/*
    *    Copyright 2006-2025 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.generator.plugins;
  
  import java.util.List;
  
  import org.mybatis.generator.api.IntrospectedColumn;
  import org.mybatis.generator.api.IntrospectedTable;
  import org.mybatis.generator.api.PluginAdapter;
  import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType;
  import org.mybatis.generator.api.dom.java.InnerClass;
  import org.mybatis.generator.api.dom.java.JavaVisibility;
  import org.mybatis.generator.api.dom.java.Method;
  import org.mybatis.generator.api.dom.java.Parameter;
  import org.mybatis.generator.api.dom.java.TopLevelClass;
  import org.mybatis.generator.codegen.mybatis3.MyBatis3FormattingUtilities;
  
  /**
   * This plugin demonstrates adding methods to the example class to enable
   * case-insensitive LIKE searches. It shows how to construct new methods and
   * add them to an existing class.
   *
   * <p>This plugin only adds methods for String fields mapped to a JDBC character
   * type (CHAR, VARCHAR, etc.)
   *
   * @author Jeff Butler
   *
   */
  public class CaseInsensitiveLikePlugin extends PluginAdapter {
  
      public CaseInsensitiveLikePlugin() {
          super();
      }
  
      @Override
      public boolean validate(List<String> warnings) {
          return true;
      }
  
      @Override
      public boolean modelExampleClassGenerated(TopLevelClass topLevelClass,
              IntrospectedTable introspectedTable) {
  
          topLevelClass.getInnerClasses().stream()
          .filter(this::isGeneratedCriteria)
          .findFirst()
          .ifPresent(c -> addMethods(introspectedTable, c));
  
          return true;
      }
  
      private boolean isGeneratedCriteria(InnerClass innerClass) {
          return "GeneratedCriteria".equals(innerClass.getType().getShortName()); //$NON-NLS-1$
      }
  
      private void addMethods(IntrospectedTable introspectedTable, InnerClass criteria) {
          introspectedTable.getNonBLOBColumns().stream()
          .filter(this::isEligibleColumn)
          .map(this::toMethod)
          .forEach(criteria::addMethod);
      }
  
      private boolean isEligibleColumn(IntrospectedColumn introspectedColumn) {
          return introspectedColumn.isJdbcCharacterColumn()
                  && introspectedColumn.isStringColumn();
      }
  
      private Method toMethod(IntrospectedColumn introspectedColumn) {
          StringBuilder sb = new StringBuilder();
          sb.append(introspectedColumn.getJavaProperty());
          sb.setCharAt(0, Character.toUpperCase(sb.charAt(0)));
          sb.insert(0, "and"); //$NON-NLS-1$
          sb.append("LikeInsensitive"); //$NON-NLS-1$
          Method method = new Method(sb.toString());
          method.setVisibility(JavaVisibility.PUBLIC);
          method.addParameter(new Parameter(introspectedColumn
                  .getFullyQualifiedJavaType(), "value")); //$NON-NLS-1$
  
          method.setReturnType(FullyQualifiedJavaType.getCriteriaInstance());
  
          sb.setLength(0);
          sb.append("addCriterion(\"upper("); //$NON-NLS-1$
          sb.append(MyBatis3FormattingUtilities
                  .getAliasedActualColumnName(introspectedColumn));
          sb.append(") like\", value.toUpperCase(), \""); //$NON-NLS-1$
          sb.append(introspectedColumn.getJavaProperty());
         sb.append("\");"); //$NON-NLS-1$
         method.addBodyLine(sb.toString());
         method.addBodyLine("return (Criteria) this;"); //$NON-NLS-1$
         return method;
     }
 }