//
// Device server which handle communication to various devices (currently implements RUPTELA)
//

package main

import (
	"flag"
	"log"
	"runtime"
	"os"
	"io/ioutil"
	"strconv"
	"path/filepath"

	"github.com/ipsusila/opt"
	//"../../model"
	"../../server"
	"../../lumberjack"

	_ "github.com/lib/pq"
	_ "github.com/mattn/go-sqlite3"
)

var exPath = "";

func startServer(options *opt.Options) {
	//---options ---------------------------------------------------------
	//start server according to mode
	svcNet := &server.DevicePrsServerNet{
		Options: options,
	}
	svcNet.Start()
}

func main() {
	//maximum cpu
	runtime.GOMAXPROCS(runtime.NumCPU())

	ex, err := os.Executable()
  if err != nil {
      panic(err)
  }
  exPath = filepath.Dir(ex) + "/"
	confPath := exPath + "config.hjson"
	// re-open file
	file, err := os.Open(confPath)
	if err != nil {
		confPath = "config.hjson"
	}
	defer file.Close()

	//parse configurationf file
	cfgFile := flag.String("conf", confPath, "Configuration file")
	flag.Parse()

	//load options
	config, err := opt.FromFile(*cfgFile, opt.FormatAuto)
	if err != nil {
		log.Printf("Error while loading configuration file %v -> %v\n", *cfgFile, err)
		return
	}

	//display server ID (displayed in console)
	log.Printf("Server ID: %v\n", config.Get("server").GetString("id", "undefined (check configuration)"))

	//setup log
	//lw, err := utility.NewLogWriter(config)
	//if err != nil {
	//	log.Printf("Error while setup logging: %v\n", err)
	//	return
	//}
	log.SetFlags(log.Lshortfile | log.Ldate | log.Ltime)
	//log.SetOutput(lw)
	logName := config.Get("log").Get("file").GetString("name", "")
	log.SetOutput(&lumberjack.Logger{
	    Filename:   logName,
	    MaxSize:    10, // megabytes
	    MaxBackups: 3,
	    MaxAge:     3, //days
	    Compress:   true, // disabled by default
	})
	//defer lw.Close()

	pidFilePath := exPath + "receiver-" + config.Get("server").GetString("id", "undefined (check configuration)") + "-pid"
	errRemoveFile := os.Remove(pidFilePath)
	if errRemoveFile != nil {
	  log.Printf("PID file will be created")
	}
	pidStr := strconv.Itoa(os.Getpid())
	log.Printf("PID: %v\n", pidStr)
	d1 := []byte(pidStr)
  errCreateFile := ioutil.WriteFile(pidFilePath, d1, 0644)
	if errCreateFile != nil {
    log.Printf("Error while setup write PID file: %v\n", errCreateFile)
  } else{
		log.Printf("PID file created")
	}

	//Run application
	startServer(config)
}