package main

import (
	"flag"
	"log"
	"net/http"
	"os"
	"path/filepath"

	"chfs-ng/internal/api"
	"chfs-ng/internal/auth"
	"chfs-ng/internal/config"
	"chfs-ng/internal/storage"
)

func main() {
	file := flag.String("file", "", "configuration file")
	pathFlag := flag.String("path", "/data", "shared path")
	port := flag.Int("port", 80, "listen port")
	flag.Parse()
	cfg := config.Default()
	if *file != "" {
		var err error
		cfg, err = config.Load(*file)
		if err != nil && !os.IsNotExist(err) {
			log.Fatal(err)
		}
	}
	if *pathFlag != "/data" || *file == "" {
		if *file == "" {
			cfg.Path = []string{*pathFlag}
			cfg.Port = *port
		}
	}
	root := cfg.Path[0]
	if e := os.MkdirAll(root, 0755); e != nil {
		log.Fatal(e)
	}
	mgr, _ := auth.ParseRules(cfg.Rules)
	srv := &api.Server{Store: storage.Local{Root: root}, Auth: mgr, Sessions: map[string]*auth.Account{}}
	addr := ":" + itoa(cfg.Port)
	if cfg.Port == 0 {
		addr = ":" + itoa(*port)
	}
	log.Printf("chfs-ng listening on %s root=%s", addr, filepath.Clean(root))
	if cfg.SSLCert != "" && cfg.SSLKey != "" {
		log.Fatal(http.ListenAndServeTLS(addr, cfg.SSLCert, cfg.SSLKey, srv.Handler()))
	}
	log.Fatal(http.ListenAndServe(addr, srv.Handler()))
}
func itoa(n int) string {
	const d = "0123456789"
	if n == 0 {
		return "0"
	}
	b := make([]byte, 0, 6)
	for n > 0 {
		b = append([]byte{d[n%10]}, b...)
		n /= 10
	}
	return string(b)
}