// Copyright 2024 CloudWeGo 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 email

import (
	"context"

	"github.com/cloudwego/biz-demo/gomall/app/email/infra/mq"
	"github.com/cloudwego/biz-demo/gomall/app/email/infra/notify"
	"github.com/cloudwego/kitex/pkg/klog"
	"github.com/cloudwego/kitex/server"
	"github.com/nats-io/nats.go"
	"go.opentelemetry.io/otel"
	"go.opentelemetry.io/otel/propagation"
	"google.golang.org/protobuf/proto"

	"github.com/cloudwego/biz-demo/gomall/rpc_gen/kitex_gen/email"
)

func ConsumerInit() {
	// Connect to a server

	tracer := otel.Tracer("shop-nats-consumer")
	sub, err := mq.Nc.Subscribe("email", func(m *nats.Msg) {
		var req email.EmailReq
		err := proto.Unmarshal(m.Data, &req)
		if err != nil {
			klog.Error(err)
		}
		noopEmail := notify.NewNoopEmail()
		_ = noopEmail.Send(&req)

		// consumer otel
		ctx := context.Background()
		ctx = otel.GetTextMapPropagator().Extract(ctx, propagation.HeaderCarrier(m.Header))
		_, span := tracer.Start(ctx, "shop-email-consumer")
		defer span.End()
		// consumer otel
	})
	if err != nil {
		panic(err)
	}

	server.RegisterShutdownHook(func() {
		sub.Unsubscribe() //nolint:errcheck
		mq.Nc.Close()
	})
}
