package service

import (
	"spend-sparrow/log"
	"spend-sparrow/types"

	"fmt"
	"net/smtp"
)

type Mail interface {
	// Sending an email is a fire and forget operation. Thus no error handling
	SendMail(to string, subject string, message string)
}

type MailImpl struct {
	server *types.Settings
}

func NewMail(server *types.Settings) MailImpl {
	return MailImpl{server: server}
}

func (m MailImpl) SendMail(to string, subject string, message string) {
	go m.internalSendMail(to, subject, message)
}

func (m MailImpl) internalSendMail(to string, subject string, message string) {
	if m.server.Smtp == nil {
		return
	}

	s := m.server.Smtp

	auth := smtp.PlainAuth("", s.User, s.Pass, s.Host)

	msg := fmt.Sprintf("From: %v <%v>\nTo: %v\nSubject: %v\nMIME-version: 1.0;\nContent-Type: text/html; charset=\"UTF-8\";\n\n%v", s.FromName, s.FromMail, to, subject, message)

	log.Info("Sending mail to %v", to)
	err := smtp.SendMail(s.Host+":"+s.Port, auth, s.FromMail, []string{to}, []byte(msg))
	if err != nil {
		log.Error("Error sending mail: %v", err)
	}
}