package api

import (
	"encoding/json"
	"net/http"
)

// writeJSON writes a JSON response with the given status code.
func writeJSON(w http.ResponseWriter, status int, v any) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	json.NewEncoder(w).Encode(v)
}

// errorBody creates a standard error response body.
func errorBody(code, message string) map[string]string {
	return map[string]string{
		"error":   code,
		"message": message,
	}
}

// truncateStr truncates a string to the given length, appending "..." if truncated.
func truncateStr(s string, maxLen int) string {
	if len(s) <= maxLen {
		return s
	}
	if maxLen <= 3 {
		return s[:maxLen]
	}
	return s[:maxLen-3] + "..."
}