<?php

namespace DynamicOOOS\PayPalHttp;

use DynamicOOOS\PayPalHttp\Serializer\Form;
use DynamicOOOS\PayPalHttp\Serializer\Json;
use DynamicOOOS\PayPalHttp\Serializer\Multipart;
use DynamicOOOS\PayPalHttp\Serializer\Text;
/**
 * Class Encoder
 * @package PayPalHttp
 *
 * Encoding class for serializing and deserializing request/response.
 */
class Encoder
{
    private $serializers = [];
    function __construct()
    {
        $this->serializers[] = new Json();
        $this->serializers[] = new Text();
        $this->serializers[] = new Multipart();
        $this->serializers[] = new Form();
    }
    public function serializeRequest(HttpRequest $request)
    {
        if (!\array_key_exists('content-type', $request->headers)) {
            $message = "HttpRequest does not have Content-Type header set";
            echo $message;
            throw new \Exception($message);
        }
        $contentType = $request->headers['content-type'];
        /** @var Serializer $serializer */
        $serializer = $this->serializer($contentType);
        if (\is_null($serializer)) {
            $message = \sprintf("Unable to serialize request with Content-Type: %s. Supported encodings are: %s", $contentType, \implode(", ", $this->supportedEncodings()));
            echo $message;
            throw new \Exception($message);
        }
        if (!(\is_string($request->body) || \is_array($request->body))) {
            $message = "Body must be either string or array";
            echo $message;
            throw new \Exception($message);
        }
        $serialized = $serializer->encode($request);
        if (\array_key_exists("content-encoding", $request->headers) && $request->headers["content-encoding"] === "gzip") {
            $serialized = \gzencode($serialized);
        }
        return $serialized;
    }
    public function deserializeResponse($responseBody, $headers)
    {
        if (!\array_key_exists('content-type', $headers)) {
            $message = "HTTP response does not have Content-Type header set";
            echo $message;
            throw new \Exception($message);
        }
        $contentType = $headers['content-type'];
        /** @var Serializer $serializer */
        $serializer = $this->serializer($contentType);
        if (\is_null($serializer)) {
            throw new \Exception(\sprintf("Unable to deserialize response with Content-Type: %s. Supported encodings are: %s", $contentType, \implode(", ", $this->supportedEncodings())));
        }
        if (\array_key_exists("content-encoding", $headers) && $headers["content-encoding"] === "gzip") {
            $responseBody = \gzdecode($responseBody);
        }
        return $serializer->decode($responseBody);
    }
    private function serializer($contentType)
    {
        /** @var Serializer $serializer */
        foreach ($this->serializers as $serializer) {
            try {
                if (\preg_match($serializer->contentType(), $contentType) == 1) {
                    return $serializer;
                }
            } catch (\Exception $ex) {
                $message = \sprintf("Error while checking content type of %s: %s", \get_class($serializer), $ex->getMessage());
                echo $message;
                throw new \Exception($message, $ex->getCode(), $ex);
            }
        }
        return NULL;
    }
    private function supportedEncodings()
    {
        $values = [];
        /** @var Serializer $serializer */
        foreach ($this->serializers as $serializer) {
            $values[] = $serializer->contentType();
        }
        return $values;
    }
}
