/*
    *    Copyright 2016-2025 the original author or 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
    *
    *       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 org.mybatis.dynamic.sql;
  
  import java.util.Objects;
  import java.util.Optional;
  
  import org.jspecify.annotations.Nullable;
  import org.mybatis.dynamic.sql.render.RenderingContext;
  import org.mybatis.dynamic.sql.select.SelectModel;
  import org.mybatis.dynamic.sql.select.render.SubQueryRenderer;
  import org.mybatis.dynamic.sql.util.FragmentAndParameters;
  
  public class SubQueryColumn implements BasicColumn {
      private final SelectModel selectModel;
      private @Nullable String alias;
  
      private SubQueryColumn(SelectModel selectModel) {
          this.selectModel = Objects.requireNonNull(selectModel);
      }
  
      @Override
      public Optional<String> alias() {
          return Optional.ofNullable(alias);
      }
  
      @Override
      public SubQueryColumn as(String alias) {
          SubQueryColumn answer = new SubQueryColumn(selectModel);
          answer.alias = alias;
          return answer;
      }
  
      @Override
      public FragmentAndParameters render(RenderingContext renderingContext) {
          return SubQueryRenderer.withSelectModel(selectModel)
                  .withRenderingContext(renderingContext)
                  .withPrefix("(") //$NON-NLS-1$
                  .withSuffix(")") //$NON-NLS-1$
                  .build()
                  .render();
      }
  
      public static SubQueryColumn of(SelectModel selectModel) {
          return new SubQueryColumn(selectModel);
      }
  }