/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.maven.model;
  
  import java.util.stream.Collectors;
  
  /**
   * Class InputLocation.
   *
   * @version $Revision$ $Date$
   */
  @SuppressWarnings("all")
  public final class InputLocation implements java.io.Serializable, Cloneable, InputLocationTracker {
  
      // --------------------------/
      // - Class/Member Variables -/
      // --------------------------/
  
      /**
       * The one-based line number. The value will be non-positive if
       * unknown.
       */
      private int lineNumber = -1;
  
      /**
       * The one-based column number. The value will be non-positive
       * if unknown.
       */
      private int columnNumber = -1;
  
      /**
       * Field source.
       */
      private InputSource source;
  
      /**
       * Field locations.
       */
      private java.util.Map<Object, InputLocation> locations;
  
      /**
       * Field location.
       */
      private InputLocation location;
  
      /**
       * Field importedFrom.
       */
      private InputLocation importedFrom;
  
      /**
       * Cached hashCode for performance.
       */
      private volatile int hashCode = 0;
  
      // ----------------/
      // - Constructors -/
      // ----------------/
  
      /**
       * Creates a new InputLocation from an API model InputLocation.
       * This constructor is used for converting between the API model and the compat model.
       *
       * @param location the API model InputLocation to convert from
       */
      public InputLocation(org.apache.maven.api.model.InputLocation location) {
          this.lineNumber = location.getLineNumber();
          this.columnNumber = location.getColumnNumber();
          this.source = location.getSource() != null ? new InputSource(location.getSource()) : null;
          this.locations = location.getLocations().isEmpty()
                  ? null
                  : location.getLocations().entrySet().stream()
                          .collect(Collectors.toMap(
                                  e -> e.getKey(),
                                  e -> e.getValue() == location ? this : new InputLocation(e.getValue())));
          this.importedFrom = location.getImportedFrom() != null ? new InputLocation(location.getImportedFrom()) : null;
      }
  
      public InputLocation(int lineNumber, int columnNumber) {
          this.lineNumber = lineNumber;
          this.columnNumber = columnNumber;
      } // -- org.apache.maven.model.InputLocation(int, int)
  
     public InputLocation(int lineNumber, int columnNumber, InputSource source) {
         this.lineNumber = lineNumber;
         this.columnNumber = columnNumber;
         this.source = source;
     } // -- org.apache.maven.model.InputLocation(int, int, InputSource)
 
     // -----------/
     // - Methods -/
     // -----------/
 
     /**
      * Method clone.
      *
      * @return InputLocation
      */
     public InputLocation clone() {
         try {
             InputLocation copy = (InputLocation) super.clone();
 
             if (copy.locations != null) {
                 copy.locations = new java.util.LinkedHashMap(copy.locations);
             }
 
             return copy;
         } catch (Exception ex) {
             throw (RuntimeException)
                     new UnsupportedOperationException(getClass().getName() + " does not support clone()").initCause(ex);
         }
     } // -- InputLocation clone()
 
     /**
      * Get the one-based column number. The value will be
      * non-positive if unknown.
      *
      * @return int
      */
     public int getColumnNumber() {
         return this.columnNumber;
     } // -- int getColumnNumber()
 
     /**
      * Get the one-based line number. The value will be
      * non-positive if unknown.
      *
      * @return int
      */
     public int getLineNumber() {
         return this.lineNumber;
     } // -- int getLineNumber()
 
     /**
      * Gets the InputLocation for a specific nested element key.
      *
      * @param key the key to look up
      * @return the InputLocation for the specified key, or null if not found
      */
     @Override
     public InputLocation getLocation(Object key) {
         if (key instanceof String string) {
             switch (string) {
                 case "": {
                     return this.location;
                 }
                 default: {
                     return getOtherLocation(key);
                 }
             }
         } else {
             return getOtherLocation(key);
         }
     } // -- InputLocation getLocation( Object )
 
     /**
      * Gets the map of nested element locations within this location.
      *
      * @return a map of keys to InputLocation instances for nested elements, or null if none
      */
     public java.util.Map<Object, InputLocation> getLocations() {
         return locations;
     } // -- java.util.Map<Object, InputLocation> getLocations()
 
     /**
      * Sets the InputLocation for a specific nested element key.
      *
      * @param key the key to set the location for
      * @param location the InputLocation to associate with the key
      */
     @Override
     public void setLocation(Object key, InputLocation location) {
         if (key instanceof String string) {
             switch (string) {
                 case "": {
                     this.location = location;
                     return;
                 }
                 default: {
                     setOtherLocation(key, location);
                     return;
                 }
             }
         } else {
             setOtherLocation(key, location);
         }
     } // -- void setLocation( Object, InputLocation )
 
     /**
      * Sets the InputLocation for a specific nested element key in the locations map.
      * This is a helper method that manages the internal locations map.
      *
      * @param key the key to set the location for
      * @param location the InputLocation to associate with the key
      */
     public void setOtherLocation(Object key, InputLocation location) {
         if (location != null) {
             if (this.locations == null) {
                 this.locations = new java.util.LinkedHashMap<>();
             }
             this.locations.put(key, location);
         }
     } // -- void setOtherLocation( Object, InputLocation )
 
     /**
      *
      *
      * @param key
      * @return InputLocation
      */
     private InputLocation getOtherLocation(Object key) {
         return (locations != null) ? locations.get(key) : null;
     } // -- InputLocation getOtherLocation( Object )
 
     /**
      * Get the source field.
      *
      * @return InputSource
      */
     public InputSource getSource() {
         return this.source;
     } // -- InputSource getSource()
 
