package org.jboss.resteasy.test.core.encoding;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URI;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.StandardCharsets;

import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.core.Response;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.container.test.api.RunAsClient;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.resteasy.client.jaxrs.ResteasyClient;
import org.jboss.resteasy.test.core.encoding.resource.EncodingTestClient;
import org.jboss.resteasy.test.core.encoding.resource.EncodingTestResource;
import org.jboss.resteasy.util.Encode;
import org.jboss.resteasy.utils.PortProviderUtil;
import org.jboss.resteasy.utils.TestUtil;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;

/**
 * @tpSubChapter Encoding
 * @tpChapter Integration tests
 * @tpTestCaseDetails Test for HTML encoding and decoding.
 * @tpSince RESTEasy 3.0.16
 */
@RunWith(Arquillian.class)
@RunAsClient
public class EncodingTest {
    static ResteasyClient client;

    protected static final Logger logger = LogManager.getLogger(EncodingTest.class.getName());

    private static EncodingTestClient testClient;

    Character[] RESERVED_CHARACTERS = {
            '?', ':', '@', '&', '=', '+', '$', ','
    };

    //also includes a-zA-Z0-9
    Character[] UNRESERVED_CHARACTERS = {
            '-', '_', '.', '!', '~', '*', '\'', '(', ')'
    };
    //also includes 0x00-0x1F and 0x7F
    Character[] EXCLUDED_CHARACTERS = {
            ' ', '<', '>', '#', '%', '\"'
    };
    Character[] UNWISE_CHARACTERS = {
            '{', '}', '|', '\\', '^', '[', ']', '`'
    };

    @Before
    public void init() {
        client = (ResteasyClient) ClientBuilder.newClient();
        testClient = client.target(PortProviderUtil.generateBaseUrl(EncodingTest.class.getSimpleName()))
                .proxyBuilder(EncodingTestClient.class).build();
    }

    @After
    public void after() throws Exception {
        client.close();
    }

    @Deployment
    public static Archive<?> createTestArchive() {
        WebArchive war = TestUtil.prepareArchive(EncodingTest.class.getSimpleName());
        war.addClasses(EncodingTestClient.class);

        return TestUtil.finishContainerPrepare(war, null, EncodingTestResource.class);
    }

    /**
     * @tpTestDetails Tests requesting special characters via a ClientProxy.
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testEncodingCharacters() throws Exception {
        for (Character ch : RESERVED_CHARACTERS) {
            encodingCharacter(ch);
        }
        for (Character ch : UNRESERVED_CHARACTERS) {
            encodingCharacter(ch);
        }
        for (Character ch : EXCLUDED_CHARACTERS) {
            encodingCharacter(ch);
        }
        for (Character ch : UNWISE_CHARACTERS) {
            encodingCharacter(ch);
        }
    }

    public void encodingCharacter(Character toTest) {
        String paramWithChar = "start" + toTest + "end";
        Response returned = testClient.getPathParam(paramWithChar);
        Assert.assertNotNull("Wrong returned value", returned);
        Assert.assertEquals("Wrong returned status", returned.getStatus(), HttpURLConnection.HTTP_OK);
        Assert.assertEquals("Wrong returned value", returned.readEntity(String.class), paramWithChar);
    }

    /**
     * @tpTestDetails Tests backslash encoding.
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testPercent() {
        encodingCharacter('\\');
    }

    /**
     * @tpTestDetails Tests requesting special characters via manual URL construction.
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testViaDirectURI() throws Exception {
        for (Character ch : RESERVED_CHARACTERS) {
            viaDirectURI(ch);
        }
        for (Character ch : UNRESERVED_CHARACTERS) {
            viaDirectURI(ch);
        }
        for (Character ch : EXCLUDED_CHARACTERS) {
            viaDirectURI(ch);
        }
        for (Character ch : UNWISE_CHARACTERS) {
            viaDirectURI(ch);
        }

