// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//       http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package pdata

import (
	"testing"

	"github.com/stretchr/testify/assert"

	"go.opentelemetry.io/collector/model/internal"
	otlplogs "go.opentelemetry.io/collector/model/internal/data/protogen/logs/v1"
)

func TestLogRecordCount(t *testing.T) {
	md := NewLogs()
	assert.EqualValues(t, 0, md.LogRecordCount())

	rl := md.ResourceLogs().AppendEmpty()
	assert.EqualValues(t, 0, md.LogRecordCount())

	ill := rl.InstrumentationLibraryLogs().AppendEmpty()
	assert.EqualValues(t, 0, md.LogRecordCount())

	ill.Logs().AppendEmpty()
	assert.EqualValues(t, 1, md.LogRecordCount())

	rms := md.ResourceLogs()
	rms.EnsureCapacity(3)
	rms.AppendEmpty().InstrumentationLibraryLogs().AppendEmpty()
	illl := rms.AppendEmpty().InstrumentationLibraryLogs().AppendEmpty().Logs()
	for i := 0; i < 5; i++ {
		illl.AppendEmpty()
	}
	// 5 + 1 (from rms.At(0) initialized first)
	assert.EqualValues(t, 6, md.LogRecordCount())
}

func TestLogRecordCountWithEmpty(t *testing.T) {
	assert.Zero(t, NewLogs().LogRecordCount())
	assert.Zero(t, Logs{orig: &otlplogs.LogsData{
		ResourceLogs: []*otlplogs.ResourceLogs{{}},
	}}.LogRecordCount())
	assert.Zero(t, Logs{orig: &otlplogs.LogsData{
		ResourceLogs: []*otlplogs.ResourceLogs{
			{
				InstrumentationLibraryLogs: []*otlplogs.InstrumentationLibraryLogs{{}},
			},
		},
	}}.LogRecordCount())
	assert.Equal(t, 1, Logs{orig: &otlplogs.LogsData{
		ResourceLogs: []*otlplogs.ResourceLogs{
			{
				InstrumentationLibraryLogs: []*otlplogs.InstrumentationLibraryLogs{
					{
						Logs: []*otlplogs.LogRecord{{}},
					},
				},
			},
		},
	}}.LogRecordCount())
}

func TestToFromLogProto(t *testing.T) {
	wrapper := internal.LogsFromOtlp(&otlplogs.LogsData{})
	ld := LogsFromInternalRep(wrapper)
	assert.EqualValues(t, NewLogs(), ld)
	assert.EqualValues(t, &otlplogs.LogsData{}, ld.orig)
}

func TestLogsClone(t *testing.T) {
	logs := NewLogs()
	fillTestResourceLogsSlice(logs.ResourceLogs())
	assert.EqualValues(t, logs, logs.Clone())
}

func BenchmarkLogsClone(b *testing.B) {
	logs := NewLogs()
	fillTestResourceLogsSlice(logs.ResourceLogs())
	b.ResetTimer()
	for n := 0; n < b.N; n++ {
		clone := logs.Clone()
		if clone.ResourceLogs().Len() != logs.ResourceLogs().Len() {
			b.Fail()
		}
	}
}
