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#include "qmessageservice.h"

#include "qmfhelpers_p.h"

#include <qmailserviceaction.h>

#include <QTimer>

#include <qmessage_p.h>

QTM_BEGIN_NAMESPACE

namespace {

struct TextPartSearcher

{

    QString _search;

    TextPartSearcher(const QString &searchText) : _search(searchText) {}

    bool operator()(const QMailMessagePart &part)

    {

        if (part.contentType().type().toLower() == "text") {

            if (part.body().data().contains(_search, Qt::CaseInsensitive)) {

                // We have located some matching text - stop the traversal

                return false;

            }

        }

        return true;

    }

};

}

using namespace QmfHelpers;

class QMessageServicePrivate : public QObject

{

    Q_OBJECT

public:

    QMessageServicePrivate();

    QMailTransmitAction _transmit;

    QMailRetrievalAction _retrieval;

    QMailServiceAction *_active;

    QMessageManager::Error _error;

    bool _activeStoreAction;

    QList<QMessageId> _matchingIds;

    QList<QMailMessageId> _candidateIds;

    QMessageFilter _lastFilter;

    QMessageSortOrder _lastOrdering;

    QString _match;

    int _limit;

    int _offset;

    QMailMessageIdList _transmitIds;

    bool isBusy() const;

signals:

    void stateChanged(QMessageService::State);

    void progressChanged(uint, uint);

    void messagesFound(const QMessageIdList&);

    void messagesCounted(int);

protected slots:

    void transmitActivityChanged(QMailServiceAction::Activity a);

    void retrievalActivityChanged(QMailServiceAction::Activity a);

    void statusChanged(const QMailServiceAction::Status &s);

    void completed();

    void reportMatchingIds();

    void reportMatchingCount();

    void findMatchingIds();

    void testNextMessage();

private:

    bool messageMatch(const QMailMessageId &messageid);

};

QMessageServicePrivate::QMessageServicePrivate()

    : QObject(),

      _active(0),

      _error(QMessageManager::NoError),

      _activeStoreAction(false),

      _limit(0),

      _offset(0)

{

    connect(&_transmit, SIGNAL(activityChanged(QMailServiceAction::Activity)), this, SLOT(transmitActivityChanged(QMailServiceAction::Activity)));

    connect(&_transmit, SIGNAL(statusChanged(QMailServiceAction::Status)), this, SLOT(statusChanged(QMailServiceAction::Status)));

    connect(&_retrieval, SIGNAL(activityChanged(QMailServiceAction::Activity)), this, SLOT(retrievalActivityChanged(QMailServiceAction::Activity)));

    connect(&_retrieval, SIGNAL(statusChanged(QMailServiceAction::Status)), this, SLOT(statusChanged(QMailServiceAction::Status)));

}

bool QMessageServicePrivate::isBusy() const

{

    if ((_active && ((_active->activity() == QMailServiceAction::Pending) || (_active->activity() == QMailServiceAction::InProgress))) ||

        _activeStoreAction) {

        qWarning() << "Action is currently busy";

        return true;

    }

    return false;

}

void QMessageServicePrivate::transmitActivityChanged(QMailServiceAction::Activity a)

{

    if (a == QMailServiceAction::Successful) {

        if (!_transmitIds.isEmpty()) {

            // If these messages were transmitted, we need to move them to Sent folder

            QMailMessageKey filter(QMailMessageKey::id(_transmitIds));

            foreach (const QMailMessageId &id, QMailStore::instance()->queryMessages(filter & QMailMessageKey::status(QMailMessage::Sent))) {

                QMessage message(convert(id));

                QMessagePrivate::setStandardFolder(message,QMessage::SentFolder);

                if (!QMessageManager().updateMessage(&message)) {

                    qWarning() << "Unable to mark message as sent!";

                }

            }

            _transmitIds.clear();

        }

    } else if (a == QMailServiceAction::Failed) {

        _transmitIds.clear();

        if (_error == QMessageManager::NoError) {

            // We may have failed due to some part of the request remaining incomplete

            _error = QMessageManager::RequestIncomplete;

