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#include <policy/resource.h>
#include <policy/resources.h>
#include <policy/resource-set.h>

#include "resourcepolicyimpl.h"

ResourcePolicyImpl::ResourcePolicyImpl(QObject *parent)
    : QMediaPlayerResourceSetInterface(parent)
    , m_status(Initial)
    , m_videoEnabled(false)
{
    m_resourceSet = new ResourcePolicy::ResourceSet("player", this);
    m_resourceSet->setAlwaysReply();

    ResourcePolicy::AudioResource *audioResource = new ResourcePolicy::AudioResource("player");
    audioResource->setProcessID(QCoreApplication::applicationPid());
    audioResource->setStreamTag("media.name", "*");
    m_resourceSet->addResourceObject(audioResource);

    m_resourceSet->update();

    connect(m_resourceSet, SIGNAL(resourcesGranted(const QList<ResourcePolicy::ResourceType>)),
            this, SLOT(handleResourcesGranted()));
    connect(m_resourceSet, SIGNAL(resourcesDenied()),
            this, SLOT(handleResourcesDenied()));
    connect(m_resourceSet, SIGNAL(lostResources()),
            this, SLOT(handleResourcesLost()));
    connect(m_resourceSet, SIGNAL(resourcesReleasedByManager()),
            this, SLOT(handleResourcesLost()));
}

bool ResourcePolicyImpl::isVideoEnabled() const
{
    return m_videoEnabled;
}

void ResourcePolicyImpl::setVideoEnabled(bool videoEnabled)
{
    if (m_videoEnabled != videoEnabled) {
        m_videoEnabled = videoEnabled;

        if (videoEnabled)
            m_resourceSet->addResource(ResourcePolicy::VideoPlaybackType);
        else
            m_resourceSet->deleteResource(ResourcePolicy::VideoPlaybackType);

        m_resourceSet->update();
    }
}

void ResourcePolicyImpl::acquire()
{
    m_status = RequestedResource;
    m_resourceSet->acquire();
}

void ResourcePolicyImpl::release()
{
    m_resourceSet->release();
    m_status = Initial;
}

bool ResourcePolicyImpl::isGranted() const
{
    return m_status == GrantedResource;
}

bool ResourcePolicyImpl::isAvailable() const
{
    // TODO: is this used? what is it for?
    qWarning() << Q_FUNC_INFO << "Stub";
    return true;
}

void ResourcePolicyImpl::handleResourcesGranted()
{
    m_status = GrantedResource;
    emit resourcesGranted();
}

void ResourcePolicyImpl::handleResourcesDenied()
{
    m_status = Initial;
    emit resourcesDenied();
}

void ResourcePolicyImpl::handleResourcesLost()
{
    if (m_status != Initial) {
        m_status = Initial;
        emit resourcesLost();
    }

    m_resourceSet->release();
}