// +build !rpctest

package main

import (
	"bytes"
	"reflect"
	"testing"

	"github.com/lightningnetwork/lnd/lnwallet"
	"github.com/roasbeef/btcd/btcec"
	"github.com/roasbeef/btcd/chaincfg/chainhash"
	"github.com/roasbeef/btcd/txscript"
	"github.com/roasbeef/btcd/wire"
	"github.com/roasbeef/btcutil"
)

var (
	outPoints = []wire.OutPoint{
		{
			Hash: [chainhash.HashSize]byte{
				0x51, 0xb6, 0x37, 0xd8, 0xfc, 0xd2, 0xc6, 0xda,
				0x48, 0x59, 0xe6, 0x96, 0x31, 0x13, 0xa1, 0x17,
				0x2d, 0xe7, 0x93, 0xe4, 0xb7, 0x25, 0xb8, 0x4d,
				0x1f, 0xb, 0x4c, 0xf9, 0x9e, 0xc5, 0x8c, 0xe9,
			},
			Index: 9,
		},
		{
			Hash: [chainhash.HashSize]byte{
				0xb7, 0x94, 0x38, 0x5f, 0x2d, 0x1e, 0xf7, 0xab,
				0x4d, 0x92, 0x73, 0xd1, 0x90, 0x63, 0x81, 0xb4,
				0x4f, 0x2f, 0x6f, 0x25, 0x88, 0xa3, 0xef, 0xb9,
				0x6a, 0x49, 0x18, 0x83, 0x31, 0x98, 0x47, 0x53,
			},
			Index: 49,
		},
		{
			Hash: [chainhash.HashSize]byte{
				0x81, 0xb6, 0x37, 0xd8, 0xfc, 0xd2, 0xc6, 0xda,
				0x63, 0x59, 0xe6, 0x96, 0x31, 0x13, 0xa1, 0x17,
				0xd, 0xe7, 0x95, 0xe4, 0xb7, 0x25, 0xb8, 0x4d,
				0x1e, 0xb, 0x4c, 0xfd, 0x9e, 0xc5, 0x8c, 0xe9,
			},
			Index: 23,
		},
	}

	keys = [][]byte{
		{0x04, 0x11, 0xdb, 0x93, 0xe1, 0xdc, 0xdb, 0x8a,
			0x01, 0x6b, 0x49, 0x84, 0x0f, 0x8c, 0x53, 0xbc, 0x1e,
			0xb6, 0x8a, 0x38, 0x2e, 0x97, 0xb1, 0x48, 0x2e, 0xca,
			0xd7, 0xb1, 0x48, 0xa6, 0x90, 0x9a, 0x5c, 0xb2, 0xe0,
			0xea, 0xdd, 0xfb, 0x84, 0xcc, 0xf9, 0x74, 0x44, 0x64,
			0xf8, 0x2e, 0x16, 0x0b, 0xfa, 0x9b, 0x8b, 0x64, 0xf9,
			0xd4, 0xc0, 0x3f, 0x99, 0x9b, 0x86, 0x43, 0xf6, 0x56,
			0xb4, 0x12, 0xa3,
		},
		{0x07, 0x11, 0xdb, 0x93, 0xe1, 0xdc, 0xdb, 0x8a,
			0x01, 0x6b, 0x49, 0x84, 0x0f, 0x8c, 0x53, 0xbc, 0x1e,
			0xb6, 0x8a, 0x38, 0x2e, 0x97, 0xb1, 0x48, 0x2e, 0xca,
			0xd7, 0xb1, 0x48, 0xa6, 0x90, 0x9a, 0x5c, 0xb2, 0xe0,
			0xea, 0xdd, 0xfb, 0x84, 0xcc, 0xf9, 0x74, 0x44, 0x64,
			0xf8, 0x2e, 0x16, 0x0b, 0xfa, 0x9b, 0x8b, 0x64, 0xf9,
			0xd4, 0xc0, 0x3f, 0x99, 0x9b, 0x86, 0x43, 0xf6, 0x56,
			0xb4, 0x12, 0xa3,
		},
		{0x02, 0xce, 0x0b, 0x14, 0xfb, 0x84, 0x2b, 0x1b,
			0xa5, 0x49, 0xfd, 0xd6, 0x75, 0xc9, 0x80, 0x75, 0xf1,
			0x2e, 0x9c, 0x51, 0x0f, 0x8e, 0xf5, 0x2b, 0xd0, 0x21,
			0xa9, 0xa1, 0xf4, 0x80, 0x9d, 0x3b, 0x4d,
		},
	}

