package certs_test

import (
	"crypto/x509"
	"encoding/pem"
	"testing"

	"git.t-juice.club/torjus/ezshare/certs"
	"git.t-juice.club/torjus/ezshare/store"
	"github.com/google/uuid"
)

func TestCertService(t *testing.T) {
	t.Run("TestManualVerifyClientCertificate", func(t *testing.T) {

		s := store.NewMemoryStore()

		caKeyBytes, caCertBytes, err := certs.GenCACert()
		if err != nil {
			t.Fatalf("Error generating ca cert: %s", err)
		}

		svc, err := certs.NewCertService(s, caCertBytes, caKeyBytes)
		if err != nil {
			t.Fatalf("Unable to create service: %s", err)
		}

		clientCertPEM, _, err := svc.NewClient("test")
		if err != nil {
			t.Fatalf("Unable to create client certificate: %s", err)
		}

		caCert, err := x509.ParseCertificate(caCertBytes)
		if err != nil {
			t.Fatalf("Unable to parse CA certificate: %s", err)
		}
		certPool := x509.NewCertPool()
		certPool.AddCert(caCert)

		clientCertPEMBlock, _ := pem.Decode(clientCertPEM)
		if clientCertPEMBlock == nil {
			t.Fatalf("Client does not contain PEM-encoded data")
		}
		if clientCertPEMBlock.Type != "CERTIFICATE" {
			t.Fatal("Client cert is not certificate")
		}

		clientCert, err := x509.ParseCertificate(clientCertPEMBlock.Bytes)
		if err != nil {
			t.Fatalf("Could not parse client certificate: %s", err)
		}

		if _, err := clientCert.Verify(x509.VerifyOptions{Roots: certPool}); err != nil {
			t.Fatalf("Could not verify client certificate: %s", err)
		}
	})
	t.Run("TestVerifyClientCertificate", func(t *testing.T) {

		s := store.NewMemoryStore()

		caKeyBytes, caCertBytes, err := certs.GenCACert()
		if err != nil {
			t.Fatalf("Error generating ca cert: %s", err)
		}

		svc, err := certs.NewCertService(s, caCertBytes, caKeyBytes)
		if err != nil {
			t.Fatalf("Unable to create service: %s", err)
		}

		clientID := uuid.Must(uuid.NewRandom()).String()
		clientCertPEM, _, err := svc.NewClient(clientID)
		if err != nil {
			t.Fatalf("Unable to create client certificate: %s", err)
		}

		id, err := svc.VerifyClient(clientCertPEM)
		if err != nil {
			t.Fatalf("Failed to verify certificate: %s", err)
		}
		if id != clientID {
			t.Fatalf("Verify returned wrong id. Got %s want %s", id, clientID)
		}
	})
}