// Copyright (C) 2025 Marius Schellenberger

package jwt

import (
	"bytes"
	"errors"
	"testing"
	"time"
)

var claims = Claims{
	"sub":   "1234567890",
	"name":  "John Doe",
	"admin": true,
	"fizz":  "buzz",
}

func TestValidate(t *testing.T) {
	jwt, err := New(
		WithExpiry(time.Second),
		WithBlacklist(NewMemBlacklist()),
	)
	if err != nil {
		t.Error(err)
	}
	token := NewToken(claims.Copy(), nil)
	err = jwt.Sign(token)
	if err != nil {
		t.Error(err)
	}
	_, err = DecodeToken("")
	if err == nil {
		t.Error(errors.New("token is empty"))
	}
	nt, err := DecodeToken(token.String())
	if err != nil {
		t.Error(err)
	}
	err = jwt.Verify(nt)
	if err != nil {
		t.Error(err)
	}
	time.Sleep(time.Second * 2)
	err = jwt.Verify(nt)
	if err == nil {
		t.Error(errors.New("token should be expired"))
	}

	err = jwt.Invalidate(nt)
	if err == nil {
		t.Error(errors.New("token is expired"))
	}

	nt.Claims.Delete(ExpClaim)
	err = jwt.Sign(nt)
	if err != nil {
		t.Error(err)
	}
	err = jwt.Verify(nt)
	if err != nil {
		t.Error(err)
	}

	err = jwt.Invalidate(nt)
	if err != nil {
		t.Error(err)
	}
	err = jwt.Invalidate(nt)
	if err == nil {
		t.Error(errors.New("double invalidate"))
	}

	err = jwt.Verify(nt)
	if err == nil {
		t.Error(errors.New("token should be blacklisted"))
	}
	err = jwt.Stop()
	if err != nil {
		t.Error(err)
	}
	// should not panic
	err = jwt.Stop()
	if err != nil {
		t.Error(err)
	}
}

func TestNonce(t *testing.T) {
	jwt, err := New(
		WithExpiry(time.Second),
		WithNonce(),
	)
	if err != nil {
		t.Error(err)
	}
	token := NewToken(claims.Copy(), nil)
	err = jwt.Sign(token)
	if err != nil {
		t.Error(err)
	}
	nt, err := DecodeToken(token.String())
	if err != nil {
		t.Error(err)
	}
	err = jwt.Verify(nt)
	if err != nil {
		t.Error(err)
	}
	nonce := nt.Claims.GetString(NonceClaim)
	if nonce == "" {
		t.Error(errors.New("nonce is empty"))
	}
}

func TestNoBlacklist(t *testing.T) {
	jwt, err := New(WithExpiry(time.Second))
	if err != nil {
		t.Error(err)
	}
	token := NewToken(claims.Copy(), nil)
	err = jwt.Sign(token)
	if err != nil {
		t.Error(err)
	}
	_, err = DecodeToken("")
	if err == nil {
		t.Error(errors.New("token is empty"))
	}
	nt, err := DecodeToken(token.String())
	if err != nil {
		t.Error(err)
	}
	err = jwt.Verify(nt)
	if err != nil {
		t.Error(err)
	}
	time.Sleep(time.Second * 2)
	err = jwt.Verify(nt)
	if err == nil {
		t.Error(errors.New("token should be expired"))
	}

	err = jwt.Invalidate(nt)
	if err == nil {
		t.Error(errors.New("blacklisting should be disabled"))
	}
}

func TestEmptySecretReader(t *testing.T) {
	_, err := New(
		WithExpiry(time.Second),
		WithSecret(new(bytes.Buffer)),
	)
	if err == nil {
		t.Error(errors.New("error should be secret reader error"))
	}
}

func TestInvalidSecretReader(t *testing.T) {
	_, err := New(
		WithExpiry(time.Second),
		WithSecret(bytes.NewBufferString("123")),
	)
	if err != ErrInvalidKeySize {
		t.Error(errors.New("error should be invalid key size"))
	}
}

func BenchmarkDecodeToken(b *testing.B) {
	jwt, _ := New()
	t := NewToken(claims.Copy(), nil)
	jwt.Sign(t)
	token := t.String()
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		DecodeToken(token)
	}
}

func BenchmarkNew(b *testing.B) {
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		New()
	}
}

func BenchmarkNewWithBlacklist(b *testing.B) {
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		New(WithBlacklist(NewMemBlacklist()))
	}
}

func BenchmarkSignHS256(b *testing.B) {
	jwt, _ := New()
	t := NewToken(claims.Copy(), nil)
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		jwt.Sign(t)
	}
}

func BenchmarkSignHS384(b *testing.B) {
	jwt, _ := New()
	t := NewToken(claims.Copy(), NewHash(HS384Name))
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		jwt.Sign(t)
	}
}

func BenchmarkSignHS512(b *testing.B) {
	jwt, _ := New()
	t := NewToken(claims.Copy(), NewHash(HS512Name))
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		jwt.Sign(t)
	}
}

func BenchmarkVerifyHS256(b *testing.B) {
	jwt, _ := New()
	t := NewToken(claims.Copy(), nil)
	jwt.Sign(t)
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		jwt.Verify(t)
	}
}

func BenchmarkVerifyHS384(b *testing.B) {
	jwt, _ := New()
	t := NewToken(claims.Copy(), NewHash(HS384Name))
	jwt.Sign(t)
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		jwt.Verify(t)
	}
}

func BenchmarkVerifyHS512(b *testing.B) {
	jwt, _ := New()
	t := NewToken(claims.Copy(), NewHash(HS512Name))
	jwt.Sign(t)
	b.ReportAllocs()
	for i := 0; i < b.N; i++ {
		jwt.Verify(t)
	}
}