    }

    /**
     * @tpTestDetails Chinese character decoding in path.
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void decodeChineseInPath() throws Exception {
        String path = Encode.decodePath("/%E5%B9%B4%E5%81%87%E6%9C%9F/%E5%B9%B4%E5%81%87%E6%9C%9F");
        logger.info(path);
        Assert.assertEquals("Wrong decoded path", "/\u5E74\u5047\u671F/\u5E74\u5047\u671F", path);
    }

    /**
     * @tpTestDetails Western European character decoding in path.
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void decodeWesternEuropeanCharsInPath() throws Exception {
        Assert.assertEquals("Wrong decoded path", "Gr\u00FC\u00DF Gott", Encode.decodePath("Gr%C3%BC%C3%9F%20Gott"));
        Assert.assertEquals("Wrong decoded path", "D\u00E6lenenga Gr\u00FCnerl\u00F8kka",
                Encode.decodePath("D%C3%A6lenenga%20Gr%C3%BCnerl%C3%B8kka"));
        Assert.assertEquals("Wrong decoded path", "\u00C4lv\u00E5s V\u00E4stra G\u00F6taland",
                Encode.decodePath("%C3%84lv%C3%A5s%20V%C3%A4stra%20G%C3%B6taland"));
    }

    public void viaDirectURI(Character toTest) throws Exception {
        String expected = "start" + toTest + "end";
        String encoded = "start%" + Integer.toHexString(toTest).toUpperCase() + "end";
        String stringUri = PortProviderUtil.generateURL("/test/path-param/" + encoded, EncodingTest.class.getSimpleName());
        URI uri = URI.create(stringUri);
        HttpURLConnection connection = (HttpURLConnection) uri.toURL().openConnection();
        connection.setRequestMethod("GET");
        connection.setRequestProperty("accept", "text/plain");
        InputStream is = connection.getInputStream();
        Reader r = new InputStreamReader(is, StandardCharsets.UTF_8);
        StringBuffer buf = new StringBuffer();
        char[] chars = new char[1024];
        int charsRead;
        while ((charsRead = r.read(chars)) != -1) {
            buf.append(chars, 0, charsRead);
        }
        r.close();
        is.close();

        Assert.assertEquals("Wrong answer (answer may be decoded badly)", buf.toString(), expected);
    }

    /**
     * @tpTestDetails Test method for {@link org.jboss.resteasy.util.Encode#encodeQueryParam(String)}
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testEncodeQueryParam() {
        Assert.assertEquals("Wrong encoded path", "Test", Encode.encodeQueryParam("Test"));
    }

    /**
     * @tpTestDetails Test method for {@link org.jboss.resteasy.util.Encode#encodeQueryParam(String)}.
     *                Special characters are used.
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testEncodeQueryParam_special() {
        Assert.assertEquals("Wrong encoded path", ".-%2B%2F%7C", Encode.encodeQueryParam(".-+/|"));
    }

    /**
     * @tpTestDetails Test for scands characters.
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testEncodeQueryParamScands() throws UnsupportedEncodingException {
        String input = "\u00E5\u00E4\u00F6\u00C5\u00C4\u00D6";
        String expected = "%C3%A5%C3%A4%C3%B6%C3%85%C3%84%C3%96";
        Assert.assertEquals("Wrong encoded path", expected, Encode.encodeQueryParam(input));
    }

