/*
 * Copyright 2012-2019 the original author or authors.
 *
 * Licensed 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
 *
 *      https://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.springframework.boot.loader.jar;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.api.io.TempDir;

import org.springframework.boot.loader.TestJarCreator;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * Tests for {@link Handler}.
 *
 * @author Andy Wilkinson
 */
@ExtendWith(JarUrlProtocolHandler.class)
class HandlerTests {

	private final Handler handler = new Handler();

	@Test
	void parseUrlWithJarRootContextAndAbsoluteSpecThatUsesContext() throws MalformedURLException {
		String spec = "/entry.txt";
		URL context = createUrl("file:example.jar!/");
		this.handler.parseURL(context, spec, 0, spec.length());
		assertThat(context.toExternalForm()).isEqualTo("jar:file:example.jar!/entry.txt");
	}

	@Test
	void parseUrlWithDirectoryEntryContextAndAbsoluteSpecThatUsesContext() throws MalformedURLException {
		String spec = "/entry.txt";
		URL context = createUrl("file:example.jar!/dir/");
		this.handler.parseURL(context, spec, 0, spec.length());
		assertThat(context.toExternalForm()).isEqualTo("jar:file:example.jar!/entry.txt");
	}

	@Test
	void parseUrlWithJarRootContextAndRelativeSpecThatUsesContext() throws MalformedURLException {
		String spec = "entry.txt";
		URL context = createUrl("file:example.jar!/");
		this.handler.parseURL(context, spec, 0, spec.length());
		assertThat(context.toExternalForm()).isEqualTo("jar:file:example.jar!/entry.txt");
	}

	@Test
	void parseUrlWithDirectoryEntryContextAndRelativeSpecThatUsesContext() throws MalformedURLException {
		String spec = "entry.txt";
		URL context = createUrl("file:example.jar!/dir/");
		this.handler.parseURL(context, spec, 0, spec.length());
		assertThat(context.toExternalForm()).isEqualTo("jar:file:example.jar!/dir/entry.txt");
	}

	@Test
	void parseUrlWithFileEntryContextAndRelativeSpecThatUsesContext() throws MalformedURLException {
		String spec = "entry.txt";
		URL context = createUrl("file:example.jar!/dir/file");
		this.handler.parseURL(context, spec, 0, spec.length());
		assertThat(context.toExternalForm()).isEqualTo("jar:file:example.jar!/dir/entry.txt");
	}

	@Test
	void parseUrlWithSpecThatIgnoresContext() throws MalformedURLException {
		JarFile.registerUrlProtocolHandler();
		String spec = "jar:file:/other.jar!/nested!/entry.txt";
		URL context = createUrl("file:example.jar!/dir/file");
		this.handler.parseURL(context, spec, 0, spec.length());
		assertThat(context.toExternalForm()).isEqualTo("jar:jar:file:/other.jar!/nested!/entry.txt");
	}

	@Test
	void sameFileReturnsFalseForUrlsWithDifferentProtocols() throws MalformedURLException {
		assertThat(this.handler.sameFile(new URL("jar:file:foo.jar!/content.txt"), new URL("file:/foo.jar"))).isFalse();
	}

	@Test
	void sameFileReturnsFalseForDifferentFileInSameJar() throws MalformedURLException {
		assertThat(this.handler.sameFile(new URL("jar:file:foo.jar!/the/path/to/the/first/content.txt"),
				new URL("jar:file:/foo.jar!/content.txt"))).isFalse();
	}

	@Test
	void sameFileReturnsFalseForSameFileInDifferentJars() throws MalformedURLException {
		assertThat(this.handler.sameFile(new URL("jar:file:/the/path/to/the/first.jar!/content.txt"),
				new URL("jar:file:/second.jar!/content.txt"))).isFalse();
	}

	@Test
	void sameFileReturnsTrueForSameFileInSameJar() throws MalformedURLException {
		assertThat(this.handler.sameFile(new URL("jar:file:/the/path/to/the/first.jar!/content.txt"),
				new URL("jar:file:/the/path/to/the/first.jar!/content.txt"))).isTrue();
	}

	@Test
	void sameFileReturnsTrueForUrlsThatReferenceSameFileViaNestedArchiveAndFromRootOfJar()
			throws MalformedURLException {
		assertThat(this.handler.sameFile(new URL("jar:file:/test.jar!/BOOT-INF/classes!/foo.txt"),
				new URL("jar:file:/test.jar!/BOOT-INF/classes/foo.txt"))).isTrue();
	}

