// Copyright 2025 Google LLC
//
// 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
//
//     https://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 schema

// [START pubsub_old_version_get_schema]
import (
	"context"
	"fmt"
	"io"

	"cloud.google.com/go/pubsub"
)

func getSchema(w io.Writer, projectID, schemaID string) error {
	// projectID := "my-project-id"
	// schemaID := "my-schema"
	ctx := context.Background()
	client, err := pubsub.NewSchemaClient(ctx, projectID)
	if err != nil {
		return fmt.Errorf("pubsub.NewSchemaClient: %w", err)
	}
	defer client.Close()

	// Retrieve the full schema view. If you don't want to retrieve the
	// definition, pass in pubsub.SchemaViewBasic which retrieves
	// just the name and type of the schema.
	s, err := client.Schema(ctx, schemaID, pubsub.SchemaViewFull)
	if err != nil {
		return fmt.Errorf("client.Schema: %w", err)
	}
	fmt.Fprintf(w, "Got schema: %#v\n", s)
	return nil
}

// [END pubsub_old_version_get_schema]
