package handshake

import (
	"bytes"
	"testing"

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

var c1enc = append(
	[]byte{
		0x19, 0xf1, 0x27, 0xa3, 0x00, 0x00, 0x00, 0x00,
		0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04,
		0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x2d, 0x0a,
		0x37, 0x6f, 0x63, 0x2e, 0xa0, 0x21, 0xa0, 0xa4,
		0x81, 0xb1, 0x50, 0x21, 0x5a, 0x6d, 0x81, 0xad,
		0xf8, 0x44, 0x69, 0x13, 0xcc, 0x02, 0x8c, 0xd4,
		0x64, 0x43, 0xc9, 0x9f, 0xcf, 0xc6, 0x03, 0x04,
	},
	bytes.Repeat([]byte{0x01, 0x02, 0x03, 0x04}, 370)...,
)

var s1enc = append(
	[]byte{
		0x19, 0xf1, 0x27, 0xa3, 0x00, 0x00, 0x00, 0x00,
		0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04,
		0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x95, 0xc1,
		0xb6, 0x2c, 0x99, 0xbe, 0xa0, 0x0c, 0x07, 0x98,
		0xb0, 0xf1, 0xbe, 0x54, 0x50, 0x63, 0xa1, 0x25,
		0x1c, 0x9a, 0xcd, 0x12, 0x10, 0x98, 0x74, 0x8b,
		0x18, 0x66, 0x8d, 0xef, 0xcf, 0x22, 0x03, 0x04,
	},
	bytes.Repeat([]byte{0x01, 0x02, 0x03, 0x04}, 370)...,
)

func TestC1S1Read(t *testing.T) {
	for _, ca := range []struct {
		isC1 bool
		enc  []byte
		dec  C1S1
	}{
		{
			true,
			c1enc,
			C1S1{
				Time: 435234723,
				Random: append(
					[]byte{
						0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04,
						0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x2d, 0x0a,
						0x37, 0x6f, 0x63, 0x2e, 0xa0, 0x21, 0xa0, 0xa4,
						0x81, 0xb1, 0x50, 0x21, 0x5a, 0x6d, 0x81, 0xad,
						0xf8, 0x44, 0x69, 0x13, 0xcc, 0x02, 0x8c, 0xd4,
						0x64, 0x43, 0xc9, 0x9f, 0xcf, 0xc6, 0x03, 0x04,
					},
					bytes.Repeat([]byte{0x01, 0x02, 0x03, 0x04}, 370)...,
				),
				Digest: []byte{
					0x3f, 0xd0, 0xb1, 0xdf, 0xed, 0x6c, 0x9b, 0xc3,
					0x73, 0x68, 0xe2, 0x47, 0x92, 0x59, 0x32, 0x9a,
					0x3a, 0xc9, 0x1e, 0xeb, 0xfc, 0xad, 0x8e, 0x9d,
					0x4e, 0xf4, 0x30, 0xb1, 0x9a, 0xc9, 0x15, 0x99,
				},
			},
		},
		{
			false,
			s1enc,
			C1S1{
				Time: 435234723,
				Random: append(
					[]byte{
						0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04,
						0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x95, 0xc1,
						0xb6, 0x2c, 0x99, 0xbe, 0xa0, 0x0c, 0x07, 0x98,
						0xb0, 0xf1, 0xbe, 0x54, 0x50, 0x63, 0xa1, 0x25,
						0x1c, 0x9a, 0xcd, 0x12, 0x10, 0x98, 0x74, 0x8b,
						0x18, 0x66, 0x8d, 0xef, 0xcf, 0x22, 0x03, 0x04,
					},
					bytes.Repeat([]byte{0x01, 0x02, 0x03, 0x04}, 370)...,
				),
				Digest: []byte{
					0x0e, 0x8f, 0x96, 0x19, 0x19, 0xe6, 0xb7, 0xf2,
					0xac, 0x9a, 0xc8, 0x7e, 0x6e, 0xe9, 0xd4, 0x72,
					0xed, 0x82, 0x87, 0xf1, 0xfa, 0xbd, 0x93, 0xb8,
					0x7c, 0x48, 0x85, 0x03, 0x01, 0x7b, 0x54, 0xbe,
				},
			},
		},
	} {
		var c1s1 C1S1
		err := c1s1.Read((bytes.NewReader(ca.enc)), ca.isC1, true)
		require.NoError(t, err)
		require.Equal(t, ca.dec, c1s1)
	}
}

func TestC1S1Write(t *testing.T) {
	for _, ca := range []struct {
		isC1 bool
		enc  []byte
		dec  C1S1
	}{
		{
			true,
			c1enc,
			C1S1{
				Time:   435234723,
				Random: bytes.Repeat([]byte{0x01, 0x02, 0x03, 0x04}, 382),
				Digest: []byte{
					0x3f, 0xd0, 0xb1, 0xdf, 0xed, 0x6c, 0x9b, 0xc3,
					0x73, 0x68, 0xe2, 0x47, 0x92, 0x59, 0x32, 0x9a,
					0x3a, 0xc9, 0x1e, 0xeb, 0xfc, 0xad, 0x8e, 0x9d,
					0x4e, 0xf4, 0x30, 0xb1, 0x9a, 0xc9, 0x15, 0x99,
				},
			},
		},
		{
			false,
			s1enc,
			C1S1{
				Time:   435234723,
				Random: bytes.Repeat([]byte{0x01, 0x02, 0x03, 0x04}, 382),
				Digest: []byte{
					0x3f, 0xd0, 0xb1, 0xdf, 0xed, 0x6c, 0x9b, 0xc3,
					0x73, 0x68, 0xe2, 0x47, 0x92, 0x59, 0x32, 0x9a,
					0x3a, 0xc9, 0x1e, 0xeb, 0xfc, 0xad, 0x8e, 0x9d,
					0x4e, 0xf4, 0x30, 0xb1, 0x9a, 0xc9, 0x15, 0x99,
				},
			},
		},
	} {
		var buf bytes.Buffer
		err := ca.dec.Write(&buf, ca.isC1)
		require.NoError(t, err)
		require.Equal(t, ca.enc, buf.Bytes())
	}
}