package signer

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

	"testing"

	assert "github.com/stretchr/testify/require"
)

type ConstantReader struct {
}

func (c *ConstantReader) Read(p []byte) (int, error) {
	return 1, nil
}

func TestSigner_SignTextures(t *testing.T) {
	randomReader = &ConstantReader{}

	t.Run("sign textures", func(t *testing.T) {
		rawKey, _ := pem.Decode([]byte("-----BEGIN RSA PRIVATE KEY-----\nMIIBOwIBAAJBANbUpVCZkMKpfvYZ08W3lumdAaYxLBnmUDlzHBQH3DpYef5WCO32\nTDU6feIJ58A0lAywgtZ4wwi2dGHOz/1hAvcCAwEAAQJAItaxSHTe6PKbyEU/9pxj\nONdhYRYwVLLo56gnMYhkyoEqaaMsfov8hhoepkYZBMvZFB2bDOsQ2SaJ+E2eiBO4\nAQIhAPssS0+BR9w0bOdmjGqmdE9NrN5UJQcOW13s29+6QzUBAiEA2vWOepA5Apiu\npEA3pwoGdkVCrNSnnKjDQzDXBnpd3/cCIEFNd9sY4qUG4FWdXN6RnmXL7Sj0uZfH\nDMwzu8rEM5sBAiEAhvdoDNqLmbMdq3c+FsPSOeL1d21Zp/JK8kbPtFmHNf8CIQDV\n6FSZDwvWfuxaM7BsycQONkjDBTPNu+lqctJBGnBv3A==\n-----END RSA PRIVATE KEY-----\n"))
		key, _ := x509.ParsePKCS1PrivateKey(rawKey.Bytes)

		signer := &Signer{key}

		signature, err := signer.SignTextures("eyJ0aW1lc3RhbXAiOjE2MTQzMDcxMzQsInByb2ZpbGVJZCI6ImZmYzhmZGM5NTgyNDUwOWU4YTU3Yzk5Yjk0MGZiOTk2IiwicHJvZmlsZU5hbWUiOiJFcmlja1NrcmF1Y2giLCJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly9lbHkuYnkvc3RvcmFnZS9za2lucy82OWM2NzQwZDI5OTNlNWQ2ZjZhN2ZjOTI0MjBlZmMyOS5wbmcifX0sImVseSI6dHJ1ZX0")
		assert.NoError(t, err)
		assert.Equal(t, "IyHCxTP5ITquEXTHcwCtLd08jWWy16JwlQeWg8naxhoAVQecHGRdzHRscuxtdq/446kmeox7h4EfRN2A2ZLL+A==", signature)
	})

	t.Run("empty key", func(t *testing.T) {
		signer := &Signer{}

		signature, err := signer.SignTextures("hello world")
		assert.Error(t, err, "Key is empty")
		assert.Empty(t, signature)
	})
}

func TestSigner_GetPublicKey(t *testing.T) {
	randomReader = &ConstantReader{}

	t.Run("get public key", func(t *testing.T) {
		rawKey, _ := pem.Decode([]byte("-----BEGIN RSA PRIVATE KEY-----\nMIIBOwIBAAJBANbUpVCZkMKpfvYZ08W3lumdAaYxLBnmUDlzHBQH3DpYef5WCO32\nTDU6feIJ58A0lAywgtZ4wwi2dGHOz/1hAvcCAwEAAQJAItaxSHTe6PKbyEU/9pxj\nONdhYRYwVLLo56gnMYhkyoEqaaMsfov8hhoepkYZBMvZFB2bDOsQ2SaJ+E2eiBO4\nAQIhAPssS0+BR9w0bOdmjGqmdE9NrN5UJQcOW13s29+6QzUBAiEA2vWOepA5Apiu\npEA3pwoGdkVCrNSnnKjDQzDXBnpd3/cCIEFNd9sY4qUG4FWdXN6RnmXL7Sj0uZfH\nDMwzu8rEM5sBAiEAhvdoDNqLmbMdq3c+FsPSOeL1d21Zp/JK8kbPtFmHNf8CIQDV\n6FSZDwvWfuxaM7BsycQONkjDBTPNu+lqctJBGnBv3A==\n-----END RSA PRIVATE KEY-----\n"))
		key, _ := x509.ParsePKCS1PrivateKey(rawKey.Bytes)

		signer := &Signer{key}

		publicKey, err := signer.GetPublicKey()
		assert.NoError(t, err)
		assert.IsType(t, &rsa.PublicKey{}, publicKey)
	})

	t.Run("empty key", func(t *testing.T) {
		signer := &Signer{}

		publicKey, err := signer.GetPublicKey()
		assert.Error(t, err, "Key is empty")
		assert.Nil(t, publicKey)
	})
}