/*
    * Copyright (C) 2021-2023 Dipl.-Inform. Kai Hofmann. All rights reserved!
    */
   package de.powerstat.validation.values;
   
   
   import java.util.Objects;
   
   import de.powerstat.validation.interfaces.IValueObject;
  
  
  /**
   * Display aspect ratio.
   *
   * 1:1 2.1:1 3:1 3:2 4:3 5:3 5:4 8:5 9:5 10:6 15:9 16:9 16:10 17:10 25:12 25:16 60:29 64:35 72:35
   */
  public final class DisplayAspectRatio implements Comparable<DisplayAspectRatio>, IValueObject
   {
    /* *
     * Cache for singletons.
     */
    // private static final Map<NTuple2<Integer, Integer>, DisplayAspectRatio> CACHE = new WeakHashMap<>();
  
    /**
     * Display x size (1-72).
     */
    private final int x;
  
    /**
     * Display y size (1-35).
     */
    private final int y;
  
  
    /**
     * Constructor.
     *
     * @param x Display x site (1-72)
     * @param y Display y size (1-35)
     */
    private DisplayAspectRatio(final int x, final int y)
     {
      super();
      if ((x <= 0) || (x > 72))
       {
        throw new IndexOutOfBoundsException("x out of range (1-72)"); //$NON-NLS-1$
       }
      if ((y <= 0) || (y > 35))
       {
        throw new IndexOutOfBoundsException("y out of range (1-35)"); //$NON-NLS-1$
       }
      // verify existing aspect ratios
      this.x = x;
      this.y = y;
     }
  
  
    /**
     * Display aspect ration factory.
     *
     * @param x Display x site (1-72)
     * @param y Display y size (1-35)
     * @return DisplayAspectRatio object
     */
    public static DisplayAspectRatio of(final int x, final int y)
     {
      /*
      final NTuple2<Integer, Integer> tuple = NTuple2.of(x, y);
      synchronized (DisplayAspectRatio.class)
       {
        DisplayAspectRatio obj = DisplayAspectRatio.CACHE.get(tuple);
        if (obj != null)
         {
          return obj;
         }
        obj = new DisplayAspectRatio(x, y);
        DisplayAspectRatio.CACHE.put(tuple, obj);
        return obj;
       }
      */
      return new DisplayAspectRatio(x, y);
     }
  
  
    /**
     * Display aspect ration factory.
     *
     * @param value String value of type x:y
     * @return DisplayAspectRatio object
     * @throws IllegalArgumentException If not of correct format
     */
    public static DisplayAspectRatio of(final String value)
     {
      final String[] values = value.split(":");
      if (values.length != 2)
       {
        throw new IllegalArgumentException("Not of format x:y");
       }
      return of(Integer.parseInt(values[0]), Integer.parseInt(values[1]));
    }
 
 
   /**
    * Get display x size.
    *
    * @return X size
    */
   public int getX()
    {
     return this.x;
    }
 
 
   /**
    * Get display y size.
    *
    * @return Y size
    */
   public int getY()
    {
     return this.y;
    }
 
 
   /**
    * Returns the value of this DisplayAspectRatio as a string.
    *
    * @return The text value represented by this object after conversion to type string.
    */
   @Override
   public String stringValue()
    {
     return String.valueOf(this.x) + ':' + this.y;
    }
 
 
   /**
    * Calculate hash code.
    *
    * @return Hash
    * @see java.lang.Object#hashCode()
    */
   @Override
   public int hashCode()
    {
     final int result = Integer.hashCode(this.x);
     return (31 * result) + Integer.hashCode(this.y);
    }
 
 
   /**
    * Is equal with another object.
    *
    * @param obj Object
    * @return true when equal, false otherwise
    * @see java.lang.Object#equals(java.lang.Object)
    */
   @Override
   public boolean equals(final Object obj)
    {
     if (this == obj)
      {
       return true;
      }
     if (!(obj instanceof DisplayAspectRatio))
      {
       return false;
      }
     final DisplayAspectRatio other = (DisplayAspectRatio)obj;
     return (this.x == other.x) && (this.y == other.y);
    }
 
 
   /**
    * Returns the string representation of this DisplayAspectRatio.
    *
    * The exact details of this representation are unspecified and subject to change, but the following may be regarded as typical:
    *
    * "DisplayAspectRatio[x=1, y=1]"
    *
    * @return String representation of this DisplayAspectRatio
    * @see java.lang.Object#toString()
    */
   @Override
   public String toString()
    {
     final var builder = new StringBuilder(30);
     builder.append("DisplayAspectRatio[x=").append(this.x).append(", y=").append(this.y).append(']'); //$NON-NLS-1$ //$NON-NLS-2$
     return builder.toString();
    }
 
 
   /**
    * Compare with another object.
    *
    * @param obj Object to compare with
    * @return 0: equal; 1: greater; -1: smaller
    * @see java.lang.Comparable#compareTo(java.lang.Object)
    */
   @Override
   public int compareTo(final DisplayAspectRatio obj)
    {
     Objects.requireNonNull(obj, "obj"); //$NON-NLS-1$
     int result = Integer.compare(this.x, obj.x);
     if (result == 0)
      {
       result = Integer.compare(this.y, obj.y);
      }
     return result;
    }
 
  }