/**
    * Copyright 2004-2014 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.opensource.org/licenses/ecl2.php
    *
   * 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.remote.impl.mojo;
  
  import java.util.ArrayList;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  import java.util.Stack;
  import org.kuali.rice.core.api.criteria.Predicate;
  import org.kuali.rice.core.api.criteria.PredicateFactory;
  import org.kuali.rice.core.api.criteria.QueryByCriteria;
  import org.kuali.student.admin.ui.mojo.AdminUiLookupableWriter;
  import org.kuali.student.contract.model.MessageStructure;
  import org.kuali.student.contract.model.Service;
  
  import org.kuali.student.contract.model.ServiceContractModel;
  import org.kuali.student.contract.model.ServiceMethod;
  import org.kuali.student.contract.model.ServiceMethodError;
  import org.kuali.student.contract.model.ServiceMethodParameter;
  import org.kuali.student.contract.model.XmlType;
  import org.kuali.student.contract.model.util.ModelFinder;
  import org.kuali.student.contract.writer.JavaClassWriter;
  import org.kuali.student.contract.writer.service.GetterSetterNameCalculator;
  import org.kuali.student.contract.writer.service.MessageStructureTypeCalculator;
  import org.kuali.student.contract.writer.service.ServiceExceptionWriter;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   *
   * @author nwright
   */
  public class RemoteImplServiceTestWriter extends JavaClassWriter {
  
      private static final Logger log = LoggerFactory.getLogger(RemoteImplServiceTestWriter.class);
      private ServiceContractModel model;
      private ModelFinder finder;
      private String directory;
      private String rootPackage;
      private String servKey;
      private List<ServiceMethod> methods;
      private Service service;
  
      public RemoteImplServiceTestWriter(ServiceContractModel model,
              String directory,
              String rootPackage,
              String servKey,
              List<ServiceMethod> methods) {
          super(directory + "/test/java", calcPackage(servKey, rootPackage), calcClassName(servKey));
          this.model = model;
          this.finder = new ModelFinder(model);
          this.directory = directory;
          this.rootPackage = rootPackage;
          this.servKey = servKey;
          this.service = finder.findService(servKey);
          this.methods = methods;
      }
  
      public static String calcPackage(String servKey, String rootPackage) {
  //        String pack = rootPackage + "." + servKey.toLowerCase() + ".";
  //  StringBuffer buf = new StringBuffer (service.getVersion ().length ());
  //  for (int i = 0; i < service.getVersion ().length (); i ++)
  //  {
  //   char c = service.getVersion ().charAt (i);
  //   c = Character.toLowerCase (c);
  //   if (Character.isLetter (c))
  //   {
  //    buf.append (c);
  //    continue;
  //   }
  //   if (Character.isDigit (c))
  //   {
  //    buf.append (c);
  //   }
  //  }
  //  pack = pack + buf.toString ();
  //        pack = pack + "service.decorators";
  //        return pack;
          return rootPackage;
      }
  
      public static String calcClassName(String servKey) {
          String name = GetterSetterNameCalculator.calcInitUpper(servKey + "ServiceRemoteImplTest");
          if (name.startsWith("RICE.")) {
              name = name.substring("RICE.".length());
         }
         return name;
     }
 
     private static enum MethodType {
 
         VALIDATE, CREATE, UPDATE
     };
 
     private MethodType calcMethodType(ServiceMethod method) {
         if (method.getName().startsWith("validate")) {
             return MethodType.VALIDATE;
         }
         if (method.getName().startsWith("create")) {
             return MethodType.CREATE;
         }
         if (method.getName().startsWith("update")) {
             return MethodType.UPDATE;
         }
         return null;
     }
 