    /**
     * @tpTestDetails Test for 2bytes UTF8 character.
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testEncodeQueryParamUtf8TwoByte() throws CharacterCodingException, UnsupportedEncodingException {
        StringBuilder sb = new StringBuilder();
        for (int n = 0; n < 2047; n++) {
            sb.append((char) n);
        }
        String characters = sb.toString();
        String encodedQueryParam = Encode.encodeQueryParam(characters);
        String expected = "%00%01%02%03%04%05%06%07%08%09%0A%0B%0C%0D%0E%0F%10%11%12%13%14%15%16%17%18%19%1A%1B%1C%1D%1E%1F+%21%22%23%24%25%26%27%28%29*%2B%2C-.%2F0123456789%3A%3B%3C%3D%3E?%40ABCDEFGHIJKLMNOPQRSTUVWXYZ%5B%5C%5D%5E_%60abcdefghijklmnopqrstuvwxyz{|}~%7F%C2%80%C2%81%C2%82%C2%83%C2%84%C2%85%C2%86%C2%87%C2%88%C2%89%C2%8A%C2%8B%C2%8C%C2%8D%C2%8E%C2%8F%C2%90%C2%91%C2%92%C2%93%C2%94%C2%95%C2%96%C2%97%C2%98%C2%99%C2%9A%C2%9B%C2%9C%C2%9D%C2%9E%C2%9F%C2%A0%C2%A1%C2%A2%C2%A3%C2%A4%C2%A5%C2%A6%C2%A7%C2%A8%C2%A9%C2%AA%C2%AB%C2%AC%C2%AD%C2%AE%C2%AF%C2%B0%C2%B1%C2%B2%C2%B3%C2%B4%C2%B5%C2%B6%C2%B7%C2%B8%C2%B9%C2%BA%C2%BB%C2%BC%C2%BD%C2%BE%C2%BF%C3%80%C3%81%C3%82%C3%83%C3%84%C3%85%C3%86%C3%87%C3%88%C3%89%C3%8A%C3%8B%C3%8C%C3%8D%C3%8E%C3%8F%C3%90%C3%91%C3%92%C3%93%C3%94%C3%95%C3%96%C3%97%C3%98%C3%99%C3%9A%C3%9B%C3%9C%C3%9D%C3%9E%C3%9F%C3%A0%C3%A1%C3%A2%C3%A3%C3%A4%C3%A5%C3%A6%C3%A7%C3%A8%C3%A9%C3%AA%C3%AB%C3%AC%C3%AD%C3%AE%C3%AF%C3%B0%C3%B1%C3%B2%C3%B3%C3%B4%C3%B5%C3%B6%C3%B7%C3%B8%C3%B9%C3%BA%C3%BB%C3%BC%C3%BD%C3%BE%C3%BF%C4%80%C4%81%C4%82%C4%83%C4%84%C4%85%C4%86%C4%87%C4%88%C4%89%C4%8A%C4%8B%C4%8C%C4%8D%C4%8E%C4%8F%C4%90%C4%91%C4%92%C4%93%C4%94%C4%95%C4%96%C4%97%C4%98%C4%99%C4%9A%C4%9B%C4%9C%C4%9D%C4%9E%C4%9F%C4%A0%C4%A1%C4%A2%C4%A3%C4%A4%C4%A5%C4%A6%C4%A7%C4%A8%C4%A9%C4%AA%C4%AB%C4%AC%C4%AD%C4%AE%C4%AF%C4%B0%C4%B1%C4%B2%C4%B3%C4%B4%C4%B5%C4%B6%C4%B7%C4%B8%C4%B9%C4%BA%C4%BB%C4%BC%C4%BD%C4%BE%C