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#include "qcontactmanager.h"

#include "qcontactmanager_p.h"

#include "qcontactmanagerengine.h"

#include "qcontactmanagerenginefactory.h"

#include "qcontact_p.h"

#include "qcontactaction.h"

#include "qcontactactiondescriptor.h"

#include "qcontactactionfactory.h"

#include <QSharedData>

#include <QtPlugin>

#include <QPluginLoader>

#include <QDebug>

#include <QDir>

#include <QFile>

#include <QApplication>

#if defined(Q_OS_SYMBIAN)

# include <f32file.h>

#endif

#include "qcontactmemorybackend_p.h"

#include "qcontactinvalidbackend_p.h"

QTM_BEGIN_NAMESPACE

/* Shared QContactManager stuff here, default engine stuff below */

QList<QContactActionFactory*> QContactManagerData::m_actionfactories; // list of all factories

QList<QContactActionDescriptor> QContactManagerData::m_descriptors;

QHash<QString, QContactManagerEngineFactory*> QContactManagerData::m_engines;

QContactManagerData::DescriptorHash QContactManagerData::m_descriptormap;

QHash<QString, int> QContactManagerData::m_vendormap;

QHash<QString, int> QContactManagerData::m_actionmap;

bool QContactManagerData::m_discovered;

bool QContactManagerData::m_discoveredStatic;

QStringList QContactManagerData::m_pluginPaths;

static void qContactsCleanEngines()

{

    QContactManagerData::m_discovered = false;

    QList<QContactManagerEngineFactory*> factories = QContactManagerData::m_engines.values();

    QList<QContactActionFactory*> actionfactories = QContactManagerData::m_actionfactories;

    for (int i=0; i < factories.count(); i++) {

        delete factories.at(i);

    }

    for(int i=0; i < actionfactories.count(); i++) {

        delete actionfactories.at(i);

    }

    QContactManagerData::m_engines.clear();

    QContactManagerData::m_actionfactories.clear();

    QContactManagerData::m_descriptors.clear();

    QContactManagerData::m_descriptormap.clear();

    QContactManagerData::m_actionmap.clear();

    QContactManagerData::m_vendormap.clear();

}

static int parameterValue(const QMap<QString, QString>& parameters, const char* key, int defaultValue)

{

    if (parameters.contains(QString::fromAscii(key))) {

        bool ok;

        int version = parameters.value(QString::fromAscii(key)).toInt(&ok);

        if (ok)

            return version;

    }

    return defaultValue;

}

void QContactManagerData::createEngine(const QString& managerName, const QMap<QString, QString>& parameters)

{

    m_engine = 0;

    QString builtManagerName = managerName.isEmpty() ? QContactManager::availableManagers().value(0) : managerName;

    if (builtManagerName == QLatin1String("memory")) {

        m_engine = QContactMemoryEngine::createMemoryEngine(parameters);

    } else {

        int implementationVersion = parameterValue(parameters, QTCONTACTS_IMPLEMENTATION_VERSION_NAME, -1);

        bool found = false;

        bool loadedDynamic = false;

        /* First check static factories */

        loadStaticFactories();

        /* See if we got a fast hit */

        QList<QContactManagerEngineFactory*> factories = m_engines.values(builtManagerName);

        m_error = QContactManager::NoError;

        while(!found) {

            foreach (QContactManagerEngineFactory* f, factories) {

                QList<int> versions = f->supportedImplementationVersions();

                if (implementationVersion == -1 ||//no given implementation version required

                        versions.isEmpty() || //the manager engine factory does not report any version

                        versions.contains(implementationVersion)) {

                    found = true;

                    break;

                }

            }

            // Break if found or if this is the second time through

            if (loadedDynamic || found)

                break;

            // otherwise load dynamic factories and reloop

            loadFactories();

            factories = m_engines.values(builtManagerName);

            loadedDynamic = true;

