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   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
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       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,
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package org.apache.poi.xssf.model;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import org.apache.commons.codec.binary.Hex;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.apache.poi.ss.usermodel.FillPatternType;
import org.apache.poi.ss.util.CellReference;
import org.apache.poi.xssf.XSSFTestDataSamples;
import org.apache.poi.xssf.model.ThemesTable.ThemeElement;
import org.apache.poi.xssf.usermodel.*;
import org.junit.jupiter.api.Test;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTColor;

import static org.junit.jupiter.api.Assertions.*;

class TestThemesTable {
    private static final String testFileComplex = "Themes2.xlsx";
    // TODO .xls version available too, add HSSF support then check

    // For offline testing
    private static final boolean createFiles = false;

    // What colours they should show up as
    private static final String[] rgbExpected = {
            "ffffff", // Lt1
            "000000", // Dk1
            "eeece1", // Lt2
            "1f497d", // DK2
            "4f81bd", // Accent1
            "c0504d", // Accent2
            "9bbb59", // Accent3
            "8064a2", // Accent4
            "4bacc6", // Accent5
            "f79646", // Accent6
            "0000ff", // Hlink
            "800080"  // FolHlink
    };

    @Test
    void testThemesTableColors() throws Exception {
        // Load our two test workbooks
        String testFileSimple = "Themes.xlsx";
        XSSFWorkbook simple = XSSFTestDataSamples.openSampleWorkbook(testFileSimple);
        XSSFWorkbook complex = XSSFTestDataSamples.openSampleWorkbook(testFileComplex);
        // Save and re-load them, to check for stability across that
        XSSFWorkbook simpleRS = XSSFTestDataSamples.writeOutAndReadBack(simple);
        XSSFWorkbook complexRS = XSSFTestDataSamples.writeOutAndReadBack(complex);
        // Fetch fresh copies to test with
        simple.close();
        simple = XSSFTestDataSamples.openSampleWorkbook(testFileSimple);
        complex.close();
        complex = XSSFTestDataSamples.openSampleWorkbook(testFileComplex);
        // Files and descriptions
        Map<String,XSSFWorkbook> workbooks = new LinkedHashMap<>();
        workbooks.put(testFileSimple, simple);
        workbooks.put("Re-Saved_" + testFileSimple, simpleRS);
        workbooks.put(testFileComplex, complex);
        workbooks.put("Re-Saved_" + testFileComplex, complexRS);

        // Sanity check
        assertEquals(12, rgbExpected.length);

        // Check each workbook in turn, and verify that the colours
        //  for the theme-applied cells in Column A are correct
        for (String whatWorkbook : workbooks.keySet()) {
            XSSFWorkbook workbook = workbooks.get(whatWorkbook);
            XSSFSheet sheet = workbook.getSheetAt(0);
            int startRN = 0;
            if (whatWorkbook.endsWith(testFileComplex)) startRN++;

            for (int rn=startRN; rn<rgbExpected.length+startRN; rn++) {
                XSSFRow row = sheet.getRow(rn);
                assertNotNull(row, "Missing row " + rn + " in " + whatWorkbook);
                String ref = (new CellReference(rn, 0)).formatAsString();
                XSSFCell cell = row.getCell(0);
                assertNotNull(cell, "Missing cell " + ref + " in " + whatWorkbook);

                int expectedThemeIdx = rn-startRN;
                ThemeElement themeElem = ThemeElement.byId(expectedThemeIdx);
                assertEquals(themeElem.name.toLowerCase(Locale.ROOT), cell.getStringCellValue(),
                    "Wrong theme at " + ref + " in " + whatWorkbook);

                // Fonts are theme-based in their colours
                XSSFFont font = cell.getCellStyle().getFont();
                CTColor ctColor = font.getCTFont().getColorArray(0);
                assertNotNull(ctColor);
                assertTrue(ctColor.isSetTheme());
                assertEquals(themeElem.idx, ctColor.getTheme());

                // Get the colour, via the theme
                XSSFColor color = font.getXSSFColor();
                // Theme colours aren't tinted
                assertFalse(color.hasTint());
                // Check the RGB part (no tint)
                assertEquals(rgbExpected[expectedThemeIdx], Hex.encodeHexString(color.getRGB()),
                    "Wrong theme colour " + themeElem.name + " on " + whatWorkbook);
                long themeIdx = font.getCTFont().getColorArray(0).getTheme();
                assertEquals(expectedThemeIdx, themeIdx,
                    "Wrong theme index " + expectedThemeIdx + " on " + whatWorkbook);

                if (createFiles) {
                    XSSFCellStyle cs = row.getSheet().getWorkbook().createCellStyle();
                    cs.setFillForegroundColor(color);
                    cs.setFillPattern(FillPatternType.SOLID_FOREGROUND);
                    row.createCell(1).setCellStyle(cs);
                }
            }

            if (createFiles) {
                FileOutputStream fos = new FileOutputStream("Generated_"+whatWorkbook);
                workbook.write(fos);
                fos.close();
            }
        }

        simpleRS.close();
        simple.close();
        complexRS.close();
        complex.close();
    }

