package pwreset

import (
	"net/smtp"
)

//EmailSender is responsible for sending an email.
type EmailSender interface {
	Send(to []string, body []byte) error
	From() string
}

//NewEmailSender returns an smtp email sender.
func NewEmailSender(host, port, user, pass, sender string) EmailSender {
	return &emailSender{host, port, user, pass, sender, smtp.SendMail}
}

//nolint: staticcheck
type emailSender struct {
	host, port, user, pass, sender string
	send                           func(string, smtp.Auth, string, []string, []byte) error
}

//From returns the address of the sending account
func (e *emailSender) From() string {
	return e.sender
}

//Send sends the given body to given recipients using smtp.
func (e *emailSender) Send(to []string, body []byte) error {
	addr := e.host + ":" + e.port
	auth := smtp.PlainAuth("", e.user, e.pass, e.host)

	return e.send(addr, auth, e.sender, to, body)
}