/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 *
 *      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.
*/

package org.drools.compiler.kie.builder.impl;

import org.apache.commons.io.IOUtils;
import org.assertj.core.api.Assertions;
import org.drools.compiler.compiler.io.memory.MemoryFile;
import org.drools.compiler.compiler.io.memory.MemoryFileSystem;
import org.drools.compiler.compiler.io.memory.MemoryFolder;
import org.drools.core.common.ResourceProvider;
import org.junit.Test;
import org.kie.api.builder.ReleaseId;
import org.kie.api.builder.model.KieModuleModel;
import org.mockito.Mock;

public class MemoryKieModuleResourceProviderTest {

    @Mock
    ReleaseId releaseId;
    @Mock
    KieModuleModel kieModuleModel;

    @Test
    public void testGetResourceForEmptyFolder() throws Exception {
        MemoryFileSystem mfs = new MemoryFileSystem();
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java"));

        MemoryKieModule mkm = new MemoryKieModule(releaseId, kieModuleModel, mfs);
        ResourceProvider resourceProvider = mkm.createResourceProvider();

        String folderContents = IOUtils.toString(resourceProvider.getResource("src/main/java").openStream());
        Assertions.assertThat(folderContents).isEmpty();
    }

    @Test
    public void testGetResourceForFolderWithOnlySubFolders() throws Exception {
        MemoryFileSystem mfs = new MemoryFileSystem();
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java"));
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java/org"));
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java/com"));

        MemoryKieModule mkm = new MemoryKieModule(releaseId, kieModuleModel, mfs);
        ResourceProvider resourceProvider = mkm.createResourceProvider();

        String folderContents = IOUtils.toString(resourceProvider.getResource("src/main/java").openStream());
        Assertions.assertThat(folderContents).hasLineCount(2).contains("com", "org");
    }

    @Test
    public void testGetResourceForFolderWithFilesAndSubFolders() throws Exception {
        MemoryFileSystem mfs = new MemoryFileSystem();
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java"));
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java/org"));
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java/com"));
        mfs.setFileContents(new MemoryFile(mfs, "my-file1", mfs.getFolder("src/main/java")), new byte[10]);
        mfs.setFileContents(new MemoryFile(mfs, "my-file2", mfs.getFolder("src/main/java")), new byte[10]);

        MemoryKieModule mkm = new MemoryKieModule(releaseId, kieModuleModel, mfs);
        ResourceProvider resourceProvider = mkm.createResourceProvider();

        String folderContents = IOUtils.toString(resourceProvider.getResource("src/main/java").openStream());
        Assertions.assertThat(folderContents).hasLineCount(4).contains("com", "org", "my-file1", "my-file2");
    }

    @Test
    public void testGetResourceAsStreamForFile() throws Exception {
        MemoryFileSystem mfs = new MemoryFileSystem();
        mfs.setFileContents(new MemoryFile(mfs, "my-file1", mfs.getFolder("src/main/resources")), new byte[] {65, 66});

        MemoryKieModule mkm = new MemoryKieModule(releaseId, kieModuleModel, mfs);
        ResourceProvider resourceProvider = mkm.createResourceProvider();

        String folderContents = IOUtils.toString(resourceProvider.getResourceAsStream("src/main/resources/my-file1"));
        Assertions.assertThat(folderContents).hasLineCount(1).contains("AB"); // "AB" == new byte[] {65, 66}
    }

    @Test
    public void testGetResourceAsStreamFolderWithOnlySubFolders() throws Exception {
        MemoryFileSystem mfs = new MemoryFileSystem();
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java"));
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java/org"));
        mfs.createFolder(new MemoryFolder(mfs, "src/main/java/com"));

        MemoryKieModule mkm = new MemoryKieModule(releaseId, kieModuleModel, mfs);
        ResourceProvider resourceProvider = mkm.createResourceProvider();

        String folderContents = IOUtils.toString(resourceProvider.getResourceAsStream("src/main/java"));
        Assertions.assertThat(folderContents).hasLineCount(2).contains("com", "org");
    }

    @Test
    public void testGetResourceTrailingSlashIgnored() throws Exception {
        MemoryFileSystem mfs = new MemoryFileSystem();
        mfs.setFileContents(new MemoryFile(mfs, "my-file1", mfs.getFolder("src/main/resources")), new byte[] {65, 66});

        MemoryKieModule mkm = new MemoryKieModule(releaseId, kieModuleModel, mfs);
        ResourceProvider resourceProvider = mkm.createResourceProvider();

        String noTrailingSlashContents = IOUtils.toString(resourceProvider.getResourceAsStream("src/main/resources/my-file1"));
        Assertions.assertThat(noTrailingSlashContents).hasLineCount(1).contains("AB"); // "AB" == new byte[] {65, 66}

        String withTrailingSlashContents = IOUtils.toString(resourceProvider.getResourceAsStream("src/main/resources/my-file1/"));
        Assertions.assertThat(withTrailingSlashContents).hasLineCount(1).contains("AB"); // "AB" == new byte[] {65, 66}
    }

}