package llm

import (
	"encoding/json"
)

// parseArguments decodes a tool-call arguments JSON string into a map. An
// empty or malformed string yields an empty map rather than an error, so a
// misbehaving model never crashes the loop — the executor will simply receive
// no arguments and the audit log will show what the model actually produced.
func parseArguments(raw string) (map[string]any, error) {
	if raw == "" {
		return map[string]any{}, nil
	}
	var out map[string]any
	if err := json.Unmarshal([]byte(raw), &out); err != nil {
		return map[string]any{}, err
	}
	if out == nil {
		out = map[string]any{}
	}
	return out, nil
}

// marshalArguments serialises a map back to a JSON string for the assistant
// echo message. A nil map yields "{}".
func marshalArguments(args map[string]any) string {
	if args == nil {
		return "{}"
	}
	b, err := json.Marshal(args)
	if err != nil {
		return "{}"
	}
	return string(b)
}