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

package opencensusexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/opencensusexporter"

import (
	"context"

	"go.opentelemetry.io/collector/component"
	"go.opentelemetry.io/collector/config/configgrpc"
	"go.opentelemetry.io/collector/consumer"
	"go.opentelemetry.io/collector/exporter"
	"go.opentelemetry.io/collector/exporter/exporterhelper"

	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/opencensusexporter/internal/metadata"
)

// NewFactory creates a factory for OTLP exporter.
func NewFactory() exporter.Factory {
	return exporter.NewFactory(
		metadata.Type,
		createDefaultConfig,
		exporter.WithTraces(createTracesExporter, metadata.TracesStability),
		exporter.WithMetrics(createMetricsExporter, metadata.MetricsStability))
}

func createDefaultConfig() component.Config {
	return &Config{
		GRPCClientSettings: configgrpc.GRPCClientSettings{
			// We almost read 0 bytes, so no need to tune ReadBufferSize.
			WriteBufferSize: 512 * 1024,
		},
		NumWorkers: 2,
	}
}

func createTracesExporter(ctx context.Context, set exporter.CreateSettings, cfg component.Config) (exporter.Traces, error) {
	oCfg := cfg.(*Config)
	oce, err := newTracesExporter(ctx, oCfg, set.TelemetrySettings)
	if err != nil {
		return nil, err
	}

	return exporterhelper.NewTracesExporter(
		ctx,
		set,
		cfg,
		oce.pushTraces,
		exporterhelper.WithCapabilities(consumer.Capabilities{MutatesData: false}),
		exporterhelper.WithRetry(oCfg.RetrySettings),
		exporterhelper.WithQueue(oCfg.QueueSettings),
		exporterhelper.WithStart(oce.start),
		exporterhelper.WithShutdown(oce.shutdown))
}

func createMetricsExporter(ctx context.Context, set exporter.CreateSettings, cfg component.Config) (exporter.Metrics, error) {
	oCfg := cfg.(*Config)
	oce, err := newMetricsExporter(ctx, oCfg, set.TelemetrySettings)
	if err != nil {
		return nil, err
	}

	return exporterhelper.NewMetricsExporter(
		ctx,
		set,
		cfg,
		oce.pushMetrics,
		exporterhelper.WithCapabilities(consumer.Capabilities{MutatesData: false}),
		exporterhelper.WithRetry(oCfg.RetrySettings),
		exporterhelper.WithQueue(oCfg.QueueSettings),
		exporterhelper.WithStart(oce.start),
		exporterhelper.WithShutdown(oce.shutdown))
}