        }

    }

    emit stateChanged(convert(a));

}

void QMessageServicePrivate::statusChanged(const QMailServiceAction::Status &s)

{

    if (s.errorCode != QMailServiceAction::Status::ErrNoError) {

        qWarning() << QString("Service error %1: \"%2\"").arg(s.errorCode).arg(s.text);

        if (s.errorCode == QMailServiceAction::Status::ErrNotImplemented) {

            _error = QMessageManager::NotYetImplemented;

        } else if ((s.errorCode == QMailServiceAction::Status::ErrNonexistentMessage) ||

                   (s.errorCode == QMailServiceAction::Status::ErrEnqueueFailed) ||

                   (s.errorCode == QMailServiceAction::Status::ErrInvalidAddress) ||

                   (s.errorCode == QMailServiceAction::Status::ErrInvalidData)) {

            _error = QMessageManager::ConstraintFailure;

        } else {

            _error = QMessageManager::FrameworkFault;

        }

    }

}

void QMessageServicePrivate::retrievalActivityChanged(QMailServiceAction::Activity a)

{

    if ((a == QMailServiceAction::Failed) && (_error == QMessageManager::NoError)) {

        // We may have failed due to some part of the request remaining incomplete

        _error = QMessageManager::RequestIncomplete;

    }

    emit stateChanged(convert(a));

}

void QMessageServicePrivate::completed()

{

    _activeStoreAction = false;

    emit stateChanged(QMessageService::FinishedState);

}

bool QMessageServicePrivate::messageMatch(const QMailMessageId &messageId)

{

    if (_match.isEmpty()) {

        return true;

    }

    const QMailMessage candidate(messageId);

    if (candidate.id().isValid()) {

        // Search only messages or message parts that are of type 'text/*'

        if (candidate.hasBody()) {

            if (candidate.contentType().type().toLower() == "text") {

                if (candidate.body().data().contains(_match, Qt::CaseInsensitive))

                    return true;

            }

        } else if (candidate.multipartType() != QMailMessage::MultipartNone) {

            // Search all 'text/*' parts within this message

            TextPartSearcher searcher(_match);

            if (candidate.foreachPart<TextPartSearcher&>(searcher) == false) {

                // We found a matching part in the message

                return true;

            }

        }

    }

    return false;

}

void QMessageServicePrivate::reportMatchingIds()

{

    emit messagesFound(convert(_candidateIds));

    completed();

}

void QMessageServicePrivate::reportMatchingCount()

{

    emit messagesCounted(_candidateIds.count());

    completed();

}

void QMessageServicePrivate::findMatchingIds()

{

    int required = ((_offset + _limit) - _matchingIds.count());

    // Are any of the existing IDs part of the result set?

    if (required < _limit) {

        emit messagesFound(_matchingIds.mid(_offset, _limit));

    }

    if ((required > 0 || _limit == 0) && !_candidateIds.isEmpty()) {

        QTimer::singleShot(0, this, SLOT(testNextMessage()));

    } else {

        completed();

    }

}

void QMessageServicePrivate::testNextMessage()

{

    int required = ((_offset + _limit) - _matchingIds.count());

    if (required > 0 || _limit==0) {

        QMailMessageId messageId(_candidateIds.takeFirst());

        if (messageMatch(messageId)) {

            _matchingIds.append(convert(messageId));

            --required;

            if (required < _limit) {

                // This is within the result set

                emit messagesFound(QMessageIdList() << _matchingIds.last());

            }

        }

        if ((required > 0 || _limit == 0) && !_candidateIds.isEmpty()) {

            QTimer::singleShot(0, this, SLOT(testNextMessage()));

            return;

        }

    }

    completed();

}

QMessageService::QMessageService(QObject *parent)

    : QObject(parent),

      d_ptr(new QMessageServicePrivate)

