package main

import (
	"fmt"
	"io"
	"log"
	"os"
	"sync"
)

func main() {
	if len(os.Args) < 2 {
		fmt.Fprintf(os.Stderr, "%s <configfile>\n", os.Args[0])
		os.Exit(1)
	}

	var configfile io.ReadCloser
	if os.Args[1] == "-" {
		configfile = os.Stdin
	} else {
		var err error
		configfile, err = os.Open(os.Args[1])
		if err != nil {
			log.Fatal(err)
		}
	}

	config, err := Parse(configfile)
	if err != nil {
		log.Fatal(err)
	}

	_, _, _, errlog := Loggers(config)

	servers, err := buildServers(config)
	if err != nil {
		_ = errlog.Log("msg", "error building servers", "err", err)
		os.Exit(1)
	}

	if err := privdrop(config); err != nil {
		_ = errlog.Log("msg", "failed to drop privileges", "err", err)
		os.Exit(1)
	}

	wg := &sync.WaitGroup{}
	wg.Add(len(servers))
	for i := range servers {
		server := servers[i]
		go func() {
			defer wg.Done()
			_ = server.Serve()
		}()
	}

	wg.Wait()
}