// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
//go:build plus

package tasks

import (
	"fmt"
	teaconst "github.com/TeaOSLab/EdgeAPI/internal/const"
	"github.com/TeaOSLab/EdgeAPI/internal/db/models"
	"github.com/TeaOSLab/EdgeAPI/internal/goman"
	"github.com/TeaOSLab/EdgeAPI/internal/remotelogs"
	"github.com/TeaOSLab/EdgeAPI/internal/senders/mediasenders"
	"github.com/iwind/TeaGo/Tea"
	"github.com/iwind/TeaGo/dbs"
	"github.com/iwind/TeaGo/logs"
	"github.com/iwind/TeaGo/types"
	"net/mail"
	"strings"
	"time"
)

func init() {
	dbs.OnReadyDone(func() {
		goman.New(func() {
			NewUserEmailNotificationTask(30 * time.Second).Start()
		})
	})
}

type UserEmailNotificationTask struct {
	BaseTask

	duration time.Duration
}

func NewUserEmailNotificationTask(duration time.Duration) *UserEmailNotificationTask {
	return &UserEmailNotificationTask{
		duration: duration,
	}
}

func (this *UserEmailNotificationTask) Start() {
	var ticker = time.NewTicker(this.duration)
	for range ticker.C {
		err := this.Loop()
		if err != nil {
			remotelogs.Error("UserEmailNotificationTask", err.Error())
		}
	}
}

func (this *UserEmailNotificationTask) Loop() error {
	if !this.IsPrimaryNode() {
		return nil
	}

	var tx *dbs.Tx

	// 删除过期的通知
	err := models.SharedUserEmailNotificationDAO.DeleteExpiredNotifications(tx, 2)
	if err != nil {
		return err
	}

	// 通知邮件设置
	senderConfig, err := models.SharedSysSettingDAO.ReadUserSenderConfig(tx)
	if err != nil {
		return err
	}
	var notifyEmail = senderConfig.NotifyEmail
	if notifyEmail == nil {
		return nil
	}
	if !notifyEmail.IsOn {
		return nil
	}

	// 准备邮件中的参数
	productName, err := models.SharedSysSettingDAO.ReadProductName(tx)
	if err != nil {
		return err
	}
	if len(productName) == 0 {
		productName = teaconst.ProductNameZH
	}

	userNodeAddr, err := models.SharedUserNodeDAO.FindUserNodeAccessAddr(tx)
	if err != nil {
		return err
	}

	// 查询待发送
	notifications, err := models.SharedUserEmailNotificationDAO.ListSendingNotifications(tx, 100)
	if err != nil {
		return err
	}
	if len(notifications) == 0 {
		return nil
	}

	var mailInfos = []*mediasenders.MailInfo{}
	var notificationIds = []int64{}
	for _, notification := range notifications {
		_, err = mail.ParseAddress(notification.Email)
		if err != nil {
			// 直接删除
			err = models.SharedUserEmailNotificationDAO.DeleteNotification(tx, int64(notification.Id))
			if err != nil {
				return err
			}
			continue
		}

		// 标题和内容
		var subject = strings.ReplaceAll(notification.Subject, "${product.name}", productName)

		var body = notification.Body
		body = strings.ReplaceAll(body, "${product.name}", productName)
		body = strings.ReplaceAll(body, "${url.home}", userNodeAddr)

		mailInfos = append(mailInfos, &mediasenders.MailInfo{
			To:      notification.Email,
			Subject: subject,
			Body:    body,
		})

		if Tea.IsTesting() {
			logs.Println("sending notification mail to :", notification.Email)
		}

		notificationIds = append(notificationIds, int64(notification.Id))
	}
	if len(mailInfos) == 0 {
		return nil
	}

	// 发送
	var mailSender = mediasenders.NewEmailMedia()
	mailSender.Protocol = notifyEmail.Protocol
	mailSender.SMTP = notifyEmail.SMTPHost + ":" + types.String(notifyEmail.SMTPPort)
	mailSender.Username = notifyEmail.Username
	mailSender.Password = notifyEmail.Password
	mailSender.From = notifyEmail.FromEmail
	mailSender.FromName = notifyEmail.FromName
	err = mailSender.SendMails(mailInfos, productName)
	if err != nil {
		return fmt.Errorf("send notification mail failed: %w", err)
	}

	// 设置为已发送
	for _, notificationId := range notificationIds {
		err = models.SharedUserEmailNotificationDAO.DeleteNotification(tx, notificationId)
		if err != nil {
			return err
		}
	}

	return nil
}