package config

import (
	"errors"
	"os"
	"os/user"
	"path/filepath"
)

// loads your applications config file from
// ~/.config/<appname>/config.text
func (pb *Config) Load() error {
	appname, err := GetAppname() // already configured by your application
	if err != nil {
		return err
	}

	configdir, err := getConfigDir()
	if err != nil {
		return err
	}

	filename := filepath.Join(configdir, appname+".text")
	_, err = SetFilename(pb, filename)
	if err != nil {
		return err
	}

	saveMu.Lock()
	defer saveMu.Unlock()
	err = loadTEXT(pb, filename)
	return err
}

func GetAppname() (string, error) {
	if APPNAME != "" {
		return APPNAME, nil
	}
	return "", errors.New("your application must setup config.Init()")
}

func GetUsername() string {
	if Get("username") != "" {
		return Get("username")
	}
	usr, _ := user.Current()
	if usr.Username != "" {
		return usr.Username
	}
	return "notsure" // OS Idiocracy
}

func getCacheDir() (string, error) {
	if Get("cacheDir") != "" {
		return Get("cacheDir"), nil
	}

	cacheDir, _ := os.UserCacheDir()

	appname, err := GetAppname() // application should have already configured this
	if err != nil {
		return cacheDir, err
	}

	return filepath.Join(cacheDir, appname), nil
}

func getConfigDir() (string, error) {
	if Get("configDir") != "" {
		return Get("configDir"), nil
	}

	configDir, _ := os.UserConfigDir()

	appname, err := GetAppname() // application should have already configured this
	if err != nil {
		return configDir, err
	}

	return filepath.Join(configDir, appname), nil
}