<?php

/**
 * Gearman Bundle for Symfony2
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * Feel free to edit as you please, and have fun.
 *
 * @author Marc Morera <yuhu@mmoreram.com>
 */

namespace Mmoreram\GearmanBundle\Module;

use ReflectionMethod;
use Symfony\Component\DependencyInjection\ContainerAware;

use Mmoreram\GearmanBundle\Driver\Gearman\Job as JobAnnotation;

/**
 * Job class
 *
 * This class provide all worker definition.
 *
 * @since 2.3.1
 */
class JobClass extends ContainerAware
{
    /**
     * @var string
     *
     * Default description when is not defined
     */
    const DEFAULT_DESCRIPTION = 'No description is defined';

    /**
     * @var string
     *
     * Callable name for this job
     * If is setted on annotations, this value will be used
     *  otherwise, natural method name will be used.
     */
    private $callableName;

    /**
     * @var string
     *
     * Method name
     */
    private $methodName;

    /**
     * @var string
     *
     * RealCallable name for this job without the job prefix
     *
     */
    private $realCallableNameNoPrefix;

    /**
     * @var string
     *
     * RealCallable name for this job
     * natural method name will be used.
     */
    private $realCallableName;

    /**
     * @var string
     *
     * Description of Job
     */
    private $description;

    /**
     * @var integer
     *
     * Number of iterations this job will be alive before die
     */
    private $iterations;

    /**
     * @var string
     *
     * Default method this job will be call into Gearman client
     */
    private $defaultMethod;

    /**
     * @var int
     *
     * Job minimum execution time
     */
    private $minimumExecutionTime;

    /**
     * @var int
     *
     * Timeout for idle worker
     */
    private $timeout;

    /**
     * @var array
     *
     * Collection of servers to connect
     */
    private $servers;

    /**
     * @var string
     *
     * The prefix to be prepended to all job callable names.
     */
    private $jobPrefix;

    /**
     * Construct method
     *
     * @param JobAnnotation    $jobAnnotation     JobAnnotation class
     * @param ReflectionMethod $reflectionMethod  ReflextionMethod class
     * @param string           $callableNameClass Callable name class
     * @param array            $servers           Array of servers defined for Worker
     * @param array            $defaultSettings   Default settings for Worker
     */
    public function __construct(
        JobAnnotation $jobAnnotation,
        ReflectionMethod $reflectionMethod,
        $callableNameClass,
        array $servers,
        array $defaultSettings
    )
    {

        $this->callableName = is_null($jobAnnotation->name)
            ? $reflectionMethod->getName()
            : $jobAnnotation->name;

        $this->methodName = $reflectionMethod->getName();
        $this->realCallableNameNoPrefix = str_replace('\\', '', $callableNameClass . '~' . $this->callableName);

        $this->jobPrefix = isset($defaultSettings['jobPrefix'])
            ? $defaultSettings['jobPrefix']
            : null;

        $this->realCallableName = $this->jobPrefix . $this->realCallableNameNoPrefix;
        $this->description = is_null($jobAnnotation->description)
            ? self::DEFAULT_DESCRIPTION
            : $jobAnnotation->description;

        $this->servers = $this->loadServers($jobAnnotation, $servers);
        $this->iterations = $this->loadIterations($jobAnnotation, $defaultSettings);
        $this->minimumExecutionTime = $this->loadMinimumExecutionTime($jobAnnotation, $defaultSettings);
        $this->timeout = $this->loadTimeout($jobAnnotation, $defaultSettings);
        $this->defaultMethod = $this->loadDefaultMethod($jobAnnotation, $defaultSettings);
    }

    /**
     * Load servers
     *
     * If any server is defined in JobAnnotation, this one is used.
     * Otherwise is used servers set in Class
     *
     * @param JobAnnotation $jobAnnotation JobAnnotation class
     * @param array         $servers       Array of servers defined for Worker
     *
     * @return array Servers
     */
    private function loadServers(JobAnnotation $jobAnnotation, array $servers)
    {

        /**
         * If is configured some servers definition in the worker, overwrites
         */
        if ($jobAnnotation->servers) {

            $servers = (is_array($jobAnnotation->servers) && !isset($jobAnnotation->servers['host']))
                ? $jobAnnotation->servers
                : array($jobAnnotation->servers);
        }

        return $servers;
    }

    /**
     * Load iterations
     *
     * If iterations is defined in JobAnnotation, this one is used.
     * Otherwise is used set in Class
     *
     * @param JobAnnotation $jobAnnotation   JobAnnotation class
     * @param array         $defaultSettings Default settings for Worker
     *
     * @return integer Iteration
     */
    private function loadIterations(JobAnnotation $jobAnnotation, array $defaultSettings)
    {
        return is_null($jobAnnotation->iterations)
            ? (int) $defaultSettings['iterations']
            : (int) $jobAnnotation->iterations;
    }

    /**
     * Load defaultMethod
     *
     * If defaultMethod is defined in JobAnnotation, this one is used.
     * Otherwise is used set in Class
     *
     * @param JobAnnotation $jobAnnotation   JobAnnotation class
     * @param array         $defaultSettings Default settings for Worker
     *
     * @return string Default method
     */
    private function loadDefaultMethod(JobAnnotation $jobAnnotation, array $defaultSettings)
    {
        return is_null($jobAnnotation->defaultMethod)
            ? $defaultSettings['method']
            : $jobAnnotation->defaultMethod;
    }

    /**
     * Load minimumExecutionTime
     *
     * If minimumExecutionTime is defined in JobAnnotation, this one is used.
     * Otherwise is used set in Class
     *
     * @param JobAnnotation $jobAnnotation
     * @param array $defaultSettings
     *
     * @return int
     */
    private function loadMinimumExecutionTime(JobAnnotation $jobAnnotation, array $defaultSettings)
    {
        return is_null($jobAnnotation->minimumExecutionTime)
            ? (int) $defaultSettings['minimumExecutionTime']
            : (int) $jobAnnotation->minimumExecutionTime;
    }

    /**
     * Load timeout
     *
     * If timeout is defined in JobAnnotation, this one is used.
     * Otherwise is used set in Class
     *
     * @param JobAnnotation $jobAnnotation
     * @param array $defaultSettings
     *
     * @return int
     */
    private function loadTimeout(JobAnnotation $jobAnnotation, array $defaultSettings)
    {
        return is_null($jobAnnotation->timeout)
            ? (int) $defaultSettings['timeout']
            : (int) $jobAnnotation->timeout;
    }

    /**
     * Retrieve all Job data in cache format
     *
     * @return array
     */
    public function toArray()
    {
        return array(

            'callableName'             => $this->callableName,
            'methodName'               => $this->methodName,
            'realCallableName'         => $this->realCallableName,
            'jobPrefix'                => $this->jobPrefix,
            'realCallableNameNoPrefix' => $this->realCallableNameNoPrefix,
            'description'              => $this->description,
            'iterations'               => $this->iterations,
            'minimumExecutionTime'     => $this->minimumExecutionTime,
            'timeout'                  => $this->timeout,
            'servers'                  => $this->servers,
            'defaultMethod'            => $this->defaultMethod,
        );
    }
}