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<?php

    namespace Donut\Adapters;

    use Donut\IAdapter;
    use Donut\IProducer;
    use Donut\Message;
    use Donut\Time;
    use Nette\Utils\Json;
    use Ramsey\Uuid\Uuid;


    class MemoryAdapter implements IAdapter
    {
        /** @var string */
        private $logFile;

        /** @var Message[] */
        private $messages = array();

        /** @var array  [producerId => Time] */
        private $producers = array();

        /** @var array  [groupId => [key => TRUE]] */
        private $items = array();


        public function __construct($logFile)
        {
            $this->logFile = fopen($logFile, 'w');
        }


        /**
         * {@inheritdoc}
         */
        public function createMessage(Message $message)
        {
            $this->log('Created message', NULL, $message);
            $this->messages[] = $message;
        }


        /**
         * {@inheritdoc}
         */
        public function fetchMessage()
        {
            return array_shift($this->messages);
        }


        /**
         * {@inheritdoc}
         */
        public function markAsDone(Message $message, Time $processed)
        {
            $this->log('Mark as done', NULL, $message);
        }


        /**
         * {@inheritdoc}
         */
        public function markAsFailed(Message $message, Time $processed)
        {
            $this->log('Mark as failed', NULL, $message);
        }


        /**
         * {@inheritdoc}
         */
        public function log($subject, $text = NULL, Message $message = NULL, Time $date)
        {
            fwrite($this->logFile, implode("\n", array(
                '== ' . $date->getValue() . ' =========================================================',
                $subject,
                '-- Text: ---------------------------------------',
                $text,
                '-- Message: ------------------------------------',
                $message ? $message->getId()->toString() : NULL,
                $message ? json_encode($message->getData(), JSON_PRETTY_PRINT) : NULL,
                '',
            )));
        }


        /**
         * {@inheritdoc}
         */
        public function getProducerLastRun(IProducer $producer)
        {
            $id = $this->hashId($producer->getUniqueId());
            return isset($this->producers[$id]) ? $this->producers[$id] : NULL;
        }


        /**
         * {@inheritdoc}
         */
        public function saveProducerLastRun(IProducer $producer, Time $lastrun)
        {
            $id = $this->hashId($producer->getUniqueId());
            $this->producers[$id] = $lastrun;
        }


        /**
         * {@inheritdoc}
         */
        public function existsItem($group, $itemId)
        {
            return isset($this->items[$this->hashId($group)][$this->hashId($itemId)]);
        }


        /**
         * {@inheritdoc}
         */
        public function saveItem($group, $itemId)
        {
            $this->items[$this->hashId($group)][$this->hashId($itemId)] = TRUE;
        }


        /**
         * {@inheritdoc}
         */
        private function hashId($id)
        {
            return md5($id, TRUE);
        }
    }