/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file 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.apache.camel.component.aws2.s3.integration;

import java.io.InputStream;
import java.security.SecureRandom;
import java.util.Base64;
import java.util.List;
import java.util.UUID;

import javax.crypto.KeyGenerator;

import org.apache.camel.EndpointInject;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.component.aws2.s3.AWS2S3Constants;
import org.apache.camel.component.aws2.s3.AWS2S3Operations;
import org.apache.camel.component.mock.MockEndpoint;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import software.amazon.awssdk.services.s3.model.GetObjectRequest;
import software.amazon.awssdk.utils.Md5Utils;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.fail;
import static software.amazon.awssdk.services.s3.model.ServerSideEncryption.AES256;

public class S3CopyObjectCustomerKeyIT extends Aws2S3Base {

    String key = UUID.randomUUID().toString();
    byte[] secretKey = generateSecretKey();
    String b64Key = Base64.getEncoder().encodeToString(secretKey);
    String b64KeyMd5 = Md5Utils.md5AsBase64(secretKey);

    @EndpointInject
    private ProducerTemplate template;

    @EndpointInject("mock:result")
    private MockEndpoint result;

    @Test
    public void sendIn() throws Exception {
        result.expectedMessageCount(1);

        template.send("direct:putObject", new Processor() {

            @Override
            public void process(Exchange exchange) {
                exchange.getIn().setHeader(AWS2S3Constants.KEY, "test.txt");
                exchange.getIn().setBody("Test");
            }
        });

        template.send("direct:copyObject", new Processor() {

            @Override
            public void process(Exchange exchange) {
                exchange.getIn().setHeader(AWS2S3Constants.KEY, "test.txt");
                exchange.getIn().setHeader(AWS2S3Constants.DESTINATION_KEY, "test1.txt");
                exchange.getIn().setHeader(AWS2S3Constants.BUCKET_DESTINATION_NAME, "mycamel1");
                exchange.getIn().setHeader(AWS2S3Constants.S3_OPERATION, AWS2S3Operations.copyObject);
            }
        });

        Exchange res = template.request("direct:getObject", new Processor() {

            @Override
            public void process(Exchange exchange) {
                GetObjectRequest getObjectRequest = GetObjectRequest.builder()
                        .key("test1.txt")
                        .bucket("mycamel1")
                        .sseCustomerKey(b64Key)
                        .sseCustomerAlgorithm(AES256.name())
                        .sseCustomerKeyMD5(b64KeyMd5)
                        .build();
                exchange.getIn().setHeader(AWS2S3Constants.S3_OPERATION, AWS2S3Operations.getObject);
                exchange.getIn().setBody(getObjectRequest);
            }
        });

        InputStream is = res.getIn().getBody(InputStream.class);
        Assertions.assertNotNull(is);
        assertEquals("Test", context.getTypeConverter().convertTo(String.class, is));

        Exchange res1 = template.request("direct:listObject", new Processor() {

            @Override
            public void process(Exchange exchange) {
                exchange.getIn().setHeader(AWS2S3Constants.S3_OPERATION, AWS2S3Operations.listObjects);
            }
        });

        List response = res1.getIn().getBody(List.class);

        assertEquals(1, response.size());

        assertMockEndpointsSatisfied();
    }

    @Override
    protected RouteBuilder createRouteBuilder() {
        return new RouteBuilder() {
            @Override
            public void configure() {
                String awsEndpoint = "aws2-s3://mycamel?autoCreateBucket=true&useCustomerKey=true&customerKeyId=RAW(" + b64Key
                                     + ")&customerKeyMD5=RAW(" + b64KeyMd5 + ")&customerAlgorithm=" + AES256.name();
                String awsEndpoint1 = "aws2-s3://mycamel1?autoCreateBucket=true&pojoRequest=true";
                String awsEndpoint2 = "aws2-s3://mycamel1?autoCreateBucket=true";
                from("direct:putObject").setHeader(AWS2S3Constants.KEY, constant("test.txt")).setBody(constant("Test"))
                        .to(awsEndpoint);

                from("direct:copyObject").to(awsEndpoint);

                from("direct:listObject").to(awsEndpoint2);

                from("direct:getObject").to(awsEndpoint1).to("mock:result");

            }
        };
    }

    protected static byte[] generateSecretKey() {
        KeyGenerator generator;
        try {
            generator = KeyGenerator.getInstance("AES");
            generator.init(256, new SecureRandom());
            return generator.generateKey().getEncoded();
        } catch (Exception e) {
            fail("Unable to generate symmetric key: " + e.getMessage());
            return null;
        }
    }

}
