package config

import (
	"os"
	"path/filepath"
	"sync"
)

// an experiment to see if this is useful
var saveMu sync.RWMutex

// returns true if config is working okay
func InitValid() bool {
	saveMu.Lock()
	defer saveMu.Unlock()
	if configPB == nil {
		// todo: try to re-init it here
		return false
	}
	return true
}

// saves your applications config file
func Save() error {
	saveMu.Lock()
	defer saveMu.Unlock()
	basedir, _ := filepath.Split(configPB.Filename)
	if err := os.MkdirAll(basedir, os.ModePerm); err != nil {
		return err
	}
	err := SavePB(configPB)
	return err
}

func Get(flag string) string {
	saveMu.Lock()
	defer saveMu.Unlock()
	if configPB == nil {
		return ""
	}
	found := configPB.FindByKey(flag)
	if found == nil {
		return ""
	}
	return found.Value
}

func GetPanic(flag string) string {
	saveMu.Lock()
	defer saveMu.Unlock()
	if configPB == nil {
		configPanic(flag)
	}
	found := configPB.FindByKey(flag)
	if found == nil {
		configPanic(flag)
	}
	return found.Value
}

func configPanic(varname string) {
	saveMu.Lock()
	defer saveMu.Unlock()
	if configPB == nil {
		panic("config file is nil")
	}
	panic("config name '" + varname + "' not found")
}

func Set(key string, newValue string) error {
	saveMu.Lock()
	defer saveMu.Unlock()
	if configPB == nil {
		return NotInitialized
	}
	found := configPB.FindByKey(key)
	if found != nil {
		found.Value = newValue
	}

	newvar := new(Config)
	newvar.Key = key
	newvar.Value = newValue
	configPB.Append(newvar)
	return nil
}