     /**
      * Write out the entire file
      *
      * @param out
      */
     public void write() {
         String serviceName = service.getName();
         indentPrintln("//@Ignore");
         indentPrintln("public class " + calcClassName(servKey));
         // TODO: figure out how to add import for the decorator
         openBrace();
         importsAdd("org.junit.*");
         XmlType contextInfo = finder.findXmlType("contextInfo");
         importsAdd(contextInfo.getJavaPackage() + "." + contextInfo.getName());
         indentPrintln("private static ContextInfo contextInfo;");
 
         indentPrintln("private static " + serviceName + "RemoteImpl service;");
         indentPrintln("");
         indentPrintln("");
         indentPrintln("@BeforeClass");
         indentPrintln("public static void setUpClass() throws Exception");
         openBrace();
         indentPrintln("service = new " + serviceName + "RemoteImpl();");
         indentPrintln("service.setHostUrl(RemoteServiceConstants.ENV2_URL);");
         indentPrintln("//service.setHostUrl(RemoteServiceConstants.LOCAL_HOST_EMBEDDED_URL);");
         indentPrintln("contextInfo = new ContextInfo();");
         indentPrintln("contextInfo.setPrincipalId(\"TESTUSER\");");
         closeBrace();
         indentPrintln("");
         indentPrintln("@AfterClass");
         indentPrintln("public static void tearDownClass() throws Exception");
         openBrace();
         closeBrace();
         indentPrintln("");
         indentPrintln("@Before");
         indentPrintln("public void setUp()");
         openBrace();
         closeBrace();
         indentPrintln("");
         indentPrintln("@After");
         indentPrintln("public void tearDown()");
         openBrace();
         closeBrace();
         indentPrintln("");
 
 
         Set<XmlType> types = this.getMainXmlTypesUsedByService(methods);
         if (types.isEmpty()) {
             log.warn("No types defined for servKey: " + servKey);
             return;
         }
         // the main servKey
         log.info("Generating search by criteria tests for " + types.size() + " in " + servKey);
         for (XmlType type : types) {
             this.writeTestMethodsForXmlType(type);
         }
         closeBrace();
 
         this.writeJavaClassAndImportsOutToFile();
         this.getOut().close();
     }
 
     private void writeTestMethodsForXmlType(XmlType xmlType) {
         ServiceMethod searchMethod = AdminUiLookupableWriter.findSearchMethod(xmlType, methods);
         if (searchMethod == null) {
             log.warn("No search method found for " + this.servKey + "." + xmlType.getName());
             return;
 //            throw new NullPointerException (this.servKey + "." + xmlType.getName());
         }
         String infoClass = GetterSetterNameCalculator.calcInitUpper(xmlType.getName());
         importsAdd(xmlType.getJavaPackage() + "." + xmlType.getName());
         indentPrintln("");
         indentPrintln("@Test");
         indentPrintln("public void testSearch" + infoClass + "All () throws Exception");
         openBrace();
         importsAdd(QueryByCriteria.class.getName());
         importsAdd(Predicate.class.getName());
         importsAdd(PredicateFactory.class.getName());
         indentPrintln("QueryByCriteria.Builder qBuilder = QueryByCriteria.Builder.create();");
         indentPrintln("qBuilder.setMaxResults (30);");
         importsAdd(List.class.getName());
         String returnType = "List<" + infoClass + ">";
         if (searchMethod.getReturnValue().getType().endsWith("QueryResults")) {
             returnType = searchMethod.getReturnValue().getType();
             XmlType returnXmlType = finder.findXmlType(returnType);
             importsAdd (returnXmlType.getJavaPackage() + "." + returnType);
         }
         indentPrint(returnType + " infos = service." + searchMethod.getName());
         String comma = "(";
         for (ServiceMethodParameter param : searchMethod.getParameters()) {
             print(comma);
             comma = ", ";
             if (param.getType().equals("QueryByCriteria")) {
                 print("qBuilder.build()");
                 continue;
             }
             if (param.getType().equals("ContextInfo")) {
                 print("contextInfo");
                 continue;
             }
             log.warn(servKey + "." + searchMethod.getName() + " param=" + param.getName() + " " + param.getType() + " cannot be specified in search");
         }
         println(");");
         closeBrace();
 
