package org.apache.maven.surefire.its.fixture;

/*
 * 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 org.apache.maven.plugin.surefire.log.api.ConsoleLogger;
import org.apache.maven.plugin.surefire.log.api.PrintStreamLogger;
import org.apache.maven.plugins.surefire.report.ReportTestSuite;
import org.apache.maven.plugins.surefire.report.SurefireReportParser;

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

import static java.lang.Double.parseDouble;
import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertFalse;
import static junit.framework.Assert.assertTrue;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.junit.Assume.assumeTrue;

/**
 *
 */
@SuppressWarnings( {"JavaDoc"} )
public final class HelperAssertions
{
    private HelperAssertions()
    {
        throw new IllegalStateException( "no instantiable constructor" );
    }

    /**
     * assert that the reports in the specified testDir have the right summary statistics
     */
    public static void assertTestSuiteResults( int total, int errors, int failures, int skipped, File testDir )
    {
        IntegrationTestSuiteResults suite = parseTestResults( testDir );
        assertTestSuiteResults( total, errors, failures, skipped, suite );
    }

    public static void assertTestSuiteResults( int total, int errors, int failures, int skipped, int flakes,
                                               File testDir )
    {
        IntegrationTestSuiteResults suite = parseTestResults( testDir );
        assertTestSuiteResults( total, errors, failures, skipped, flakes, suite );
    }

    public static void assertTestSuiteResults( int total, File testDir )
    {
        IntegrationTestSuiteResults suite = parseTestResults( testDir );
        assertTestSuiteResults( total, suite );
    }

    /**
     * assert that the reports in the specified testDir have the right summary statistics
     */
    public static void assertIntegrationTestSuiteResults( int total, int errors, int failures, int skipped,
                                                          File testDir )
    {
        IntegrationTestSuiteResults suite = parseIntegrationTestResults( testDir );
        assertTestSuiteResults( total, errors, failures, skipped, suite );
    }

    public static void assertIntegrationTestSuiteResults( int total, File testDir )
    {
        IntegrationTestSuiteResults suite = parseIntegrationTestResults( testDir );
        assertTestSuiteResults( total, suite );
    }

    public static void assertTestSuiteResults( int total, int errors, int failures, int skipped,
                                               IntegrationTestSuiteResults actualSuite )
    {
        assertEquals( "wrong number of tests", total, actualSuite.getTotal() );
        assertEquals( "wrong number of errors", errors, actualSuite.getErrors() );
        assertEquals( "wrong number of failures", failures, actualSuite.getFailures() );
        assertEquals( "wrong number of skipped", skipped, actualSuite.getSkipped() );
    }

    public static void assertTestSuiteResults( int total, IntegrationTestSuiteResults actualSuite )
    {
        assertEquals( "wrong number of tests", total, actualSuite.getTotal() );
    }

    public static void assertTestSuiteResults( int total, int errors, int failures, int skipped, int flakes,
                                               IntegrationTestSuiteResults actualSuite )
    {
        assertTestSuiteResults( total, errors, failures, skipped, actualSuite );
        assertEquals( "wrong number of flaky tests", flakes, actualSuite.getFlakes() );
    }

    public static IntegrationTestSuiteResults parseTestResults( File... testDirs )
    {
        List<ReportTestSuite> reports = extractReports( testDirs );
        return parseReportList( reports );
    }

    private static IntegrationTestSuiteResults parseIntegrationTestResults( File... testDirs )
    {
        List<ReportTestSuite> reports = extractITReports( testDirs );
        return parseReportList( reports );
    }

    /**
     * Converts a list of ReportTestSuites into an IntegrationTestSuiteResults object, suitable for summary assertions
     */
    public static IntegrationTestSuiteResults parseReportList( List<ReportTestSuite> reports )
    {
        assertFalse( "No reports!", reports.isEmpty() );
        int total = 0, errors = 0, failures = 0, skipped = 0, flakes = 0;
        for ( ReportTestSuite report : reports )
        {
            total += report.getNumberOfTests();
            errors += report.getNumberOfErrors();
            failures += report.getNumberOfFailures();
            skipped += report.getNumberOfSkipped();
            flakes += report.getNumberOfFlakes();
        }
        return new IntegrationTestSuiteResults( total, errors, failures, skipped, flakes );
    }

    public static List<ReportTestSuite> extractReports( File... testDirs )
    {
        List<File> reportsDirs = new ArrayList<>();
        for ( File testDir : testDirs )
        {
            File reportsDir = new File( testDir, "target/surefire-reports" );
            assertTrue( "Reports directory is missing: " + reportsDir.getAbsolutePath(), reportsDir.exists() );
            reportsDirs.add( reportsDir );
        }
        ConsoleLogger logger = new PrintStreamLogger( System.out );
        SurefireReportParser parser = new SurefireReportParser( reportsDirs, Locale.ROOT, logger );
        try
        {
            return parser.parseXMLReportFiles();
        }
        catch ( Exception e )
        {
            throw new RuntimeException( "Couldn't parse XML reports", e );
        }
    }

    private static List<ReportTestSuite> extractITReports( File... testDirs )
    {
        List<File> reportsDirs = new ArrayList<>();
        for ( File testDir : testDirs )
        {
            File reportsDir = new File( testDir, "target/failsafe-reports" );
            assertTrue( "Reports directory is missing: " + reportsDir.getAbsolutePath(), reportsDir.exists() );
            reportsDirs.add( reportsDir );
        }
        ConsoleLogger logger = new PrintStreamLogger( System.out );
        SurefireReportParser parser = new SurefireReportParser( reportsDirs, Locale.ROOT, logger );
        try
        {
            return parser.parseXMLReportFiles();
        }
        catch ( Exception e )
        {
            throw new RuntimeException( "Couldn't parse XML reports", e );
        }
    }

    public static void assumeJavaVersion( double expectedVersion )
    {
        String thisVersion = System.getProperty( "java.specification.version" );
        assumeTrue( "java.specification.version: " + thisVersion, parseDouble( thisVersion ) >= expectedVersion );
    }

    public static void assumeJavaMaxVersion( double expectedMaxVersion )
    {
        String thisVersion = System.getProperty( "java.specification.version" );
        assumeTrue( "java.specification.version: " + thisVersion, parseDouble( thisVersion ) <= expectedMaxVersion );
    }

    public static void assumeJavaVersionExcluded( double excludedVersion )
    {
        String thisVersion = System.getProperty( "java.specification.version" );
        assumeTrue( "java.specification.version: " + thisVersion, parseDouble( thisVersion ) != excludedVersion );
    }

    public static String convertUnicodeToUTF8( String unicode )
    {
        return new String( unicode.getBytes( UTF_8 ), UTF_8 );
    }
}
