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PlantUML is a component that allows to quickly write diagrams from text.
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// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
 * |
 * |      PlantUML : a free UML diagram generator
 * |
 * +=======================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 *
 * If you like this project or if you find it useful, you can support us at:
 *
 * https://plantuml.com/patreon (only 1$ per month!)
 * https://plantuml.com/liberapay (only 1€ per month!)
 * https://plantuml.com/paypal
 *
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the Apache Software License.
 *
 * 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.
 *
 * PlantUML can occasionally display sponsored or advertising messages. Those
 * messages are usually generated on welcome or error images and never on
 * functional diagrams.
 * See https://plantuml.com/professional if you want to remove them
 *
 * Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
 * are owned by the author of their corresponding sources code (that is, their
 * textual description in PlantUML language). Those images are not covered by
 * this APACHE license.
 *
 * The generated images can then be used without any reference to the APACHE license.
 * It is not even necessary to stipulate that they have been generated with PlantUML,
 * although this will be appreciated by the PlantUML team.
 *
 * There is an exception : if the textual description in PlantUML language is also covered
 * by any license, then the generated images are logically covered
 * by the very same license.
 *
 * This is the IGY distribution (Install GraphViz by Yourself).
 * You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
 * (see https://plantuml.com/graphviz-dot )
 *
 * Icons provided by OpenIconic :  https://useiconic.com/open
 * Archimate sprites provided by Archi :  http://www.archimatetool.com
 * Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
 * Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
 * ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
 * ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
 * CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
 * Brotli (c) by the Brotli Authors https://github.com/google/brotli
 * Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
 * Twemoji (c) by Twitter at https://twemoji.twitter.com/
 *
 */
package org.stathissideris.ascii2image.graphics;

import org.stathissideris.ascii2image.text.CellSet;
import org.stathissideris.ascii2image.text.TextGrid;

/**
 * 
 * @author Efstathios Sideris
 */
public abstract class DiagramComponent {
	
	private static final boolean DEBUG = false;
	
	protected static ShapePoint makePointForCell(TextGrid.Cell cell, TextGrid grid, int cellWidth, int cellHeight, boolean allRound){
		if (DEBUG)
			System.out.println("Found point at cell "+cell);
		if(grid.isCorner(cell) && allRound){
			return new ShapePoint(
							cell.x * cellWidth + cellWidth/2,
							cell.y * cellHeight + cellHeight/2,
							ShapePoint.TYPE_ROUND  
						);
		} else if(grid.isNormalCorner(cell)){
			return new ShapePoint(
							cell.x * cellWidth + cellWidth/2,
							cell.y * cellHeight + cellHeight/2,
							ShapePoint.TYPE_NORMAL  
						);
		} else if(grid.isRoundCorner(cell)){
			return new ShapePoint(
							cell.x * cellWidth + cellWidth/2,
							cell.y * cellHeight + cellHeight/2,
							ShapePoint.TYPE_ROUND  
						);
		} else if(grid.isLinesEnd(cell)){
			return new ShapePoint(
						cell.x * cellWidth + cellWidth/2,
						cell.y * cellHeight + cellHeight/2,
						ShapePoint.TYPE_NORMAL  
					);
		} else if(grid.isIntersection(cell)){
			return new ShapePoint(
					cell.x * cellWidth + cellWidth/2,
					cell.y * cellHeight + cellHeight/2,
					ShapePoint.TYPE_NORMAL 
				);
		}
		throw new RuntimeException("Cannot make point for cell "+cell);
	}

	public static DiagramComponent createClosedFromBoundaryCells(TextGrid grid, CellSet cells, int cellWidth, int cellHeight){
		return createClosedFromBoundaryCells(grid, cells, cellWidth, cellHeight, false);
	}

	public static DiagramComponent createClosedFromBoundaryCells(TextGrid grid, CellSet cells, int cellWidth, int cellHeight, boolean allRound){
		if(cells.getType(grid) == CellSet.TYPE_OPEN) throw new IllegalArgumentException("CellSet is closed and cannot be handled by this method");
		if(cells.size() < 2) return null;
		
		DiagramShape shape = new DiagramShape();
		shape.setClosed(true);
		if(grid.containsAtLeastOneDashedLine(cells)) shape.setStrokeDashed(true);
		
		TextGrid workGrid = new TextGrid(grid.getWidth(), grid.getHeight());
		grid.copyCellsTo(cells, workGrid);
		
		if (DEBUG){
			System.out.println("Making closed shape from buffer:");
			workGrid.printDebug();
		}
		
		TextGrid.Cell start = (TextGrid.Cell) cells.getFirst();
		if(workGrid.isCorner(start)) shape.addToPoints(makePointForCell(start, workGrid, cellWidth, cellHeight, allRound));
		TextGrid.Cell previous = start;
		TextGrid.Cell cell = null;
		CellSet nextCells = workGrid.followCell(previous);
		if(nextCells.size() == 0) return null;
		cell = (TextGrid.Cell) nextCells.getFirst();
		if(workGrid.isCorner(cell)) shape.addToPoints(makePointForCell(cell, workGrid, cellWidth, cellHeight, allRound));
		
		while(!cell.equals(start)){
			nextCells = workGrid.followCell(cell, previous);
			if(nextCells.size() == 1) {
				previous = cell;
				cell = (TextGrid.Cell) nextCells.getFirst();
				if(!cell.equals(start) && workGrid.isCorner(cell))
					shape.addToPoints(makePointForCell(cell, workGrid, cellWidth, cellHeight, allRound));
			} else if(nextCells.size() > 1) {
				return null;
			} else {
				throw new RuntimeException("cannot create closed shape from boundary cells, nowhere to go from "
						+ cell + " coming from " + previous + " in grid:\n" + grid
						+"\nmaybe you have an edge pointing nowhere?");
			}
		}
		
		return shape;
		
	}
}