<?php

namespace App\Classes\General;

use App\Classes\Exceptions\MalformedRequestException;
use App\Classes\General\Open1688\SignatureUtil;
use Symfony\Component\HttpFoundation\Exception\BadRequestException;

class Open1688Helper
{

    public static function productSearchKeyword($keyword, $page) {
       $requestData = [
        'offerQueryParam' => "{\"keyword\":\"$keyword\",\"beginPage\":$page,\"pageSize\":18,\"country\":\"en\"}",
       ];

       return self::getFromOpen1688($requestData, config('open1688.product_search_keyword_api'));
    }

    public static function productDetail($offerId) {
        $requestData = [
            'offerDetailParam' => "{\"offerId\":$offerId,\"country\":\"en\"}",
           ];
    
        return self::getFromOpen1688($requestData, config('open1688.product_detail_api'));
    }

    private static function getFromOpen1688($requestData, $apiName) {
        $requestData["access_token"] = config('open1688.access_token');
    
        $signaturedStr = self::generateRequestSignature($apiName, $requestData);
        $url = config('open1688.url') . $apiName . "/" . config('open1688.app_key') . "?_aop_signature=" . $signaturedStr;


        foreach($requestData as $k => $v) {
            $url = $url . "&$k=$v";
        }

        try {
            $client = new \GuzzleHttp\Client(['verify' => false]);
            $response = $client->request('GET', $url);
            $body = $response->getBody();
            $contents = json_decode($body, true);

            return $contents['result']['result'];
        } catch(\GuzzleHttp\Exception\RequestException $exception){
            throw new MalformedRequestException(json_decode($exception->getResponse()->getBody()->getContents(), true)['error_message']);
        }

    }

    private static function generateRequestSignature ($apiName, $requestData) {
        $pathToSign = self::generateAPIPath($apiName);
        $signaturedStr = SignatureUtil::signature ($pathToSign, $requestData);

        return $signaturedStr;
    }

    private static function generateAPIPath($apiName) {
		$urlResult = "";
		$defs = array (
				$urlResult,
				"param2",
				"/",
				"1",
				"/",
				"com.alibaba.fenxiao.crossborder",
				"/",
				$apiName,
				"/",
				config('open1688.app_key') 
		);
		
		$urlResult = implode ( $defs );
		
		return $urlResult;
	}

}