/*=============================================================================#
 # Copyright (c) 2015-2016 David Green and others.
 # All rights reserved. This program and the accompanying materials
 # are made available under the terms of the Eclipse Public License v1.0
 # which accompanies this distribution, and is available at
 # http://www.eclipse.org/legal/epl-v10.html
 # 
 # Contributors:
 #     David Green - initial API and implementation in Mylyn
 #     Stephan Wahlbrink (WalWare.de)
 #=============================================================================*/

package de.walware.docmlet.wikitext.commonmark.core;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;

import java.io.StringWriter;
import java.util.concurrent.atomic.AtomicReference;

import org.eclipse.mylyn.wikitext.core.parser.Attributes;
import org.eclipse.mylyn.wikitext.core.parser.Locator;
import org.eclipse.mylyn.wikitext.core.parser.MarkupParser;
import org.eclipse.mylyn.wikitext.core.parser.builder.HtmlDocumentBuilder;
import org.eclipse.mylyn.wikitext.core.util.LocatorImpl;
import org.junit.Test;


public class CommonmarkLanguageDocumentOffsetsTest {
	
	
	public CommonmarkLanguageDocumentOffsetsTest() {
	}
	
	
	@Test
	public void blockQuoteWithBoldSpanUnix() {
		assertSpanOffsets(6, 15, "<blockquote><p>one <strong>two\nthree</strong> four</p></blockquote>",
				"> one **two\n> three** four");
	}
	
	@Test
	public void blockQuoteWithBoldSpanWindows() {
		assertSpanOffsets(6, 16, "<blockquote><p>one <strong>two\nthree</strong> four</p></blockquote>",
				"> one **two\r\n> three** four");
	}
	
	@Test
	public void blockQuoteWithBoldSpanMac() {
		assertSpanOffsets(6, 15, "<blockquote><p>one <strong>two\nthree</strong> four</p></blockquote>",
				"> one **two\r> three** four");
	}
	
	@Test
	public void blockQuoteWithNestedListAndEmphasis() {
		assertSpanOffsets(8, 16, "<blockquote><ul><li>one <em>two\nthree</em></li></ul></blockquote>",
				"> * one *two\r\n>   three*");
	}
	
	private void assertSpanOffsets(int offset, int length, String expectedHtml, String markup) {
		final AtomicReference<Locator> spanLocator = new AtomicReference<>();
		CommonmarkLanguage language = new CommonmarkLanguage();
		MarkupParser parser = new MarkupParser(language);
		StringWriter out = new StringWriter();
		HtmlDocumentBuilder builder = new HtmlDocumentBuilder(out) {
			
			@Override
			public void beginSpan(SpanType type, Attributes attributes) {
				assertNull(spanLocator.get());
				spanLocator.set(new LocatorImpl(getLocator()));
				super.beginSpan(type, attributes);
			}
			
		};
		builder.setEmitAsDocument(false);
		parser.setBuilder(builder);
		parser.parse(markup);
		
		assertEquals(expectedHtml, out.toString());
		
		Locator locator = spanLocator.get();
		assertNotNull(locator);
		assertEquals(offset, locator.getDocumentOffset());
		int actualLength = locator.getLineSegmentEndOffset() - locator.getLineCharacterOffset();
		assertEquals(length, actualLength);
	}
	
}