        }

        // XXX remove this

        // the engine factory could lie to us, so check the real implementation version

        if (m_engine && (implementationVersion != -1 && m_engine->managerVersion() != implementationVersion)) {

            m_error = QContactManager::VersionMismatchError;

            m_engine = 0;

        }

        if (!m_engine) {

            if (m_error == QContactManager::NoError)

                m_error = QContactManager::DoesNotExistError;

        }

    }

}

void QContactManagerData::loadStaticFactories()

{

    if (!m_discoveredStatic) {

        m_discoveredStatic = true;

        /* Clean stuff up at the end */

        qAddPostRoutine(qContactsCleanEngines);

        /* Loop over all the static plugins */

        QObjectList staticPlugins = QPluginLoader::staticInstances();

        for (int i=0; i < staticPlugins.count(); i++ ){

            QContactManagerEngineFactory *f = qobject_cast<QContactManagerEngineFactory*>(staticPlugins.at(i));

            QContactActionFactory *g = qobject_cast<QContactActionFactory*>(staticPlugins.at(i));

            if (f) {

                QString name = f->managerName();

                if (name != QLatin1String("memory") && name != QLatin1String("invalid") && !name.isEmpty()) {

                    // we also need to ensure that we haven't already loaded this factory.

                    if (m_engines.keys().contains(name)) {

                        qWarning() << "Static contacts plugin" << name << "has the same name as a currently loaded plugin; ignored";

                    } else {

                        m_engines.insertMulti(name, f);

                    }

                } else {

                    qWarning() << "Static contacts plugin with reserved name" << name << "ignored";

                }

            }

            if (g) {

                QString name = g->name();

                if (m_actionfactories.contains(g)) {

                    qWarning() << "Static contacts plugin" << name << "has the same name as currently loaded plugin; ignored";

                } else {

                    m_actionfactories.append(g);

                    QList<QContactActionDescriptor> actions = g->actionDescriptors();

                    QMap<QContactActionDescriptor, QContactActionFactory*>::iterator it;

                    for (int j = 0; j < actions.size(); j++) {

                        QContactActionDescriptor desc = actions.at(j);

                        m_descriptormap.insert(desc, g);

                        m_descriptors.append(desc);

                        m_actionmap.insertMulti(desc.actionName(), m_descriptors.count() - 1);

                        m_vendormap.insertMulti(desc.vendorName(), m_descriptors.count() - 1);

                    }

                }

            }

        }

    }

}

/* Plugin loader */

void QContactManagerData::loadFactories()

{

    // Always do this..

    loadStaticFactories();

    if (!m_discovered || QApplication::libraryPaths() != m_pluginPaths) {

        m_discovered = true;

        m_pluginPaths = QApplication::libraryPaths();

        /* Discover a bunch o plugins */

        QStringList plugins;

        QStringList paths;

        QSet<QString> processed;

        paths << QApplication::applicationDirPath() << QApplication::libraryPaths();

        /* Enumerate our plugin paths */

        for (int i=0; i < paths.count(); i++) {

            if (processed.contains(paths.at(i)))

                continue;

            processed.insert(paths.at(i));

            QDir pluginsDir(paths.at(i));

                continue;

#if defined(Q_OS_WIN)

            if (pluginsDir.dirName().toLower() == QLatin1String("debug") || pluginsDir.dirName().toLower() == QLatin1String("release"))

                pluginsDir.cdUp();

#elif defined(Q_OS_MAC)

            if (pluginsDir.dirName() == QLatin1String("MacOS")) {

                pluginsDir.cdUp();

                pluginsDir.cdUp();

                pluginsDir.cdUp();

            }

#endif

#endif

                for (int j=0; j < files.count(); j++) {

                }

            }

        }

        /* Now discover the dynamic plugins */

        for (int i=0; i < plugins.count(); i++) {

            QPluginLoader qpl(plugins.at(i));

            QContactManagerEngineFactory *f = qobject_cast<QContactManagerEngineFactory*>(qpl.instance());

