package platform

import (
	"os"
	"path/filepath"
)

// WriteUserFile writes data to path atomically (tmp + rename) with the
// given mode, creating any missing parent directories (mode 0755).
// Intended for user-owned destinations under $HOME — no sudo.
func WriteUserFile(path string, data []byte, mode os.FileMode) error {
	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
		return err
	}
	tmp := path + ".tmp"
	if err := os.WriteFile(tmp, data, mode); err != nil {
		os.Remove(tmp)
		return err
	}
	if err := os.Rename(tmp, path); err != nil {
		os.Remove(tmp)
		return err
	}
	return nil
}