package streamdata_test

import (
	"encoding/hex"
	"reflect"
	"strconv"
	"testing"

	"git.gensokyo.uk/yonah/streamdata"
)

func TestIdent(t *testing.T) {
	t.Parallel()

	testCases := []struct {
		name  string
		data  string
		ident *streamdata.Ident
		err   error
	}{
		{"sample0", "2717837930-430126387-fd9c9877-00e1-47e3-867b-916cd1e6b90c", &streamdata.Ident{
			Serial:  2717837930,
			Channel: 430126387,
			Data: [streamdata.IdentFFLen]byte{
				0xfd, 0x9c, 0x98, 0x77,
				0x00, 0xe1,
				0x47, 0xe3,
				0x86, 0x7b,
				0x91, 0x6c, 0xd1, 0xe6, 0xb9, 0x0c,
			},
		}, nil},

		{"sample1", "2719457116-430126387-8f8dbbd4-26e7-4fbe-bc3b-fb71c93b5c39", &streamdata.Ident{
			Serial:  2719457116,
			Channel: 430126387,
			Data: [streamdata.IdentFFLen]byte{
				0x8f, 0x8d, 0xbb, 0xd4,
				0x26, 0xe7,
				0x4f, 0xbe,
				0xbc, 0x3b,
				0xfb, 0x71, 0xc9, 0x3b, 0x5c, 0x39,
			},
		}, nil},

		{"sample2", "2721992950-430126387-08ad437f-3599-43d6-9934-83f31265e9d0", &streamdata.Ident{
			Serial:  2721992950,
			Channel: 430126387,
			Data: [streamdata.IdentFFLen]byte{
				0x08, 0xad, 0x43, 0x7f,
				0x35, 0x99,
				0x43, 0xd6,
				0x99, 0x34,
				0x83, 0xf3, 0x12, 0x65, 0xe9, 0xd0,
			},
		}, nil},

		{"field count", "", nil, streamdata.IdentFieldError(1)},
		{"invalid serial", "\x00------", nil, strconv.ErrSyntax},
		{"invalid channel", "0-\x00-----", nil, strconv.ErrSyntax},
		{"short ff0", "0-0-ff----", nil, &streamdata.IdentFFError{Got: 1, Want: 4}},
		{"long ff1", "0-0-deadbeef-fefefe---", nil, &streamdata.IdentFFError{Got: 3, Want: 2}},
		{"short ff2", "0-0-deadbeef-fefe-fd--", nil, &streamdata.IdentFFError{Got: 1, Want: 2}},
		{"long ff3", "0-0-deadbeef-fefe-fdfd-fcfcfcfc-", nil, &streamdata.IdentFFError{Got: 4, Want: 2}},
		{"short ff4", "0-0-deadbeef-fefe-fdfd-fcfc-cafe", nil, &streamdata.IdentFFError{Got: 2, Want: 6}},
		{"invalid ff", "0-0-deadbeef-fefe-fdfd-fcfc-meow", nil, hex.InvalidByteError('m')},
	}
	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()

			t.Run("decode", func(t *testing.T) {
				t.Parallel()

				var got streamdata.Ident
				if err := got.UnmarshalText([]byte(tc.data)); !reflect.DeepEqual(err, tc.err) {
					t.Errorf("UnmarshalText: error = %v, want %v", err, tc.err)
				}

				if tc.err == nil && !reflect.DeepEqual(&got, tc.ident) {
					t.Errorf("UnmarshalText: %#v, want %#v", got, *tc.ident)
				}
			})

			if tc.err != nil {
				return
			}

			t.Run("encode", func(t *testing.T) {
				t.Parallel()

				if got := tc.ident.String(); got != tc.data {
					t.Fatalf("String: %s, want %s", got, tc.data)
				}

				if got, err := tc.ident.MarshalText(); err != nil {
					t.Fatalf("MarshalText: error = %v", err)
				} else if string(got) != tc.data {
					t.Errorf("MarshalText: %s, want %s", string(got), tc.data)
				}
			})
		})
	}
}