const { randomNumber }    = require('./randomNumber');
const errorHandling       = require('../../utils/errorHandling');
const { serverError }     = require('../../config/errors');
const { SCRAPER_API_KEY } = require('../../config/config');
const axios               = require('axios');
const { JSDOM }           = require("jsdom");

const subjectList = [
    "smartphone",
    "pc+gamer",
    "pc+portable",
    "TV",
    "casque",
    "clavier",
    "souris",
    "ecran",
    "jeux+vidéos"
];

function getRandomArrayElement(array) {
    return array[randomNumber(0, array.length - 1)];
}

async function getAmazonProductList(subject) {
    const url               = `https://www.amazon.fr/s?k=${subject}`;
    const { data }          = await axios.get(`http://api.scraperapi.com/?api_key=${SCRAPER_API_KEY}&url=${url}`);
    const { document }      = (new JSDOM(data)).window;
    const amazonProductList = document.querySelectorAll('.s-result-item');
    const productsList      = [];
    for (let indexProduct in amazonProductList) {
        try {   
            const elementProduct = amazonProductList[indexProduct];
            const productImage   = elementProduct.querySelector('.s-image');
            const originalPrice  = elementProduct.querySelector(".a-price-whole").innerHTML;
            productsList.push({
                name: productImage["alt"],
                image: productImage["src"],
                price: Number(originalPrice.replace(",", ".").replace(" ", ""))
            });
        } catch (_error) {
            continue;
        }
    }
    return productsList;
}

module.exports = rightPriceOutput = async ({ res, next }, _argsObject) => {
    const subject = getRandomArrayElement(subjectList);
    try {
        const productsList  = await getAmazonProductList(subject);
        const randomProduct = getRandomArrayElement(productsList);
        return res.status(200).json({ subject, ...randomProduct });
    } catch (error) {
        console.error(error);
        return errorHandling(next, serverError);
    }
}