/*
  Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.

  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

      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 software.amazon.msk.auth.iam;

import software.amazon.msk.auth.iam.internals.AWSCredentialsCallback;
import software.amazon.msk.auth.iam.internals.SystemPropertyCredentialsUtils;
import org.junit.jupiter.api.Test;

import javax.security.auth.callback.Callback;
import javax.security.auth.callback.UnsupportedCallbackException;
import java.io.IOException;
import java.util.Collections;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

public class IAMClientCallbackHandlerTest {
    private static final String ACCESS_KEY_VALUE = "ACCESS_KEY_VALUE";
    private static final String SECRET_KEY_VALUE = "SECRET_KEY_VALUE";

    @Test
    public void testDefaultCredentials() throws IOException, UnsupportedCallbackException {
        IAMClientCallbackHandler clientCallbackHandler = new IAMClientCallbackHandler();
        clientCallbackHandler.configure(Collections.emptyMap(), "AWS_MSK_IAM", Collections.emptyList());
        SystemPropertyCredentialsUtils.runTestWithSystemPropertyCredentials(() -> {
            AWSCredentialsCallback callback = new AWSCredentialsCallback();
            try {
                clientCallbackHandler.handle(new Callback[]{callback});
            } catch (Exception e) {
                throw new RuntimeException("Test failed", e);
            }

            assertTrue(callback.isSuccessful());
            assertEquals(ACCESS_KEY_VALUE, callback.getAwsCredentials().getAWSAccessKeyId());
            assertEquals(SECRET_KEY_VALUE, callback.getAwsCredentials().getAWSSecretKey());
        }, ACCESS_KEY_VALUE, SECRET_KEY_VALUE);
    }

    @Test
    public void testDifferentMechanism() {
        IAMClientCallbackHandler clientCallbackHandler = new IAMClientCallbackHandler();
        assertThrows(IllegalArgumentException.class, () -> clientCallbackHandler
                .configure(Collections.emptyMap(), "SOME_OTHER_MECHANISM", Collections.emptyList()));
    }

    @Test
    public void testDifferentCallback() {
        IAMClientCallbackHandler clientCallbackHandler = new IAMClientCallbackHandler();
        UnsupportedCallbackException callbackException = assertThrows(UnsupportedCallbackException.class,
                () -> clientCallbackHandler.handle(new Callback[]{new Callback() {
                }}));
        assertTrue(callbackException.getMessage().startsWith("Unsupported"));
    }

    @Test
    public void testDebugClassString() {
        String debug1 = IAMClientCallbackHandler.debugClassString(this.getClass());
        assertTrue(debug1.contains("software.amazon.msk.auth.iam.IAMClientCallbackHandlerTest"));
        IAMClientCallbackHandler clientCallbackHandler = new IAMClientCallbackHandler();
        String debug2 = IAMClientCallbackHandler.debugClassString(clientCallbackHandler.getClass());
        assertTrue(debug2.contains("software.amazon.msk.auth.iam.IAMClientCallbackHandler"));
    }

}