package config

import (
  "github.com/mitchellh/go-homedir"
  "log"
  "os"
  "encoding/json"
  "io/ioutil"
)

// Config for the application
var Config struct {
	WebHookURL  string
	Path        string
	Watch       int
	Username    string
	NoWatermark bool
	Exclude     string
}

const CurrentVersion string = "0.7"

// Load the current config or initialise with defaults
func LoadOrInit() {
  configPath := configPath()
  log.Printf("Trying to load from %s\n", configPath)
  _, err := os.Stat(configPath)
  if os.IsNotExist(err) {
    log.Printf("NOTE: No config file, writing out sample configuration")
    log.Printf("You need to set the configuration via the web interface")

    Config.WebHookURL = ""
    Config.Path = homeDir() + string(os.PathSeparator) + "screenshots"
    Config.Watch = 10
    SaveConfig()
  } else {
     LoadConfig()
  }
}

func LoadConfig() {
  path := configPath()
  data, err := ioutil.ReadFile(path)
  if err != nil {
    log.Fatalf("cannot read config file %s: %s", path, err.Error())
  }
  err = json.Unmarshal([]byte(data), &Config)
  if err != nil {
    log.Fatalf("cannot decode config file %s: %s", path, err.Error())
  }
}

func SaveConfig() {
  log.Print("saving configuration")
  path := configPath()
  jsonString, _ := json.Marshal(Config)
  err := ioutil.WriteFile(path, jsonString, os.ModePerm)
  if (err != nil) {
    log.Fatalf("Cannot save config %s: %s", path, err.Error())
  }
}

func homeDir() string {
  dir, err := homedir.Dir()
  if (err != nil) { panic (err) }
  return dir;
}

func configPath() string {
  homeDir := homeDir()
  return homeDir + string(os.PathSeparator) + ".dau.json"
}