package utils

import (
	"context"
	"log"

	firebase "firebase.google.com/go"
	"firebase.google.com/go/auth"
	"google.golang.org/api/option"
)

var app *firebase.App

func VerifyToken(token string) (*auth.Token, error) {
	if app == nil {
		setup()
	}

	client, err := app.Auth(context.Background())
	if err != nil {
		log.Fatalf("error getting Auth client: %v\n", err)
	}
	return client.VerifyIDToken(context.Background(), token)
}

func setup() {
	opt := option.WithCredentialsFile("./secrets/me-fit-a9365-firebase-adminsdk-8065w-7cf8443902.json")

	firebaseApp, err := firebase.NewApp(context.Background(), nil, opt)

	if err != nil {
		log.Fatalf("error initializing app: %v", err)
	}

	app = firebaseApp
}