4%BF%C5%80%C5%81%C5%82%C5%83%C5%84%C5%85%C5%86%C5%87%C5%88%C5%89%C5%8A%C5%8B%C5%8C%C5%8D%C5%8E%C5%8F%C5%90%C5%91%C5%92%C5%93%C5%94%C5%95%C5%96%C5%97%C5%98%C5%99%C5%9A%C5%9B%C5%9C%C5%9D%C5%9E%C5%9F%C5%A0%C5%A1%C5%A2%C5%A3%C5%A4%C5%A5%C5%A6%C5%A7%C5%A8%C5%A9%C5%AA%C5%AB%C5%AC%C5%AD%C5%AE%C5%AF%C5%B0%C5%B1%C5%B2%C5%B3%C5%B4%C5%B5%C5%B6%C5%B7%C5%B8%C5%B9%C5%BA%C5%BB%C5%BC%C5%BD%C5%BE%C5%BF%C6%80%C6%81%C6%82%C6%83%C6%84%C6%85%C6%86%C6%87%C6%88%C6%89%C6%8A%C6%8B%C6%8C%C6%8D%C6%8E%C6%8F%C6%90%C6%91%C6%92%C6%93%C6%94%C6%95%C6%96%C6%97%C6%98%C6%99%C6%9A%C6%9B%C6%9C%C6%9D%C6%9E%C6%9F%C6%A0%C6%A1%C6%A2%C6%A3%C6%A4%C6%A5%C6%A6%C6%A7%C6%A8%C6%A9%C6%AA%C6%AB%C6%AC%C6%AD%C6%AE%C6%AF%C6%B0%C6%B1%C6%B2%C6%B3%C6%B4%C6%B5%C6%B6%C6%B7%C6%B8%C6%B9%C6%BA%C6%BB%C6%BC%C6%BD%C6%BE%C6%BF%C7%80%C7%81%C7%82%C7%83%C7%84%C7%85%C7%86%C7%87%C7%88%C7%89%C7%8A%C7%8B%C7%8C%C7%8D%C7%8E%C7%8F%C7%90%C7%91%C7%92%C7%93%C7%94%C7%95%C7%96%C7%97%C7%98%C7%99%C7%9A%C7%9B%C7%9C%C7%9D%C7%9E%C7%9F%C7%A0%C7%A1%C7%A2%C7%A3%C7%A4%C7%A5%C7%A6%C7%A7%C7%A8%C7%A9%C7%AA%C7%AB%C7%AC%C7%AD%C7%AE%C7%AF%C7%B0%C7%B1%C7%B2%C7%B3%C7%B4%C7%B5%C7%B6%C7%B7%C7%B8%C7%B9%C7%BA%C7%BB%C7%BC%C7%BD%C7%BE%C7%BF%C8%80%C8%81%C8%82%C8%83%C8%84%C8%85%C8%86%C8%87%C8%88%C8%89%C8%8A%C8%8B%C8%8C%C8%8D%C8%8E%C8%8F%C8%90%C8%91%C8%92%C8%93%C8%94%C8%95%C8%96%C8%97%C8%98%C8%99%C8%9A%C8%9B%C8%9C%C8%9D%C8%9E%C8%9F%C8%A0%C8%A1%C8%A2%C8%A3%C8%A4%C8%A5%C8%A6%C8%A7%C8%A8%C8%A9%C8%AA%C8%AB%C8%AC%C8%AD%C8%AE%C8%AF%C8%B0%C8%B1%C8%B2%C8%B3%C8%B4%C8%B5%C8%B6%C8%B7%C8%B8%C8%B9%C8%BA%C8%BB%C8%BC%C8%BD%C8%BE%C8%BF%C9%80%C9%81%C9%82%C9%83%C9%84%C9%85%C9%86%C9%87%C9%88%C9%89%C9%8A%C9%8B%C9%8C%C9%8D%C9%8E%C9%8F%C9%90%C9%91%C9%92%C9%93%C9%94%C9%95%C9%96%C9%97%C9%98%C9%99%C9%9A%C9%9B%C9%9C%C9%9D%C9%9E%C9%9F%C9%A0%C9%A1%C9%A2%C9%A3%C9%A4%C9%A5%C9%A6%C9%A7%C9%A8%C9%A9%C9%AA%C9%AB%C9%AC%C9%AD%C9%AE%C9%AF%C9%B0%C9%B1%C9%B2%C9%B3%C9%B4%C9%B5%C9%B6%C9%B7