let querystring = require('querystring')
let stream_buffers = require('stream-buffers')
let XDate = require('xdate')

return async env => {
  let navbar = await _require('/navbar.jst')
  let contact_form = await _require('/contact_form.jst')

  await navbar(
    env,
    async _out => {},
    async _out => {
      h1 {'Contact NDCODE'}

      div(style="height: 15px;") {}

      if (env.request.method == 'POST') {
        let write_stream = new stream_buffers.WritableStreamBuffer()
        let data = new Promise(
          (resolve, reject) => {
            write_stream.
            on('finish', () => {resolve(write_stream.getContents())}).
            on('error', () => {reject()})
          }
        )
        env.request.pipe(write_stream)
        let query = querystring.parse((await data).toString())
        let full_email = `${query.first_name} ${query.last_name} <${query.email}>`
        console.log('received contact form:', full_email)

        // save the form contents in a dated logfile, so that we can
        // recover manually if the email doesn't send for some reason
        date = new XDate()
        query.date = date.toUTCString()

        await env.site.ensure_dir('/_logs')
        env.site.modify_json(
          `/_logs/contact_${date.toUTCString('yyyyMMdd')}.json`,
          [],
          async result => {result.value.push(query)}
        )

        // send email (asynchronously)
        ;(await env.site.get_emailjs('/_config/email_contact.json')).send(
          {
            text: query.message,
            from: 'Contact form <contact@ndcode.org>',
            'reply-to': full_email,
            to: 'Nick Downing <nick@ndcode.org>',
            subject:
              Object.prototype.hasOwnProperty.call(query, 'company') ?
              'Enquiry: ' + query.company :
              'Enquiry'
          },
          (err, message) => {
            if (err)
              console.error(err.stack || err.message)
            else
              console.log('sent contact email:', full_email)
          }
        )

        p {'Thanks! We\'ll be in touch as soon as we can.'}
      }
      else {
        p {'Do you require more information or consulting assistance with integrating the projects on this site? We\'d love to hear from you.'}

        await contact_form(env, _out)
      }
    }
  )
}