// Copyright 2014 by Sascha L. Teichmann
// Use of this source code is governed by the MIT license
// that can be found in the LICENSE file.

package main

import (
	"flag"
	"fmt"
	"log"
	"net/http"

	"github.com/gorilla/mux"
)

func main() {
	var (
		port   int
		host   string
		webDir string
		mapDir string
	)
	flag.IntVar(&port, "port", 8808, "port of the web server")
	flag.IntVar(&port, "p", 8808, "port of the web server (shorthand)")
	flag.StringVar(&host, "host", "localhost", "address to bind")
	flag.StringVar(&host, "h", "localhost", "address to bind (shorthand)")
	flag.StringVar(&webDir, "web", "web", "static served web files.")
	flag.StringVar(&webDir, "w", "web", "static served web files (shorthand)")
	flag.StringVar(&mapDir, "map", "map", "directory of prerendered tiles")
	flag.StringVar(&mapDir, "m", "map", "directory of prerendered tiles (shorthand)")

	flag.Parse()

	r := mux.NewRouter()
	r.HandleFunc("/map/{z:[0-9]+}/{x:[0-9]+}/{y:[0-9]+}.png",
		func(rw http.ResponseWriter, r *http.Request) {
			createTiles(rw, r, mapDir)
		})

	r.PathPrefix("/").Handler(http.FileServer(http.Dir(webDir)))
	http.Handle("/", r)
	addr := fmt.Sprintf("%s:%d", host, port)
	if err := http.ListenAndServe(addr, nil); err != nil {
		log.Fatalf("Starting server failed: %s\n", err)
	}
}