	signDescriptors = []lnwallet.SignDescriptor{
		{
			SingleTweak: []byte{
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02,
			},
			WitnessScript: []byte{
				0x00, 0x14, 0xee, 0x91, 0x41, 0x7e, 0x85, 0x6c, 0xde,
				0x10, 0xa2, 0x91, 0x1e, 0xdc, 0xbd, 0xbd, 0x69, 0xe2,
				0xef, 0xb5, 0x71, 0x48,
			},
			Output: &wire.TxOut{
				Value: 5000000000,
				PkScript: []byte{
					0x41, // OP_DATA_65
					0x04, 0xd6, 0x4b, 0xdf, 0xd0, 0x9e, 0xb1, 0xc5,
					0xfe, 0x29, 0x5a, 0xbd, 0xeb, 0x1d, 0xca, 0x42,
					0x81, 0xbe, 0x98, 0x8e, 0x2d, 0xa0, 0xb6, 0xc1,
					0xc6, 0xa5, 0x9d, 0xc2, 0x26, 0xc2, 0x86, 0x24,
					0xe1, 0x81, 0x75, 0xe8, 0x51, 0xc9, 0x6b, 0x97,
					0x3d, 0x81, 0xb0, 0x1c, 0xc3, 0x1f, 0x04, 0x78,
					0x34, 0xbc, 0x06, 0xd6, 0xd6, 0xed, 0xf6, 0x20,
					0xd1, 0x84, 0x24, 0x1a, 0x6a, 0xed, 0x8b, 0x63,
					0xa6, // 65-byte signature
					0xac, // OP_CHECKSIG
				},
			},
			HashType: txscript.SigHashAll,
		},
		{
			SingleTweak: []byte{
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02,
			},
			WitnessScript: []byte{
				0x00, 0x14, 0xee, 0x91, 0x41, 0x7e, 0x85, 0x6c, 0xde,
				0x10, 0xa2, 0x91, 0x1e, 0xdc, 0xbd, 0xbd, 0x69, 0xe2,
				0xef, 0xb5, 0x71, 0x48,
			},
			Output: &wire.TxOut{
				Value: 5000000000,
				PkScript: []byte{
					0x41, // OP_DATA_65
					0x04, 0xd6, 0x4b, 0xdf, 0xd0, 0x9e, 0xb1, 0xc5,
					0xfe, 0x29, 0x5a, 0xbd, 0xeb, 0x1d, 0xca, 0x42,
					0x81, 0xbe, 0x98, 0x8e, 0x2d, 0xa0, 0xb6, 0xc1,
					0xc6, 0xa5, 0x9d, 0xc2, 0x26, 0xc2, 0x86, 0x24,
					0xe1, 0x81, 0x75, 0xe8, 0x51, 0xc9, 0x6b, 0x97,
					0x3d, 0x81, 0xb0, 0x1c, 0xc3, 0x1f, 0x04, 0x78,
					0x34, 0xbc, 0x06, 0xd6, 0xd6, 0xed, 0xf6, 0x20,
					0xd1, 0x84, 0x24, 0x1a, 0x6a, 0xed, 0x8b, 0x63,
					0xa6, // 65-byte signature
					0xac, // OP_CHECKSIG
				},
			},
			HashType: txscript.SigHashAll,
		},
		{
			SingleTweak: []byte{
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
				0x02, 0x02, 0x02, 0x02, 0x02,
			},
			WitnessScript: []byte{
				0x00, 0x14, 0xee, 0x91, 0x41, 0x7e, 0x85, 0x6c, 0xde,
				0x10, 0xa2, 0x91, 0x1e, 0xdc, 0xbd, 0xbd, 0x69, 0xe2,
				0xef, 0xb5, 0x71, 0x48,
			},
			Output: &wire.TxOut{
				Value: 5000000000,
				PkScript: []byte{
					0x41, // OP_DATA_65
					0x04, 0xd6, 0x4b, 0xdf, 0xd0, 0x9e, 0xb1, 0xc5,
					0xfe, 0x29, 0x5a, 0xbd, 0xeb, 0x1d, 0xca, 0x42,
					0x81, 0xbe, 0x98, 0x8e, 0x2d, 0xa0, 0xb6, 0xc1,
					0xc6, 0xa5, 0x9d, 0xc2, 0x26, 0xc2, 0x86, 0x24,
					0xe1, 0x81, 0x75, 0xe8, 0x51, 0xc9, 0x6b, 0x97,
					0x3d, 0x81, 0xb0, 0x1c, 0xc3, 0x1f, 0x04, 0x78,
					0x34, 0xbc, 0x06, 0xd6, 0xd6, 0xed, 0xf6, 0x20,
					0xd1, 0x84, 0x24, 0x1a, 0x6a, 0xed, 0x8b, 0x63,
					0xa6, // 65-byte signature
					0xac, // OP_CHECKSIG
				},
			},
			HashType: txscript.SigHashAll,
		},
	}

