const { error: { catchErrors, wrapErrors, HttpError }, fetch, url } = require('puffy')

const getWebContent = uri => catchErrors((async () => {
    const { status, data } = await fetch.get({ uri })
    if (status > 300)
        throw new HttpError(`Failed to get content located at ${uri}`, status)
    else
        return data
})())

const getBlogTitle = domain => catchErrors((async () => {
    const websiteUrl = url.buildUrl({
        origin: domain,
        pathname: '//blog.html'
    })

    const [websiteErrors, website] = await getWebContent(websiteUrl)
    if (websiteErrors)
        throw wrapErrors(`Error while loading web page ${websiteUrl}`, websiteErrors)

    const websiteTitle = (website.match(/<title>(.*?)<\/title>/) || [])[1] || ''

    if (!websiteTitle)
        throw new Error(`Web page ${websiteUrl} is missing a required title header`)
    return websiteTitle
})())

const main = async () => {
    const NEAP = 'https://neap.co'
    const GOOGLE = 'https://google.com'
    const [neapErrors, neapBlogTitle] = await getBlogTitle(NEAP)
    const [googleErrors, googleBlogTitle] = await getBlogTitle(GOOGLE)

    if (neapErrors) {
        console.log(`Failed to get the blog title for ${NEAP}`)
        neapErrors.forEach(e => console.log(e.stack))
    } else 
        console.log(`Awesome, the blog title for ${NEAP} is: ${neapBlogTitle}`)
    
    if (googleErrors) {
        console.log(`Failed to get the blog title for ${GOOGLE}`)
        googleErrors.forEach(e => console.log(e.stack))
    } else 
        console.log(`Awesome, the blog title for ${GOOGLE} is: ${googleBlogTitle}`)
}

main()