package peer

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

func loadJSON(path string, target any) error {
	data, err := os.ReadFile(path)
	if err != nil {
		return err
	}
	return json.Unmarshal(data, target)
}

func storeJSON(path string, obj any) error {
	if err := os.MkdirAll(filepath.Dir(path), 0700); err != nil {
		return err
	}
	data, err := json.MarshalIndent(obj, "", "  ")
	if err != nil {
		return err
	}

	tmpPath := path + ".tmp"
	if err := os.WriteFile(tmpPath, data, 0600); err != nil {
		return err
	}

	if err := os.Rename(tmpPath, path); err != nil {
		os.Remove(tmpPath)
		return err
	}
	return nil
}