package setting

import (
	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/lang"
	"golang.org/x/text/language"
)

type SettingContract interface {
	GetLanguages() []Lang
	GetCurrentLangOrDefaultLang() (currentLang Lang, isDefault bool)
	SetLang(language Lang) error

	GetDirectoryForSaving() string
	SetDirectoryForSaving(path string)

	GetFFmpegPath() string
	SetFFmpegPath(path string)

	GetFFprobePath() string
	SetFFprobePath(path string)

	GetFFplayPath() string
	SetFFplayPath(path string)
}

type setting struct {
	fyneApp fyne.App
}

func NewSetting(fyneApp fyne.App) SettingContract {
	return &setting{
		fyneApp: fyneApp,
	}
}

func (s *setting) GetLanguages() []Lang {
	items := []Lang{}
	for _, item := range supportedLanguages {
		items = append(items, item)
	}
	return items
}

func (s *setting) GetCurrentLangOrDefaultLang() (currentLang Lang, isDefault bool) {
	languageCode := s.fyneApp.Preferences().String("language")

	if languageCode == "" {
		languageTag, err := language.Parse(lang.SystemLocale().LanguageString())
		if err != nil {
			return currentLang, true
		}
		base, _ := languageTag.Base()
		languageCode = base.String()
	}

	if currentLang, ok := supportedLanguages[languageCode]; ok {
		return currentLang, false
	}

	return defaultLang(), true
}

func (s *setting) SetLang(language Lang) error {
	err := ChangeLang(language)
	if err != nil {
		return err
	}
	s.fyneApp.Preferences().SetString("language", language.Code)
	return nil
}

func (s *setting) GetDirectoryForSaving() string {
	return s.fyneApp.Preferences().String("directoryForSaving")
}

func (s *setting) SetDirectoryForSaving(path string) {
	s.fyneApp.Preferences().SetString("directoryForSaving", path)
}