	kidOutputs = []kidOutput{
		{
			breachedOutput: breachedOutput{
				amt:         btcutil.Amount(13e7),
				outpoint:    outPoints[0],
				witnessType: lnwallet.CommitmentTimeLock,
			},
			originChanPoint:  outPoints[1],
			blocksToMaturity: uint32(100),
			confHeight:       uint32(1770001),
		},

		{
			breachedOutput: breachedOutput{
				amt:         btcutil.Amount(24e7),
				outpoint:    outPoints[1],
				witnessType: lnwallet.CommitmentTimeLock,
			},
			originChanPoint:  outPoints[0],
			blocksToMaturity: uint32(50),
			confHeight:       uint32(22342321),
		},

		{
			breachedOutput: breachedOutput{
				amt:         btcutil.Amount(2e5),
				outpoint:    outPoints[2],
				witnessType: lnwallet.CommitmentTimeLock,
			},
			originChanPoint:  outPoints[2],
			blocksToMaturity: uint32(12),
			confHeight:       uint32(34241),
		},
	}

	babyOutputs = []babyOutput{
		{
			kidOutput: kidOutputs[0],
			expiry:    3829,
			timeoutTx: timeoutTx,
		},
		{
			kidOutput: kidOutputs[1],
			expiry:    85903,
			timeoutTx: timeoutTx,
		},
		{
			kidOutput: kidOutputs[2],
			expiry:    4,
			timeoutTx: timeoutTx,
		},
	}

