package htlcswitch

import (
	"bytes"
	"math/rand"
	"reflect"
	"testing"

	"github.com/davecgh/go-spew/spew"
	"github.com/lightningnetwork/lnd/lntypes"
	"github.com/lightningnetwork/lnd/lnwire"
)

// TestNetworkResultSerialization checks that NetworkResults are properly
// (de)serialized.
func TestNetworkResultSerialization(t *testing.T) {
	t.Parallel()

	var preimage lntypes.Preimage
	if _, err := rand.Read(preimage[:]); err != nil {
		t.Fatalf("unable gen rand preimag: %v", err)
	}

	var chanID lnwire.ChannelID
	if _, err := rand.Read(chanID[:]); err != nil {
		t.Fatalf("unable gen rand chanid: %v", err)
	}

	var reason [256]byte
	if _, err := rand.Read(reason[:]); err != nil {
		t.Fatalf("unable gen rand reason: %v", err)
	}

	settle := &lnwire.UpdateFulfillHTLC{
		ChanID:          chanID,
		ID:              2,
		PaymentPreimage: preimage,
	}

	fail := &lnwire.UpdateFailHTLC{
		ChanID: chanID,
		ID:     1,
		Reason: []byte{},
	}

	fail2 := &lnwire.UpdateFailHTLC{
		ChanID: chanID,
		ID:     1,
		Reason: reason[:],
	}

	testCases := []*networkResult{
		{
			msg: settle,
		},
		{
			msg:          fail,
			unencrypted:  false,
			isResolution: false,
		},
		{
			msg:          fail,
			unencrypted:  false,
			isResolution: true,
		},
		{
			msg:          fail2,
			unencrypted:  true,
			isResolution: false,
		},
	}

	for _, p := range testCases {
		var buf bytes.Buffer
		if err := serializeNetworkResult(&buf, p); err != nil {
			t.Fatalf("serialize failed: %v", err)
		}

		r := bytes.NewReader(buf.Bytes())
		p1, err := deserializeNetworkResult(r)
		if err != nil {
			t.Fatalf("unable to deserizlize: %v", err)
		}

		if !reflect.DeepEqual(p, p1) {
			t.Fatalf("not equal. %v vs %v", spew.Sdump(p),
				spew.Sdump(p1))
		}
	}
}