<?php declare(strict_types = 1);

namespace MailPoet\Automation\Engine\Control;

use Exception;
use MailPoet\Automation\Engine\Exceptions\InvalidStateException;
use MailPoet\Automation\Engine\Hooks;
use MailPoet\Automation\Engine\WordPress;
use Throwable;

class StepRunner {
  /** @var WordPress */
  private $wordPress;

  public function __construct(
    WordPress $wordPress
  ) {
    $this->wordPress = $wordPress;
  }

  public function initialize(): void {
    $this->wordPress->addAction(Hooks::WORKFLOW_STEP, [$this, 'run']);
  }

  /** @param mixed $args */
  public function run($args): void {
    // Action Scheduler catches only Exception instances, not other errors.
    // We need to convert them to exceptions to be processed and logged.
    try {
      $this->runStep($args);
    } catch (Throwable $e) {
      if (!$e instanceof Exception) {
        throw new Exception($e->getMessage(), intval($e->getCode()), $e);
      }
      throw $e;
    }
  }

  /** @param mixed $args */
  private function runStep($args): void {
    // TODO: args validation
    if (!is_array($args)) {
      throw new InvalidStateException();
    }

    // TODO: process step
  }
}