package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"io/ioutil"
	"net/http"
	"os"

	"code.ivysaur.me/yatwiki3"
)

func main() {

	bindAddr := flag.String("listen", "127.0.0.1:80", "Bind address")
	configPath := flag.String("config", "config.json", "Configuration file")
	flag.Parse()

	opts := yatwiki3.ServerOptions{}

	cfg, err := ioutil.ReadFile(*configPath)

	if err != nil {
		if os.IsNotExist(err) {
			opts = *yatwiki3.DefaultOptions()
			if cfg, err := json.MarshalIndent(opts, "", "\t"); err == nil {
				err := ioutil.WriteFile(*configPath, cfg, 0644)
				if err != nil {
					fmt.Fprintf(os.Stderr, "Failed to save default configuration file: %s", err.Error())
				}
			}
		} else {
			fmt.Fprintf(os.Stderr, "Failed to load configuration file '%s': %s\n", *configPath, err.Error())
			os.Exit(1)
		}
	} else {
		fmt.Printf("Loading configuration from '%s'...\n", *configPath)
		err = json.Unmarshal(cfg, &opts)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Failed to parse configuration file: %s\n", err.Error())
			os.Exit(1)
		}
	}

	ws, err := yatwiki3.NewWikiServer(&opts)
	if err != nil {
		fmt.Fprintln(os.Stderr, err.Error())
		os.Exit(1)
	}
	defer ws.Close()

	fmt.Printf("YATWiki now listening on %s\n", *bindAddr)
	err = http.ListenAndServe(*bindAddr, ws)
	if err != nil {
		fmt.Fprintln(os.Stderr, err.Error())
		os.Exit(1)
	}

	os.Exit(0)
}