module.exports = async function spa({ output, cache, environment }) {

const folder = output || 'spa'

process.env.NULLSTACK_ENVIRONMENT_MODE = 'spa'

const dir = process.cwd()

const application = require(`${dir}/.${environment}/server`).default

const projectName = application.project.name || 'The Nullstack application'

const { existsSync, mkdirSync, writeFileSync, copySync, removeSync } = require('fs-extra')

const path = `${dir}/${folder}`

async function copy(url, file) {

console.info(` ⚙️ ${file || url}`)

const content = await application.server.prerender(url)

const target = `${dir}/${folder}${file || url}`

writeFileSync(target, content)

}

function filter(src, dest) {

return dest.endsWith(folder) || (src.includes('client') && !src.includes('.txt'))

}

console.info()

if (existsSync(path)) {

removeSync(path)

}

mkdirSync(path)

console.info(` ⚙️ /public/`)

copySync(`${dir}/public`, path)

await copy('/', '/index.html')

console.info(` ⚙️ /.${environment}/`)

copySync(`${dir}/.${environment}`, path, { filter })

await copy(`/manifest.webmanifest`)

await copy(`/service-worker.js`)

await copy('/robots.txt')

console.info()

console.info('\x1b[36m%s\x1b[0m', ` 🚀 ${projectName} is ready at ${folder}\n`)

if (cache) {

console.info('Storing cache...')

} else if (environment === 'production') {

process.exit()

}

}