package main

import (
  "github.com/fsnotify/fsnotify"
  "flag"
  "log"
  "os"
  "encoding/json"
)

type Cert struct {
  PrivateKey string
  PublicKey string
  Owner string
}

type Config struct {
  Source Cert
  Target Cert
  Reload string
}

func LoadConfig(path string) Config {
  var config Config

  config_data, err := os.ReadFile(path)
  if err != nil {
    log.Fatal("invalid config path %s: %v", path, err)
  }

  err = json.Unmarshal(config_data, &config)
  if err != nil {
    log.Fatal(err, "json format error")
  }

  return config
}

func ParseOpts() Config {
  var config_file string

  flag.StringVar(&config_file, "config", "cert-bouncer.json", ".json config to use.")
  flag.Parse()

  return LoadConfig(config_file)
}

func main() {
  config := ParseOpts()

  watcher, err := fsnotify.NewWatcher()
  if err != nil {
    log.Fatal(err, "Can't watch files.")
  }

  err = watcher.Add(config.Source.PrivateKey)
  if err != nil {
    log.Fatalf("can't watch %s: %v", err, config.Source.PrivateKey)
  }
}