/* ====================================================================
   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.record;

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

import org.apache.poi.ss.formula.ptg.AttrPtg;
import org.apache.poi.ss.formula.ptg.FuncVarPtg;
import org.apache.poi.ss.formula.ptg.IntPtg;
import org.apache.poi.ss.formula.ptg.Ptg;
import org.apache.poi.ss.formula.ptg.RefPtg;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.FormulaError;
import org.junit.jupiter.api.Test;

/**
 * Tests for {@link FormulaRecord}
 */
final class TestFormulaRecord {

	@Test
	void testCreateFormulaRecord () {
		FormulaRecord record = new FormulaRecord();
		record.setColumn((short)0);
		record.setRow(1);
		record.setXFIndex((short)4);

		assertEquals(record.getColumn(),0);
		assertEquals(record.getRow(), 1);
		assertEquals(record.getXFIndex(),4);
	}

	/**
	 * Make sure a NAN value is preserved
	 * This formula record is a representation of =1/0 at row 0, column 0
	 */
	@Test
	void testCheckNanPreserve() {
		byte[] formulaByte = {
			0, 0, 0, 0,
			0x0F, 0x00,

			// 8 bytes cached number is a 'special value' in this case
			0x02, // special cached value type 'error'
			0x00,
			FormulaError.DIV0.getCode(),
			0x00,
			0x00,
			0x00,
			(byte)0xFF,
			(byte)0xFF,

			0x00,
			0x00,
			0x00,
			0x00,

			(byte)0xE0, //18
			(byte)0xFC,
			// Ptgs
			0x07, 0x00, // encoded length
			0x1E, 0x01, 0x00, // IntPtg(1)
			0x1E, 0x00,	0x00, // IntPtg(0)
			0x06, // DividePtg

		};

		FormulaRecord record = new FormulaRecord(TestcaseRecordInputStream.create(FormulaRecord.sid, formulaByte));
		assertEquals(0, record.getRow(), "Row");
		assertEquals(0, record.getColumn(), "Column");
		//noinspection deprecation
		assertEquals(CellType.ERROR.getCode(), record.getCachedResultType());
		assertEquals(CellType.ERROR, record.getCachedResultTypeEnum());

		byte[] output = record.serialize();
		// includes sid+recordlength
		assertEquals(33, output.length, "Output size");

		for (int i = 5; i < 13;i++) {
			assertEquals(formulaByte[i], output[i+4], "FormulaByte NaN doesn't match");
		}
	}

	/**
	 * Tests to see if the shared formula cells properly reserialize the expPtg
	 */
	@Test
	void testExpFormula() {
		byte[] formulaByte = new byte[27];

		formulaByte[4] =(byte)0x0F;
		formulaByte[14]=(byte)0x08;
		formulaByte[18]=(byte)0xE0;
		formulaByte[19]=(byte)0xFD;
		formulaByte[20]=(byte)0x05;
		formulaByte[22]=(byte)0x01;
		FormulaRecord record = new FormulaRecord(TestcaseRecordInputStream.create(FormulaRecord.sid, formulaByte));
		assertEquals(0, record.getRow(), "Row");
		assertEquals(0, record.getColumn(), "Column");
		byte[] output = record.serialize();
		// includes sid+recordlength
		assertEquals(31, output.length, "Output size");
		assertEquals(1, output[26], "Offset 22");
	}

	@Test
	void testWithConcat() {
		// =CHOOSE(2,A2,A3,A4)
		byte[] data = {
				1, 0, 1, 0, 15, 0, 0, 0, 0, 0, 0, 0, 57,
				64, 0, 0, 12, 0, 12, -4, 46, 0,
				30, 2, 0,	// Int - 2
				25, 4, 3, 0, // Attr
					8, 0, 17, 0, 26, 0, // jumpTable
					35, 0, // chooseOffset
				36, 1, 0, 0, -64, // Ref - A2
				25, 8, 21, 0, // Attr
				36, 2, 0, 0, -64, // Ref - A3
				25,	8, 12, 0, // Attr
				36, 3, 0, 0, -64, // Ref - A4
				25, 8, 3, 0,  // Attr
				66, 4, 100, 0 // CHOOSE
		};
		RecordInputStream inp = TestcaseRecordInputStream.create(FormatRecord.sid, data);

		FormulaRecord fr = new FormulaRecord(inp);

		Ptg[] ptgs = fr.getParsedExpression();
		assertEquals(9, ptgs.length);
		assertEquals(IntPtg.class,	   ptgs[0].getClass());
		assertEquals(AttrPtg.class,	  ptgs[1].getClass());
		assertEquals(RefPtg.class, ptgs[2].getClass());
		assertEquals(AttrPtg.class,	  ptgs[3].getClass());
		assertEquals(RefPtg.class, ptgs[4].getClass());
		assertEquals(AttrPtg.class,	  ptgs[5].getClass());
		assertEquals(RefPtg.class, ptgs[6].getClass());
		assertEquals(AttrPtg.class,	  ptgs[7].getClass());
		assertEquals(FuncVarPtg.class,   ptgs[8].getClass());

		FuncVarPtg choose = (FuncVarPtg)ptgs[8];
		assertEquals("CHOOSE", choose.getName());
	}

	@Test
	void testReserialize() {
		FormulaRecord formulaRecord = new FormulaRecord();
		formulaRecord.setRow(1);
		formulaRecord.setColumn((short) 1);
		formulaRecord.setParsedExpression(new Ptg[] { new RefPtg("B$5"), });
		formulaRecord.setValue(3.3);
		byte[] ser = formulaRecord.serialize();
		assertEquals(31, ser.length);

		RecordInputStream in = TestcaseRecordInputStream.create(ser);
		FormulaRecord fr2 = new FormulaRecord(in);
		assertEquals(3.3, fr2.getValue(), 0.0);
		Ptg[] ptgs = fr2.getParsedExpression();
		assertEquals(1, ptgs.length);
		RefPtg rp = (RefPtg) ptgs[0];
		assertEquals("B$5", rp.toFormulaString());
	}

	/**
	 * Bug noticed while fixing 46479.  Operands of conditional operator ( ? : ) were swapped
	 * inside {@link FormulaRecord}
	 */
	@Test
	void testCachedValue_bug46479() {
		FormulaRecord fr0 = new FormulaRecord();
		FormulaRecord fr1 = new FormulaRecord();
		// test some other cached value types
		fr0.setValue(3.5);
		assertEquals(3.5, fr0.getValue(), 0.0);
		fr0.setCachedResultErrorCode(FormulaError.REF.getCode());
		assertEquals(FormulaError.REF.getCode(), fr0.getCachedErrorValue());

		fr0.setCachedResultBoolean(false);
		fr1.setCachedResultBoolean(true);
		assertFalse(fr0.getCachedBooleanValue() && !fr1.getCachedBooleanValue(), "Identified bug 46479c");
        assertFalse(fr0.getCachedBooleanValue());
        assertTrue(fr1.getCachedBooleanValue());
	}
}