<?php

/*
 * This file is part of the NelmioApiDocBundle.
 *
 * (c) Nelmio <hello@nelm.io>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Nelmio\ApiDocBundle\Extractor\Handler;

use FOS\RestBundle\Controller\Annotations\QueryParam;
use FOS\RestBundle\Controller\Annotations\RequestParam;
use Nelmio\ApiDocBundle\Annotation\ApiDoc;
use Nelmio\ApiDocBundle\DataTypes;
use Nelmio\ApiDocBundle\Extractor\HandlerInterface;
use Symfony\Component\Routing\Route;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\Constraints\Regex;

class FosRestHandler implements HandlerInterface
{
    public function handle(ApiDoc $annotation, array $annotations, Route $route, \ReflectionMethod $method): void
    {
        foreach ($annotations as $annot) {
            if ($annot instanceof RequestParam) {
                $requirements = $this->handleRequirements($annot->requirements);
                $data = [
                    'required' => $annot->strict && false === $annot->nullable && null === $annot->default,
                    'dataType' => $requirements . ((property_exists($annot, 'map') ? $annot->map : $annot->array) ? '[]' : ''),
                    'actualType' => $this->inferType($requirements),
                    'subType' => null,
                    'description' => $annot->description,
                    'readonly' => false,
                ];
                if (false === $annot->strict) {
                    $data['default'] = $annot->default;
                }
                $annotation->addParameter($annot->name, $data);
            } elseif ($annot instanceof QueryParam) {
                if ($annot->strict && false === $annot->nullable && null === $annot->default) {
                    $annotation->addRequirement($annot->name, [
                        'requirement' => $this->handleRequirements($annot->requirements) . ((property_exists($annot, 'map') ? $annot->map : $annot->array) ? '[]' : ''),
                        'dataType' => '',
                        'description' => $annot->description,
                    ]);
                } elseif (null !== $annot->default) {
                    $annotation->addFilter($annot->name, [
                        'requirement' => $this->handleRequirements($annot->requirements) . ((property_exists($annot, 'map') ? $annot->map : $annot->array) ? '[]' : ''),
                        'description' => $annot->description,
                        'default' => $annot->default,
                    ]);
                } elseif (null !== $annot->requirements) {
                    $annotation->addFilter($annot->name, [
                        'requirement' => $this->handleRequirements($annot->requirements) . ((property_exists($annot, 'map') ? $annot->map : $annot->array) ? '[]' : ''),
                        'description' => $annot->description,
                    ]);
                } else {
                    $annotation->addFilter($annot->name, [
                        'description' => $annot->description,
                    ]);
                }
            }
        }
    }

    /**
     * Handle FOSRestBundle requirements in order to return a string.
     *
     * @return string
     */
    private function handleRequirements($requirements)
    {
        if (is_object($requirements) && $requirements instanceof Constraint) {
            if ($requirements instanceof Regex) {
                return $requirements->getHtmlPattern();
            }
            $class = $requirements::class;

            return substr($class, strrpos($class, '\\') + 1);
        }

        if (is_array($requirements) && isset($requirements['rule'])) {
            return (string) $requirements['rule'];
        }

        if (is_array($requirements) && array_key_exists(0, $requirements)) {
            $output = [];

            foreach ($requirements as $req) {
                if (is_object($req) && $req instanceof Constraint) {
                    if ($req instanceof Regex) {
                        $output[] = $req->getHtmlPattern();
                    } else {
                        $class = $req::class;
                        $output[] = substr($class, strrpos($class, '\\') + 1);
                    }
                }

                if (is_array($req)) {
                    if (array_key_exists('_format', $req)) {
                        $output[] = 'Format: ' . $req['_format'];
                    } elseif (isset($req['rule'])) {
                        $output[] = $req['rule'];
                    }
                }
            }

            return implode(', ', $output);
        }

        return (string) $requirements;
    }

    public function inferType($requirement)
    {
        if (DataTypes::isPrimitive($requirement)) {
            return $requirement;
        }

        return DataTypes::STRING;
    }
}