	// Dummy timeout tx used to test serialization, borrowed from btcd
	// msgtx_test
	timeoutTx = &wire.MsgTx{
		Version: 1,
		TxIn: []*wire.TxIn{
			{
				PreviousOutPoint: wire.OutPoint{
					Hash: chainhash.Hash{
						0xa5, 0x33, 0x52, 0xd5, 0x13, 0x57, 0x66, 0xf0,
						0x30, 0x76, 0x59, 0x74, 0x18, 0x26, 0x3d, 0xa2,
						0xd9, 0xc9, 0x58, 0x31, 0x59, 0x68, 0xfe, 0xa8,
						0x23, 0x52, 0x94, 0x67, 0x48, 0x1f, 0xf9, 0xcd,
					},
					Index: 19,
				},
				SignatureScript: []byte{},
				Witness: [][]byte{
					{ // 70-byte signature
						0x30, 0x43, 0x02, 0x1f, 0x4d, 0x23, 0x81, 0xdc,
						0x97, 0xf1, 0x82, 0xab, 0xd8, 0x18, 0x5f, 0x51,
						0x75, 0x30, 0x18, 0x52, 0x32, 0x12, 0xf5, 0xdd,
						0xc0, 0x7c, 0xc4, 0xe6, 0x3a, 0x8d, 0xc0, 0x36,
						0x58, 0xda, 0x19, 0x02, 0x20, 0x60, 0x8b, 0x5c,
						0x4d, 0x92, 0xb8, 0x6b, 0x6d, 0xe7, 0xd7, 0x8e,
						0xf2, 0x3a, 0x2f, 0xa7, 0x35, 0xbc, 0xb5, 0x9b,
						0x91, 0x4a, 0x48, 0xb0, 0xe1, 0x87, 0xc5, 0xe7,
						0x56, 0x9a, 0x18, 0x19, 0x70, 0x01,
					},
					{ // 33-byte serialize pub key
						0x03, 0x07, 0xea, 0xd0, 0x84, 0x80, 0x7e, 0xb7,
						0x63, 0x46, 0xdf, 0x69, 0x77, 0x00, 0x0c, 0x89,
						0x39, 0x2f, 0x45, 0xc7, 0x64, 0x25, 0xb2, 0x61,
						0x81, 0xf5, 0x21, 0xd7, 0xf3, 0x70, 0x06, 0x6a,
						0x8f,
					},
				},
				Sequence: 0xffffffff,
			},
		},
		TxOut: []*wire.TxOut{
			{
				Value: 395019,
				PkScript: []byte{ // p2wkh output
					0x00, // Version 0 witness program
					0x14, // OP_DATA_20
					0x9d, 0xda, 0xc6, 0xf3, 0x9d, 0x51, 0xe0, 0x39,
					0x8e, 0x53, 0x2a, 0x22, 0xc4, 0x1b, 0xa1, 0x89,
					0x40, 0x6a, 0x85, 0x23, // 20-byte pub key hash
				},
			},
		},
	}
)

func init() {
	for i := range signDescriptors {

		pk, err := btcec.ParsePubKey(keys[i], btcec.S256())
		if err != nil {
			panic("unable to parse pub key: %v")
		}
		signDescriptors[i].PubKey = pk

		kidOutputs[i].signDesc = signDescriptors[i]
		babyOutputs[i].kidOutput.signDesc = signDescriptors[i]

	}
}

func TestDeserializeKidsList(t *testing.T) {
	var b bytes.Buffer
	for _, kid := range kidOutputs {
		if err := kid.Encode(&b); err != nil {
			t.Fatalf("unable to serialize and add kid output to "+
				"list: %v", err)
		}
	}

	kidList, err := deserializeKidList(&b)
	if err != nil {
		t.Fatalf("unable to deserialize kid output list: %v", err)
	}

	for i := range kidOutputs {
		if !reflect.DeepEqual(&kidOutputs[i], kidList[i]) {
			t.Fatalf("kidOutputs don't match \n%+v\n%+v",
				&kidOutputs[i], kidList[i])
		}
	}
}

func TestKidOutputSerialization(t *testing.T) {
	for i, kid := range kidOutputs {
		var b bytes.Buffer
		if err := kid.Encode(&b); err != nil {
			t.Fatalf("Encode #%d: unable to serialize "+
				"kid output: %v", i, err)
		}

		var deserializedKid kidOutput
		if err := deserializedKid.Decode(&b); err != nil {
			t.Fatalf("Decode #%d: unable to deserialize "+
				"kid output: %v", i, err)
		}

		if !reflect.DeepEqual(kid, deserializedKid) {
			t.Fatalf("DeepEqual #%d: unexpected kidOutput, "+
				"want %+v, got %+v",
				i, kid, deserializedKid)
		}
	}
}

func TestBabyOutputSerialization(t *testing.T) {
	for i, baby := range babyOutputs {
		var b bytes.Buffer
		if err := baby.Encode(&b); err != nil {
			t.Fatalf("Encode #%d: unable to serialize "+
				"baby output: %v", i, err)
		}

		var deserializedBaby babyOutput
		if err := deserializedBaby.Decode(&b); err != nil {
			t.Fatalf("Decode #%d: unable to deserialize "+
				"baby output: %v", i, err)
		}

		if !reflect.DeepEqual(baby, deserializedBaby) {
			t.Fatalf("DeepEqual #%d: unexpected babyOutput, "+
				"want %+v, got %+v",
				i, baby, deserializedBaby)
		}

	}
}