package tls_test

import (
	gotls "crypto/tls"
	"crypto/x509"
	"testing"
	"time"

	"github.com/v2fly/v2ray-core/v5/common"
	"github.com/v2fly/v2ray-core/v5/common/protocol/tls/cert"
	. "github.com/v2fly/v2ray-core/v5/transport/internet/tls"
)

func TestCertificateIssuing(t *testing.T) {
	certificate := ParseCertificate(cert.MustGenerate(nil, cert.Authority(true), cert.KeyUsage(x509.KeyUsageCertSign)))
	certificate.Usage = Certificate_AUTHORITY_ISSUE

	c := &Config{
		Certificate: []*Certificate{
			certificate,
		},
	}

	tlsConfig := c.GetTLSConfig()
	v2rayCert, err := tlsConfig.GetCertificate(&gotls.ClientHelloInfo{
		ServerName: "www.v2fly.org",
	})
	common.Must(err)

	x509Cert, err := x509.ParseCertificate(v2rayCert.Certificate[0])
	common.Must(err)
	if !x509Cert.NotAfter.After(time.Now()) {
		t.Error("NotAfter: ", x509Cert.NotAfter)
	}
}

func TestExpiredCertificate(t *testing.T) {
	caCert := cert.MustGenerate(nil, cert.Authority(true), cert.KeyUsage(x509.KeyUsageCertSign))
	expiredCert := cert.MustGenerate(caCert, cert.NotAfter(time.Now().Add(time.Minute*-2)), cert.CommonName("www.v2fly.org"), cert.DNSNames("www.v2fly.org"))

	certificate := ParseCertificate(caCert)
	certificate.Usage = Certificate_AUTHORITY_ISSUE

	certificate2 := ParseCertificate(expiredCert)

	c := &Config{
		Certificate: []*Certificate{
			certificate,
			certificate2,
		},
	}

	tlsConfig := c.GetTLSConfig()
	v2rayCert, err := tlsConfig.GetCertificate(&gotls.ClientHelloInfo{
		ServerName: "www.v2fly.org",
	})
	common.Must(err)

	x509Cert, err := x509.ParseCertificate(v2rayCert.Certificate[0])
	common.Must(err)
	if !x509Cert.NotAfter.After(time.Now()) {
		t.Error("NotAfter: ", x509Cert.NotAfter)
	}
}

func TestInsecureCertificates(t *testing.T) {
	c := &Config{}

	tlsConfig := c.GetTLSConfig()
	if len(tlsConfig.CipherSuites) > 0 {
		t.Fatal("Unexpected tls cipher suites list: ", tlsConfig.CipherSuites)
	}
}

func BenchmarkCertificateIssuing(b *testing.B) {
	certificate := ParseCertificate(cert.MustGenerate(nil, cert.Authority(true), cert.KeyUsage(x509.KeyUsageCertSign)))
	certificate.Usage = Certificate_AUTHORITY_ISSUE

	c := &Config{
		Certificate: []*Certificate{
			certificate,
		},
	}

	tlsConfig := c.GetTLSConfig()
	lenCerts := len(tlsConfig.Certificates)

	b.ResetTimer()

	for i := 0; i < b.N; i++ {
		_, _ = tlsConfig.GetCertificate(&gotls.ClientHelloInfo{
			ServerName: "www.v2fly.org",
		})
		delete(tlsConfig.NameToCertificate, "www.v2fly.org")
		tlsConfig.Certificates = tlsConfig.Certificates[:lenCerts]
	}
}