package app

import (
	"net/http"

	"github.com/go-chi/render"
)

// WriteError writes an error message to w.
// If one or more messages are passed, a JSON response is also sent,
// with the first message becoming `error` and the second becoming `error_description`.
func (a *App) WriteError(w http.ResponseWriter, r *http.Request, status int, messages ...string) {
	render.Status(r, status)

	switch len(messages) {
	case 0:
		return
	case 1:
		render.JSON(w, r, errorMessage{
			Error: messages[0],
		})
	default:
		render.JSON(w, r, errorMessage{
			Error:            messages[0],
			ErrorDescription: messages[1],
		})
	}
}

type errorMessage struct {
	Error            string `json:"error"`
	ErrorDescription string `json:"error_description,omitempty"`
}