package com.editev.chess.printer;

import com.editev.chess.GameHTML;

/** Prints a style sheet, if necessary. 
 *
 *  @see See the source <a href="StyleSheetPrinter.java">here</a>.
 */
public class StyleSheetPrinter extends Printer {

    /** Color of a black piece. */
    public static final String BLACK_PIECE  = "#000000";

    /** Color of a black square. */
    public static final String BLACK_SQUARE = "#777700";

    /** Color of a white piece. */
    public static final String WHITE_PIECE  = "#FFFFFF";

    /** Color of a white square. */
    public static final String WHITE_SQUARE = "#AAAA66";

    /** The color of a piece. 
     *
     *  @return the color of a piece. 
     *  @param isWhite is the piece white or black? 
     */        
    private static String pieceColor(  boolean isWhite ) { return isWhite ? WHITE_PIECE  : BLACK_PIECE ; }

    /** The color of a square. 
     *
     *  @return the color of a square. 
     *  @param isWhite is the square white or black? 
     */        
    private static String squareColor( boolean isWhite ) { return isWhite ? WHITE_SQUARE : BLACK_SQUARE; }
    
    /** The name of a style for a given square and piece color. 
     *
     * @return name of the style representing that piece and square color. 
     */
    public static String styleName( boolean isWhitePiece, boolean isWhiteSquare ) {
        return 
            isWhitePiece ? 
                (isWhiteSquare ? "whiteWhite" : "whiteBlack")
              : (isWhiteSquare ? "blackWhite" : "blackBlack");
    }
    
    /** The name of a style for a captured piece. 
     *
     * @return name of the style representing that piece and square color. 
     */
    public static String captureStyleName( boolean isWhitePiece ) {
        return  isWhitePiece ? "white" : "black";
    }
    
    /** A template for CSS styles for squares and pieces. */
    private static String STYLE_TEMPLATE = "; font-size: x-large; font-family: sans-serif }\n";

    /** A template for CSS styles for captured pieces.. */
    private static String CAPTURE_STYLE_TEMPLATE = "; font-family: sans-serif }\n";

    /** Get the CSS style definition for this piece and square color.  
     *
     *  @return the style definition for the CSS style sheet.
     */
    public static String getCSSDefinition( boolean isWhitePiece, boolean isWhiteSquare ) {
        return 
            "  ." + styleName( isWhitePiece, isWhiteSquare ) 
          + " { color: " + pieceColor( isWhitePiece )
          + "; background-color: " + squareColor( isWhiteSquare )
          + STYLE_TEMPLATE;
    }

    /** Get the CSS style definition for captured pieces.
     *
     *  @return the style definition for captured pieces.
     */
    public static String getCaptureCSSDefinition( boolean isWhitePiece ) {
        return 
            "  ." + captureStyleName( isWhitePiece ) 
          + " { color: " + pieceColor( isWhitePiece )
          + "; background-color: " + squareColor( !isWhitePiece )
          + CAPTURE_STYLE_TEMPLATE;
    }
    
    public static final String HISTORY_STYLE_NAME = "hist";
    public static final String HISTORY_STYLE = "  ."+HISTORY_STYLE_NAME +" { font-size: small; font-family: mono; color: #000000 }\n";


    /** Information that needs to appear in the header of the HTML document, including CSS style sheets and Javascript. */
    public static final String HEADER = 
        " <style type=\"text/css\">\n"
      + " <!--\n\n"
      
      + getCSSDefinition( false, false )
      + getCSSDefinition( false, true  )
      + getCSSDefinition( true,  false )
      + getCSSDefinition( true,  true  )
      
      + getCaptureCSSDefinition( false )
      + getCaptureCSSDefinition( true  )
      
      + HISTORY_STYLE

      + "\n -->\n"      
      + " </style>\n\n";
      

    public void print( GameHTML game ) {
        if (!game.hasStyles) return;
        game.out.print( HEADER );
    }
}