package email

import (
	"encoding/base64"
	"gopkg.in/gomail.v2"
	"path/filepath"
)

var Email = &email{}

type email struct {
	dialer *gomail.Dialer
	mail   string
}
type Attachment struct {
	Name string
	Path string
}

// InitEmail 初始化配置
func InitEmail(smtp string, port int, user, pass, mail string) *email {
	Email.dialer = gomail.NewDialer(smtp, port, user, pass)
	Email.mail = mail
	return Email
}

// Send @Title 发送邮件
func (e *email) Send(email, subject, body string, attachments []Attachment) error {
	message := gomail.NewMessage()
	message.SetHeader("From", e.mail)
	message.SetHeader("To", email)
	message.SetHeader("Subject", subject)
	message.SetBody("text/html", body)
	for _, attachment := range attachments {
		ext := filepath.Ext(attachment.Path)
		message.Attach(attachment.Path, gomail.Rename("=?utf-8?B?"+base64.StdEncoding.EncodeToString([]byte(attachment.Name+ext))+"?="))
	}
	if err := e.dialer.DialAndSend(message); err != nil {
		return err
	}
	return nil
}