package gmail

import (
	"crypto/tls"
	"fmt"
	"log"
	"time"

	"gopkg.in/mail.v2"
)

type mailer struct {
	dialer *mail.Dialer
}

func NewMail(host, user, password string, port int, smtpSSL bool) *mailer {
	dialer := mail.NewDialer(host, port, user, password)
	dialer.TLSConfig = &tls.Config{InsecureSkipVerify: true}
	return &mailer{dialer: dialer}
}

func (m *mailer) log(content string) {
	nowTime := time.Now().Format("15:04:05")
	fmt.Printf("INFO [%s]: %s\n", nowTime, content)
}

func (m *mailer) SendMsgMail(title, msg string, receivers []string) {
	for _, receiver := range receivers {
		m.log(fmt.Sprintf("开始给 %s 发送邮件...", receiver))

		message := mail.NewMessage()
		message.SetHeader("From", m.dialer.Username)
		message.SetHeader("To", receiver)
		message.SetHeader("Subject", title)
		message.SetBody("text/plain", msg)

		if err := m.dialer.DialAndSend(message); err != nil {
			log.Printf("Error: 发送邮件失败! %v\n", err)
		} else {
			m.log("发送成功!")
		}
	}
}

func (m *mailer) SendFileMail(title, msg, filePath string, receivers []string) {
	for _, receiver := range receivers {
		m.log(fmt.Sprintf("开始给 %s 发送邮件...", receiver))

		message := mail.NewMessage()
		message.SetHeader("From", m.dialer.Username)
		message.SetHeader("To", receiver)
		message.SetHeader("Subject", title)
		message.SetBody("text/plain", msg)
		message.Attach(filePath)

		if err := m.dialer.DialAndSend(message); err != nil {
			log.Printf("Error: 发送邮件失败! %v\n", err)
		} else {
			m.log("发送成功!")
		}
	}
}

func main() {
	config := map[string]any{
		"host":     "smtp.1688.tech",
		"user":     "xxxx",
		"password": "yy",
		"port":     465,
		"smtp_ssl": true,
	}

	mail := NewMail(
		config["host"].(string),
		config["user"].(string),
		config["password"].(string),
		config["port"].(int),
		config["smtp_ssl"].(bool),
	)
	mail.SendMsgMail("test", "hello world", []string{"xx@126.com"})
}