{

    // Ensure the message store is initialized

    QMessageManager();

    connect(d_ptr, SIGNAL(stateChanged(QMessageService::State)), 

            this, SIGNAL(stateChanged(QMessageService::State)));

    connect(d_ptr, SIGNAL(messagesFound(QMessageIdList)), 

            this, SIGNAL(messagesFound(QMessageIdList)));

    connect(d_ptr, SIGNAL(messagesCounted(int)), 

            this, SIGNAL(messagesCounted(int)));

    connect(d_ptr, SIGNAL(progressChanged(uint, uint)), 

            this, SIGNAL(progressChanged(uint, uint)));

}

QMessageService::~QMessageService()

{

    delete d_ptr;

}

bool QMessageService::queryMessages(const QMessageFilter &filter, const QMessageSortOrder &sortOrder, uint limit, uint offset)

{

    if (d_ptr->isBusy()) {

        return false;

    }

    d_ptr->_active = 0;

    d_ptr->_activeStoreAction = true;

    emit stateChanged(QMessageService::ActiveState);

    d_ptr->_candidateIds = QMailStore::instance()->queryMessages(convert(filter), convert(sortOrder), limit, offset);

    d_ptr->_error = convert(QMailStore::instance()->lastError());

    if (d_ptr->_error == QMessageManager::NoError) {

        d_ptr->_lastFilter = QMessageFilter();

        d_ptr->_lastOrdering = QMessageSortOrder();

        d_ptr->_match = QString();

        d_ptr->_limit = static_cast<int>(limit);

        d_ptr->_offset = 0;

        d_ptr->_matchingIds.clear();

        QTimer::singleShot(0, d_ptr, SLOT(reportMatchingIds()));

        return true;

    }

    return false;

}

bool QMessageService::queryMessages(const QMessageFilter &filter, const QString &body, QMessageDataComparator::MatchFlags matchFlags, const QMessageSortOrder &sortOrder, uint limit, uint offset)

{

    if (matchFlags) {

        //TODO: Support matchFlags

        return false;

    }

    if (body.isEmpty()) {

        return queryMessages(filter, sortOrder, limit, offset);

    }

    if (d_ptr->isBusy()) {

        return false;

    }

    d_ptr->_active = 0;

    d_ptr->_activeStoreAction = true;

    emit stateChanged(QMessageService::ActiveState);

    if ((filter == d_ptr->_lastFilter) && (sortOrder == d_ptr->_lastOrdering) && (body == d_ptr->_match)) {

        // This is a continuation of the last search

        d_ptr->_limit = static_cast<int>(limit);

        d_ptr->_offset = static_cast<int>(offset);

        QTimer::singleShot(0, d_ptr, SLOT(findMatchingIds()));

        return true;

    }

    // Find all messages to perform the body search on

    d_ptr->_candidateIds = QMailStore::instance()->queryMessages(convert(filter), convert(sortOrder));

    d_ptr->_error = convert(QMailStore::instance()->lastError());

    if (d_ptr->_error == QMessageManager::NoError) {

        d_ptr->_lastFilter = filter;

        d_ptr->_lastOrdering = sortOrder;

        d_ptr->_match = body;

        d_ptr->_limit = static_cast<int>(limit);

        d_ptr->_offset = static_cast<int>(offset);

        d_ptr->_matchingIds.clear();

        QTimer::singleShot(0, d_ptr, SLOT(findMatchingIds()));

        return true;

    }

    return false;

}

bool QMessageService::countMessages(const QMessageFilter &filter)

{

    if (d_ptr->isBusy()) {

        return false;

    }

    d_ptr->_active = 0;

    d_ptr->_activeStoreAction = true;

    d_ptr->_candidateIds = QMailStore::instance()->queryMessages(convert(filter));

    d_ptr->_error = convert(QMailStore::instance()->lastError());

    if (d_ptr->_error == QMessageManager::NoError) {

        d_ptr->_lastFilter = QMessageFilter();

        d_ptr->_lastOrdering = QMessageSortOrder();

        d_ptr->_match = QString();

        d_ptr->_limit = 0;

        d_ptr->_offset = 0;

        d_ptr->_matchingIds.clear();

