// Copyright 2017 The Nomulus Authors. All Rights Reserved.
//
// 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 google.registry.tools;

import static java.nio.charset.StandardCharsets.UTF_8;

import com.beust.jcommander.Parameter;
import com.beust.jcommander.Parameters;
import google.registry.model.SchemaVersion;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;

/** Generates the schema file used for model versioning. */
@Parameters(commandDescription = "Generate a model schema file")
final class GetSchemaCommand implements Command {

  @Parameter(
      names = {"-o", "--out_file"},
      description = "Name of the output file.")
  String outFile;

  @Override
  public void run() throws IOException {
    String schema = SchemaVersion.getSchema();
    if (outFile == null) {
      System.out.println(schema);
    } else {
      File file = new File(outFile);
      file.createNewFile(); // Create the output file if it doesn't already exist.
      Files.write(file.toPath(), schema.getBytes(UTF_8));
    }
  }
}
