/*
    *    Copyright 2006-2023 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.generator.runtime.dynamic.sql.elements;
  
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.mybatis.generator.api.IntrospectedColumn;
  import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
  import org.mybatis.generator.api.dom.java.Interface;
  import org.mybatis.generator.api.dom.java.Method;
  import org.mybatis.generator.api.dom.java.Parameter;
  import org.mybatis.generator.codegen.mybatis3.ListUtilities;
  
  public class InsertMultipleMethodGenerator extends AbstractMethodGenerator {
      private final FullyQualifiedJavaType recordType;
  
      private InsertMultipleMethodGenerator(Builder builder) {
          super(builder);
          recordType = builder.recordType;
      }
  
      @Override
      public MethodAndImports generateMethodAndImports() {
          if (!Utils.generateMultipleRowInsert(introspectedTable)) {
              return null;
          }
  
          Set<FullyQualifiedJavaType> imports = new HashSet<>();
  
          imports.add(new FullyQualifiedJavaType("org.mybatis.dynamic.sql.util.mybatis3.MyBatis3Utils")); //$NON-NLS-1$
          imports.add(recordType);
  
          Method method = new Method("insertMultiple"); //$NON-NLS-1$
          method.setDefault(true);
          context.getCommentGenerator().addGeneralMethodAnnotation(method, introspectedTable, imports);
          method.setReturnType(FullyQualifiedJavaType.getIntInstance());
  
          FullyQualifiedJavaType parameterType = new FullyQualifiedJavaType("java.util.Collection"); //$NON-NLS-1$
          parameterType.addTypeArgument(recordType);
          imports.add(parameterType);
  
          method.addParameter(new Parameter(parameterType, "records")); //$NON-NLS-1$
  
          String methodName;
          if (Utils.canRetrieveMultiRowGeneratedKeys(introspectedTable)) {
              methodName = "MyBatis3Utils.insertMultipleWithGeneratedKeys";
          } else {
              methodName = "MyBatis3Utils.insertMultiple";
          }
  
          method.addBodyLine("return " + methodName + "(this::insertMultiple, records, " //$NON-NLS-1$ //$NON-NLS-2$
                  + tableFieldName // $NON-NLS-1$
                  + ", c ->"); //$NON-NLS-1$
  
          List<IntrospectedColumn> columns =
                  ListUtilities.removeIdentityAndGeneratedAlwaysColumns(introspectedTable.getAllColumns());
          boolean first = true;
          for (IntrospectedColumn column : columns) {
              String fieldName = calculateFieldName(column);
  
              if (first) {
                  method.addBodyLine("    c.map(" + fieldName //$NON-NLS-1$
                          + ").toProperty(\"" + column.getJavaProperty() //$NON-NLS-1$
                          + "\")"); //$NON-NLS-1$
                  first = false;
              } else {
                  method.addBodyLine("    .map(" + fieldName //$NON-NLS-1$
                          + ").toProperty(\"" + column.getJavaProperty() //$NON-NLS-1$
                          + "\")"); //$NON-NLS-1$
              }
          }
  
          method.addBodyLine(");"); //$NON-NLS-1$
  
          return MethodAndImports.withMethod(method)
                  .withImports(imports)
                  .build();
      }
  
      @Override
      public boolean callPlugins(Method method, Interface interfaze) {
          return context.getPlugins().clientInsertMultipleMethodGenerated(method, interfaze, introspectedTable);
      }
  
     public static class Builder extends BaseBuilder<Builder> {
         private FullyQualifiedJavaType recordType;
 
         public Builder withRecordType(FullyQualifiedJavaType recordType) {
             this.recordType = recordType;
             return this;
         }
 
         @Override
         public Builder getThis() {
             return this;
         }
 
         public InsertMultipleMethodGenerator build() {
             return new InsertMultipleMethodGenerator(this);
         }
     }
 }