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//
// Copyright (c) 2004-2021 musikcube team
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//////////////////////////////////////////////////////////////////////////////

#include "pch.hpp"

#include <musikcore/io/DataStreamFactory.h>
#include <musikcore/config.h>
#include <musikcore/plugin/PluginFactory.h>
#include <musikcore/io/LocalFileStream.h>

using namespace musik::core::io;
using namespace musik::core::sdk;

using DataStreamPtr = DataStreamFactory::DataStreamPtr;
using StreamDeleter = musik::core::PluginFactory::ReleaseDeleter<IDataStream>;

DataStreamFactory::DataStreamFactory() {
    typedef IDataStreamFactory PluginType;
    typedef musik::core::PluginFactory::ReleaseDeleter<PluginType> Deleter;

    this->dataStreamFactories = musik::core::PluginFactory::Instance()
        .QueryInterface<PluginType, Deleter>("GetDataStreamFactory");
}

DataStreamFactory* DataStreamFactory::Instance() {
    static DataStreamFactory* instance = NULL;

    if (instance == NULL) {
        instance = new DataStreamFactory();
    }

    return instance;
}

IDataStream* DataStreamFactory::OpenDataStream(const char* uri, OpenFlags flags) {
    typedef musik::core::PluginFactory::ReleaseDeleter<IDataStream> StreamDeleter;

    if (uri) {
        /* plugins get the first crack at the uri */
        for (const auto factory : DataStreamFactory::Instance()->dataStreamFactories) {
            if (factory->CanRead(uri)) {
                IDataStream* dataStream = factory->Open(uri, flags);

                if (dataStream) {
                    return dataStream;
                }
            }
        }

        /* no plugins accepted it? try to open as a local file */
        IDataStream* regularFile = new LocalFileStream();
        if (regularFile->Open(uri, flags)) {
            return regularFile;
        }
        else {
            regularFile->Release();
        }
    }

    return nullptr;
}

DataStreamPtr DataStreamFactory::OpenSharedDataStream(const char *uri, OpenFlags flags) {
    auto stream = OpenDataStream(uri, flags);
    return stream ? DataStreamPtr(stream, StreamDeleter()) : DataStreamPtr();
}
