package main

import (
	"log"
	"net"
	"net/http"
	"os"
	"time"
)

// ErrorPanic 错误检测
func ErrorPanic(err error) {
	if err != nil {
		log.Panic(err)
	}
}

// ErrorLog 错误检测
func ErrorLog(err error) bool {
	if err != nil {
		// log.Println(err)
		return true
	}
	return false
}

// Worker 维护所有系统正常的核心类
type Worker struct {
	LogFile *os.File

	DNET *DutiesNet
	DVPN *DutiesVPN
}

func checkTunExist() bool {
	ifaces, err := net.Interfaces()
	if err != nil {
		log.Println(err)
		return false
	}

	for _, i := range ifaces {
		if i.Name == "tun0" {
			return true
		}
	}
	return false
}

// CmdRestartHandler 接收到该命令就重启
func (worker *Worker) CmdRestartHandler(w http.ResponseWriter, r *http.Request) {
	worker.DNET.SetRestart()
	w.Write([]byte("ok"))
}

// CmdImOKHandler 可以ping通
func (worker *Worker) CmdImOKHandler(w http.ResponseWriter, r *http.Request) {
	w.Write([]byte("ok"))
}

func testSync(f *os.File) {
	for {
		time.Sleep(time.Second * 1)
		f.Sync()
	}
}

func main() {
	log.SetFlags(log.Lshortfile | log.LstdFlags)
	f, err := os.OpenFile("/root/pppoe_control.log", os.O_SYNC|os.O_APPEND|os.O_CREATE|os.O_RDWR, 0660)
	ErrorPanic(err)
	log.SetOutput(f)
	defer f.Close()
	go testSync(f)

	pw := &PingWorker{}

	dnet := &DutiesNet{}
	dnet.Default(pw)

	dvpn := &DutiesVPN{}
	dvpn.Default(pw)

	worker := Worker{f, dnet, dvpn}

	http.HandleFunc("/pppoe/restart", worker.CmdRestartHandler)
	http.HandleFunc("/pppoe/imok", worker.CmdImOKHandler)
	http.ListenAndServe(":8800", nil)
}