	@Test
	void hashCodesAreEqualForUrlsThatReferenceSameFileViaNestedArchiveAndFromRootOfJar() throws MalformedURLException {
		assertThat(this.handler.hashCode(new URL("jar:file:/test.jar!/BOOT-INF/classes!/foo.txt")))
				.isEqualTo(this.handler.hashCode(new URL("jar:file:/test.jar!/BOOT-INF/classes/foo.txt")));
	}

	@Test
	void urlWithSpecReferencingParentDirectory() throws MalformedURLException {
		assertStandardAndCustomHandlerUrlsAreEqual("file:/test.jar!/BOOT-INF/classes!/xsd/folderA/a.xsd",
				"../folderB/c/d/e.xsd");
	}

	@Test
	void urlWithSpecReferencingAncestorDirectoryOutsideJarStopsAtJarRoot() throws MalformedURLException {
		assertStandardAndCustomHandlerUrlsAreEqual("file:/test.jar!/BOOT-INF/classes!/xsd/folderA/a.xsd",
				"../../../../../../folderB/b.xsd");
	}

	@Test
	void urlWithSpecReferencingCurrentDirectory() throws MalformedURLException {
		assertStandardAndCustomHandlerUrlsAreEqual("file:/test.jar!/BOOT-INF/classes!/xsd/folderA/a.xsd",
				"./folderB/c/d/e.xsd");
	}

	@Test
	void urlWithRef() throws MalformedURLException {
		assertStandardAndCustomHandlerUrlsAreEqual("file:/test.jar!/BOOT-INF/classes", "!/foo.txt#alpha");
	}

	@Test
	void urlWithQuery() throws MalformedURLException {
		assertStandardAndCustomHandlerUrlsAreEqual("file:/test.jar!/BOOT-INF/classes", "!/foo.txt?alpha");
	}

	@Test
	void fallbackToJdksJarUrlStreamHandler(@TempDir File tempDir) throws Exception {
		File testJar = new File(tempDir, "test.jar");
		TestJarCreator.createTestJar(testJar);
		URLConnection connection = new URL(null, "jar:" + testJar.toURI().toURL() + "!/nested.jar!/", this.handler)
				.openConnection();
		assertThat(connection).isInstanceOf(JarURLConnection.class);
		((JarURLConnection) connection).getJarFile().close();
		URLConnection jdkConnection = new URL(null, "jar:file:" + testJar.toURI().toURL() + "!/nested.jar!/",
				this.handler).openConnection();
		assertThat(jdkConnection).isNotInstanceOf(JarURLConnection.class);
	}

	@Test
	void whenJarHasAPlusInItsPathConnectionJarFileMatchesOriginalJarFile(@TempDir File tempDir) throws Exception {
		File testJar = new File(tempDir, "t+e+s+t.jar");
		TestJarCreator.createTestJar(testJar);
		URL url = new URL(null, "jar:" + testJar.toURI().toURL() + "!/nested.jar!/3.dat", this.handler);
		JarURLConnection connection = (JarURLConnection) url.openConnection();
		try {
			assertThat(connection.getJarFile().getRootJarFile().getFile()).isEqualTo(testJar);
		}
		finally {
			connection.getJarFile().close();
		}
	}

	@Test
	void whenJarHasASpaceInItsPathConnectionJarFileMatchesOriginalJarFile(@TempDir File tempDir) throws Exception {
		File testJar = new File(tempDir, "t e s t.jar");
		TestJarCreator.createTestJar(testJar);
		URL url = new URL(null, "jar:" + testJar.toURI().toURL() + "!/nested.jar!/3.dat", this.handler);
		JarURLConnection connection = (JarURLConnection) url.openConnection();
		try {
			assertThat(connection.getJarFile().getRootJarFile().getFile()).isEqualTo(testJar);
		}
		finally {
			connection.getJarFile().close();
		}
	}

	private void assertStandardAndCustomHandlerUrlsAreEqual(String context, String spec) throws MalformedURLException {
		URL standardUrl = new URL(new URL("jar:" + context), spec);
		URL customHandlerUrl = new URL(new URL("jar", null, -1, context, this.handler), spec);
		assertThat(customHandlerUrl.toString()).isEqualTo(standardUrl.toString());
		assertThat(customHandlerUrl.getFile()).isEqualTo(standardUrl.getFile());
		assertThat(customHandlerUrl.getPath()).isEqualTo(standardUrl.getPath());
		assertThat(customHandlerUrl.getQuery()).isEqualTo(standardUrl.getQuery());
		assertThat(customHandlerUrl.getRef()).isEqualTo(standardUrl.getRef());
	}

	private URL createUrl(String file) throws MalformedURLException {
		return new URL("jar", null, -1, file, this.handler);
	}

}
