package main

import (
	"flag"
	"log"
	"net/http"
	"path/filepath"
)

var tftpDir string

func main() {
	var studentsFile string

	var bind = flag.String("bind", ":8081", "Bind port/socket")
	flag.StringVar(&studentsFile, "students", "./students.csv", "Path to a CSV file containing students list")
	flag.StringVar(&ARPTable, "arp", ARPTable, "Path to ARP table")
	flag.StringVar(&tftpDir, "tftpdir", "/var/tftp/", "Path to TFTPd directory")
	flag.Parse()

	var err error

	// Sanitize options
	log.Println("Checking paths...")
	if tftpDir, err = filepath.Abs(tftpDir); err != nil {
		log.Fatal(err)
	}

	var students []Student
	students, err = readStudentsList(studentsFile)
	if err != nil {
		log.Fatal(err)
	}

	log.Println("Registering handlers...")
	mux := http.NewServeMux()
	mux.HandleFunc("/", Index)
	mux.Handle("/login", loginChecker{students})
	http.HandleFunc("/", mux.ServeHTTP)

	log.Println("Ready, listening on port", *bind)
	http.ListenAndServe(*bind, nil)
}