package cron_task

import (
	"fmt"
	"gitee.ltd/lxh/logger/log"
	"strings"
	"time"
	"wireguard-dashboard/client"
	"wireguard-dashboard/repository"
	"wireguard-dashboard/utils"
)

// offlineMonitoring
// @description: 离线监听任务
func offlineMonitoring() {
	devices, err := client.WireguardClient.Devices()
	if err != nil {
		time.Sleep(5 * time.Minute) // 休眠五分钟再执行
		offlineMonitoring()
		return
	}

	// 遍历客户端数据，并渲染数据信息
	for _, d := range devices {
		for _, p := range d.Peers {
			var ipAllocation string
			for _, iaip := range p.AllowedIPs {
				ipAllocation += iaip.String() + ","
			}
			ipAllocation = strings.TrimRight(ipAllocation, ",")
			isOnline := time.Since(p.LastHandshakeTime).Minutes() < 3

			// 未离线
			if isOnline {
				continue
			}

			clientInfo, err := repository.Client().GetByPublicKey(p.PublicKey.String())
			if err != nil {
				continue
			}

			// 没有启用离线监听时，即使客户端已经离线则也不执行
			if clientInfo.OfflineMonitoring == nil || *clientInfo.OfflineMonitoring != 1 || clientInfo.Email == "" {
				continue
			}

			content := fmt.Sprintf("客户端：%s\r\n", clientInfo.Name)
			content += fmt.Sprintf("客户端IP：%s\r\n", ipAllocation)
			content += fmt.Sprintf("端点IP：%s\r\n", p.Endpoint.String())
			content += fmt.Sprintf("最后握手时间：%s\r\n", p.LastHandshakeTime.Format("2006-01-02 15:04:05"))

			// 离线并且配置了邮箱，准备发送邮件
			err = utils.Mail().SendMail(clientInfo.Email, fmt.Sprintf("客户端[%s]离线通知", clientInfo.Name), content, "")
			if err != nil {
				log.Errorf("发送离线通知邮件失败: %v", err.Error())
				continue
			}

		}
	}

}