<?php

namespace dominion\cache;

use Yii;
use Predis\Client;

class Connection extends \yii\redis\Connection
{
    /**
     * @var mixed Connection parameters for one or more servers.
     */
    public $parameters;
    /**
     * @var mixed Options to configure some behaviours of the client.
     */
    public $options;

    /**
     * @var Client redis socket connection
     */
    private $_socket = false;

    public function __call($name, $params)
    {
        $redisCommand = strtoupper(Inflector::camel2words($name, false));
        if (in_array($redisCommand, $this->redisCommands)) {
            return $this->executeCommand($redisCommand, $params);
        } else {
            return parent::__call($name, $params);
        }
    }

    public function executeCommand($name, $params = [])
    {
        $this->open();
        Yii::debug("Executing Redis Command: {$name} ". implode(' ', $params), __METHOD__);
        return $this->_socket->executeCommand(
            $this->_socket->createCommand($name, $params)
        );
    }

    /**
     * Closes the connection when this component is being serialized.
     * @return array
     */
    public function __sleep()
    {
        $this->close();
        return array_keys(get_object_vars($this));
    }

    /**
     * Returns a value indicating whether the DB connection is established.
     * @return bool whether the DB connection is established
     */
    public function getIsActive()
    {
        return $this->_socket !== false;
    }

    public function open()
    {
        if ($this->_socket !== false) {
            return;
        }
        Yii::debug('Opening redis DB connection: ' /*. var_export($this->parameters, true)*/, __METHOD__);
        $this->_socket = new Client($this->parameters, $this->options);
        $this->initConnection();
    }

    /**
     * Closes the currently active DB connection.
     * It does nothing if the connection is already closed.
     */
    public function close()
    {
        if ($this->_socket !== false) {
            Yii::debug('Closing DB connection: ' . var_export($this->parameters, true), __METHOD__);
            $this->_socket->disconnect();
            $this->_socket = false;
        }
    }

}