package org.apache.maven.plugins.checkstyle;

/*
 * 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.
 */


import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Locale;
import java.util.ResourceBundle;

import org.apache.maven.artifact.DependencyResolutionRequiredException;
import org.apache.maven.plugin.descriptor.PluginDescriptor;
import org.codehaus.plexus.util.FileUtils;

/**
 * @author Edwin Punzalan
 *
 */
public class CheckstyleReportTest
    extends AbstractCheckstyleTestCase
{
    public void testNoSource()
        throws Exception
    {
        File generatedReport = generateReport( "checkstyle", "no-source-plugin-config.xml" );
        assertFalse( FileUtils.fileExists( generatedReport.getAbsolutePath() ) );
    }

    public void testMinConfiguration()
        throws Exception
    {
        generateReport( "min-plugin-config.xml" );
    }

    public void testCustomConfiguration()
        throws Exception
    {
        generateReport( "custom-plugin-config.xml" );
    }

    public void testUseFile()
        throws Exception
    {
        generateReport( "useFile-plugin-config.xml" );
    }

    public void testNoRulesSummary()
        throws Exception
    {
        generateReport( "no-rules-plugin-config.xml" );
    }

    public void testNoSeveritySummary()
        throws Exception
    {
        generateReport( "no-severity-plugin-config.xml" );
    }

    public void testNoFilesSummary()
        throws Exception
    {
        generateReport( "no-files-plugin-config.xml" );
    }

    public void testFailOnError()
    {
        try
        {
            generateReport( "fail-on-error-plugin-config.xml" );

            fail( "Must throw exception on errors" );
        }
        catch ( Exception e )
        {
            // expected
        }
    }

    public void testDependencyResolutionException()
    {
        try
        {
            generateReport( "dep-resolution-exception-plugin-config.xml" );

            fail( "Must throw exception on errors" );
        }
        catch ( Exception e )
        {
            if ( !( e.getCause().getCause().getCause() instanceof DependencyResolutionRequiredException ) )
            {
                e.printStackTrace();
                fail( "Must throw exception DependencyResolutionRequiredException on errors and not " + e.getClass().getName() + ", " + e.getMessage() );
            }
        }
    }

    public void testTestSourceDirectory()
        throws Exception
    {
        generateReport( "test-source-directory-plugin-config.xml" );
    }

    /**
     * Read the contents of the specified file object into a string
     *
     * @param file the file to be read
     * @return a String object that contains the contents of the file
     * @throws java.io.IOException
     */
    private String readFile( File file )
        throws IOException
    {
        String strTmp;
        StringBuilder str = new StringBuilder( (int) file.length() );
        try ( BufferedReader in = new BufferedReader( new FileReader( file ) ) )
        {
            while ( ( strTmp = in.readLine() ) != null )
            {
                str.append( ' ' );
                str.append( strTmp );
            }
        }

        return str.toString();
    }

    private void generateReport( String pluginXml )
        throws Exception
    {
        File pluginXmlFile = new File( getBasedir(), "src/test/resources/plugin-configs/" + pluginXml );
        ResourceBundle bundle =
            ResourceBundle.getBundle( "checkstyle-report", Locale.getDefault(), this.getClassLoader() );

        CheckstyleReport mojo = createReportMojo( "checkstyle", pluginXmlFile );

        PluginDescriptor descriptorStub = new PluginDescriptor();
        descriptorStub.setGroupId( "org.apache.maven.plugins" );
        descriptorStub.setArtifactId( "maven-checkstyle-plugin" );
        setVariableValueToObject( mojo, "plugin", descriptorStub );

        File generatedReport = generateReport( mojo, pluginXmlFile );
        assertTrue( FileUtils.fileExists( generatedReport.getAbsolutePath() ) );

        File outputFile = (File) getVariableValueFromObject( mojo, "outputFile" );
        assertNotNull( "Test output file", outputFile );
        assertTrue( "Test output file exists", outputFile.exists() );

        String cacheFile = (String) getVariableValueFromObject( mojo, "cacheFile" );
        if ( cacheFile != null )
        {
            assertTrue( "Test cache file exists", new File( cacheFile ).exists() );
        }

        File outputDir = mojo.getReportOutputDirectory();

        Boolean rss = (Boolean) getVariableValueFromObject( mojo, "enableRSS" );
        if (rss)
        {
            File rssFile = new File( outputDir, "checkstyle.rss" );
            assertTrue( "Test rss file exists", rssFile.exists() );
        }

        File useFile = (File) getVariableValueFromObject( mojo, "useFile" );
        if ( useFile != null )
        {
            assertTrue( "Test useFile exists", useFile.exists() );
        }

        String str = readFile( generatedReport );

        boolean searchHeaderFound =
            str.contains( getHtmlHeader( bundle.getString( "report.checkstyle.rules" ) ) );
        Boolean rules = (Boolean) getVariableValueFromObject( mojo, "enableRulesSummary" );
        if (rules)
        {
            assertTrue( "Test for Rules Summary", searchHeaderFound );
        }
        else
        {
            assertFalse( "Test for Rules Summary", searchHeaderFound );
        }

        searchHeaderFound = str.contains( getHtmlHeader( bundle.getString( "report.checkstyle.summary" ) ) );
        Boolean severity = (Boolean) getVariableValueFromObject( mojo, "enableSeveritySummary" );
        if (severity)
        {
            assertTrue( "Test for Severity Summary", searchHeaderFound );
        }
        else
        {
            assertFalse( "Test for Severity Summary", searchHeaderFound );
        }

        searchHeaderFound = str.contains( getHtmlHeader( bundle.getString( "report.checkstyle.files" ) ) );
        Boolean files = (Boolean) getVariableValueFromObject( mojo, "enableFilesSummary" );
        if (files)
        {
            assertTrue( "Test for Files Summary", searchHeaderFound );
        }
        else
        {
            assertFalse( "Test for Files Summary", searchHeaderFound );
        }
    }

    private static String getHtmlHeader( String s )
    {
        return ">" + s + "</h2>";
    }
}