 
         indentPrintln("");
         indentPrintln("@Test");
         indentPrintln("public void testSearch" + infoClass + "KeywordSearch () throws Exception");
         openBrace();
         importsAdd(QueryByCriteria.class.getName());
         importsAdd(Predicate.class.getName());
         importsAdd(PredicateFactory.class.getName());
         indentPrintln("QueryByCriteria.Builder qBuilder = QueryByCriteria.Builder.create();");
         importsAdd(ArrayList.class.getName());
         indentPrintln("List<Predicate> pList = new ArrayList<Predicate>();");
         indentPrintln("pList.add(PredicateFactory.equal(\"keywordSearch\", \"xyzzysomethingnothingmatches\"));");
         indentPrintln("qBuilder.setPredicates(PredicateFactory.and(pList.toArray(new Predicate[pList.size()])));");
         indentPrintln("qBuilder.setMaxResults (30);");
         importsAdd(List.class.getName());
         indentPrint(returnType + " infos = service." + searchMethod.getName());
         comma = "(";
         for (ServiceMethodParameter param : searchMethod.getParameters()) {
             print(comma);
             comma = ", ";
             if (param.getType().equals("QueryByCriteria")) {
                 print("qBuilder.build()");
                 continue;
             }
             if (param.getType().equals("ContextInfo")) {
                 print("contextInfo");
                 continue;
             }
             log.warn(servKey + "." + searchMethod.getName() + " param=" + param.getName() + " " + param.getType() + " cannot be specified in search");
         }
         println(");");
         closeBrace();
 
         this.writeFieldTests(infoClass, returnType, searchMethod, xmlType, new Stack<XmlType>(), "");
     }
 
     private void writeFieldTests(String infoClass, String returnType, ServiceMethod searchMethod, XmlType type, Stack<XmlType> parents, String prefix) {
         // avoid recursion
         if (parents.contains(type)) {
             return;
         }
         parents.push(type);
         for (MessageStructure ms : finder.findMessageStructures(type.getName())) {
             String fieldName = GetterSetterNameCalculator.calcInitLower(ms.getShortName());
             if (!prefix.isEmpty()) {
                 fieldName = prefix + "." + fieldName;
             }
             String fieldNameCamel = GetterSetterNameCalculator.dot2Camel(fieldName);
             if (ms.getShortName().equalsIgnoreCase("versionInd")) {
                 indentPrintln("// TODO: deal with seaching on the version indicator which is a string in the contract but a number in the database");
                 continue;
             }
             if (ms.getType().equalsIgnoreCase("AttributeInfoList")) {
                 indentPrintln("// TODO: deal with dynamic attributes");
                 continue;
             }
             if (ms.getType().endsWith("List")) {
                 indentPrintln("// TODO: deal with  " + fieldName + " which is a List");
                 continue;
             }
             XmlType fieldType = finder.findXmlType(ms.getType());
             if (fieldType.getPrimitive().equalsIgnoreCase(XmlType.COMPLEX)) {
                 // complex sub-types such as rich text 
                 this.writeFieldTests(infoClass, returnType, searchMethod, fieldType, parents, fieldName);
                 continue;
             }
             if (!ms.getType().equalsIgnoreCase("String")) {
                 indentPrintln("// TODO: deal with  " + fieldName + " which is a " + ms.getType());
                 continue;
             }
 