            QContactActionFactory *g = qobject_cast<QContactActionFactory*>(qpl.instance());

            if (f) {

                QString name = f->managerName();

                if (name != QLatin1String("memory") && name != QLatin1String("invalid") && !name.isEmpty()) {

                    // we also need to ensure that we haven't already loaded this factory.

                    if (m_engines.keys().contains(name)) {

                        qWarning() << "Contacts plugin" << plugins.at(i) << "has the same name as currently loaded plugin" << name << "; ignored";

                    } else {

                        m_engines.insertMulti(name, f);

                    }

                } else {

                    qWarning() << "Contacts plugin" << plugins.at(i) << "with reserved name" << name << "ignored";

                }

            }

            if (g) {

                QString name = g->name();

                // we also need to ensure that we haven't already loaded this factory.

                if (m_actionfactories.contains(g)) {

                    qWarning() << "Contacts plugin" << plugins.at(i) << "has the same name as currently loaded plugin" << name << "; ignored";

                } else {

                    m_actionfactories.append(g);

                    QList<QContactActionDescriptor> actions = g->actionDescriptors();

                    QMap<QContactActionDescriptor, QContactActionFactory*>::iterator it;

                    for (int j = 0; j < actions.size(); j++) {

                        const QContactActionDescriptor& desc = actions.at(j);

                        m_descriptormap.insert(desc, g);

                        m_descriptors.append(desc);

                        m_actionmap.insertMulti(desc.actionName(), m_descriptors.count() - 1);

                        m_vendormap.insertMulti(desc.vendorName(), m_descriptors.count() - 1);

                    }

                }

            }

            /* Debugging */

                qDebug() << "Unknown plugin:" << qpl.errorString();

                if (qpl.instance()) {

                    qDebug() << "[qobject:" << qpl.instance() << "]";

                }

            }

        }

        QStringList engineNames;

        foreach (QContactManagerEngineFactory* f, m_engines.values()) {

            QStringList versions;

            foreach (int v, f->supportedImplementationVersions()) {

                versions << QString::fromAscii("%1").arg(v);

            }

            engineNames << QString::fromAscii("%1[%2]").arg(f->managerName()).arg(versions.join(QString::fromAscii(",")));

        }

    }

}

QList<QContactActionDescriptor> QContactManagerData::actionDescriptors(const QString& actionName, const QString& vendorName, int implementationVersion)

{

    loadFactories();

    bool restrict = false;

    QSet<int> subset;

    QList<QContactActionDescriptor> descriptors;

    // Go through our list of descriptors, looking for a match

    if (!actionName.isEmpty()) {

        subset = m_actionmap.values(actionName).toSet();

        restrict = true;

    }

    if (!vendorName.isEmpty()) {

        if (restrict)

            subset &= m_vendormap.values(vendorName).toSet();

        else

            subset = m_vendormap.values(vendorName).toSet();

        restrict = true;

        /* We still have to check versions, since we don't hash that */

        if (implementationVersion != -1) {

            QMutableSetIterator<int> it(subset);

            while(it.hasNext()) {

                if (m_descriptors.at(it.next()).implementationVersion() != implementationVersion)

                    it.remove();

            }

        }

    }

    if (restrict) {

        QSetIterator<int> it(subset);

        while(it.hasNext()) {

            descriptors << m_descriptors.at(it.next());

        }

    } else {

        /* No restrictions, just iterate over all descriptors and return all actions (!) */

        descriptors = m_descriptors;

    }

    return descriptors;

}

QContactAction* QContactManagerData::action(const QContactActionDescriptor& actionDescriptor)

{

    loadFactories();

    QContactActionFactory* actionFactory = m_descriptormap.value(actionDescriptor, 0);

    if (actionFactory)

        return actionFactory->instance(actionDescriptor);

    return 0;

}

// trampoline for private classes

QContactManagerEngine* QContactManagerData::engine(const QContactManager* manager)

{

    if (manager)

        return manager->d->m_engine;

    return 0;

}

QTM_END_NAMESPACE