package at.rseiler.spbee.core.pojo;
   
   import at.rseiler.spbee.core.annotation.MappingConstructor;
   import at.rseiler.spbee.core.annotation.ReturnNull;
   import at.rseiler.spbee.core.annotation.RowMapper;
   import at.rseiler.spbee.core.annotation.StoredProcedure;
   import at.rseiler.spbee.core.pojo.annotation.MappingConstructorData;
   import at.rseiler.spbee.core.pojo.annotation.RowMapperData;
   import at.rseiler.spbee.core.pojo.annotation.StoredProcedureData;
  import at.rseiler.spbee.core.util.ElementConverter;
  import at.rseiler.spbee.core.util.StringUtil;
  
  import javax.lang.model.element.AnnotationMirror;
  import javax.lang.model.element.AnnotationValue;
  import javax.lang.model.element.ExecutableElement;
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.Map.Entry;
  
  /**
   * Represents a stored procedure method.
   *
   * @author Reinhard Seiler {@literal <rseiler.developer@gmail.com>}
   */
  public class StoredProcedureMethod implements Serializable {
  
      private static final long serialVersionUID = 3118412026258156516L;
  
      private String qualifiedDtoClassName;
      private String methodName;
      private TypeInfo returnTypeInfo;
      private List<AnnotationInfo> annotations = new ArrayList<>();
      private boolean returnNull;
      private StoredProcedureData storedProcedure;
      private RowMapperData rowMapper;
      private MappingConstructorData mappingConstructor;
      private List<Variable> arguments = new LinkedList<>();
  
      private StoredProcedureMethod() {
      }
  
      /**
       * Adds a variable to the stored procedure method.
       *
       * @param argument the argument of the method
       * @return returns itself
       */
      public StoredProcedureMethod addArgument(Variable argument) {
          arguments.add(argument);
          return this;
      }
  
      /**
       * Returns if null should be used instead of throwing an exception if an entity is expected but nothing is returned
       * from the database.
       *
       * @return true if null should be used as return value
       */
      public boolean useNullInsteadOfAnException() {
          return returnNull;
      }
  
      /**
       * The qualified class name of the stored procedure method.
       *
       * @return the qualified class name
       */
      public String getQualifiedClassName() {
          StringBuilder sb = new StringBuilder(storedProcedure.getName());
  
          if (mappingConstructor != null) {
              String name = StringUtil.transformToJavaClassName(mappingConstructor.getName());
              sb.append("With").append(name);
          }
  
          if (rowMapper != null) {
              String name = StringUtil.getSimpleClassName(rowMapper.getType());
              sb.append("With").append(name);
          }
  
          String spClassName = StringUtil.transformToJavaClassName(sb.toString());
          String spPackage = StringUtil.getPackage(qualifiedDtoClassName);
          return StringUtil.getQualifiedStoredProcedureClassName(spPackage, spClassName);
      }
  
      /**
       * The package of the of the stored procedure method.
       *
       * @return the package
       */
      public String getPackage() {
          return StringUtil.getPackage(getQualifiedClassName());
      }
  
      /**
       * The simple class name.
       *
      * @return simple class name
      */
     public String getSimpleClassName() {
         String spName = StringUtil.transformToJavaClassName(getStoredProcedureName());
         StringBuilder sb = new StringBuilder(spName);
 
         if (mappingConstructor != null) {
             String name = StringUtil.transformToJavaClassName(mappingConstructor.getName());
             sb.append("With").append(name);
         }
 
         if (rowMapper != null) {
             String name = StringUtil.getSimpleClassName(rowMapper.getType());
             sb.append("With").append(name);
         }
 
         return sb.toString();
     }
 
     /**
      * The @StoredProcedure annotation.
      *
      * @return the @StoredProcedure annotation
      */
     public String getStoredProcedureName() {
         return storedProcedure.getName();
     }
 
     /**
      * Generates the name of the variable name which should be used for the DTO class.
      *
      * @return the field name
      */
     public String getDtoFieldName() {
         return StringUtil.firstCharToLowerCase(getSimpleClassName());
     }
 
     /**
      * The method name.
      *
      * @return method name
      */
     public String getMethodName() {
         return methodName;
     }
 
