package local

import (
	"regexp"
	"testing"
	"time"

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

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

	now := Clock{}.Now()

	assert.Equal(t, time.UTC, now.Location())
}

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

	generator := IDGenerator{}

	challengeID, err := generator.NewChallengeID()
	require.NoError(t, err)
	require.NoError(t, challengeID.Validate())
	assert.Regexp(t, regexp.MustCompile(`^challenge-[A-Za-z0-9_-]+$`), challengeID.String())

	deviceSessionID, err := generator.NewDeviceSessionID()
	require.NoError(t, err)
	require.NoError(t, deviceSessionID.Validate())
	assert.Regexp(t, regexp.MustCompile(`^device-session-[A-Za-z0-9_-]+$`), deviceSessionID.String())
}

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

	code, err := CodeGenerator{}.Generate()
	require.NoError(t, err)
	assert.Regexp(t, regexp.MustCompile(`^\d{6}$`), code)
}

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

	hasher := CodeHasher{}

	hash, err := hasher.Hash("123456")
	require.NoError(t, err)
	require.NotEmpty(t, hash)

	match, err := hasher.Compare(hash, "123456")
	require.NoError(t, err)
	assert.True(t, match)

	match, err = hasher.Compare(hash, "000000")
	require.NoError(t, err)
	assert.False(t, match)
}