import gmail from 'gmail-send'
import ses from 'node-ses'
import {stringify as nice} from 'yaml'

const create = { gmail:gmail,ses:ses }

class Email {
  constructor(opts) {
    this._pkg = {
      subject: opts.subject || 'notification',
      to: opts.to,
      label: opts.label
    }
    Object.assign(this._pkg,opts.credentials)
    this.smtp = opts.smtp || 'gmail'
    this._send = create[this.smtp](this._pkg)
  }
  async send (msg='', opts={}) {
    const pkg = Object.assign({},this._pkg,opts)
    if (typeof msg === 'string') { pkg.subject = this._pkg.subject || msg; pkg.text = msg }
    else {
      pkg.subject = msg.subject || this._pkg.subject || msg.msg || msg.message  
      pkg.text = msg.text || nice(msg)
      pkg.html = msg.html
      pkg.files = msg.files
    }
    if (!pkg.to) return {error:'no recipients'}
    try {
      let res =  await this._send(pkg)
      return res
    } catch (err) {
      return {error:err}
    }
  }

  setOpts (opts={}) {
    Object.assign(this.pkg,opts)
  }

}

export default Email
export { Email as Service }