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

package spdagvm

import (
	"bytes"
	"testing"

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

func TestUTXO(t *testing.T) {
	skBytes := []byte{
		0x98, 0xcb, 0x07, 0x7f, 0x97, 0x2f, 0xeb, 0x04,
		0x81, 0xf1, 0xd8, 0x94, 0xf2, 0x72, 0xc6, 0xa1,
		0xe3, 0xc1, 0x5e, 0x27, 0x2a, 0x16, 0x58, 0xff,
		0x71, 0x64, 0x44, 0xf4, 0x65, 0x20, 0x00, 0x70,
	}
	outputPaymentBytes := []byte{
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
		0x00, 0x00, 0x00, 0x02, 0x51, 0x02, 0x5c, 0x61,
		0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
		0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
		0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
		0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
		0x43, 0xab, 0x08, 0x59,
	}
	outputTakeOrLeaveBytes := []byte{
		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
		0x00, 0x00, 0x00, 0x01, 0x51, 0x02, 0x5c, 0x61,
		0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
		0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdd, 0xd5,
		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01,
		0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
		0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
		0x43, 0xab, 0x08, 0x59,
	}
	inputPaymentBytes := []byte{
		0x00, 0x00, 0x00, 0x00, 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, 0x1d, 0x1e, 0x1f, 0x00, 0x00, 0x00, 0x09,
		0x00, 0x00, 0x00, 0x00, 0x07, 0x5b, 0xcd, 0x15,
		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x07,
	}

	f := crypto.FactorySECP256K1R{}
	sk, err := f.ToPrivateKey(skBytes)
	if err != nil {
		t.Fatal(err)
	}

	c := Codec{}
	p := wrappers.Packer{Bytes: outputPaymentBytes}
	outputPayment := c.unmarshalOutput(&p)
	if p.Errored() {
		t.Fatal(p.Err)
	}

	p = wrappers.Packer{Bytes: outputTakeOrLeaveBytes}
	outputTakeOrLeave := c.unmarshalOutput(&p)
	if p.Errored() {
		t.Fatal(p.Err)
	}

	p = wrappers.Packer{Bytes: inputPaymentBytes}
	inputPayment := c.unmarshalInput(&p)
	if p.Errored() {
		t.Fatal(p.Err)
	}

	inputPaymentSigner := &InputSigner{
		Keys: []*crypto.PrivateKeySECP256K1R{
			sk.(*crypto.PrivateKeySECP256K1R),
		},
	}

	b := Builder{
		NetworkID: 0,
		ChainID:   ids.Empty,
	}
	tx, err := b.NewTx(
		/*inputs=*/ []Input{inputPayment},
		/*outputs=*/ []Output{outputPayment, outputTakeOrLeave},
		/*signers=*/ []*InputSigner{inputPaymentSigner},
	)
	if err != nil {
		t.Fatal(err)
	}
	utxos := tx.UTXOs()
	if len(utxos) != 2 {
		t.Fatalf("Produced %d UTXOs", len(utxos))
	}
	utxo := utxos[1]
	utxoBytes, err := c.MarshalUTXO(utxo)
	if err != nil {
		t.Fatal(err)
	}

	expected := []byte{
		// txID:
		0xc7, 0xe6, 0xe2, 0xd3, 0x83, 0xa6, 0xd8, 0xac,
		0x54, 0xdc, 0xc8, 0x4e, 0x32, 0x7c, 0x22, 0xa5,
		0x6a, 0xf1, 0x25, 0x88, 0x33, 0x75, 0x0f, 0x94,
		0x54, 0x1b, 0xdb, 0xa2, 0xc0, 0xac, 0x67, 0x38,
		// output index:
		0x00, 0x00, 0x00, 0x01,
		// output:
		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0x30, 0x39, 0x00, 0x00, 0x00, 0x00,
		0x00, 0x00, 0xd4, 0x31, 0x00, 0x00, 0x00, 0x01,
		0x00, 0x00, 0x00, 0x01, 0x51, 0x02, 0x5c, 0x61,
		0xfb, 0xcf, 0xc0, 0x78, 0xf6, 0x93, 0x34, 0xf8,
		0x34, 0xbe, 0x6d, 0xd2, 0x6d, 0x55, 0xa9, 0x55,
		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xdd, 0xd5,
		0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01,
		0xc3, 0x34, 0x41, 0x28, 0xe0, 0x60, 0x12, 0x8e,
		0xde, 0x35, 0x23, 0xa2, 0x4a, 0x46, 0x1c, 0x89,
		0x43, 0xab, 0x08, 0x59,
	}

	if !bytes.Equal(utxoBytes, expected) {
		t.Fatalf("Codec.MarshalUTXO returned:\n0x%x\nExpected:\n0x%x", utxoBytes, expected)
	}
}