' => 'create_queue'],

			//delete_queue
			[['qid'], 'required', 'on' => 'delete_queue'],
		];
	}

	/**
	 * [创建队列]
	 * @author: libingke
	 * @return array
	 * @throws Exception
	 */
	public function createQueue()
	{
		try {
			$connect = new \PhpAmqpLib\Connection\AMQPStreamConnection(
				Yii::$app->Amqp->host,
				Yii::$app->Amqp->port,
				Yii::$app->Amqp->user,
				Yii::$app->Amqp->pass,
				Yii::$app->Amqp->vhost
			);
			$channel = $connect->channel();
			list($queue,,) = $channel->queue_declare($this->queue,
				false, true, false, false);

		} catch (\PhpAmqpLib\Exception\AMQPProtocolChannelException $e) {
			throw new Exception(2000, $e->getMessage());
		}

		$data = ['queue' => $queue];
		try {
			$one = Queue::findOne(['sign' => $this->sign]);
			if ($one)
				throw new Exception(2008);

			//save
			$one = new Queue();
			$one->qid = KeyHelper::getUniqueId('queue-add');
			$one->sign = $this->sign;
			$one->queue = $this->queue;
			$one->status = Queue::STATUS_YES;
			$one->remark = $this->remark;
			$one->config = serialize($this->config);
			if ($one->save()) {
				$data['qid'] = $one->qid;
				$data['sign'] = $one->sign;
				ksort($data);
			}

		} catch (\yii\db\Exception $e) {
			//todo db没有记录成功
		}

		return $data;
	}

	/**
	 * [删除队列]
	 * @author: libingke
	 * @return array
	 * @throws Exception
	 */
	public function deleteQueue()
	{
		$cb = function($name) {
			try {
				$connect = new \PhpAmqpLib\Connection\AMQPStreamConnection(
					Yii::$app->Amqp->host,
					Yii::$app->Amqp->port,
					Yii::$app->Amqp->user,
					Yii::$app->Amqp->pass,
					Yii::$app->Amqp->vhost
				);
				$channel = $connect->channel();
				$message = $channel->queue_delete($name,
					false, false, false, false
				);

			} catch (\PhpAmqpLib\Exception\AMQPProtocolChannelException $e) {
				$message = $e->getMessage();
			}
			return $message == 0 ? '' : $message;
		};

		$data = ['delete_count' => 0, 'delete_message' => ''];
		try {
			$one = Queue::findOne(['qid' => $this->qid, 'status' => Queue::STATUS_YES]);

			if ($one) {
				$one->status = Queue::STATUS_NO;
				if (($c = $cb($one->queue)) === '') {
					$one->update();
					$data['delete_count'] ++;
				}

				$data['delete_message'] = $c;
			} else {
				throw new Exception(2009);
			}

		} catch (\yii\db\Exception $e) {
			$data['delete_message'] = $e->getMessage();
		}

		return $data;
	}

	/**
	 * [获取消息列表]
	 * @author: libingke
	 */
	public function getQueueList()
	{
		$badCode = 2000;
		$authStr = Yii::$app->Amqp->getConfig('user') . ':' . Yii::$app->Amqp->getConfig('pass');
		/* URL */
		$vhost = urlencode(Yii::$app->Amqp->getConfig('vhost'));
		$url = Yii::$app->Amqp->getConfig('host') . ':' . Yii::$app->Amqp->getConfig('api_port') . "/api/queues";

		$curl = new Curl();
		$curl->setOption(CURLOPT_USERPWD, $authStr);
		$result = json_decode($curl->get($url), true);
		if ($curl->responseCode != 200)
			throw new Exception($badCode);
		if ($curl->errorText)
			throw new Exception($badCode, $curl->errorText);
		if (isset($result['error']) && is_string($result['error']))
			throw new Exception($badCode, $result['error']);

		$rows = [];
		foreach ($result as $k => $v) {
			//$name = $v['name'];
			$name = $v['name'];
			$rows[$name]['name'] 			= $name;
			$rows[$name]['messages_count']	= $v['messages'];
			$rows[$name]['message_bytes']	= $v['message_bytes'];
			$rows[$name]['messages_ready']	= $v['messages_ready'];
			//$rows[$name]['message_stats']	= $v['message_stats'];
			$rows[$name]['consumers_count']	= $v['consumers'];
			$rows[$name]['auto_delete']		= $v['auto_delete'];
			$rows[$name]['durable']			= $v['durable'];
			//$rows[$name]['arguments']		= $v['arguments'];
			$rows[$name]['state']			= $v['state'];
			$rows[$name]['idle_since']		= $v['idle_since'];
		}
		unset($result);

		return ['count' => count($rows), 'rows' => $rows];
	}
}