     /**
      * Gets the parent InputLocation where this InputLocation may have been imported from.
      * Can return {@code null}.
      *
      * @return InputLocation
      * @since 4.0.0
      */
     public InputLocation getImportedFrom() {
         return importedFrom;
     }
 
     /**
      * Set the imported from location.
      *
      * @param importedFrom
      */
     public void setImportedFrom(InputLocation importedFrom) {
         this.importedFrom = importedFrom;
     }
 
     /**
      * Method merge.
      *
      * @param target
      * @param sourceDominant
      * @param source
      * @return InputLocation
      */
     public static InputLocation merge(InputLocation target, InputLocation source, boolean sourceDominant) {
         if (source == null) {
             return target;
         } else if (target == null) {
             return source;
         }
 
         InputLocation result = new InputLocation(target.getLineNumber(), target.getColumnNumber(), target.getSource());
 
         java.util.Map<Object, InputLocation> locations;
         java.util.Map<Object, InputLocation> sourceLocations = source.getLocations();
         java.util.Map<Object, InputLocation> targetLocations = target.getLocations();
         if (sourceLocations == null) {
             locations = targetLocations;
         } else if (targetLocations == null) {
             locations = sourceLocations;
         } else {
             locations = new java.util.LinkedHashMap();
             locations.putAll(sourceDominant ? targetLocations : sourceLocations);
             locations.putAll(sourceDominant ? sourceLocations : targetLocations);
         }
         result.setLocations(locations);
 
         return result;
     } // -- InputLocation merge( InputLocation, InputLocation, boolean )
 
     /**
      * Method merge.
      *
      * @param target
      * @param indices
      * @param source
      * @return InputLocation
      */
     public static InputLocation merge(
             InputLocation target, InputLocation source, java.util.Collection<Integer> indices) {
         if (source == null) {
             return target;
         } else if (target == null) {
             return source;
         }
 
         InputLocation result = new InputLocation(target.getLineNumber(), target.getColumnNumber(), target.getSource());
 
         java.util.Map<Object, InputLocation> locations;
         java.util.Map<Object, InputLocation> sourceLocations = source.getLocations();
         java.util.Map<Object, InputLocation> targetLocations = target.getLocations();
         if (sourceLocations == null) {
             locations = targetLocations;
         } else if (targetLocations == null) {
             locations = sourceLocations;
         } else {
             locations = new java.util.LinkedHashMap<>();
             for (java.util.Iterator<Integer> it = indices.iterator(); it.hasNext(); ) {
                 InputLocation location;
                 Integer index = it.next();
                 if (index.intValue() < 0) {
                     location = sourceLocations.get(Integer.valueOf(~index.intValue()));
                 } else {
                     location = targetLocations.get(index);
                 }
                 locations.put(Integer.valueOf(locations.size()), location);
             }
         }
         result.setLocations(locations);
 
         return result;
     } // -- InputLocation merge( InputLocation, InputLocation, java.util.Collection )
 
     /**
      *
      *
      * @param locations
      */
     public void setLocations(java.util.Map<Object, InputLocation> locations) {
         this.locations = locations;
     } // -- void setLocations( java.util.Map )
 
     /**
      * Converts this compat model InputLocation to an API model InputLocation.
      * This method is used for converting between the compat model and the API model.
      *
      * @return the equivalent API model InputLocation
      */
     public org.apache.maven.api.model.InputLocation toApiLocation() {
         if (locations != null && locations.values().contains(this)) {
             if (locations.size() == 1 && locations.values().iterator().next() == this) {
                 return org.apache.maven.api.model.InputLocation.of(
                         lineNumber,
                         columnNumber,
                         source != null ? source.toApiSource() : null,
                         locations.keySet().iterator().next());
             } else {
                 return org.apache.maven.api.model.InputLocation.of(
                         lineNumber, columnNumber, source != null ? source.toApiSource() : null);
             }
         } else {
             return org.apache.maven.api.model.InputLocation.of(
                     lineNumber,
                     columnNumber,
                     source != null ? source.toApiSource() : null,
                     locations != null
                             ? locations.entrySet().stream().collect(Collectors.toMap(e -> e.getKey(), e -> e.getValue()
                                     .toApiLocation()))
                             : null);
         }
     }
 
     // -----------------/
     // - Inner Classes -/
     // -----------------/
 
     /**
      * Class StringFormatter.
      *
      * @version $Revision$ $Date$
      */
     public abstract static class StringFormatter {
 
         // -----------/
         // - Methods -/
         // -----------/
 
         /**
          * Method toString.
          *
          * @param location
          * @return String
          */
         public abstract String toString(InputLocation location);
     }
 
     @Override
     public boolean equals(Object o) {
         if (this == o) {
             return true;
         }
         if (o == null || getClass() != o.getClass()) {
             return false;
         }
         InputLocation that = (InputLocation) o;
         return lineNumber == that.lineNumber
                 && columnNumber == that.columnNumber
                 && java.util.Objects.equals(source, that.source)
                 && java.util.Objects.equals(locations, that.locations)
                 && java.util.Objects.equals(importedFrom, that.importedFrom);
     }
 
     @Override
     public int hashCode() {
         int result = hashCode;
         if (result == 0) {
             result = java.util.Objects.hash(lineNumber, columnNumber, source, locations, importedFrom);
             hashCode = result;
         }
         return result;
     }
 
     @Override
     public String toString() {
         return getLineNumber() + " : " + getColumnNumber() + ", " + getSource();
     }
 }