/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You 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.
==================================================================== */

package org.apache.poi.hssf.usermodel;

import junit.framework.AssertionFailedError;
import junit.framework.TestCase;

import org.apache.poi.hssf.HSSFTestDataSamples;

/**
 * Tests for {@link HSSFHeader} / {@link HSSFFooter}
 *
 * @author Shawn Laubach (slaubach at apache dot com)
 */
public final class TestHSSFHeaderFooter extends TestCase {

	/**
	 * Tests that get header retrieves the proper values.
	 *
	 * @author Shawn Laubach (slaubach at apache dot org)
	 */
	public void testRetrieveCorrectHeader() {

		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("EmbeddedChartHeaderTest.xls");
		HSSFSheet s = wb.getSheetAt( 0 );
		HSSFHeader head = s.getHeader();

		assertEquals("Top Left", head.getLeft());
		assertEquals("Top Center", head.getCenter());
		assertEquals("Top Right", head.getRight());
	}

	public void testSpecialChars() {
		assertEquals("&U", HSSFHeader.startUnderline());
		assertEquals("&U", HSSFHeader.endUnderline());
		assertEquals("&P", HSSFHeader.page());

		assertEquals("&22", HSSFFooter.fontSize((short)22));
		assertEquals("&\"Arial,bold\"", HSSFFooter.font("Arial", "bold"));
	}

	public void testStripFields() {
		String simple = "I am a test header";
		String withPage = "I am a&P test header";
		String withLots = "I&A am&N a&P test&T header&U";
		String withFont = "I&22 am a&\"Arial,bold\" test header";
		String withOtherAnds = "I am a&P test header&&";
		String withOtherAnds2 = "I am a&P test header&a&b";

		assertEquals(simple, HSSFHeader.stripFields(simple));
		assertEquals(simple, HSSFHeader.stripFields(withPage));
		assertEquals(simple, HSSFHeader.stripFields(withLots));
		assertEquals(simple, HSSFHeader.stripFields(withFont));
		assertEquals(simple + "&&", HSSFHeader.stripFields(withOtherAnds));
		assertEquals(simple + "&a&b", HSSFHeader.stripFields(withOtherAnds2));

		// Now test the default strip flag
		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("EmbeddedChartHeaderTest.xls");
		HSSFSheet s = wb.getSheetAt( 0 );
		HSSFHeader head = s.getHeader();

		assertEquals("Top Left", head.getLeft());
		assertEquals("Top Center", head.getCenter());
		assertEquals("Top Right", head.getRight());

		head.setLeft("Top &P&F&D Left");
		assertEquals("Top &P&F&D Left", head.getLeft());

		assertEquals("Top  Left", HeaderFooter.stripFields(head.getLeft()));

		// Now even more complex
		head.setCenter("HEADER TEXT &P&N&D&T&Z&F&F&A&G&X END");
		assertEquals("HEADER TEXT  END",  HeaderFooter.stripFields(head.getCenter()));
	}

	/**
	 * Tests that get header retrieves the proper values.
	 *
	 * @author Shawn Laubach (slaubach at apache dot org)
	 */
	public void testRetrieveCorrectFooter() {

		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("EmbeddedChartHeaderTest.xls");
		HSSFSheet s = wb.getSheetAt(0);
		HSSFFooter foot = s.getFooter();

		assertEquals("Bottom Left", foot.getLeft());
		assertEquals("Bottom Center", foot.getCenter());
		assertEquals("Bottom Right", foot.getRight());
	}

	/**
	 * Testcase for Bug 17039 HSSFHeader  does not support DBCS
	 */
	public void testHeaderHas16bitCharacter() {
		HSSFWorkbook b = new HSSFWorkbook();
		HSSFSheet s = b.createSheet("Test");
		HSSFHeader h = s.getHeader();
		h.setLeft("\u0391");
		h.setCenter("\u0392");
		h.setRight("\u0393");

		HSSFWorkbook b2 = HSSFTestDataSamples.writeOutAndReadBack(b);
		HSSFHeader h2 = b2.getSheet("Test").getHeader();

		assertEquals(h2.getLeft(),"\u0391");
		assertEquals(h2.getCenter(),"\u0392");
		assertEquals(h2.getRight(),"\u0393");
	}

	/**
	 * Testcase for Bug 17039 HSSFFooter does not support DBCS
	 */
	 public void testFooterHas16bitCharacter() {
		HSSFWorkbook b = new HSSFWorkbook();
		HSSFSheet s = b.createSheet("Test");
		HSSFFooter f = s.getFooter();
		f.setLeft("\u0391");
		f.setCenter("\u0392");
		f.setRight("\u0393");

		HSSFWorkbook b2 = HSSFTestDataSamples.writeOutAndReadBack(b);
		HSSFFooter f2 = b2.getSheet("Test").getFooter();

		assertEquals(f2.getLeft(),"\u0391");
		assertEquals(f2.getCenter(),"\u0392");
		assertEquals(f2.getRight(),"\u0393");
	}

	public void testReadDBCSHeaderFooter() {
		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("DBCSHeader.xls");
		HSSFSheet s = wb.getSheetAt(0);
		HSSFHeader h = s.getHeader();
		assertEquals("Header Left " ,h.getLeft(),"\u090f\u0915");
		assertEquals("Header Center " ,h.getCenter(),"\u0939\u094b\u0917\u093e");
		assertEquals("Header Right " ,h.getRight(),"\u091c\u093e");

		HSSFFooter f = s.getFooter();
		assertEquals("Footer Left " ,f.getLeft(),"\u091c\u093e");
		assertEquals("Footer Center " ,f.getCenter(),"\u091c\u093e");
		assertEquals("Footer Right " ,f.getRight(),"\u091c\u093e");
	}

	/**
	 * Excel tolerates files with missing HEADER/FOOTER records.  POI should do the same.
	 */
	public void testMissingHeaderFooterRecord_bug47244() {
		// noHeaderFooter47244.xls was created by a slightly modified POI
		// which omitted the HEADER/FOOTER records
		HSSFWorkbook wb = HSSFTestDataSamples.openSampleWorkbook("noHeaderFooter47244.xls");
		HSSFSheet sheet = wb.getSheetAt(0);
		HSSFFooter footer;
		try {
			footer = sheet.getFooter();
		} catch (NullPointerException e) {
			throw new AssertionFailedError("Identified bug 47244a");
		}
		assertEquals("", footer.getRawText());
		HSSFHeader header = sheet.getHeader();
		assertEquals("", header.getRawText());

		// make sure header / footer is properly linked to underlying data 
		HSSFHeader header2 = sheet.getHeader();
		header.setCenter("foo");
		assertEquals("foo", header2.getCenter());

		HSSFFooter footer2 = sheet.getFooter();
		footer.setCenter("bar");
		assertEquals("bar", footer2.getCenter());
	}
}