        QTimer::singleShot(0, d_ptr, SLOT(reportMatchingCount()));

        return true;

    }

    return false;

}

bool QMessageService::send(QMessage &message)

{

    if (d_ptr->isBusy()) {

        return false;

    }

    d_ptr->_active = 0;

    if (!message.parentAccountId().isValid()) {

        // Attach to the default account

        message.setParentAccountId(QMessageAccount::defaultAccount(message.type()));

        if (!message.parentAccountId().isValid()) {

            d_ptr->_error = QMessageManager::InvalidId;

            qWarning() << "Invalid message account ID";

            return false;

        }

    }

    // Ensure the message contains a timestamp

    if (!message.date().isValid()) {

        message.setDate(QDateTime::currentDateTime());

    }

    QMessageFolderId existingFolderId(message.parentFolderId());

    // Move the message to the Outbox folder

    QMessagePrivate::setStandardFolder(message,QMessage::OutboxFolder);

    QMailMessage *msg(convert(&message));

    // Ensure that the from address is added

    if (msg->from().isNull()) {

        QMailAccount account(msg->parentAccountId());

        msg->setFrom(account.fromAddress());

    }

    // Mark this message as outgoing

    msg->setStatus(QMailMessage::Outbox, true);

    if (msg->id().isValid()) {

        // Update the message

        if (!QMailStore::instance()->updateMessage(msg)) {

            d_ptr->_error = QMessageManager::FrameworkFault;

            qWarning() << "Unable to mark message as outgoing";

            return false;

        }

    } else {

        // Add this message to the store

        if (!QMailStore::instance()->addMessage(msg)) {

            d_ptr->_error = QMessageManager::FrameworkFault;

            qWarning() << "Unable to store message for transmission";

            return false;

        }

    }

    d_ptr->_transmitIds = QMailStore::instance()->queryMessages(QMailMessageKey::status(QMailMessage::Outgoing) & QMailMessageKey::parentAccountId(msg->parentAccountId()));

    d_ptr->_error = QMessageManager::NoError;

    d_ptr->_active = &d_ptr->_transmit;

    d_ptr->_transmit.transmitMessages(msg->parentAccountId());

    return true;

}

bool QMessageService::compose(const QMessage &message)

{

    if (d_ptr->isBusy()) {

        return false;

    }

    d_ptr->_active = 0;

    // TODO: To be implemented by integrator

    d_ptr->_error = QMessageManager::NotYetImplemented;

    qWarning() << "QMessageService::compose not yet implemented";

    return false;

    Q_UNUSED(message)

}

bool QMessageService::retrieveHeader(const QMessageId& id)

{

    if (d_ptr->isBusy()) {

        return false;

    }

    d_ptr->_active = 0;

    QMailMessageId messageId(convert(id));

    if (!messageId.isValid()) {

        d_ptr->_error = QMessageManager::InvalidId;

        qWarning() << "Invalid message ID";

        return false;

    }

    // Operation is not relevant to QMF - meta data retrieval always includes header information

    d_ptr->_error = QMessageManager::NoError;

    d_ptr->_active = 0;

    QTimer::singleShot(0, d_ptr, SLOT(completed()));

    return true;

}

bool QMessageService::retrieveBody(const QMessageId& id)

{

    if (d_ptr->isBusy()) {

        return false;

    }

    d_ptr->_active = 0;

    QMailMessageId messageId(convert(id));

    if (!messageId.isValid()) {

        d_ptr->_error = QMessageManager::InvalidId;

        qWarning() << "Invalid message ID";

        return false;

    }

    d_ptr->_error = QMessageManager::NoError;

    d_ptr->_active = &d_ptr->_retrieval;

    d_ptr->_retrieval.retrieveMessages(QMailMessageIdList() << messageId, QMailRetrievalAction::Content);

    return true;

}

bool QMessageService::retrieve(const QMessageId &messageId, const QMessageContentContainerId& id)

{

    if (d_ptr->isBusy()) {