             indentPrintln("");
             indentPrintln("@Test");
             indentPrintln("public void testSearch" + infoClass + "By" + fieldNameCamel + " () throws Exception");
             openBrace();
             indentPrintln("QueryByCriteria.Builder qBuilder = QueryByCriteria.Builder.create();");
             indentPrintln("List<Predicate> pList = new ArrayList<Predicate>();");
             indentPrintln("pList.add(PredicateFactory.equal(\"" + fieldName + "\", \"xyzzysomethingnothingmatches\"));");
             indentPrintln("qBuilder.setPredicates(PredicateFactory.and(pList.toArray(new Predicate[pList.size()])));");
             indentPrintln("qBuilder.setMaxResults (30);");
             indentPrint(returnType + " infos = service." + searchMethod.getName());
             String comma = "(";
             for (ServiceMethodParameter param : searchMethod.getParameters()) {
                 print(comma);
                 comma = ", ";
                 if (param.getType().equals("QueryByCriteria")) {
                     print("qBuilder.build()");
                     continue;
                 }
                 if (param.getType().equals("ContextInfo")) {
                     print("contextInfo");
                     continue;
                 }
                 log.warn(servKey + "." + searchMethod.getName() + " param=" + param.getName() + " " + param.getType() + " cannot be specified in search");
             }
             println(");");
             closeBrace();
 
         }
         parents.pop();
     }
 
     private String calcType(String type, String realType) {
         XmlType t = finder.findXmlType(this.stripList(type));
         return MessageStructureTypeCalculator.calculate(this, model, type, realType,
                 t.getJavaPackage());
     }
 
     private String stripList(String str) {
         return GetterSetterNameCalculator.stripList(str);
     }
 
     private String calcExceptionClassName(ServiceMethodError error) {
         if (error.getClassName() == null) {
             return ServiceExceptionWriter.calcClassName(error.getType());
         }
         return error.getClassName();
     }
 
     private String calcExceptionPackageName(ServiceMethodError error) {
         if (error.getClassName() == null) {
             return ServiceExceptionWriter.calcPackage(rootPackage);
         }
         return error.getPackageName();
     }
 
     private Set<XmlType> getMainXmlTypesUsedByService(List<ServiceMethod> methods) {
         Set<XmlType> set = new HashSet();
         for (ServiceMethod method : methods) {
             if (method.getReturnValue().getType().endsWith("List")) {
                 continue;
             }
             XmlType returnType = finder.findXmlType(method.getReturnValue().getType());
             if (returnType == null) {
                 continue;
             }
             if (!returnType.getPrimitive().equalsIgnoreCase(XmlType.COMPLEX)) {
                 continue;
             }
             // TYPE only should show up on type service
             if (returnType.getName().equalsIgnoreCase("TypeInfo")) {
                 if (!servKey.equalsIgnoreCase("type")) {
                     continue;
                 }
             }
             // State only should show up on type service
             if (returnType.getName().equalsIgnoreCase("StateInfo")) {
                 if (!servKey.equalsIgnoreCase("state")) {
                     continue;
                 }
             }
 //            if (method.getName().startsWith("create")) {
 //                set.add(returnType);
 //                continue;
 //            }
 //            if (method.getName().startsWith("update")) {
 //                set.add(returnType);
 //                continue;
 //            }
             // presume a get with a single parameter is getting by primary key
             if (method.getName().startsWith("get")) {
                 List<ServiceMethodParameter> params = this.getNonContextParameters(method.getParameters());
                 if (params.size() == 1) {
                     if (params.get(0).getType().equalsIgnoreCase("String")) {
                         set.add(returnType);
                         continue;
                     }
                 }
             }
         }
         return set;
     }
 
     
     private List<ServiceMethodParameter>  getNonContextParameters (List <ServiceMethodParameter> params) {
          List<ServiceMethodParameter> list = new ArrayList<ServiceMethodParameter> ();
          for (ServiceMethodParameter param : params) {
              if (param.getType().equalsIgnoreCase("ContextInfo")) {
                  continue;
              }
              list.add (param);
          }
          return list;
     }
     private List<MessageStructure> getFieldsToSearchOn(XmlType xmlType) {
         List<MessageStructure> list = new ArrayList<MessageStructure>();
         for (MessageStructure ms : finder.findMessageStructures(xmlType.getName())) {
             XmlType msType = finder.findXmlType(ms.getType());
             // TODO: dive down into complex sub-types 
             if (msType.getPrimitive().equalsIgnoreCase(XmlType.COMPLEX)) {
                 continue;
             }
             list.add(ms);
         }
         return list;
     }
 }