/*   Copyright 2004 The Apache Software Foundation
 *
 *   Licensed 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 xmlcursor.xpath.common;

import org.apache.xmlbeans.XmlCursor;
import org.apache.xmlbeans.XmlObject;
import org.junit.jupiter.api.Test;
import xmlcursor.common.Common;

import static org.junit.jupiter.api.Assertions.*;
import static xmlcursor.common.BasicCursorTestCase.*;

/**
 * Verifies XPath using functions
 * http://www.w3schools.com/xpath/xpath_functions.asp
 */

public class XPathFunctionAuxTest {

    @Test
    void testFunctionCount_caseB() throws Exception {
        String ex1Simple = "count(//cd)";
        String ex1R1 = Common.XMLFRAG_BEGINTAG + "26" + Common.XMLFRAG_ENDTAG;
        XmlObject[] exXml1 = {obj(ex1R1)};

        try (XmlCursor x1 = jcur("xbean/xmlcursor/xpath/cdcatalog.xml")) {
            x1.selectPath(ex1Simple);
            XPathCommon.display(x1);
            XPathCommon.compare(x1, exXml1);
        }
    }

    @Test
    void testFunctionConcat_caseB() throws Exception {
        String sXml =
            "<foo><bar><price at=\"val0\">3.00</price>" +
            "<price at=\"val1\">2</price></bar><bar1>3.00</bar1></foo>";
        String sXPath =
            "concat(name(//bar[position()=1]/*[position()=last()])," +
            "//price[position()=1]/text())";
        String sExpected = Common.wrapInXmlFrag("price3.00");
        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionStringLength_caseB() throws Exception {
        String sXml = "<foo><bar><price at=\"val0\">3.00</price><price at=\"val1\">2</price></bar><bar1>3.00</bar1></foo>";
        String sXPath = "string-length(name(//bar/*[last()]))";
        String sExpected = Common.wrapInXmlFrag("price".length() + "");
        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionSubString_caseB() throws Exception {
        String sXml = "<foo><bar><price at=\"val0\">3.00</price><price at=\"val1\">2</price></bar><bar1>3.00</bar1></foo>";
        String sXPath = "substring(name(//bar[position()=1]/*[position()=1]),3,3)";
        String sExpected = Common.wrapInXmlFrag("ice");

        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(XmlCursor.TokenType.TEXT, m_xc.currentTokenType());
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionSubStringAfter_caseB() throws Exception {
        String sXml = "<foo><bar><price at=\"val0\">3.00</price><price at=\"val1\">2</price></bar><bar1>3.00</bar1></foo>";
        String sXPath = "substring-after(name(//bar[position()=1]/*[position()=1]),'pr')";
        String sExpected = Common.wrapInXmlFrag("ice");

        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionSubStringBefore_caseB() throws Exception {
        String sXml = "<foo><bar><price at=\"val0\">3.00</price><price at=\"val1\">2</price></bar><bar1>3.00</bar1></foo>";
        String sXPath = "substring-before(" +
                        "name(//bar[position()=1]/*[position()=1]),'ice')";
        String sExpected = Common.wrapInXmlFrag("pr");

        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionTranslate_caseB() throws Exception {
        String sXml = "<foo><bar><price at=\"val0\">3.00</price><price at=\"val1\">2</price></bar><bar1>3.00</bar1></foo>";
        String sXPath = "translate(//bar[position()=1]/price[position()=1]/text()," +
                        "'200'," +
                        "'654')";//0 is now 5 &&4?
        String sExpected = Common.wrapInXmlFrag("3.55");
        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionNumber_caseB() throws Exception {
        String sXml = "<foo><bar><price at=\"val0\">3.00</price></bar><bar1>3.00</bar1></foo>";
        String sXPath = "number(//price/text())+10";
        String sExpected = Common.wrapInXmlFrag("13.0");
        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionRound_caseB() throws Exception {
        String sXml = "<foo><bar><price at=\"val0\">3.15</price><price at=\"val1\">2.87</price></bar><bar1>3.00</bar1></foo>";
        String sXPath = "round(//bar/price[position()=1]/text())";
        String sExpected = Common.wrapInXmlFrag("3.0");
        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionSum_caseB() throws Exception {
        String sXml = "<foo><bar><price at=\"val0\">3.00</price><price at=\"val1\">2</price></bar><bar1>3.00</bar1></foo>";
        String sXPath = "sum(//bar/price)";
        String sExpected = Common.wrapInXmlFrag("5.0");
        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }

    @Test
    void testFunctionBoolean_caseB_delete() throws Exception {
        String sXml =
            "<foo><bar>" +
            "<price at=\"val0\">3.00</price>" +
            "<price at=\"val1\">2</price>" +
            "</bar><bar1>3.00</bar1></foo>";
        String sXPath = "boolean(//foo/text())";

        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath(sXPath);
            System.out.println(m_xc.getSelectionCount());
            assertTrue(m_xc.toNextSelection());
            assertEquals(Common.wrapInXmlFrag("false"), m_xc.xmlText());
            assertFalse(m_xc.toNextSelection());
            m_xc.clearSelections();
            m_xc.toStartDoc();
            m_xc.selectPath("boolean(//price/text())");
            m_xc.toNextSelection();
        }
    }

    @Test
    void testFunctionBoolean_caseB() throws Exception {
        String sXml =
            "<foo><bar>" +
            "<price at=\"val0\">3.00</price>" +
            "<price at=\"val1\">2</price>" +
            "</bar><bar1>3.00</bar1></foo>";

        try (XmlCursor m_xc = cur(sXml);
             XmlCursor _startPos = m_xc.newCursor()) {
            m_xc.push();
            m_xc.selectPath("boolean(//foo/text())");
            m_xc.toNextSelection();
            assertEquals(Common.wrapInXmlFrag("false"), m_xc.xmlText());
            m_xc.clearSelections();

            //need to reset cursor since it's on a bool outside the doc
            m_xc.pop();
            //number
            m_xc.selectPath("boolean(//price/text())");
            m_xc.toNextSelection();
            assertEquals(Common.wrapInXmlFrag("true"), m_xc.xmlText());
            m_xc.clearSelections();

            //number
            assertTrue(m_xc.toCursor(_startPos));
            //boolean of Nan is false
            m_xc.selectPath("boolean(number(name(//price[position()=last()])))");
            m_xc.toNextSelection();
            assertEquals(Common.wrapInXmlFrag("false"), m_xc.xmlText());
            m_xc.clearSelections();

            //node-set
            m_xc.toCursor(_startPos);
            m_xc.selectPath("boolean(//price)");
            m_xc.toNextSelection();
            assertEquals(Common.wrapInXmlFrag("true"), m_xc.xmlText());
            m_xc.clearSelections();

            m_xc.toCursor(_startPos);
            m_xc.selectPath("boolean(//barK)");
            m_xc.toNextSelection();
            assertEquals(Common.wrapInXmlFrag("false"), m_xc.xmlText());
            m_xc.clearSelections();
        }
    }

    @Test
    void testFunctionFalse_caseB() throws Exception {
        String sXml = "<foo><price at=\"val0\">3.00</price></foo>";
        try (XmlCursor m_xc = cur(sXml)) {
            m_xc.selectPath("name(//*[boolean(text())=false()])");
            String sExpected = Common.wrapInXmlFrag("foo");
            m_xc.toNextSelection();
            assertEquals(sExpected, m_xc.xmlText());
        }
    }



}