     /**
      * The TypeInfo of the return value of the stored procedure method.;
      *
      * @return the TypeInfo
      */
     public TypeInfo getReturnTypeInfo() {
         return returnTypeInfo;
     }
 
     /**
      * The arguments of the stored procedure method.
      *
      * @return the arguments
      */
     public List<Variable> getArguments() {
         return arguments;
     }
 
     /**
      * Returns the qualified class name of the RowMapper.
      *
      * @return the qualified class name
      */
     public String getQualifiedRowMapperClass() {
         if (rowMapper != null) {
             return rowMapper.getType();
         }
 
         String name = mappingConstructor != null ? mappingConstructor.getName() : "Default";
         String returnType = returnTypeInfo.getGenericType().orElse(returnTypeInfo.getType());
         return StringUtil.getQualifiedMapperClassName(returnType, name);
     }
 
     /**
      * The annotations of the stored procedure method.
      *
      * @return the annotations
      */
     public List<AnnotationInfo> getAnnotations() {
         return annotations;
     }
 
     @Override
     public String toString() {
         return "StoredProcedureMethod{" +
                 "qualifiedDtoClassName='" + qualifiedDtoClassName + '\'' +
                 ", annotations=" + annotations +
                 ", storedProcedure=" + storedProcedure +
                 ", rowMapper=" + rowMapper +
                 ", returnNull=" + returnNull +
                 ", mappingConstructor=" + mappingConstructor +
                 ", methodName='" + methodName + '\'' +
                 ", returnTypeInfo=" + returnTypeInfo +
                 ", arguments=" + arguments +
                 '}';
     }
 
     public static class Builder {
 
         private final StoredProcedureMethod storedProcedureMethod;
 
         public Builder() {
             this.storedProcedureMethod = new StoredProcedureMethod();
         }
 
         public Builder dtoClassName(String dtoClassName) {
             storedProcedureMethod.qualifiedDtoClassName = dtoClassName;
             return this;
         }
 
         public Builder methodName(String methodName) {
             storedProcedureMethod.methodName = methodName;
             return this;
         }
 
         public Builder returnTypeInfo(TypeInfo returnTypeInfo) {
             storedProcedureMethod.returnTypeInfo = returnTypeInfo;
             return this;
         }
 
         public Builder annotations(List<AnnotationMirror> annotations) {
             List<AnnotationInfo> annotationInfos = new LinkedList<>();
 
             for (AnnotationMirror annotation : annotations) {
                 AnnotationInfo annotationInfo = new AnnotationInfo(annotation.getAnnotationType().toString());
 
                 for (Entry<? extends ExecutableElement, ? extends AnnotationValue> entry : annotation.getElementValues().entrySet()) {
                     String simpleName = entry.getKey().getSimpleName().toString();
                     Object value = entry.getValue().getValue();
                     String type = entry.getValue().toString();
                     annotationInfo.addAnnotationValueInfo(ElementConverter.convert(simpleName, value, type));
                 }
 
                 annotationInfos.add(annotationInfo);
             }
 
             storedProcedureMethod.annotations = annotationInfos;
             return this;
         }
 
         public Builder annotationInfos(List<AnnotationInfo> annotations) {
             storedProcedureMethod.annotations = annotations;
             return this;
         }
 
         public Builder storedProcedure(StoredProcedure storedProcedure) {
             storedProcedureMethod.storedProcedure = new StoredProcedureData(storedProcedure);
             return this;
         }
 
         public Builder rowMapper(RowMapper rowMapper) {
             storedProcedureMethod.rowMapper = rowMapper != null ? new RowMapperData(rowMapper) : null;
             return this;
         }
 
         public Builder returnNull(ReturnNull returnNull) {
             storedProcedureMethod.returnNull = returnNull != null;
             return this;
         }
 
         public Builder mappingConstructor(MappingConstructor mappingConstructor) {
             storedProcedureMethod.mappingConstructor = mappingConstructor != null ? new MappingConstructorData(mappingConstructor) : null;
             return this;
         }
 
         public StoredProcedureMethod build() {
             return storedProcedureMethod;
         }
 
     }
 
 }