/*
    *    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.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  import java.util.Objects;
  import java.util.stream.Stream;
  
  import org.jspecify.annotations.Nullable;
  import org.mybatis.dynamic.sql.SqlTable;
  import org.mybatis.dynamic.sql.util.AbstractColumnMapping;
  
  public abstract class AbstractMultiRowInsertModel<T> {
      private final SqlTable table;
      private final List<T> records;
      protected final List<AbstractColumnMapping> columnMappings;
  
      protected AbstractMultiRowInsertModel(AbstractBuilder<T, ?> builder) {
          table = Objects.requireNonNull(builder.table);
          records = Collections.unmodifiableList(Objects.requireNonNull(builder.records));
          columnMappings = Objects.requireNonNull(builder.columnMappings);
      }
  
      public Stream<AbstractColumnMapping> columnMappings() {
          return columnMappings.stream();
      }
  
      public List<T> records() {
          return records;
      }
  
      public SqlTable table() {
          return table;
      }
  
      public int recordCount() {
          return records.size();
      }
  
      public abstract static class AbstractBuilder<T, S extends AbstractBuilder<T, S>> {
          private @Nullable SqlTable table;
          private final List<T> records = new ArrayList<>();
          private final List<AbstractColumnMapping> columnMappings = new ArrayList<>();
  
          public S withTable(SqlTable table) {
              this.table = table;
              return getThis();
          }
  
          public S withRecords(Collection<T> records) {
              this.records.addAll(records);
              return getThis();
          }
  
          public S withColumnMappings(List<AbstractColumnMapping> columnMappings) {
              this.columnMappings.addAll(columnMappings);
              return getThis();
          }
  
          protected abstract S getThis();
      }
  }