// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.

package secp256k1fx

import (
	"bytes"
	"testing"

	"github.com/ava-labs/gecko/utils/crypto"
	"github.com/ava-labs/gecko/utils/codec"
)

func TestCredentialVerify(t *testing.T) {
	cred := Credential{}
	err := cred.Verify()
	if err != nil {
		t.Fatal(err)
	}
}

func TestCredentialVerifyNil(t *testing.T) {
	cred := (*Credential)(nil)
	err := cred.Verify()
	if err == nil {
		t.Fatalf("Should have errored with a nil credential")
	}
}

func TestCredentialSerialize(t *testing.T) {
	c := codec.NewDefault()

	expected := []byte{
		// length:
		0x00, 0x00, 0x00, 0x02,
		// sig[0]
		0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
		0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
		0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
		0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1e, 0x1d, 0x1f,
		0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
		0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2e, 0x2d, 0x2f,
		0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
		0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
		0x00,
		// sig[1]
		0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
		0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
		0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
		0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5e, 0x5d, 0x5f,
		0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
		0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6e, 0x6d, 0x6f,
		0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
		0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
		0x00,
	}
	cred := Credential{Sigs: [][crypto.SECP256K1RSigLen]byte{
		[crypto.SECP256K1RSigLen]byte{
			0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
			0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
			0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
			0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1e, 0x1d, 0x1f,
			0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
			0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2e, 0x2d, 0x2f,
			0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
			0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
			0x00,
		},
		[crypto.SECP256K1RSigLen]byte{
			0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
			0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
			0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
			0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5e, 0x5d, 0x5f,
			0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
			0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6e, 0x6d, 0x6f,
			0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
			0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
			0x00,
		},
	}}
	err := cred.Verify()
	if err != nil {
		t.Fatal(err)
	}

	result, err := c.Marshal(&cred)
	if err != nil {
		t.Fatal(err)
	}

	if !bytes.Equal(expected, result) {
		t.Fatalf("\nExpected: 0x%x\nResult:   0x%x", expected, result)
	}
}