/*
    *    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.api.dom.kotlin;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Optional;
  
  public class KotlinFunction extends KotlinNamedItem {
      private final List<KotlinArg> arguments = new ArrayList<>();
      private final List<String> codeLines = new ArrayList<>();
      private final String explicitReturnType;
      private final boolean isOneLineFunction;
  
      private KotlinFunction(Builder builder) {
          super(builder);
          arguments.addAll(builder.arguments);
          codeLines.addAll(builder.codeLines);
          explicitReturnType = builder.explicitReturnType;
          isOneLineFunction = builder.isOneLineFunction;
      }
  
      public void addArgument(KotlinArg argument) {
          arguments.add(argument);
      }
  
      public List<KotlinArg> getArguments() {
          return arguments;
      }
  
      public void addCodeLine(String codeLine) {
          this.codeLines.add(codeLine);
      }
  
      public void addCodeLines(List<String> codeLines) {
          this.codeLines.addAll(codeLines);
      }
  
      public List<String> getCodeLines() {
          return codeLines;
      }
  
      public Optional<String> getExplicitReturnType() {
          return Optional.ofNullable(explicitReturnType);
      }
  
      public boolean isOneLineFunction() {
          return isOneLineFunction;
      }
  
      @Override
      public <R> R accept(KotlinNamedItemVisitor<R> visitor) {
          return visitor.visit(this);
      }
  
      public static Builder newOneLineFunction(String name) {
          return new Builder(name, true);
      }
  
      public static Builder newMultiLineFunction(String name) {
          return new Builder(name, false);
      }
  
      public static class Builder extends AbstractBuilder<Builder> {
          private final boolean isOneLineFunction;
          private final List<KotlinArg> arguments = new ArrayList<>();
          private final List<String> codeLines = new ArrayList<>();
          private String explicitReturnType;
  
          private Builder(String name, boolean isOneLineFunction) {
              super(name);
              this.isOneLineFunction = isOneLineFunction;
          }
  
          public Builder withArgument(KotlinArg argument) {
              arguments.add(argument);
              return this;
          }
  
          public Builder withCodeLine(String codeLine) {
              codeLines.add(codeLine);
              return this;
          }
  
          public Builder withExplicitReturnType(String explicitReturnType) {
              this.explicitReturnType = explicitReturnType;
             return this;
         }
 
         public Builder getThis() {
             return this;
         }
 
         public KotlinFunction build() {
             return new KotlinFunction(this);
         }
     }
 }