/*
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 *    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.
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 */

package org.apache.poi.sl;

import static org.junit.Assert.assertEquals;
import static org.junit.Assume.assumeFalse;

import java.awt.geom.Rectangle2D;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.poi.POIDataSamples;
import org.apache.poi.hslf.usermodel.HSLFSlideShow;
import org.apache.poi.sl.usermodel.SlideShow;
import org.apache.poi.sl.usermodel.SlideShowFactory;
import org.apache.poi.sl.usermodel.TableCell;
import org.apache.poi.sl.usermodel.TableShape;
import org.apache.poi.sl.usermodel.TextShape.TextDirection;
import org.apache.poi.xslf.usermodel.XMLSlideShow;
import org.junit.BeforeClass;
import org.junit.Test;

public class TestTable {
    private static POIDataSamples _slTests = POIDataSamples.getSlideShowInstance();
    private static boolean xslfOnly = false;

    @BeforeClass
    public static void checkHslf() {
        try {
            Class.forName("org.apache.poi.hslf.usermodel.HSLFSlideShow");
        } catch (Exception e) {
            xslfOnly = true;
        }
    }
    
    
    /** a generic way to open a sample slideshow document **/
    public static SlideShow<?,?> openSampleSlideshow(String sampleName) throws IOException {
        InputStream is = _slTests.openResourceAsStream(sampleName);
        try {
            return SlideShowFactory.create(is);
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            is.close();
        }
    }
    
    @Test
    public void testColWidthRowHeight() throws IOException {
        assumeFalse(xslfOnly);

        // Test of table dimensions of same slideshow saved as ppt/x
        // to check if both return similar (points) value
        SlideShow<?,?> ppt = openSampleSlideshow("table_test.ppt");
        TableShape<?,?> ts = (TableShape<?,?>)ppt.getSlides().get(0).getShapes().get(0);

        SlideShow<?,?> pptx = openSampleSlideshow("table_test.pptx");
        TableShape<?,?> tsx = (TableShape<?,?>)pptx.getSlides().get(0).getShapes().get(0);
        
        // assume table shape should be equal to itself
        confirmTableShapeEqual(ts, ts);
        confirmTableShapeEqual(tsx, tsx);
        
        // assert ppt and pptx versions of the same table have the same shape
        confirmTableShapeEqual(ts, tsx);

        pptx.close();
        ppt.close();
    }
    
    private void confirmTableShapeEqual(TableShape<?,?> tableA, TableShape<?,?> tableB) {
        int cols = tableA.getNumberOfColumns();
        int rows = tableA.getNumberOfRows();
        
        int colsx = tableB.getNumberOfColumns();
        int rowsx = tableB.getNumberOfRows();
        
        assertEquals("tables should have same number of columns", cols, colsx);
        assertEquals("tables should have same number of rows", rows, rowsx);
        
        for (int i=0; i<cols; i++) {
            assertEquals("Width of column " + i + " should be equal",
                    tableA.getColumnWidth(i), tableB.getColumnWidth(i), 0.2);
        }

        for (int i=0; i<rows; i++) {
            assertEquals("Height of row " + i + " should be equal",
                    tableA.getRowHeight(i), tableB.getRowHeight(i), 0.3);
        }
    }

    @Test
    public void testTextDirectionHSLF() throws IOException {
        assumeFalse(xslfOnly);
        SlideShow<?,?> ppt1 = new HSLFSlideShow();
        testTextDirection(ppt1);
        ppt1.close();
    }
    
    @Test
    public void testTextDirectionXSLF() throws IOException {
        SlideShow<?,?> ppt1 = new XMLSlideShow();
        testTextDirection(ppt1);
        ppt1.close();
    }
    
    private void testTextDirection(SlideShow<?,?> ppt1) throws IOException {
        
        TextDirection tds[] = {
            TextDirection.HORIZONTAL,
            TextDirection.VERTICAL,
            TextDirection.VERTICAL_270,
            // TextDirection.STACKED is not supported on HSLF
        };
        
        TableShape<?,?> tbl1 = ppt1.createSlide().createTable(1, 3);
        tbl1.setAnchor(new Rectangle2D.Double(50, 50, 200, 200));
    
        int col = 0;
        for (TextDirection td : tds) {
            TableCell<?,?> c = tbl1.getCell(0, col++);
            if (c != null) {
                c.setTextDirection(td);
                c.setText("bla");
            }
        }
        
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ppt1.write(bos);
        ppt1.close();
        
        InputStream is = new ByteArrayInputStream(bos.toByteArray());
        SlideShow<?,?> ppt2 = SlideShowFactory.create(is);
        TableShape<?,?> tbl2 = (TableShape<?,?>)ppt2.getSlides().get(0).getShapes().get(0);
        
        col = 0;
        for (TextDirection td : tds) {
            TableCell<?,?> c = tbl2.getCell(0, col++);
            assertEquals(td, c.getTextDirection());
        }
        ppt2.close();
    }
}