/*
    * Themis: Java Project Framework
    * Copyright 2012-2026. Tony Washer
    *
    * 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
    *
    *   http://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 io.github.tonywasher.joceanus.themis.lethe.analysis;
  
  import io.github.tonywasher.joceanus.oceanus.base.OceanusException;
  import io.github.tonywasher.joceanus.themis.exc.ThemisIOException;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Project.
   */
  public class ThemisAnalysisProject
          implements ThemisAnalysisElement {
      /**
       * Consolidation Pass error.
       */
      private static final String CONSOLIDATION_ERROR = "Failed on consolidation Pass";
  
      /**
       * The project name.
       */
      private final String theName;
  
      /**
       * The location.
       */
      private final File theLocation;
  
      /**
       * The module list.
       */
      private final List<ThemisAnalysisModule> theModules;
  
      /**
       * The initial dataMap.
       */
      private final ThemisAnalysisDataMap theDataMap;
  
      /**
       * The error.
       */
      private OceanusException theError;
  
      /**
       * Constructor.
       *
       * @param pLocation the project location
       */
      public ThemisAnalysisProject(final File pLocation) {
          /* Store the name and location */
          theLocation = pLocation;
  
          /* Create the list */
          theModules = new ArrayList<>();
  
          /* Create the dataMap */
          theDataMap = new ThemisAnalysisDataMap();
  
          /* Initiate search for modules */
          final ThemisAnalysisMavenId myId = parseProjectFile(new File(theLocation, ThemisAnalysisMaven.POM));
          theName = myId == null ? null : myId.getArtifactId();
  
          /* InitialPass */
          if (theError == null) {
              performInitialPass();
          }
  
          /* ConsolidationPass */
          if (theError == null) {
              performConsolidationPass();
          }
  
          /* FinalPass */
          if (theError == null) {
              performFinalPass();
          }
      }
  
      /**
      * Obtain the name.
      *
      * @return the name
      */
     public String getName() {
         return theName;
     }
 
     /**
      * Obtain the location.
      *
      * @return the location
      */
     File getLocation() {
         return theLocation;
     }
 
     /**
      * Obtain the error.
      *
      * @return the error
      */
     public OceanusException getError() {
         return theError;
     }
 
     /**
      * Obtain the modules.
      *
      * @return the modules
      */
     public List<ThemisAnalysisModule> getModules() {
         return theModules;
     }
 
     /**
      * Obtain the dataMap.
      *
      * @return the map
      */
     ThemisAnalysisDataMap getDataMap() {
         return theDataMap;
     }
 
     @Override
     public String toString() {
         return theName;
     }
 
     /**
      * Parse the maven top-level project file.
      *
      * @param pPom the project file
      * @return the mavenId of the project
      */
     private ThemisAnalysisMavenId parseProjectFile(final File pPom) {
         /* If the pom file does not exist, just return */
         if (!pPom.exists()) {
             return null;
         }
 
         /* Protect against exceptions */
         try {
             /* Add module if source directory exists */
             final File mySrc = new File(pPom.getParent(), ThemisAnalysisModule.PATH_XTRA);
             if (mySrc.exists()
                     && mySrc.isDirectory()) {
                 /* Add the module to the list */
                 theModules.add(new ThemisAnalysisModule(this, new File(pPom.getParent())));
             }
 
             /* Handle exceptions */
         } catch (OceanusException e) {
             /* Save Exception */
             theError = new ThemisIOException(CONSOLIDATION_ERROR, e);
             return null;
         }
 
         /* Protect against exceptions */
         try (InputStream myInStream = new FileInputStream(pPom)) {
             /* Parse the Project definition file */
             final ThemisAnalysisMaven myPom = new ThemisAnalysisMaven(myInStream);
 
             /* Loop through the modules */
             for (final String myModuleName : myPom.getModules()) {
                 /* Access module directory */
                 final File myModuleDir = new File(pPom.getParentFile(), myModuleName);
 
                 /* Process the project file */
                 parseProjectFile(new File(myModuleDir, ThemisAnalysisMaven.POM));
 
                 /* Break loop on error */
                 if (theError != null) {
                     break;
                 }
             }
 
             return myPom.getMavenId();
 
             /* Catch exceptions */
         } catch (IOException
                  | OceanusException e) {
             /* Save Exception */
             theError = new ThemisIOException("Failed to parse Project file", e);
             return null;
         }
     }
 
     /**
      * initialPass.
      */
     private void performInitialPass() {
         /* Protect against exceptions */
         try {
             /* Loop through the modules */
             for (ThemisAnalysisModule myModule : theModules) {
                 /* Process the module */
                 myModule.performInitialPass();
             }
 
             /* Handle exceptions */
         } catch (OceanusException e) {
             /* Save Exception */
             theError = new ThemisIOException(CONSOLIDATION_ERROR, e);
         }
     }
 
     /**
      * consolidationPass.
      */
     private void performConsolidationPass() {
         /* Protect against exceptions */
         try {
             /* Loop through the modules */
             for (ThemisAnalysisModule myModule : theModules) {
                 /* Process the module */
                 myModule.performConsolidationPass();
             }
 
             /* Handle exceptions */
         } catch (OceanusException e) {
             /* Save Exception */
             theError = new ThemisIOException(CONSOLIDATION_ERROR, e);
         }
     }
 
     /**
      * finalPass.
      */
     private void performFinalPass() {
         /* Protect against exceptions */
         try {
             /* Loop through the modules */
             for (ThemisAnalysisModule myModule : theModules) {
                 /* Process the module */
                 myModule.performFinalPass();
             }
 
             /* Handle exceptions */
         } catch (OceanusException e) {
             /* Save Exception */
             theError = new ThemisIOException("Failed on final pass", e);
         }
     }
 }