/**

 * Back 2 Browser Bytecode Translator

 * Copyright (C) 2012-2015 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 2 of the License.

 *

 * This program 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 for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. Look for COPYING file in the top folder.

 * If not, see http://opensource.org/licenses/GPL-2.0.

 */

package org.apidesign.bck2brwsr.vmtest.impl;

import java.io.IOException;

import java.io.InputStream;

import java.util.zip.ZipEntry;

import java.util.zip.ZipInputStream;

import org.apidesign.bck2brwsr.core.JavaScriptBody;

import org.apidesign.bck2brwsr.vmtest.BrwsrTest;

import org.apidesign.bck2brwsr.vmtest.Compare;

import org.apidesign.bck2brwsr.vmtest.Http;

import org.apidesign.bck2brwsr.vmtest.VMTest;

import org.testng.annotations.Factory;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

@GenerateZip(name = "readAnEntry.zip", contents = { 

    "my/main/file.txt", "Hello World!"

})

public class ZipFileTest {

    @Compare public String readAnEntry() throws IOException {

        InputStream is = ZipFileTest.class.getResourceAsStream("readAnEntry.zip");

        ZipInputStream zip = new ZipInputStream(is);

        ZipEntry entry = zip.getNextEntry();

        assertEquals(entry.getName(), "my/main/file.txt", "Correct entry");

        byte[] arr = new byte[4096];

        int len = zip.read(arr);

        assertEquals(zip.getNextEntry(), null, "No next entry");

        final String ret = new String(arr, 0, len, "UTF-8");

        return ret;

    }

    @JavaScriptBody(args = { "res", "path" }, body = 

          "var myvm = bck2brwsr.apply(null, path);\n"

        + "var cls = myvm['loadClass']('java.lang.String');\n"

        + "return cls['getClass__Ljava_lang_Class_2']()['getResourceAsStream__Ljava_io_InputStream_2Ljava_lang_String_2'](res);\n"

    )

    private static native Object loadVMResource(String res, String...path);

    @Http({

        @Http.Resource(path = "/readAnEntry.jar", mimeType = "x-application/zip", content = "", resource="readAnEntry.zip")

    })

    @BrwsrTest  public void canVmLoadResourceFromZip() throws IOException {

        Object res = loadVMResource("/my/main/file.txt", "/readAnEntry.jar");

        assert res instanceof InputStream : "Got array of bytes: " + res;

        InputStream is = (InputStream)res;

        byte[] arr = new byte[4096];

        int len = is.read(arr);

        final String ret = new String(arr, 0, len, "UTF-8");

        assertEquals(ret, "Hello World!", "Can read the bytes");

    }

    @GenerateZip(name = "cpattr.zip", contents = { 

        "META-INF/MANIFEST.MF", "Manifest-Version: 1.0\n"

        + "Created-By: hand\n"

        + "Class-Path: realJar.jar\n\n\n"

    })

    @Http({

        @Http.Resource(path = "/readComplexEntry.jar", mimeType = "x-application/zip", content = "", resource="cpattr.zip"),

        @Http.Resource(path = "/realJar.jar", mimeType = "x-application/zip", content = "", resource="readAnEntry.zip"),

    })

    @BrwsrTest  public void understandsClassPathAttr() throws IOException {

        Object res = loadVMResource("/my/main/file.txt", "/readComplexEntry.jar");

        assert res instanceof InputStream : "Got array of bytes: " + res;

        InputStream is = (InputStream)res;

        byte[] arr = new byte[4096];

        int len = is.read(arr);

        final String ret = new String(arr, 0, len, "UTF-8");

        assertEquals(ret, "Hello World!", "Can read the bytes from secondary JAR");

    }

    private static void assertEquals(Object real, Object exp, String msg) {

        if (real == null) {

            if (exp == null) {

                return;

            }

        } else {

            if (real.equals(exp)) {

                return;

            }

        }

        assert false : msg + " exp: " + exp + " real: " + real;

    }

    @Factory public static Object[] create() {

        return VMTest.create(ZipFileTest.class);

    }

}