    /**
     * Ensure that, for a file with themes, we can correctly
     *  read both the themed and non-themed colours back.
     * Column A = Theme Foreground
     * Column B = Theme Foreground
     * Column C = Explicit Colour Foreground
     * Column E = Explicit Colour Background, Black Foreground
     * Column G = Conditional Formatting Backgrounds
     *
     * Note - Grey Row has an odd way of doing the styling...
     */
    @Test
    void themedAndNonThemedColours() throws IOException {
        try (XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook(testFileComplex)) {
            XSSFSheet sheet = wb.getSheetAt(0);
            ThemesTable themesTable = wb.getTheme();
            XSSFColor color1 = themesTable.getThemeColor(0);
            assertNotNull(color1);
            assertNotEquals(0, color1.getRGB().length);
            List<PackagePart> themeParts = wb.getPackage().getPartsByContentType(XSSFRelation.THEME.getContentType());
            assertEquals(1, themeParts.size());
            try (InputStream themeStream = themeParts.get(0).getInputStream()) {
                ThemesTable themesTable2 = new ThemesTable(themeStream);
                assertArrayEquals(color1.getRGB(), themesTable2.getThemeColor(0).getRGB());
            }

            String[] names = {"White", "Black", "Grey", "Dark Blue", "Blue", "Red", "Green"};
            String[] explicitFHexes = {"FFFFFFFF", "FF000000", "FFC0C0C0", "FF002060",
                    "FF0070C0", "FFFF0000", "FF00B050"};
            String[] explicitBHexes = {"FFFFFFFF", "FF000000", "FFC0C0C0", "FF002060",
                    "FF0000FF", "FFFF0000", "FF00FF00"};
            assertEquals(7, names.length);

            // Check the non-CF colours in Columns A, B, C and E
            for (int rn = 1; rn < 8; rn++) {
                int idx = rn - 1;
                XSSFRow row = sheet.getRow(rn);
                assertNotNull(row, "Missing row " + rn);

                // Theme cells come first
                XSSFCell themeCell = row.getCell(0);
                ThemeElement themeElem = ThemeElement.byId(idx);
                assertCellContents(themeElem.name, themeCell);

                // Sanity check names
                assertCellContents(names[idx], row.getCell(1));
                assertCellContents(names[idx], row.getCell(2));
                assertCellContents(names[idx], row.getCell(4));


                // Check the colours

                //  A: Theme Based, Foreground
                XSSFCellStyle style = themeCell.getCellStyle();
                XSSFColor color = style.getFont().getXSSFColor();
                assertTrue(color.isThemed());
                assertEquals(idx, color.getTheme());
                assertEquals(rgbExpected[idx], Hex.encodeHexString(color.getRGB()));

                //  B: Theme Based, Foreground
                XSSFCell cell = row.getCell(1);
                style = cell.getCellStyle();
                color = style.getFont().getXSSFColor();
                assertTrue(color.isThemed());
                if (idx != 2) {
                    assertEquals(idx, color.getTheme());
                    assertEquals(rgbExpected[idx], Hex.encodeHexString(color.getRGB()));
                } else {
                    assertEquals(1, color.getTheme());
                    assertEquals(0.50, color.getTint(), 0.001);
                }

                //  C: Explicit, Foreground
                cell = row.getCell(2);
                style = cell.getCellStyle();
                color = style.getFont().getXSSFColor();
                assertFalse(color.isThemed());
                assertEquals(explicitFHexes[idx], color.getARGBHex());

                // E: Explicit Background, Foreground all Black
                cell = row.getCell(4);
                style = cell.getCellStyle();

                color = style.getFont().getXSSFColor();
                assertTrue(color.isThemed());
                assertEquals("FF000000", color.getARGBHex());

                color = style.getFillForegroundXSSFColor();
                assertFalse(color.isThemed());
                assertEquals(explicitBHexes[idx], color.getARGBHex());
                color = style.getFillBackgroundColorColor();
                assertFalse(color.isThemed());
                assertNull(color.getARGBHex());
            }
        }

        // Check the CF colours
        // TODO
    }
    private static void assertCellContents(String expected, XSSFCell cell) {
        assertNotNull(cell);
        assertEquals(expected.toLowerCase(Locale.ROOT),
                     cell.getStringCellValue().toLowerCase(Locale.ROOT));
    }

    @Test
    @SuppressWarnings("resource")
    void testAddNew() {
        XSSFWorkbook wb = new XSSFWorkbook();
        wb.createSheet();
        assertNull(wb.getTheme());

        StylesTable styles = wb.getStylesSource();
        assertNull(styles.getTheme());

        styles.ensureThemesTable();

        assertNotNull(styles.getTheme());
        assertNotNull(wb.getTheme());

        wb = XSSFTestDataSamples.writeOutAndReadBack(wb);
        styles = wb.getStylesSource();
        assertNotNull(styles.getTheme());
        assertNotNull(wb.getTheme());
    }
}