// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0

package filereceiver

import (
	"context"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.opentelemetry.io/collector/pdata/pcommon"
)

func TestReplayTimer(t *testing.T) {
	s := &fakeSleeper{}
	timer := &replayTimer{
		throttle:  0.5,
		sleepFunc: s.fakeSleep,
	}
	firstMetricTime := time.Date(2020, time.January, 1, 1, 0, 0, 0, time.UTC)
	err := timer.wait(context.Background(), pcommon.NewTimestampFromTime(firstMetricTime))
	require.NoError(t, err)
	secondMetricTime := firstMetricTime.Add(time.Second * 10)
	err = timer.wait(context.Background(), pcommon.NewTimestampFromTime(secondMetricTime))
	require.NoError(t, err)
	err = timer.wait(context.Background(), 0)
	require.NoError(t, err)
	assert.Equal(t, s.durations, []time.Duration{0, time.Second * 5})
}

type fakeSleeper struct {
	durations []time.Duration
}

func (t *fakeSleeper) fakeSleep(_ context.Context, d time.Duration) error {
	t.durations = append(t.durations, d)
	return nil
}