/*
 * 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.
 */
package org.apache.freemarker.generator.file;

import org.apache.freemarker.generator.base.file.RecursiveFileSupplier;
import org.junit.Test;

import java.io.File;
import java.util.Arrays;
import java.util.List;

import static java.util.Collections.singletonList;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class RecursiveFileResolverTest {

    private static final String ANY_DIRECTORY = "./src/test/data";
    private static final String ANY_FILE_NAME = "file_01.csv";
    private static final String UNKNOWN_FILE_NAME = "unknown.file";

    @Test
    public void shouldResolveAllFilesOfDirectory() {
        assertEquals(4, fileResolver(ANY_DIRECTORY, null, null).get().size());
        assertTrue(fileResolver(ANY_DIRECTORY, UNKNOWN_FILE_NAME, null).get().isEmpty());
    }

    @Test
    public void shouldResolveSingleMatchingFile() {
        final List<File> files = fileResolver(ANY_DIRECTORY, ANY_FILE_NAME, null).get();

        assertEquals(1, files.size());
        assertEquals(ANY_FILE_NAME, files.get(0).getName());
    }

    @Test
    public void shouldResolveMultipleFiles() {
        final List<String> sources = Arrays.asList("pom.xml", "README.md");
        final List<File> files = fileResolver(sources, "*", null).get();

        assertEquals(2, files.size());
        assertEquals("pom.xml", files.get(0).getName());
        assertEquals("README.md", files.get(1).getName());
    }

    @Test
    public void shouldResolveMultipleFilesWithIncludeFilter() {
        final List<String> sources = Arrays.asList("pom.xml", "README.md");
        final List<File> files = fileResolver(sources, "*.xml", null).get();

        assertEquals(1, files.size());
        assertEquals("pom.xml", files.get(0).getName());
    }

    @Test
    public void shouldExcludeAllFiles() {
        final List<File> files = fileResolver(ANY_DIRECTORY, null, "*").get();

        assertEquals(0, files.size());
    }

    @Test
    public void shouldExcludeFiles() {
        final List<File> files = fileResolver(ANY_DIRECTORY, null, "*.csv").get();

        assertEquals(2, files.size());
        assertEquals("file_01.txt", files.get(0).getName());
        assertEquals("test.properties", files.get(1).getName());
    }

    @Test
    public void shouldIncludeAndExcludeFiles() {
        final List<File> files = fileResolver(ANY_DIRECTORY, "file*.*", "*.csv").get();

        assertEquals(1, files.size());
        assertEquals("file_01.txt", files.get(0).getName());
    }

    @Test
    public void shouldResolveMultipleFilesRecursivelyWithIncludes() {
        final List<File> files = fileResolver(ANY_DIRECTORY, "*.csv", null).get();

        assertEquals(2, files.size());
    }

    private static RecursiveFileSupplier fileResolver(String source, String include, String exclude) {
        return fileResolver(singletonList(source), include, exclude);
    }

    private static RecursiveFileSupplier fileResolver(List<String> sources, String include, String exclude) {
        return new RecursiveFileSupplier(sources, singletonList(include), singletonList(exclude));
    }

}