package main

import (
	"flag"
	"fmt"
	"log"
	"math/rand"
	"net/http"
	"os"
	"time"

	"github.com/elazarl/go-bindata-assetfs"
	"github.com/gorilla/sessions"
	"github.com/prometheus/client_golang/prometheus"
)

//go:generate go-bindata -o static.go static/

const MAX = 12

var port = flag.Int("port", 8000, "listen on this port")

var store = sessions.NewCookieStore([]byte(os.Getenv("MMG_SECRET_KEY")))

func main() {
	rand.Seed(time.Now().UTC().UnixNano())
	flag.Parse()
	http.Handle("/metrics", prometheus.Handler())
	http.HandleFunc("/api/v0/addsub/problem/", addsub)
	http.HandleFunc("/api/v0/mul/problem/", mul)
	http.HandleFunc("/api/v0/attempt/", attempt)
	http.Handle(
		"/",
		http.FileServer(
			&assetfs.AssetFS{
				Asset:     Asset,
				AssetDir:  AssetDir,
				AssetInfo: AssetInfo,
				Prefix:    "static",
			},
		),
	)
	http.HandleFunc(
		"/reset/",
		reset,
	)

	hostname, err := os.Hostname()
	if err != nil {
		log.Fatal("problem getting hostname:", err)
	}
	log.Printf("serving at: http://%s:%d/", hostname, *port)

	if err := http.ListenAndServe(fmt.Sprintf(":%d", *port), nil); err != nil {
		log.Fatal("ListenAndServe:", err)
	}
}