package main

import (
	"os"
	"os/signal"
	"syscall"

	"github.com/golang/glog"
)

func listenSignal() {
	c := make(chan os.Signal, 1)
	var stop bool
	signal.Notify(c, syscall.SIGINT, syscall.SIGTERM, syscall.SIGUSR1)

	defer glog.Infof("listen signal stop, exit...")

	for sig := range c {
		glog.Infof("capture signal: %v", sig)
		switch sig {
		case syscall.SIGINT, syscall.SIGTERM:
			StopBoxesBeat()
			close(configChannel)
			stop = true
		case syscall.SIGUSR1:
			// `kill -USR1 pid`也会触发重新加载
			config, err := parseConfig(options.config)
			if err != nil {
				glog.Errorf("could not parse config:%s", err)
				continue
			}
			glog.Infof("config:\n%s", removeSensitiveInfo(config))
			configChannel <- config
		}

		if stop {
			break
		}
	}
}