package server

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

// WriteJSON encodes v as JSON and writes it to w with the given status code.
// It sets Content-Type to application/json.
func WriteJSON(w http.ResponseWriter, status int, v any) error {
	b, err := json.Marshal(v)
	if err != nil {
		return err
	}
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(status)
	_, err = w.Write(b)
	return err
}

// WriteError writes a JSON error response with the given status code and
// message. The response body is {"error": "<message>"}.
func WriteError(w http.ResponseWriter, status int, msg string) error {
	return WriteJSON(w, status, errorBody{Error: msg})
}

type errorBody struct {
	Error string `json:"error"`
}