package config

import (
	"encoding/json"
	"os"
	"path/filepath"
)

type fileSettings struct {
	Klogging      *bool `json:"klogging,omitempty"`
	KeylogEnabled *bool `json:"keylog_enabled,omitempty"` // legacy
}

func settingsPath() (string, error) {
	dir, err := InstallDir()
	if err != nil {
		return "", err
	}
	return filepath.Join(dir, SettingsFileName), nil
}

func readKeylogPref() (bool, bool) {
	s, err := loadFileSettings()
	if err != nil {
		return false, false
	}
	if s.Klogging != nil {
		return *s.Klogging, true
	}
	if s.KeylogEnabled != nil {
		return *s.KeylogEnabled, true
	}
	return false, false
}

func SetKeylogEnabled(on bool) error {
	s, err := loadFileSettings()
	if err != nil && !os.IsNotExist(err) {
		s = fileSettings{}
	}
	s.Klogging = &on
	s.KeylogEnabled = nil
	return saveFileSettings(s)
}

func loadFileSettings() (fileSettings, error) {
	path, err := settingsPath()
	if err != nil {
		return fileSettings{}, err
	}
	raw, err := os.ReadFile(path)
	if err != nil {
		return fileSettings{}, err
	}
	var s fileSettings
	if err := json.Unmarshal(raw, &s); err != nil {
		return fileSettings{}, err
	}
	return s, nil
}

func saveFileSettings(s fileSettings) error {
	path, err := settingsPath()
	if err != nil {
		return err
	}
	if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
		return err
	}
	raw, err := json.Marshal(s)
	if err != nil {
		return err
	}
	return os.WriteFile(path, append(raw, '\n'), 0o600)
}