%C9%B8%C9%B9%C9%BA%C9%BB%C9%BC%C9%BD%C9%BE%C9%BF%CA%80%CA%81%CA%82%CA%83%CA%84%CA%85%CA%86%CA%87%CA%88%CA%89%CA%8A%CA%8B%CA%8C%CA%8D%CA%8E%CA%8F%CA%90%CA%91%CA%92%CA%93%CA%94%CA%95%CA%96%CA%97%CA%98%CA%99%CA%9A%CA%9B%CA%9C%CA%9D%CA%9E%CA%9F%CA%A0%CA%A1%CA%A2%CA%A3%CA%A4%CA%A5%CA%A6%CA%A7%CA%A8%CA%A9%CA%AA%CA%AB%CA%AC%CA%AD%CA%AE%CA%AF%CA%B0%CA%B1%CA%B2%CA%B3%CA%B4%CA%B5%CA%B6%CA%B7%CA%B8%CA%B9%CA%BA%CA%BB%CA%BC%CA%BD%CA%BE%CA%BF%CB%80%CB%81%CB%82%CB%83%CB%84%CB%85%CB%86%CB%87%CB%88%CB%89%CB%8A%CB%8B%CB%8C%CB%8D%CB%8E%CB%8F%CB%90%CB%91%CB%92%CB%93%CB%94%CB%95%CB%96%CB%97%CB%98%CB%99%CB%9A%CB%9B%CB%9C%CB%9D%CB%9E%CB%9F%CB%A0%CB%A1%CB%A2%CB%A3%CB%A4%CB%A5%CB%A6%CB%A7%CB%A8%CB%A9%CB%AA%CB%AB%CB%AC%CB%AD%CB%AE%CB%AF%CB%B0%CB%B1%CB%B2%CB%B3%CB%B4%CB%B5%CB%B6%CB%B7%CB%B8%CB%B9%CB%BA%CB%BB%CB%BC%CB%BD%CB%BE%CB%BF%CC%80%CC%81%CC%82%CC%83%CC%84%CC%85%CC%86%CC%87%CC%88%CC%89%CC%8A%CC%8B%CC%8C%CC%8D%CC%8E%CC%8F%CC%90%CC%91%CC%92%CC%93%CC%94%CC%95%CC%96%CC%97%CC%98%CC%99%CC%9A%CC%9B%CC%9C%CC%9D%CC%9E%CC%9F%CC%A0%CC%A1%CC%A2%CC%A3%CC%A4%CC%A5%CC%A6%CC%A7%CC%A8%CC%A9%CC%AA%CC%AB%CC%AC%CC%AD%CC%AE%CC%AF%CC%B0%CC%B1%CC%B2%CC%B3%CC%B4%CC%B5%CC%B6%CC%B7%CC%B8%CC%B9%CC%BA%CC%BB%CC%BC%CC%BD%CC%BE%CC%BF%CD%80%CD%81%CD%82%CD%83%CD%84%CD%85%CD%86%CD%87%CD%88%CD%89%CD%8A%CD%8B%CD%8C%CD%8D%CD%8E%CD%8F%CD%90%CD%91%CD%92%CD%93%CD%94%CD%95%CD%96%CD%97%CD%98%CD%99%CD%9A%CD%9B%CD%9C%CD%9D%CD%9E%CD%9F%CD%A0%CD%A1%CD%A2%CD%A3%CD%A4%CD%A5%CD%A6%CD%A7%CD%A8%CD%A9%CD%AA%CD%AB%CD%AC%CD%AD%CD%AE%CD%AF%CD%B0%CD%B1%CD%B2%CD%B3%CD%B4%CD%B5%CD%B6%CD%B7%CD%B8%CD%B9%CD%BA%CD%BB%CD%BC%CD%BD%CD%BE%CD%BF%CE%80%CE%81%CE%82%CE%83%CE%84%CE%85%CE%86%CE%87%CE%88%CE%89%CE%8A%CE%8B%CE%8C%CE%8D%CE%8E%CE%8F%CE%90%CE%91%CE%92%CE%93%CE%94%CE%95%CE%96%CE%97%CE%98%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        Assert.assertEquals("Wrong encoded path", expected, encodedQueryParam);
    }

