<?php

namespace Ardent\ParameterBundle\Service;

use Ardent\ParameterBundle\DependencyInjection\Configuration;
use Ardent\ParameterBundle\Entity\Parameter;
use Doctrine\ORM\EntityManagerInterface;
use Symfony\Component\DependencyInjection\ParameterBag\ParameterBagInterface;
use Symfony\Component\Form\Extension\Core\Type\NumberType;
use Symfony\Component\Form\Extension\Core\Type\TextType;

class ParameterService
{
    /** @var EntityManagerInterface */
    private $em;

    /** @var ParameterBagInterface */
    private $parameter;
    private $config;

    /**
     * ParameterService constructor.
     *
     * @param EntityManagerInterface $em
     * @param ParameterBagInterface $parameter
     * @param $config
     */
    public function __construct(EntityManagerInterface $em, ParameterBagInterface $parameter, $config)
    {
        $this->em = $em;
        $this->parameter = $parameter;
        $this->config = $this->supplementConfig($config);
    }

    /**
     * @param string $name
     * @param bool $parse
     *
     * @return string
     */
    public function get($name, $parse = true)
    {
        $paramRepo = $this->em->getRepository(Parameter::class);
        $parameter = $paramRepo->findOneBy(['name' => $name]);
        if ($parameter) {
            if ($parse) {
                // find and replace all %parameter% with their value
                $value = preg_replace_callback('/%([^%\s]+)%/', function ($match) {
                    $key = $match[1];
                    // first try locally
                    if ($value = $this->get($key)) {
                        return $value;
                    }
                    // then try with parameter bag
                    return $this->parameter->get($key);
                },
                    $parameter->getValue()
                );
            } else {
                $value = $parameter->getValue();
            }

            return $value;
        } else {
            return null;
        }
    }

    /**
     * @param $name
     * @param $value
     */
    public function set($name, $value)
    {
        $paramRepo = $this->em->getRepository(Parameter::class);
        /* @var Parameter $parameter */
        $parameter = $paramRepo->findOneBy(['name' => $name]);
        if (!$parameter) {
            $parameter = (new Parameter())->setName($name);
        }
        $parameter->setValue($value);
        $this->em->persist($parameter);
        $this->em->flush();
    }

    /**
     * Replaces the types in the config by their classes
     *
     * @param $config
     * @return array
     */
    private function supplementConfig($config)
    {
        foreach ($config as $groupName => &$group) {
            foreach ($group as &$value) {
                switch ($value['type']) {
                    default:
                    case Configuration::TYPE_TEXT:
                        $class = TextType::class;
                        break;
                    case Configuration::TYPE_NUMBER:
                        $class = NumberType::class;
                        break;
                }

                $value['name'] = sprintf('%s_%s', $groupName, $value['name']);
                $value['type'] = $class;
                unset($value);
            }
            unset($group);
        }
        return $config;
    }

    /**
     * @return array
     */
    public function getConfig()
    {
        return $this->config;
    }
}