/**
 * Logback: the reliable, generic, fast and flexible logging framework.
 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
 *
 * This program and the accompanying materials are dual-licensed under
 * either the terms of the Eclipse Public License v1.0 as published by
 * the Eclipse Foundation
 *
 *   or (per the licensee's choosing)
 *
 * under the terms of the GNU Lesser General Public License version 2.1
 * as published by the Free Software Foundation.
 */
package ch.qos.logback.core.joran.action;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Stack;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.xml.sax.SAXParseException;

import ch.qos.logback.core.Context;
import ch.qos.logback.core.ContextBase;
import ch.qos.logback.core.joran.TrivialConfigurator;
import ch.qos.logback.core.joran.action.ext.StackAction;
import ch.qos.logback.core.joran.spi.ElementSelector;
import ch.qos.logback.core.joran.spi.JoranException;
import ch.qos.logback.core.status.Status;
import ch.qos.logback.core.status.StatusChecker;
import ch.qos.logback.core.testUtil.FileTestUtil;
import ch.qos.logback.core.testUtil.RandomUtil;
import ch.qos.logback.core.util.CoreTestConstants;
import ch.qos.logback.core.util.StatusPrinter;

public class IncludeActionTest {

    final static String INCLUDE_KEY = "includeKey";
    final static String SUB_FILE_KEY = "subFileKey";
    final static String SECOND_FILE_KEY = "secondFileKey";

    Context context = new ContextBase();
    StatusChecker statusChecker = new StatusChecker(context);
    TrivialConfigurator tc;

    static final String INCLUSION_DIR_PREFIX = CoreTestConstants.JORAN_INPUT_PREFIX + "inclusion/";

    static final String TOP_BY_FILE = INCLUSION_DIR_PREFIX + "topByFile.xml";

    static final String TOP_OPTIONAL = INCLUSION_DIR_PREFIX + "topOptional.xml";

    static final String TOP_OPTIONAL_RESOURCE = INCLUSION_DIR_PREFIX + "topOptionalResource.xml";

    static final String INTERMEDIARY_FILE = INCLUSION_DIR_PREFIX + "intermediaryByFile.xml";

    static final String SUB_FILE = INCLUSION_DIR_PREFIX + "subByFile.xml";

    static final String MULTI_INCLUDE_BY_FILE = INCLUSION_DIR_PREFIX + "multiIncludeByFile.xml";

    static final String SECOND_FILE = INCLUSION_DIR_PREFIX + "second.xml";

    static final String TOP_BY_URL = INCLUSION_DIR_PREFIX + "topByUrl.xml";

    static final String INCLUDE_BY_RESOURCE = INCLUSION_DIR_PREFIX + "topByResource.xml";

    static final String INCLUDED_FILE = INCLUSION_DIR_PREFIX + "included.xml";
    static final String URL_TO_INCLUDE = "file:./" + INCLUDED_FILE;

    static final String INVALID = INCLUSION_DIR_PREFIX + "invalid.xml";

    static final String INCLUDED_AS_RESOURCE = "asResource/joran/inclusion/includedAsResource.xml";

    int diff = RandomUtil.getPositiveInt();

    StackAction stackAction = new StackAction();

    @Before
    public void setUp() throws Exception {
        FileTestUtil.makeTestOutputDir();
        HashMap<ElementSelector, Action> rulesMap = new HashMap<ElementSelector, Action>();
        rulesMap.put(new ElementSelector("x"), new NOPAction());
        rulesMap.put(new ElementSelector("x/include"), new IncludeAction());
        rulesMap.put(new ElementSelector("x/stack"), stackAction);

        tc = new TrivialConfigurator(rulesMap);
        tc.setContext(context);
    }

    @After
    public void tearDown() throws Exception {
        StatusPrinter.printInCaseOfErrorsOrWarnings(context);
        context = null;
        System.clearProperty(INCLUDE_KEY);
        System.clearProperty(SECOND_FILE_KEY);
        System.clearProperty(SUB_FILE_KEY);
        // StackAction.reset();
    }