    public void testPathParamWithDoublePercent() {
        String paramWithDoublePercent = "start%%end";
        Response returned = testClient.getPathParam(paramWithDoublePercent);
        Assert.assertNotNull(returned);
        Assert.assertEquals(HttpURLConnection.HTTP_OK, returned.getStatus());
        Assert.assertEquals(paramWithDoublePercent, returned.readEntity(String.class));
    }

    /**
     * @tpTestDetails Test path for {} characters
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testPathParamWithBraces() {
        String paramWithBraces = "start{param}end";
        Response returned = testClient.getPathParam(paramWithBraces);
        Assert.assertNotNull("Wrong content of response", returned);
        Assert.assertEquals(HttpURLConnection.HTTP_OK, returned.getStatus());
        Assert.assertEquals("Wrong content of response", paramWithBraces, returned.readEntity(String.class));
    }

    /**
     * @tpTestDetails Test path for % character
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testPathParamWithLifePercentDeath() {
        String paramWithLifePercentDeath = "life%death";
        Response returned = testClient.getPathParam(paramWithLifePercentDeath);
        Assert.assertNotNull("Wrong content of response", returned);
        Assert.assertEquals(HttpURLConnection.HTTP_OK, returned.getStatus());
        Assert.assertEquals("Wrong content of response", paramWithLifePercentDeath, returned.readEntity(String.class));
    }

    /**
     * @tpTestDetails Test query for %% characters
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testQueryParamWithDoublePercent() {
        String paramWithDoublePercent = "start%%end";
        Response returned = testClient.getQueryParam(paramWithDoublePercent);
        Assert.assertNotNull("Wrong content of response", returned);
        Assert.assertEquals(HttpURLConnection.HTTP_OK, returned.getStatus());
        Assert.assertEquals("Wrong content of response", paramWithDoublePercent, returned.readEntity(String.class));
    }

    /**
     * @tpTestDetails Test query for {} characters
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testQueryParamWithBraces() {
        String paramWithBraces = "start{param}end";
        Response returned = testClient.getQueryParam(paramWithBraces);
        Assert.assertNotNull("Wrong content of response", returned);
        Assert.assertEquals(HttpURLConnection.HTTP_OK, returned.getStatus());
        Assert.assertEquals("Wrong content of response", paramWithBraces, returned.readEntity(String.class));
    }

    /**
     * @tpTestDetails Test query for % character
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testQueryParamWithLifePercentDeath() {
        String paramWithLifePercentDeath = "life%death";
        Response returned = testClient.getQueryParam(paramWithLifePercentDeath);
        Assert.assertNotNull("Wrong content of response", returned);
        Assert.assertEquals(HttpURLConnection.HTTP_OK, returned.getStatus());
        Assert.assertEquals("Wrong content of response", paramWithLifePercentDeath, returned.readEntity(String.class));
    }

    /**
     * @tpTestDetails Test for encoding string seems to be a code, but it is not a code
     * @tpSince RESTEasy 3.0.16
     */
    @Test
    public void testEncodeNonCodes() {
        final String ERROR_MSG = "Text was not encoded successfully";
        Assert.assertEquals(ERROR_MSG, "", Encode.encodeNonCodes(""));
        Assert.assertEquals(ERROR_MSG, "a simple string", Encode.encodeNonCodes("a simple string"));
        Assert.assertEquals(ERROR_MSG, "%25", Encode.encodeNonCodes("%"));
        Assert.assertEquals(ERROR_MSG, "%25%25%25%25", Encode.encodeNonCodes("%%%%"));
        Assert.assertEquals(ERROR_MSG, "%25%25", Encode.encodeNonCodes("%%25"));
        Assert.assertEquals(ERROR_MSG, "%25a%25", Encode.encodeNonCodes("%a%25"));
        Assert.assertEquals(ERROR_MSG, "a%25b", Encode.encodeNonCodes("a%b"));
        Assert.assertEquals(ERROR_MSG, "a%25b", Encode.encodeNonCodes("a%25b"));
        Assert.assertEquals(ERROR_MSG, "a%25%25%25%25b%25%25%25%25c", Encode.encodeNonCodes("a%%%%b%%25%%c"));
    }

}
