package api

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

// writeJSON writes v as 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)
	if v == nil {
		return
	}
	if err := json.NewEncoder(w).Encode(v); err != nil {
		log.Printf("writeJSON: %v", err)
	}
}

// errorBody is the standard error envelope.
type errorBody struct {
	Error string `json:"error"`
}

// writeError writes a JSON error response.
func writeError(w http.ResponseWriter, status int, msg string) {
	writeJSON(w, status, errorBody{Error: msg})
}