// Copyright 2021 The casbin Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// modified from https://github.com/casbin/casnode/blob/master/service/mail.go

package object

import (
	"strconv"

	"github.com/astaxie/beego"
	"github.com/go-gomail/gomail"
)

var dialer *gomail.Dialer

var mailConn = map[string]string{
	"user": beego.AppConfig.String("mailUser"),
	"pass": beego.AppConfig.String("mailPass"),
	"host": beego.AppConfig.String("mailHost"),
	"port": beego.AppConfig.String("mailPort"),
}

func InitDialer() {
	port, _ := strconv.Atoi(mailConn["port"])
	dialer = gomail.NewDialer(mailConn["host"], port, mailConn["user"], mailConn["pass"])
}

func SendEmail(title, content, dest, sender string) error {
	message := gomail.NewMessage()
	message.SetAddressHeader("From", beego.AppConfig.String("mailUser"), sender)
	message.SetHeader("To", dest)
	message.SetHeader("Subject", title)
	message.SetBody("text/html", content)
	if dialer == nil {
		InitDialer()
	}
	return dialer.DialAndSend(message)
}