    @Test
    public void basicFile() throws JoranException {
        System.setProperty(INCLUDE_KEY, INCLUDED_FILE);
        tc.doConfigure(TOP_BY_FILE);
        verifyConfig(new String[] { "IA", "IB" });
    }

    @Test
    public void optionalFile() throws JoranException {
        tc.doConfigure(TOP_OPTIONAL);
        verifyConfig(new String[] { "IA", "IB" });
        StatusPrinter.print(context);
    }

    @Test
    public void optionalResource() throws JoranException {
        tc.doConfigure(TOP_OPTIONAL_RESOURCE);
        verifyConfig(new String[] { "IA", "IB" });
        StatusPrinter.print(context);
        assertEquals(Status.INFO, statusChecker.getHighestLevel(0));
    }

    @Test
    public void basicResource() throws JoranException {
        System.setProperty(INCLUDE_KEY, INCLUDED_AS_RESOURCE);
        tc.doConfigure(INCLUDE_BY_RESOURCE);
        verifyConfig(new String[] { "AR_A", "AR_B" });
    }

    @Test
    public void basicURL() throws JoranException {
        System.setProperty(INCLUDE_KEY, URL_TO_INCLUDE);
        tc.doConfigure(TOP_BY_URL);
        verifyConfig(new String[] { "IA", "IB" });
    }

    @Test
    public void noFileFound() throws JoranException {
        System.setProperty(INCLUDE_KEY, "toto");
        tc.doConfigure(TOP_BY_FILE);
        assertEquals(Status.WARN, statusChecker.getHighestLevel(0));
    }

    @Test
    public void withCorruptFile() throws JoranException, IOException {
        String tmpOut = copyToTemp(INVALID);
        System.setProperty(INCLUDE_KEY, tmpOut);
        tc.doConfigure(TOP_BY_FILE);
        assertEquals(Status.ERROR, statusChecker.getHighestLevel(0));
        StatusPrinter.print(context);
        assertTrue(statusChecker.containsException(SAXParseException.class));

        // we like to erase the temp file in order to see
        // if http://jira.qos.ch/browse/LBCORE-122 was fixed
        File f = new File(tmpOut);
        assertTrue(f.exists());
        assertTrue(f.delete());

    }

    String copyToTemp(String in) throws IOException {
        FileInputStream fis = new FileInputStream(in);
        String out = CoreTestConstants.OUTPUT_DIR_PREFIX + "out" + diff;
        FileOutputStream fos = new FileOutputStream(out);
        int b;
        while ((b = fis.read()) != -1) {
            fos.write(b);
        }
        fis.close();
        fos.close();
        return out;
    }

    @Test
    public void malformedURL() throws JoranException {
        System.setProperty(INCLUDE_KEY, "htp://logback.qos.ch");
        tc.doConfigure(TOP_BY_URL);
        assertEquals(Status.ERROR, statusChecker.getHighestLevel(0));
        assertTrue(statusChecker.containsException(MalformedURLException.class));
    }

    @Test
    public void unknownURL() throws JoranException {
        System.setProperty(INCLUDE_KEY, "http://logback2345.qos.ch");
        tc.doConfigure(TOP_BY_URL);
        assertEquals(Status.WARN, statusChecker.getHighestLevel(0));
    }

    @Test
    public void nestedInclude() throws JoranException {
        System.setProperty(SUB_FILE_KEY, SUB_FILE);
        System.setProperty(INCLUDE_KEY, INTERMEDIARY_FILE);
        tc.doConfigure(TOP_BY_FILE);
        Stack<String> witness = new Stack<String>();
        witness.push("a");
        witness.push("b");
        witness.push("c");
        assertEquals(witness, stackAction.getStack());
    }

    @Test
    public void multiInclude() throws JoranException {
        System.setProperty(INCLUDE_KEY, INCLUDED_FILE);
        System.setProperty(SECOND_FILE_KEY, SECOND_FILE);
        tc.doConfigure(MULTI_INCLUDE_BY_FILE);
        verifyConfig(new String[] { "IA", "IB", "SECOND" });
    }

    void verifyConfig(String[] expected) {
        Stack<String> witness = new Stack<String>();
        witness.addAll(Arrays.asList(expected));
        assertEquals(witness, stackAction.getStack());
    }

}
