/*
* TestableAttachmentManager.cpp
*
* Copyright 2017 Amazon.com, Inc. or its affiliates.
*
* 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.
*/
#include "TestableAttachmentManager.h"
#include "TestableAttachmentWriter.h"

#include "AVSCommon/Utils/SDS/InProcessSDS.h"

namespace alexaClientSDK {
namespace acl {

/// A small value so we can create objects with a valid SDS (even if unused).
static const int DUMMY_SDS_BUFFER_SIZE = 100;

using namespace avsCommon::avs::attachment;
using namespace avsCommon::utils::sds;

using SDSType = avsCommon::utils::sds::InProcessSDS;
using SDSBufferType = avsCommon::utils::sds::InProcessSDSTraits::Buffer;

TestableAttachmentManager::TestableAttachmentManager() :
        AttachmentManager{AttachmentManager::AttachmentType::IN_PROCESS},
        m_manager{std::unique_ptr<AttachmentManager>(
                new AttachmentManager(AttachmentManager::AttachmentType::IN_PROCESS))} {
}

std::string TestableAttachmentManager::generateAttachmentId(
        const std::string & contextId, const std::string & contentId) const {
    return m_manager->generateAttachmentId(contextId, contentId);
}

bool TestableAttachmentManager::setAttachmentTimeoutMinutes(std::chrono::minutes timeoutMinutes) {
    return m_manager->setAttachmentTimeoutMinutes(timeoutMinutes);
}

std::unique_ptr<AttachmentWriter> TestableAttachmentManager::createWriter(const std::string & attachmentId) {
    // First, let's create a dummy SDS.  Otherwise we need to intantiate the writer with nullptr, which is
    // probably not a good idea.
    auto buffSize = SDSType::calculateBufferSize(DUMMY_SDS_BUFFER_SIZE);
    auto buff = std::make_shared<SDSBufferType>(buffSize);
    std::shared_ptr<SDSType> dummySDS = SDSType::create(buff);

    // Create the writer we will encapsulate in a TestableAttachmentWriter.
    auto writer = m_manager->createWriter(attachmentId);
    // Now create the wrapper class.
    std::unique_ptr<AttachmentWriter> testableWriter =
            std::unique_ptr<TestableAttachmentWriter>(new TestableAttachmentWriter(dummySDS, std::move(writer)));

    // Done!
    return testableWriter;
}

std::unique_ptr<AttachmentReader> TestableAttachmentManager::createReader(
        const std::string & attachmentId, AttachmentReader::Policy policy) {
    return m_manager->createReader(attachmentId, policy);
}

} // namespace acl
} // namespace alexaClientSDK