/*
 * Copyright 2010 Ning, Inc.
 *
 * This program is licensed 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.asynchttpclient;

import io.netty.handler.codec.http.HttpMethod;
import io.netty.handler.codec.http.cookie.Cookie;
import io.netty.handler.codec.http.cookie.DefaultCookie;
import org.testng.annotations.Test;

import java.util.*;

import static java.nio.charset.StandardCharsets.UTF_8;
import static java.util.Collections.singletonList;
import static org.asynchttpclient.Dsl.get;
import static org.testng.Assert.assertEquals;
import static org.testng.Assert.assertTrue;

public class RequestBuilderTest {

  private final static String SAFE_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890-_*.";
  private final static String HEX_CHARS = "0123456789ABCDEF";

  @Test
  public void testEncodesQueryParameters() {
    String[] values = new String[]{"abcdefghijklmnopqrstuvwxyz", "ABCDEFGHIJKQLMNOPQRSTUVWXYZ", "1234567890", "1234567890", "`~!@#$%^&*()", "`~!@#$%^&*()", "_+-=,.<>/?",
            "_+-=,.<>/?", ";:'\"[]{}\\| ", ";:'\"[]{}\\| "};

    /*
     * as per RFC-5849 (Oauth), and RFC-3986 (percent encoding) we MUST
     * encode everything except for "safe" characters; and nothing but them.
     * Safe includes ascii letters (upper and lower case), digits (0 - 9)
     * and FOUR special characters: hyphen ('-'), underscore ('_'), tilde
     * ('~') and period ('.')). Everything else must be percent-encoded,
     * byte-by-byte, using UTF-8 encoding (meaning three-byte Unicode/UTF-8
     * code points are encoded as three three-letter percent-encode
     * entities).
     */
    for (String value : values) {
      RequestBuilder builder = get("http://example.com/").addQueryParam("name", value);

      StringBuilder sb = new StringBuilder();
      for (int i = 0, len = value.length(); i < len; ++i) {
        char c = value.charAt(i);
        if (SAFE_CHARS.indexOf(c) >= 0) {
          sb.append(c);
        } else {
          int hi = (c >> 4);
          int lo = c & 0xF;
          sb.append('%').append(HEX_CHARS.charAt(hi)).append(HEX_CHARS.charAt(lo));
        }
      }
      String expValue = sb.toString();
      Request request = builder.build();
      assertEquals(request.getUrl(), "http://example.com/?name=" + expValue);
    }
  }

  @Test
  public void testChaining() {
    Request request = get("http://foo.com").addQueryParam("x", "value").build();

    Request request2 = request.toBuilder().build();

    assertEquals(request2.getUri(), request.getUri());
  }

  @Test
  public void testParsesQueryParams() {
    Request request = get("http://foo.com/?param1=value1").addQueryParam("param2", "value2").build();

    assertEquals(request.getUrl(), "http://foo.com/?param1=value1&param2=value2");
    List<Param> params = request.getQueryParams();
    assertEquals(params.size(), 2);
    assertEquals(params.get(0), new Param("param1", "value1"));
    assertEquals(params.get(1), new Param("param2", "value2"));
  }

  @Test
  public void testUserProvidedRequestMethod() {
    Request req = new RequestBuilder("ABC").setUrl("http://foo.com").build();
    assertEquals(req.getMethod(), "ABC");
    assertEquals(req.getUrl(), "http://foo.com");
  }

  @Test
  public void testPercentageEncodedUserInfo() {
    final Request req = get("http://hello:wor%20ld@foo.com").build();
    assertEquals(req.getMethod(), "GET");
    assertEquals(req.getUrl(), "http://hello:wor%20ld@foo.com");
  }

  @Test
  public void testContentTypeCharsetToBodyEncoding() {
    final Request req = get("http://localhost").setHeader("Content-Type", "application/json; charset=utf-8").build();
    assertEquals(req.getCharset(), UTF_8);
    final Request req2 = get("http://localhost").setHeader("Content-Type", "application/json; charset=\"utf-8\"").build();
    assertEquals(req2.getCharset(), UTF_8);
  }

  @Test
  public void testDefaultMethod() {
    RequestBuilder requestBuilder = new RequestBuilder();
    String defaultMethodName = HttpMethod.GET.name();
    assertEquals(requestBuilder.method, defaultMethodName, "Default HTTP method should be " + defaultMethodName);
  }

  @Test
  public void testSetHeaders() {
    RequestBuilder requestBuilder = new RequestBuilder();
    assertTrue(requestBuilder.headers.isEmpty(), "Headers should be empty by default.");

    Map<CharSequence, Collection<?>> headers = new HashMap<>();
    headers.put("Content-Type", Collections.singleton("application/json"));
    requestBuilder.setHeaders(headers);
    assertTrue(requestBuilder.headers.contains("Content-Type"), "headers set by setHeaders have not been set");
    assertEquals(requestBuilder.headers.get("Content-Type"), "application/json", "header value incorrect");
  }

  @Test
  public void testAddOrReplaceCookies() {
    RequestBuilder requestBuilder = new RequestBuilder();
    Cookie cookie = new DefaultCookie("name", "value");
    cookie.setDomain("google.com");
    cookie.setPath("/");
    cookie.setMaxAge(1000);
    cookie.setSecure(true);
    cookie.setHttpOnly(true);
    requestBuilder.addOrReplaceCookie(cookie);
    assertEquals(requestBuilder.cookies.size(), 1, "cookies size should be 1 after adding one cookie");
    assertEquals(requestBuilder.cookies.get(0), cookie, "cookie does not match");

    Cookie cookie2 = new DefaultCookie("name", "value");
    cookie2.setDomain("google2.com");
    cookie2.setPath("/path");
    cookie2.setMaxAge(1001);
    cookie2.setSecure(false);
    cookie2.setHttpOnly(false);

    requestBuilder.addOrReplaceCookie(cookie2);
    assertEquals(requestBuilder.cookies.size(), 1, "cookies size should remain 1 as we just replaced a cookie with same name");
    assertEquals(requestBuilder.cookies.get(0), cookie2, "cookie does not match");

    Cookie cookie3 = new DefaultCookie("name2", "value");
    cookie3.setDomain("google.com");
    cookie3.setPath("/");
    cookie3.setMaxAge(1000);
    cookie3.setSecure(true);
    cookie3.setHttpOnly(true);
    requestBuilder.addOrReplaceCookie(cookie3);
    assertEquals(requestBuilder.cookies.size(), 2, "cookie size must be 2 after adding 1 more cookie i.e. cookie3");
  }

  @Test
  public void testSettingQueryParamsBeforeUrlShouldNotProduceNPE() {
    RequestBuilder requestBuilder = new RequestBuilder();
    requestBuilder.setQueryParams(singletonList(new Param("key", "value")));
    requestBuilder.setUrl("http://localhost");
    Request request = requestBuilder.build();
    assertEquals(request.getUrl(), "http://localhost?key=value");
  }

  @Test
  public void testSettingHeadersUsingMapWithStringKeys() {
    Map<String, List<String>> headers = new HashMap<>();
    headers.put("X-Forwarded-For", singletonList("10.0.0.1"));

    RequestBuilder requestBuilder = new RequestBuilder();
    requestBuilder.setHeaders(headers);
    requestBuilder.setUrl("http://localhost");
    Request request =  requestBuilder.build();
    assertEquals(request.getHeaders().get("X-Forwarded-For"), "10.0.0.1");
  }
}