/*
    *    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.insert;
  
  import java.util.Arrays;
  import java.util.List;
  import java.util.Objects;
  import java.util.function.Consumer;
  
  import org.jspecify.annotations.Nullable;
  import org.mybatis.dynamic.sql.SqlColumn;
  import org.mybatis.dynamic.sql.SqlTable;
  import org.mybatis.dynamic.sql.configuration.StatementConfiguration;
  import org.mybatis.dynamic.sql.select.SelectModel;
  import org.mybatis.dynamic.sql.util.Buildable;
  import org.mybatis.dynamic.sql.util.ConfigurableStatement;
  
  public class InsertSelectDSL implements Buildable<InsertSelectModel>, ConfigurableStatement<InsertSelectDSL> {
  
      private final SqlTable table;
      private final @Nullable InsertColumnListModel columnList;
      private final SelectModel selectModel;
      private final StatementConfiguration statementConfiguration = new StatementConfiguration();
  
      private InsertSelectDSL(SqlTable table, InsertColumnListModel columnList, SelectModel selectModel) {
          this.table = Objects.requireNonNull(table);
          this.selectModel = Objects.requireNonNull(selectModel);
          this.columnList = columnList;
      }
  
      private InsertSelectDSL(SqlTable table, SelectModel selectModel) {
          this.table = Objects.requireNonNull(table);
          this.selectModel = Objects.requireNonNull(selectModel);
          this.columnList = null;
      }
  
      @Override
      public InsertSelectModel build() {
          return InsertSelectModel.withTable(table)
                  .withColumnList(columnList)
                  .withSelectModel(selectModel)
                  .withStatementConfiguration(statementConfiguration)
                  .build();
      }
  
      public static InsertColumnGatherer insertInto(SqlTable table) {
          return new InsertColumnGatherer(table);
      }
  
      @Override
      public InsertSelectDSL configureStatement(Consumer<StatementConfiguration> consumer) {
          consumer.accept(statementConfiguration);
          return this;
      }
  
      public static class InsertColumnGatherer {
          private final SqlTable table;
  
          private InsertColumnGatherer(SqlTable table) {
              this.table = table;
          }
  
          public SelectGatherer withColumnList(SqlColumn<?>... columns) {
              return withColumnList(Arrays.asList(columns));
          }
  
          public SelectGatherer withColumnList(List<SqlColumn<?>> columns) {
              return new SelectGatherer(table, columns);
          }
  
          public InsertSelectDSL withSelectStatement(Buildable<SelectModel> selectModelBuilder) {
              return new InsertSelectDSL(table, selectModelBuilder.build());
          }
      }
  
      public static class SelectGatherer {
          private final SqlTable table;
          private final InsertColumnListModel columnList;
  
          private SelectGatherer(SqlTable table, List<SqlColumn<?>> columns) {
              this.table = table;
              columnList = InsertColumnListModel.of(columns);
          }
  
          public InsertSelectDSL withSelectStatement(Buildable<SelectModel> selectModelBuilder) {
              return new InsertSelectDSL(table, columnList, selectModelBuilder.build());
         }
     }
 }