/* ====================================================================
   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.hwpf;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.util.List;

import javax.imageio.ImageIO;

import org.apache.poi.POIDataSamples;
import org.apache.poi.hwpf.model.PicturesTable;
import org.apache.poi.hwpf.usermodel.Picture;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

/**
 * Test picture support in HWPF
 */
public final class TestHWPFPictures {
    @BeforeAll
    static void setUp() {
        // we use ImageIO in one of the tests here so we should ensure that the temporary directory is created correctly
        File tempDir = new File(System.getProperty("java.io.tmpdir"));
        assertTrue( tempDir.exists() || tempDir.mkdirs(), "Could not create temporary directory " + tempDir.getAbsolutePath() + ": " + tempDir.exists() + "/" + tempDir.isDirectory() );
    }

    /**
     * Test that we have the right numbers of images in each file
     */
    @Test
    void testImageCount() {
        HWPFDocument docA = HWPFTestDataSamples.openSampleFile("testPictures.doc");
        HWPFDocument docB = HWPFTestDataSamples.openSampleFile("two_images.doc");

        assertNotNull(docA.getPicturesTable());
        assertNotNull(docB.getPicturesTable());

        PicturesTable picA = docA.getPicturesTable();
        PicturesTable picB = docB.getPicturesTable();

        List<Picture> picturesA = picA.getAllPictures();
        List<Picture> picturesB = picB.getAllPictures();

        assertEquals(7, picturesA.size());
        assertEquals(2, picturesB.size());
    }

    /**
     * Test that we have the right images in at least one file
     */
    @Test
    void testImageData() {
        HWPFDocument docB = HWPFTestDataSamples.openSampleFile("two_images.doc");
        PicturesTable picB = docB.getPicturesTable();
        List<Picture> picturesB = picB.getAllPictures();

        assertEquals(2, picturesB.size());

        Picture pic1 = picturesB.get(0);
        Picture pic2 = picturesB.get(1);

        assertNotNull(pic1);
        assertNotNull(pic2);

        // Check the same
        byte[] pic1B = readFile("simple_image.jpg");
        byte[] pic2B = readFile("simple_image.png");

        assertArrayEquals(pic1B, pic1.getContent());
        assertArrayEquals(pic2B, pic2.getContent());
    }

    /**
     * Test that compressed image data is correctly returned.
     */
    @Test
    void testCompressedImageData() {
        HWPFDocument docC = HWPFTestDataSamples.openSampleFile("vector_image.doc");
        PicturesTable picC = docC.getPicturesTable();
        List<Picture> picturesC = picC.getAllPictures();

        assertEquals(1, picturesC.size());

        Picture pic = picturesC.get(0);
        assertNotNull(pic);

        // Check the same
        byte[] picBytes = readFile("vector_image.emf");
        assertArrayEquals(picBytes, pic.getContent());
    }

    @Test
    void testMacImages() throws Exception {
        HWPFDocument docC = HWPFTestDataSamples.openSampleFile("53446.doc");
        PicturesTable picturesTable = docC.getPicturesTable();
        List<Picture> pictures = picturesTable.getAllPictures();

        assertEquals(4, pictures.size());

        int[][] expectedSizes = {
            { 185, 42 },  // PNG
            { 260, 114 }, // PNG
            { 185, 42 },  // PNG
            { 260, 114 }, // PNG
       };

       for (int i = 0; i < pictures.size(); i++) {
           BufferedImage image = ImageIO.read(new ByteArrayInputStream(pictures.get(i).getContent()));
           assertNotNull(image);

           int[] dimensions = expectedSizes[i];
           assertEquals(dimensions[0], image.getWidth());
           assertEquals(dimensions[1], image.getHeight());
       }
    }

    /**
     * Pending the missing files being uploaded to
     *  bug #44937
     */
    @Test
    void testEscherDrawing() {
        HWPFDocument docD = HWPFTestDataSamples.openSampleFile("GaiaTest.doc");
        List<Picture> allPictures = docD.getPicturesTable().getAllPictures();

        assertEquals(1, allPictures.size());

        Picture pic = allPictures.get(0);
        assertNotNull(pic);
        byte[] picD = readFile("GaiaTestImg.png");

        assertEquals(picD.length, pic.getContent().length);

        assertArrayEquals(picD, pic.getContent());
    }

    private static byte[] readFile(String file) {
        return POIDataSamples.getDocumentInstance().readFile(file);
    }
}