package gomailer

import (
	"crypto/tls"
	"fmt"

	"gopkg.in/gomail.v2"
)

// Mailer 邮件发送接口
type Mailer interface {
	SendMail(to []string, subject string, body string) error
}

// MailerImpl 邮件发送实现
type MailerImpl struct {
	message *gomail.Message
	dialer  *gomail.Dialer
}

// NewMailer 创建邮件发送实例
func NewMailer(host string, port int, username, password, nickname string) Mailer {
	m := gomail.NewMessage()
	m.SetHeader(`From`, m.FormatAddress(username, nickname))
	// 下面的配置改成你自己的邮箱配置
	d := gomail.NewDialer(host, port, username, password)
	// 修改TLSconfig
	d.TLSConfig = &tls.Config{InsecureSkipVerify: true}
	return &MailerImpl{
		message: m,
		dialer:  d,
	}
}

// SendMail 发送邮件
func (m *MailerImpl) SendMail(to []string, subject string, body string) error {
	m.message.SetHeader(`To`, to...)
	m.message.SetHeader(`Subject`, subject)
	m.message.SetBody(`text/html`, body)
	if err := m.dialer.DialAndSend(m.message); err != nil {
		return fmt.Errorf("send mail failed: %v", err)
	}
	return nil
}