/*
 * Copyright 2002-2018 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.security.oauth2.client.userinfo;

import java.time.Instant;
import java.util.Arrays;
import java.util.LinkedHashSet;

import org.junit.jupiter.api.Test;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.RequestEntity;
import org.springframework.security.oauth2.client.registration.ClientRegistration;
import org.springframework.security.oauth2.client.registration.TestClientRegistrations;
import org.springframework.security.oauth2.core.AuthenticationMethod;
import org.springframework.security.oauth2.core.OAuth2AccessToken;
import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
import org.springframework.util.MultiValueMap;

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

/**
 * Tests for {@link OAuth2UserRequestEntityConverter}.
 *
 * @author Joe Grandja
 */
public class OAuth2UserRequestEntityConverterTests {

	private OAuth2UserRequestEntityConverter converter = new OAuth2UserRequestEntityConverter();

	@SuppressWarnings("unchecked")
	@Test
	public void convertWhenAuthenticationMethodHeaderThenGetRequest() {
		ClientRegistration clientRegistration = TestClientRegistrations.clientRegistration().build();
		OAuth2UserRequest userRequest = new OAuth2UserRequest(clientRegistration, this.createAccessToken());
		RequestEntity<?> requestEntity = this.converter.convert(userRequest);
		assertThat(requestEntity.getMethod()).isEqualTo(HttpMethod.GET);
		assertThat(requestEntity.getUrl().toASCIIString())
				.isEqualTo(clientRegistration.getProviderDetails().getUserInfoEndpoint().getUri());
		HttpHeaders headers = requestEntity.getHeaders();
		assertThat(headers.getAccept()).contains(MediaType.APPLICATION_JSON);
		assertThat(headers.getFirst(HttpHeaders.AUTHORIZATION))
				.isEqualTo("Bearer " + userRequest.getAccessToken().getTokenValue());
	}

	@SuppressWarnings("unchecked")
	@Test
	public void convertWhenAuthenticationMethodFormThenPostRequest() {
		ClientRegistration clientRegistration = TestClientRegistrations.clientRegistration()
				.userInfoAuthenticationMethod(AuthenticationMethod.FORM).build();
		OAuth2UserRequest userRequest = new OAuth2UserRequest(clientRegistration, this.createAccessToken());
		RequestEntity<?> requestEntity = this.converter.convert(userRequest);
		assertThat(requestEntity.getMethod()).isEqualTo(HttpMethod.POST);
		assertThat(requestEntity.getUrl().toASCIIString())
				.isEqualTo(clientRegistration.getProviderDetails().getUserInfoEndpoint().getUri());
		HttpHeaders headers = requestEntity.getHeaders();
		assertThat(headers.getAccept()).contains(MediaType.APPLICATION_JSON);
		assertThat(headers.getContentType())
				.isEqualTo(MediaType.valueOf(MediaType.APPLICATION_FORM_URLENCODED_VALUE + ";charset=UTF-8"));
		MultiValueMap<String, String> formParameters = (MultiValueMap<String, String>) requestEntity.getBody();
		assertThat(formParameters.getFirst(OAuth2ParameterNames.ACCESS_TOKEN))
				.isEqualTo(userRequest.getAccessToken().getTokenValue());
	}

	private OAuth2AccessToken createAccessToken() {
		OAuth2AccessToken accessToken = new OAuth2AccessToken(OAuth2AccessToken.TokenType.BEARER, "access-token-1234",
				Instant.now(), Instant.now().plusSeconds(3600), new LinkedHashSet<>(Arrays.asList("read", "write")));
		return accessToken;
	}

}
