/*
 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 8046817
 * @summary schemagen fails to generate xsd for enum types
 * @run main/othervm GenerateEnumSchema
 */
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.file.Paths;
import java.util.Scanner;

public class GenerateEnumSchema {

    private static final String SCHEMA_OUTPUT_FILENAME = "schema1.xsd";
    private static final File schemaOutputFile = new File(SCHEMA_OUTPUT_FILENAME);

    public static void main(String[] args) throws Exception, IOException {
        //Check schema generation for class type
        runSchemaGen("TestClassType.java");
        checkIfSchemaGenerated();
        checkSchemaContent("<xs:complexType name=\"testClassType\">");
        checkSchemaContent("<xs:element name=\"a\" type=\"xs:int\"/>");
        schemaOutputFile.delete();
        //Check schema generation for enum type
        runSchemaGen("TestEnumType.java");
        checkIfSchemaGenerated();
        checkSchemaContent("<xs:simpleType name=\"testEnumType\">");
        checkSchemaContent("<xs:enumeration value=\"ONE\"/>");
        checkSchemaContent("<xs:enumeration value=\"TWO\"/>");
        checkSchemaContent("<xs:enumeration value=\"THREE\"/>");
        schemaOutputFile.delete();
    }

    private static void checkIfSchemaGenerated() {
        if (!schemaOutputFile.exists()) {
            throw new RuntimeException("FAIL:" + SCHEMA_OUTPUT_FILENAME + " was not generated by schemagen tool");
        }
    }

    private static void checkSchemaContent(String exp_token) throws FileNotFoundException {
        System.out.print("Check if generated schema contains '" + exp_token + "' string: ");
        try (Scanner scanner = new Scanner(schemaOutputFile)) {
            if (scanner.findWithinHorizon(exp_token, 0) != null) {
                System.out.println("OK");
                return;
            }
        }
        System.out.println("FAIL");
        throw new RuntimeException("The '" + exp_token + "' is not found in generated schema");

    }

    private static String getClassFilePath(String filename) {
        String testSrc = System.getProperty("test.src");
        if (testSrc == null) {
            testSrc = ".";
        }
        return Paths.get(testSrc).resolve(filename).toString();
    }

    private static String getSchemagen() {
        String javaHome = System.getProperty("java.home");
        if (javaHome.endsWith("jre")) {
            javaHome = new File(javaHome).getParent();
        }
        String schemagen = javaHome + File.separator + "bin" + File.separator + "schemagen";
        if (System.getProperty("os.name").startsWith("Windows")) {
            schemagen = schemagen.concat(".exe");
        }
        return schemagen;
    }

    private static void logOutput(Process p) throws IOException {
        BufferedReader r = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String s = r.readLine();
        while (s != null) {
            System.out.println(s.trim());
            s = r.readLine();
        }
    }

    private static void runSchemaGen(String classFile) {
        String schemagen = getSchemagen();

        try {
            System.out.println("Call to schemagen: " + schemagen + " " + classFile);
            String[] schemagen_args = {
                schemagen,
                getClassFilePath(classFile)
            };

            ProcessBuilder pb = new ProcessBuilder(schemagen_args);
            pb.redirectErrorStream(true);
            Process p = pb.start();
            logOutput(p);
            int result = p.waitFor();
            p.destroy();

            if (result != 0) {
                throw new RuntimeException("schemagen failed");
            }
        } catch (IOException | InterruptedException e) {
            System.err.println("Can't run schemagen tool. Exception:");
            e.printStackTrace(System.err);
            throw new RuntimeException("Error launching schemagen tool");
        }
    }
}