package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"os"
	"path/filepath"
)

func readConfig(path string) (map[string]string, error) {
	var config map[string]string

	if cnt_raw, err := ioutil.ReadFile(path); err != nil {
		return nil, err
	} else if err := json.Unmarshal(cnt_raw, &config); err != nil {
		return nil, err
	} else {
		return config, nil
	}
}

func main() {
	var port = flag.Int("port", 8080, "Listening port")
	var sitedir = flag.String("sitedir", "./contents/", "Directory containing site content and pictures")
	flag.Parse()

	log.Println("Reading site configuration...")
	if config, err := readConfig(filepath.Join(*sitedir, "config.json")); err != nil {
		log.Fatal(err)
		os.Exit(1)
	} else {
		log.Println("Registering handlers...")
		mux := http.NewServeMux()
		mux.Handle("/favicon.ico", http.FileServer(http.Dir("./static/")))
		mux.Handle("/static/", http.FileServer(http.Dir("./")))
		mux.Handle("/doc/", http.FileServer(http.Dir("./")))
		mux.Handle("/images/", http.StripPrefix("/images/", http.FileServer(http.Dir(filepath.Join(*sitedir, "current")))))
		mux.HandleFunc("/api/", ApiRouting)
		mux.HandleFunc("/", SeeRouting)
		http.HandleFunc("/", mux.ServeHTTP)

		log.Println(fmt.Sprintf("Site ready (n=%s), listening on port %d", config["name"], *port))
		http.ListenAndServe(fmt.Sprintf(":%d", *port), nil)
	}
}