/*
 * 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.
 */

/* $Id$ */

package org.apache.fop.fotreetest;

import java.io.File;
import java.util.List;

import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.XMLFilterImpl;

import org.apache.fop.apps.FOUserAgent;
import org.apache.fop.apps.Fop;
import org.apache.fop.apps.FopFactory;
import org.apache.fop.apps.FopFactoryConfigurator;
import org.apache.fop.fotreetest.ext.TestElementMapping;
import org.apache.fop.util.ConsoleEventListenerForTests;

/**
 * Test driver class for FO tree tests.
 */
public class FOTreeTester {

    private FopFactory fopFactory = FopFactory.newInstance();

    /**
     * Main constructor
     */
    public FOTreeTester() {
        fopFactory.addElementMapping(new TestElementMapping());
    }

    /**
     * Runs a test.
     * @param testFile the test file.
     * @throws Exception if a test or FOP itself fails
     */
    public void runTest(File testFile) throws Exception {
        ResultCollector collector = ResultCollector.getInstance();
        collector.reset();

        SAXParserFactory spf = SAXParserFactory.newInstance();
        spf.setNamespaceAware(true);
        spf.setValidating(false);
        SAXParser parser = spf.newSAXParser();
        XMLReader reader = parser.getXMLReader();

        //Resetting values modified by processing instructions
        fopFactory.setBreakIndentInheritanceOnReferenceAreaBoundary(
                FopFactoryConfigurator.DEFAULT_BREAK_INDENT_INHERITANCE);
        fopFactory.setSourceResolution(FopFactoryConfigurator.DEFAULT_SOURCE_RESOLUTION);

        FOUserAgent ua = fopFactory.newFOUserAgent();
        ua.setBaseURL(testFile.getParentFile().toURI().toURL().toString());
        ua.setFOEventHandlerOverride(new DummyFOEventHandler(ua));
        ua.getEventBroadcaster().addEventListener(
                new ConsoleEventListenerForTests(testFile.getName()));

        //Used to set values in the user agent through processing instructions
        reader = new PIListener(reader, ua);

        Fop fop = fopFactory.newFop(ua);

        reader.setContentHandler(fop.getDefaultHandler());
        reader.setDTDHandler(fop.getDefaultHandler());
        reader.setErrorHandler(fop.getDefaultHandler());
        reader.setEntityResolver(fop.getDefaultHandler());
        try {
            reader.parse(testFile.toURI().toURL().toExternalForm());
        } catch (Exception e) {
            collector.notifyError(e.getLocalizedMessage());
            throw e;
        }

        List results = collector.getResults();
        if (results.size() > 0) {
            for (int i = 0; i < results.size(); i++) {
                System.out.println((String)results.get(i));
            }
            throw new IllegalStateException((String)results.get(0));
        }
    }

    private class PIListener extends XMLFilterImpl {

        private FOUserAgent userAgent;

        public PIListener(XMLReader parent, FOUserAgent userAgent) {
            super(parent);
            this.userAgent = userAgent;
        }

        /** @see org.xml.sax.helpers.XMLFilterImpl */
        public void processingInstruction(String target, String data) throws SAXException {
            if ("fop-useragent-break-indent-inheritance".equals(target)) {
                userAgent.getFactory().setBreakIndentInheritanceOnReferenceAreaBoundary(
                        Boolean.valueOf(data).booleanValue());
            } else if ("fop-source-resolution".equals(target)) {
                userAgent.getFactory().setSourceResolution(Float.parseFloat(data));
            }
            super.processingInstruction(target, data);
        }

    }

}