// 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 googlecloudpubsubreceiver

import (
	"path/filepath"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.opentelemetry.io/collector/component"
	"go.opentelemetry.io/collector/confmap/confmaptest"
	"go.opentelemetry.io/collector/exporter/exporterhelper"
)

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

	cm, err := confmaptest.LoadConf(filepath.Join("testdata", "config.yaml"))
	require.NoError(t, err)

	tests := []struct {
		id          component.ID
		expected    component.Config
		expectedErr error
	}{
		{
			id:       component.NewIDWithName(typeStr, ""),
			expected: &Config{},
		},
		{
			id: component.NewIDWithName(typeStr, "customname"),
			expected: &Config{
				ProjectID: "my-project",
				UserAgent: "opentelemetry-collector-contrib {{version}}",
				TimeoutSettings: exporterhelper.TimeoutSettings{
					Timeout: 20 * time.Second,
				},
				Subscription: "projects/my-project/subscriptions/otlp-subscription",
			},
		},
	}

	for _, tt := range tests {
		t.Run(tt.id.String(), func(t *testing.T) {
			factory := NewFactory()
			cfg := factory.CreateDefaultConfig()

			sub, err := cm.Sub(tt.id.String())
			require.NoError(t, err)
			require.NoError(t, component.UnmarshalConfig(sub, cfg))

			assert.NoError(t, component.ValidateConfig(cfg))
			assert.Equal(t, tt.expected, cfg)
		})
	}
}

func TestConfigValidation(t *testing.T) {
	factory := NewFactory()
	c := factory.CreateDefaultConfig().(*Config)
	assert.Error(t, c.validateForTrace())
	assert.Error(t, c.validateForLog())
	assert.Error(t, c.validateForMetric())
	c.Subscription = "projects/000project/subscriptions/my-subscription"
	assert.Error(t, c.validate())
	c.Subscription = "projects/my-project/topics/my-topic"
	assert.Error(t, c.validate())
	c.Subscription = "projects/my-project/subscriptions/my-subscription"
	assert.NoError(t, c.validate())
}

func TestTraceConfigValidation(t *testing.T) {
	factory := NewFactory()
	c := factory.CreateDefaultConfig().(*Config)
	c.Subscription = "projects/my-project/subscriptions/my-subscription"
	assert.NoError(t, c.validateForTrace())

	c.Encoding = "otlp_proto_metric"
	assert.Error(t, c.validateForTrace())
	c.Encoding = "otlp_proto_log"
	assert.Error(t, c.validateForTrace())
	c.Encoding = "raw_text"
	assert.Error(t, c.validateForTrace())
	c.Encoding = "raw_json"
	assert.Error(t, c.validateForTrace())

	c.Encoding = "otlp_proto_trace"
	assert.NoError(t, c.validateForTrace())
}

func TestMetricConfigValidation(t *testing.T) {
	factory := NewFactory()
	c := factory.CreateDefaultConfig().(*Config)
	c.Subscription = "projects/my-project/subscriptions/my-subscription"
	assert.NoError(t, c.validateForMetric())

	c.Encoding = "otlp_proto_trace"
	assert.Error(t, c.validateForMetric())
	c.Encoding = "otlp_proto_log"
	assert.Error(t, c.validateForMetric())
	c.Encoding = "raw_text"
	assert.Error(t, c.validateForMetric())
	c.Encoding = "raw_json"
	assert.Error(t, c.validateForMetric())

	c.Encoding = "otlp_proto_metric"
	assert.NoError(t, c.validateForMetric())
}

func TestLogConfigValidation(t *testing.T) {
	factory := NewFactory()
	c := factory.CreateDefaultConfig().(*Config)
	c.Subscription = "projects/my-project/subscriptions/my-subscription"
	assert.NoError(t, c.validateForLog())

	c.Encoding = "otlp_proto_trace"
	assert.Error(t, c.validateForLog())
	c.Encoding = "otlp_proto_metric"
	assert.Error(t, c.validateForLog())

	c.Encoding = "raw_text"
	assert.NoError(t, c.validateForLog())
	c.Encoding = "raw_json"
	assert.NoError(t, c.validateForLog())
	c.Encoding = "otlp_proto_log"
	assert.NoError(t, c.validateForLog())
}