package apierrors

import (
	"encoding/json"
	"errors"
	"io"
)

// ExportCatalog writes normalized, public-only error metadata. Invoke this
// explicitly from project tooling, using the same Catalog function registered
// at runtime. The API CLI reads the artifact; it never executes project code.
func ExportCatalog(w io.Writer, c Catalog) error {
	if w == nil {
		return errors.New("errors: catalog export writer required")
	}
	registry, err := NewRegistry(c)
	if err != nil {
		return err
	}
	encoder := json.NewEncoder(w)
	encoder.SetIndent("", "  ")
	return encoder.Encode(registry.Catalog())
}