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/*************************************************************************************
 * Copyright (c) 2011, 2012, 2013 James Talbut.
 *  [email protected]
 *
 * 
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * https://www.eclipse.org/legal/epl-2.0/.
 * 
 * SPDX-License-Identifier: EPL-2.0
 * 
 * Contributors:
 *     James Talbut - Initial implementation.
 ************************************************************************************/

package uk.co.spudsoft.birt.emitters.excel.handlers;

import org.apache.poi.ss.usermodel.Cell;
import org.eclipse.birt.core.exception.BirtException;
import org.eclipse.birt.report.engine.content.IAutoTextContent;
import org.eclipse.birt.report.engine.content.ICellContent;
import org.eclipse.birt.report.engine.content.IContainerContent;
import org.eclipse.birt.report.engine.content.IContent;
import org.eclipse.birt.report.engine.content.IDataContent;
import org.eclipse.birt.report.engine.content.IForeignContent;
import org.eclipse.birt.report.engine.content.IImageContent;
import org.eclipse.birt.report.engine.content.ILabelContent;
import org.eclipse.birt.report.engine.content.ITableContent;
import org.eclipse.birt.report.engine.content.ITextContent;
import org.eclipse.birt.report.engine.css.engine.StyleConstants;
import org.eclipse.birt.report.engine.emitter.IContentEmitter;
import org.eclipse.birt.report.engine.layout.pdf.util.HTML2Content;

import uk.co.spudsoft.birt.emitters.excel.Area;
import uk.co.spudsoft.birt.emitters.excel.HandlerState;
import uk.co.spudsoft.birt.emitters.excel.framework.Logger;

public class StringCellHandler extends CellContentHandler {

	private String result = null;

	public StringCellHandler(IContentEmitter emitter, Logger log, IHandler parent, ICellContent cell) {
		super(emitter, log, parent, cell);
	}

	@Override
	public void endCell(HandlerState state, ICellContent cell) throws BirtException {
		endCellContent(state, cell, lastElement, null, null);
	}

	@Override
	protected void endCellContent(HandlerState state, ICellContent birtCell, IContent element, Cell cell, Area area) {
		if (lastValue != null) {
			if (lastValue instanceof String) {
				result = (String) lastValue;
			} else {
				result = lastValue.toString();
			}
		}
	}

	public void visit(Object obj) throws BirtException {
		if (obj instanceof ICellContent) {
			contentVisitor.visitCell((ICellContent) obj, null);
		} else if (obj instanceof ILabelContent) {
			contentVisitor.visitLabel((ILabelContent) obj, null);
		} else if (obj instanceof ITextContent) {
			contentVisitor.visitText((ITextContent) obj, null);
		} else if (obj instanceof IAutoTextContent) {
			contentVisitor.visitAutoText((IAutoTextContent) obj, null);
		} else if (obj instanceof IForeignContent) {
			contentVisitor.visitForeign((IForeignContent) obj, null);
		} else {
			log.warn(0, "Not visiting " + obj.getClass(), null);
		}
	}

	public String getString() {
		if (result == null) {
			if (lastValue != null) {
				if (lastValue instanceof String) {
					result = (String) lastValue;
				} else {
					result = lastValue.toString();
				}
			}
		}
		if (result == null) {
			result = "";
		}
		return result;
	}

	@Override
	public void startTable(HandlerState state, ITableContent table) throws BirtException {
		state.setHandler(new FlattenedTableHandler(this, log, this, table));
		state.getHandler().startTable(state, table);
	}

	@Override
	public void emitText(HandlerState state, ITextContent text) throws BirtException {
		String textText = text.getText();
		log.debug("text:", textText);
		emitContent(state, text, textText,
				(!"inline".equals(getStyleProperty(text, StyleConstants.STYLE_DISPLAY, "block"))));
	}

	@Override
	public void emitData(HandlerState state, IDataContent data) throws BirtException {
		emitContent(state, data, data.getValue(),
				(!"inline".equals(getStyleProperty(data, StyleConstants.STYLE_DISPLAY, "block"))));
	}

	@Override
	public void emitLabel(HandlerState state, ILabelContent label) throws BirtException {
		String labelText = (label.getLabelText() != null) ? label.getLabelText() : label.getText();
		log.debug("labelText:" + labelText);
		emitContent(state, label, labelText,
				(!"inline".equals(getStyleProperty(label, StyleConstants.STYLE_DISPLAY, "block"))));
	}

	@Override
	public void emitAutoText(HandlerState state, IAutoTextContent autoText) throws BirtException {
		emitContent(state, autoText, autoText.getText(),
				(!"inline".equals(getStyleProperty(autoText, StyleConstants.STYLE_DISPLAY, "block"))));
	}

	@Override
	public void emitForeign(HandlerState state, IForeignContent foreign) throws BirtException {

		log.debug("Handling foreign content of type " + foreign.getRawType());
		if (IForeignContent.HTML_TYPE.equalsIgnoreCase(foreign.getRawType())) {
			HTML2Content.html2Content(foreign);
			contentVisitor.visitChildren(foreign, null);
		}
	}

	@Override
	public void emitImage(HandlerState state, IImageContent image) throws BirtException {
	}

	@Override
	public void endContainer(HandlerState state, IContainerContent container) throws BirtException {
		lastCellContentsWasBlock = (!"inline"
				.equals(getStyleProperty(container, StyleConstants.STYLE_DISPLAY, "block")));
	}

}