/* ====================================================================
   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.xddf.usermodel.chart;

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

import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.ss.util.SheetBuilder;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.junit.jupiter.api.Test;

/**
 * Tests for {@link XDDFDataSourcesFactory}.
 */
class TestXDDFDataSourcesFactory {

    private static final Object[][] numericCells = {
            {0.0,      1.0,       2.0,     3.0,      4.0},
            {0.0, "=B1*2",  "=C1*2", "=D1*2", "=E1*2"}
    };

    private static final Object[][] stringCells = {
            {  1,    2,    3,   4,    5},
            {"A", "B", "C", "D", "E"}
    };

    private static final Object[][] mixedCells = {
            {1.0, "2.0", 3.0, "4.0", 5.0, "6.0"}
    };

    @Test
    void testNumericArrayDataSource() {
        Double[] doubles = new Double[]{1.0, 2.0, 3.0, 4.0, 5.0};
        XDDFDataSource<Double> doubleDataSource = XDDFDataSourcesFactory.fromArray(doubles, null);
        assertTrue(doubleDataSource.isNumeric());
        assertFalse(doubleDataSource.isReference());
        assertDataSourceIsEqualToArray(doubleDataSource, doubles);
    }

    @Test
    void testStringArrayDataSource() {
        String[] strings = new String[]{"one", "two", "three", "four", "five"};
        XDDFDataSource<String> stringDataSource = XDDFDataSourcesFactory.fromArray(strings, null);
        assertFalse(stringDataSource.isNumeric());
        assertFalse(stringDataSource.isReference());
        assertDataSourceIsEqualToArray(stringDataSource, strings);
    }

    @Test
    void testNumericCellDataSource() {
        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet = (XSSFSheet) new SheetBuilder(wb, numericCells).build();
        CellRangeAddress numCellRange = CellRangeAddress.valueOf("A2:E2");
        XDDFDataSource<Double> numDataSource = XDDFDataSourcesFactory.fromNumericCellRange(sheet, numCellRange);
        assertTrue(numDataSource.isReference());
        assertTrue(numDataSource.isNumeric());
        assertEquals(numericCells[0].length, numDataSource.getPointCount());
        for (int i = 0; i < numericCells[0].length; ++i) {
            assertEquals(((Double) numericCells[0][i]) * 2,
                    numDataSource.getPointAt(i), 0.00001);
        }
    }

    @Test
    void testStringCellDataSource() {
        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet = (XSSFSheet) new SheetBuilder(wb, stringCells).build();
        CellRangeAddress numCellRange = CellRangeAddress.valueOf("A2:E2");
        XDDFDataSource<String> numDataSource = XDDFDataSourcesFactory.fromStringCellRange(sheet, numCellRange);
        assertTrue(numDataSource.isReference());
        assertFalse(numDataSource.isNumeric());
        assertEquals(numericCells[0].length, numDataSource.getPointCount());
        for (int i = 0; i < stringCells[1].length; ++i) {
            assertEquals(stringCells[1][i], numDataSource.getPointAt(i));
        }
    }

    @Test
    void testMixedCellDataSource() {
        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet = (XSSFSheet) new SheetBuilder(wb, mixedCells).build();
        CellRangeAddress mixedCellRange = CellRangeAddress.valueOf("A1:F1");
        XDDFDataSource<String> strDataSource = XDDFDataSourcesFactory.fromStringCellRange(sheet, mixedCellRange);
        XDDFDataSource<Double> numDataSource = XDDFDataSourcesFactory.fromNumericCellRange(sheet, mixedCellRange);
        for (int i = 0; i < mixedCells[0].length; ++i) {
            if (i % 2 == 0) {
                assertNull(strDataSource.getPointAt(i));
                assertEquals(((Double) mixedCells[0][i]),
                        numDataSource.getPointAt(i), 0.00001);
            } else {
                assertNull(numDataSource.getPointAt(i));
                assertEquals(mixedCells[0][i], strDataSource.getPointAt(i));
            }
        }
    }

    @Test
    void testIOBExceptionOnInvalidIndex() {
        XSSFWorkbook wb = new XSSFWorkbook();
        XSSFSheet sheet = (XSSFSheet) new SheetBuilder(wb, numericCells).build();
        CellRangeAddress rangeAddress = CellRangeAddress.valueOf("A2:E2");
        XDDFDataSource<Double> numDataSource = XDDFDataSourcesFactory.fromNumericCellRange(sheet, rangeAddress);
        IndexOutOfBoundsException exception = null;
        try {
            numDataSource.getPointAt(-1);
        } catch (IndexOutOfBoundsException e) {
            exception = e;
        }
        assertNotNull(exception);

        exception = null;
        try {
            numDataSource.getPointAt(numDataSource.getPointCount());
        } catch (IndexOutOfBoundsException e) {
            exception = e;
        }
        assertNotNull(exception);
    }

    private <T> void assertDataSourceIsEqualToArray(XDDFDataSource<T> ds, T[] array) {
        assertEquals(ds.getPointCount(), array.length);
        for (int i = 0; i < array.length; ++i) {
            assertEquals(ds.getPointAt(i), array[i]);
        }
    }
}