package main

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

func main() {
	listen := flag.String("listen", "127.0.0.1:9090", "local proxy address (configure browser to use this)")
	phoneURL := flag.String("phone", "http://192.168.1.10:8771", "phone base URL (Component 1/2)")
	username := flag.String("user", "", "FIDO2 username (required)")
	gatedFile := flag.String("gated", "", "gated hosts file (default: ~/.config/component3/gated_hosts.txt)")
	verbose := flag.Bool("v", false, "verbose logging")
	flag.Parse()

	if *username == "" {
		fmt.Fprintln(os.Stderr, "error: -user is required")
		flag.Usage()
		os.Exit(1)
	}

	cfgDir := defaultConfigDir()
	if err := os.MkdirAll(cfgDir, 0700); err != nil {
		log.Fatalf("cannot create config dir: %v", err)
	}
	if *gatedFile == "" {
		*gatedFile = filepath.Join(cfgDir, "gated_hosts.txt")
	}

	gated := &GatedHosts{}
	if err := gated.Load(*gatedFile); err != nil {
		log.Printf("warning: gated hosts: %v (using empty list)", err)
	} else {
		log.Printf("loaded %d gated entries from %s", gated.Len(), *gatedFile)
	}

	phone := NewPhoneClient(*phoneURL, *username)

	proxy := &Proxy{
		phone:   phone,
		gated:   gated,
		verbose: *verbose,
	}

	log.Printf("listening on %s — configure browser HTTP proxy to this address", *listen)
	server := &http.Server{
		Addr:    *listen,
		Handler: proxy,
	}
	if err := server.ListenAndServe(); err != nil {
		log.Fatalf("proxy: %v", err)
	}
}

func defaultConfigDir() string {
	home, err := os.UserHomeDir()
	if err != nil {
		return ".component3"
	}
	return filepath.Join(home, ".config", "component3")
}