/*
 * 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.core;

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

import org.junit.jupiter.api.Test;

import org.springframework.util.SerializationUtils;

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

/**
 * Tests for {@link OAuth2AccessToken}.
 *
 * @author Joe Grandja
 */
public class OAuth2AccessTokenTests {

	private static final OAuth2AccessToken.TokenType TOKEN_TYPE = OAuth2AccessToken.TokenType.BEARER;

	private static final String TOKEN_VALUE = "access-token";

	private static final Instant ISSUED_AT = Instant.now();

	private static final Instant EXPIRES_AT = Instant.from(ISSUED_AT).plusSeconds(60);

	private static final Set<String> SCOPES = new LinkedHashSet<>(Arrays.asList("scope1", "scope2"));

	@Test
	public void tokenTypeGetValueWhenTokenTypeBearerThenReturnBearer() {
		assertThat(OAuth2AccessToken.TokenType.BEARER.getValue()).isEqualTo("Bearer");
	}

	@Test
	public void constructorWhenTokenTypeIsNullThenThrowIllegalArgumentException() {
		assertThatIllegalArgumentException()
				.isThrownBy(() -> new OAuth2AccessToken(null, TOKEN_VALUE, ISSUED_AT, EXPIRES_AT));
	}

	@Test
	public void constructorWhenTokenValueIsNullThenThrowIllegalArgumentException() {
		assertThatIllegalArgumentException()
				.isThrownBy(() -> new OAuth2AccessToken(TOKEN_TYPE, null, ISSUED_AT, EXPIRES_AT));
	}

	@Test
	public void constructorWhenIssuedAtAfterExpiresAtThenThrowIllegalArgumentException() {
		assertThatIllegalArgumentException().isThrownBy(() -> new OAuth2AccessToken(TOKEN_TYPE, TOKEN_VALUE,
				Instant.from(EXPIRES_AT).plusSeconds(1), EXPIRES_AT));
	}

	@Test
	public void constructorWhenExpiresAtBeforeIssuedAtThenThrowIllegalArgumentException() {
		assertThatIllegalArgumentException().isThrownBy(() -> new OAuth2AccessToken(TOKEN_TYPE, TOKEN_VALUE, ISSUED_AT,
				Instant.from(ISSUED_AT).minusSeconds(1)));
	}

	@Test
	public void constructorWhenAllParametersProvidedAndValidThenCreated() {
		OAuth2AccessToken accessToken = new OAuth2AccessToken(TOKEN_TYPE, TOKEN_VALUE, ISSUED_AT, EXPIRES_AT, SCOPES);
		assertThat(accessToken.getTokenType()).isEqualTo(TOKEN_TYPE);
		assertThat(accessToken.getTokenValue()).isEqualTo(TOKEN_VALUE);
		assertThat(accessToken.getIssuedAt()).isEqualTo(ISSUED_AT);
		assertThat(accessToken.getExpiresAt()).isEqualTo(EXPIRES_AT);
		assertThat(accessToken.getScopes()).isEqualTo(SCOPES);
	}

	// gh-5492
	@Test
	public void constructorWhenCreatedThenIsSerializableAndDeserializable() {
		OAuth2AccessToken accessToken = new OAuth2AccessToken(TOKEN_TYPE, TOKEN_VALUE, ISSUED_AT, EXPIRES_AT, SCOPES);
		byte[] serialized = SerializationUtils.serialize(accessToken);
		accessToken = (OAuth2AccessToken) SerializationUtils.deserialize(serialized);
		assertThat(serialized).isNotNull();
		assertThat(accessToken.getTokenType()).isEqualTo(TOKEN_TYPE);
		assertThat(accessToken.getTokenValue()).isEqualTo(TOKEN_VALUE);
		assertThat(accessToken.getIssuedAt()).isEqualTo(ISSUED_AT);
		assertThat(accessToken.getExpiresAt()).isEqualTo(EXPIRES_AT);
		assertThat(accessToken.getScopes()).isEqualTo(SCOPES);
	}

}
