// To Scrape the Amazon Website

const puppeteer = require('puppeteer');

// To print table in the output

const Table = require('cli-table');

const table = new Table({

head: ['Product Name', 'Price', 'Ratings'],

colWidths: [140, 10, 10]

})

// To get user arguments

const args = process.argv;

const amazon = (async () => {

// Launching the browser

const browser = await puppeteer.launch({ timeout: 0 })

const page = await browser.newPage()

await page.goto("https://www.amazon.com/", { timeout: 0, waitUntil: 'domcontentloaded' })

// Getting the User Input

const name = args[2]

// Selecting the Search Box

const elementHandle = await page.$('input#twotabsearchtextbox.nav-input')

// Typing in the user argument in the search box

await elementHandle.type(name)

// Pressing Enter

await elementHandle.press('Enter')

await page.waitForNavigation({waitUntil: "domcontentloaded"})

const results = await page.evaluate(() => {

const searchresult = Array.from(document.querySelectorAll('.s-result-item.s-asin'))

return searchresult.map(r => {

if (r.querySelector(".a-price")) {

return {

product: r.querySelector(".a-color-base.a-text-normal").textContent,

price: (r.querySelector(".a-price").textContent),

ratings: r.querySelector(".a-icon-alt") ? r.querySelector(".a-icon-alt").textContent : "NA"

};

}

}).slice(0,5)

})

// Printing the results

console.log("\nHere are the top 5 products based on your search: \n")

for(let i=0 ; i<5 ; i++){

table.push(

[`${results[i].product}`, `${results[i].price}`, `${results[i].ratings.slice(0, 3)}`]

)

}

console.log(table.toString())

await browser.close()

})

// Calling the function

if(args.length === 2)

console.log('Correct Command Usage: `node index.js "product-name"`')

else

amazon()