package main

import (
	"flag"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"os"
	"strings"
	"text/template"

	"github.com/gorilla/mux"
)

var (
	port      *int     // port the http server listens on
	usernames []string // list of usernames
)

// Credentials stores user credentials
type Credentials struct {
	Username   string
	Accesscode string
	Hostname   string
}

func registerHTTPFlags() {
	port = flag.Int("port", 8081, "The port the http server should listen on")
}

func setupHTTPServer() http.Server {
	r := mux.NewRouter()

	r.HandleFunc("/", indexHandler)
	return http.Server{
		Addr:    fmt.Sprintf("0.0.0.0:%d", *port),
		Handler: r,
	}
}

// Host of the index file
func indexHandler(w http.ResponseWriter, r *http.Request) {
	t := template.New("")
	t, err := t.ParseFiles("./hosted/index.html")
	if err != nil {
		log.Println(err)
		return
	}

	content := Content{
		Hostname: os.Getenv("HOSTNAME"),
	}

	t.ExecuteTemplate(w, "index", content)
}

func readFileToReponse(w http.ResponseWriter, path string) {
	requestedFile := strings.Replace(path, "..", "", -1)

	contents, readError := ioutil.ReadFile(fmt.Sprintf("hosted/%s", requestedFile))

	if readError != nil {
		w.Write([]byte(fmt.Sprintf("unable to read %s", requestedFile)))
	} else {
		w.Write([]byte(contents))
	}
}