package app

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

func loadSingBoxProfilesState() singBoxProfilesState {
	st := singBoxProfilesState{
		Version:  singBoxProfilesStateVersion,
		Revision: 0,
	}
	data, err := os.ReadFile(singBoxProfilesStatePath)
	if err != nil {
		return st
	}
	if err := json.Unmarshal(data, &st); err != nil {
		return singBoxProfilesState{Version: singBoxProfilesStateVersion, Revision: 0}
	}
	return normalizeSingBoxProfilesState(st)
}

func saveSingBoxProfilesState(st singBoxProfilesState) error {
	st = normalizeSingBoxProfilesState(st)
	st.Version = singBoxProfilesStateVersion
	st.UpdatedAt = time.Now().UTC().Format(time.RFC3339)

	data, err := json.MarshalIndent(st, "", "  ")
	if err != nil {
		return err
	}
	if err := os.MkdirAll(filepath.Dir(singBoxProfilesStatePath), 0o755); err != nil {
		return err
	}
	tmp := singBoxProfilesStatePath + ".tmp"
	if err := os.WriteFile(tmp, data, 0o644); err != nil {
		return err
	}
	return os.Rename(tmp, singBoxProfilesStatePath)
}