/*
    * Copyright 2010 The Kuali Foundation
    *
    * Licensed under the Educational Community 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
    *
    * 	http://www.osedu.org/licenses/ECL-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.kuali.student.contract.writer.service;
  
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  
  import org.kuali.student.contract.model.MessageStructure;
  import org.kuali.student.contract.model.ServiceContractModel;
  import org.kuali.student.contract.model.ServiceMethod;
  import org.kuali.student.contract.model.ServiceMethodParameter;
  import org.kuali.student.contract.model.ServiceMethodReturnValue;
  import org.kuali.student.contract.model.XmlType;
  import org.kuali.student.contract.model.impl.ServiceContractModelPescXsdLoader;
  import org.kuali.student.contract.model.util.ModelFinder;
  import org.kuali.student.contract.model.validation.DictionaryValidationException;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   *
   * @author nwright
   */
  public class PureJavaInfcWriterForOneService {
      
      private static Logger log = LoggerFactory.getLogger(PureJavaInfcWriterForOneService.class);
  
      private ServiceContractModel model;
      private ModelFinder finder;
      private String directory;
      private String rootPackage;
      private String servKey;
  
      public PureJavaInfcWriterForOneService(ServiceContractModel model,
              String directory,
              String rootPackage,
              String servKey) {
          this.model = model;
          this.finder = new ModelFinder(model);
          this.directory = directory;
          this.rootPackage = rootPackage;
          this.servKey = servKey;
      }
  
      /**
       * Write out the entire file
       * @param out
       */
      public void write() {
          List<ServiceMethod> methods = finder.getServiceMethodsInService(servKey);
          if (methods.size() == 0) {
              log.warn("No methods defined for servKey: " + servKey);
              return;
          }
  
          // the main servKey
          log.info("Generating servKeys API's for " + servKey);
          new PureJavaInfcServiceWriter(model, directory, rootPackage, servKey, methods).write();
  
          // the beans's
          log.info("Generating info interfaces");
          for (XmlType xmlType : getXmlTypesUsedJustByService()) {
              log.info("Generating Beans for " + xmlType.getName());
              new PureJavaInfcBeanWriter(model, directory, rootPackage, servKey, xmlType).write();
          }
  
          // the Info interfaces's
          log.info("Generating Info interfaces");
          for (XmlType xmlType : getXmlTypesUsedJustByService()) {
              log.info("Generating info interface for " + xmlType.getName());
              new PureJavaInfcInfcWriter(model, directory, rootPackage, servKey, xmlType).write();
          }
      }
  
      private Set<XmlType> getXmlTypesUsedJustByService() {
          Set<XmlType> set = new HashSet();
          for (XmlType type : model.getXmlTypes()) {
              if (type.getService().equalsIgnoreCase(servKey)) {
                  if (type.getPrimitive().equalsIgnoreCase(XmlType.COMPLEX)) {
                      set.add(type);
                  }
              }
          }
          return set;
      }
 
     private Set<XmlType> getXmlTypesUsedByService(List<ServiceMethod> methods) {
         Set<XmlType> set = new HashSet();
         for (ServiceMethod method : methods) {
             if (method.getReturnValue() != null) {
                 ServiceMethodReturnValue ret = method.getReturnValue();
                 XmlType xmlType = finder.findXmlType(stripListFromType(ret.getType()));
                 if (xmlType == null) {
                     throw new DictionaryValidationException("Method " + method.getService()
                             + "." + method.getName()
                             + "returns an unknown type, "
                             + ret.getType());
                 }
                 addTypeAndAllSubTypes(set, xmlType);
             }
             for (ServiceMethodParameter param : method.getParameters()) {
                 XmlType xmlType = finder.findXmlType(stripListFromType(param.getType()));
                 if (xmlType == null) {
                     throw new DictionaryValidationException("Parameter "
                             + method.getService() + "."
                             + method.getName() + "."
                             + param.getName()
                             + "has an unknown type, "
                             + param.getType());
                 }
                 addTypeAndAllSubTypes(set, xmlType);
             }
         }
         return set;
     }
 
     private void addTypeAndAllSubTypes(Set<XmlType> set, XmlType xmlType) {
         if (xmlType.getPrimitive().equalsIgnoreCase(XmlType.COMPLEX)) {
             if (set.add(xmlType)) {
                 addXmlTypesUsedByMessageStructure(set, xmlType);
             }
         }
     }
 
     private String stripListFromType(String type) {
         if (type.endsWith("List")) {
             type = type.substring(0, type.length() - "List".length());
         }
         return type;
     }
 
     private void addXmlTypesUsedByMessageStructure(Set<XmlType> set,
             XmlType xmlType) {
         ModelFinder finder = new ModelFinder(model);
         for (MessageStructure ms : finder.findMessageStructures(xmlType.getName())) {
             XmlType subType = finder.findXmlType(stripListFromType(ms.getType()));
             if (subType == null) {
                 throw new DictionaryValidationException("MessageStructure field "
                         + ms.getId()
                         + " has an unknown type, "
                         + ms.getType());
             }
             addTypeAndAllSubTypes(set, subType);
         }
     }
 }