/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#include <QStringList>

#include <QtAlgorithms>

#include <HbGlobal>

#include <msgitem.h>

#include "cnthistorymodel_p.h"

#include "cnthistorymodel.h"

// Unnamed namespace for helper functions

namespace

{

    bool greaterThan(const HItemPointer& t1, const HItemPointer& t2)

    {

        return t1.data()->timeStamp > t2.data()->timeStamp;

    }

    bool lessThan(const HItemPointer& t1, const HItemPointer& t2)

    {

        return t1.data()->timeStamp < t2.data()->timeStamp;

    }

}

Q_DECLARE_METATYPE(LogsEvent *)

/*!

 * Construct a new CntHistoryModel object to communicate 

 * with the conversations and logs databases.

 *

 * \param contactId History specific to this contact is cached. 

 * If no contact is specified all the call logs and conversation 

 * history from all contacts will be cached.

 */

CntHistoryModel::CntHistoryModel(QContactLocalId contactId,

                                 QContactManager* manager,

                                 QObject *parent)

    : QAbstractListModel(parent)

{

    d = new CntHistoryModelData(contactId, manager);

    // Check if the contact is my card

    if (d->m_contactId == d->m_contactManager->selfContactId()) {

        d->m_isMyCard = true;

    }

    else {

        d->m_isMyCard = false;

    }

    // Create the model structure and cache history data from the databases

    initializeModel();

}

CntHistoryModel::~CntHistoryModel()

{

}

/*!

 * Return the data to be used by the view or delegates for a particular

 * item and role.

 *

 * \param index The index of the item to return data about.

 * \param role The data should be relevant to this particular purpose.

 * \return QVariant The data for the specified index and role.

 */

QVariant CntHistoryModel::data(const QModelIndex& index, int role) const

{

    // Invalid index

    int row = index.row();

    if ( !validateRowIndex(row) )

        return QVariant();

    HItemPointer p = d->m_List.at(row);

    if ( p.isNull() )

        return QVariant();

    switch( role )

    {       

        case Qt::DisplayRole:

            return displayRoleData(*p);

        case Qt::DecorationRole:

            return QVariant((*p).iconPath);

        case SeenStatusRole:

            return QVariant((*p).seenStatus);

        case DirectionRole:

            return QVariant((*p).direction);

        case ItemTypeRole:

            return QVariant((*p).msgType);

        case PhoneNumberRole:

            return QVariant((*p).number);

        default:

            return QVariant();

    }

}

/*!

 * Return the data to be used by the view for a display role.

 *

 * \param column The column of the item to return data about.

 *  return QVariant List of strings to be displayed on the view.

 *  The stings can also be NULL

 *  index 0 Title of the conversation item.

 *  index 1 Body text

 *  index 2 Time stamp

 */

QVariant CntHistoryModel::displayRoleData(const HistoryItem& item) const

{

    QStringList list;

    list << item.title << item.message << item.timeStamp.toString();

    return QVariant(list);

}

/*!

 * Get the number of rows (conversations) in this model.

 *

 * \param parent Optional parent index value.

 * \return Number of rows in this model.

 */

int CntHistoryModel::rowCount(const QModelIndex& /*parent*/) const

{

    return d->m_List.size();

}

/*!

 * Sort list items on the model.

 *

 * \param column Column to be sorted. It is not used.

 * \param order Order to sort the list items.

 */

void CntHistoryModel::sort(int /*column*/, Qt::SortOrder order)

{

    if ( order == Qt::AscendingOrder )

        qStableSort(d->m_List.begin(), d->m_List.end(), lessThan);

    else

        qStableSort(d->m_List.begin(), d->m_List.end(), greaterThan);

}

/*!

 * Clear history from the database. If the history cached

 * is specific to one contact, only that history is cleared.

 * 

 */

void CntHistoryModel::clearHistory()

{

    if ( d->m_List.isEmpty() )

        return;

    // Call logs

    if ( !d->m_isMyCard && d->m_logsFilter ) {

        if ( !d->m_logsFilter->clearEvents() ) {

            // Operation not async

            clearedCallLogs( 0 );

        }

    } else if ( d->m_logsModel ) {

        if ( !d->m_logsModel->clearList(LogsModel::TypeLogsClearAll) ) {

            // Operation not async

            clearedCallLogs( 0 );

        }

    }

    // Messages

    d->m_msgHistory->clearMessages( (int)d->m_contactId );    

}

/*!

 * Mark all the conversations in the view as seen.

 * 

 */

void CntHistoryModel::markAllAsSeen()

{

    if ( d->m_isMarkedAsSeen )

        return;

    // Call logs

    if ( !d->m_isMyCard && d->m_logsFilter ) {

        d->m_logsFilter->markEventsSeen();

    } else if ( d->m_logsModel ) {

        d->m_logsModel->markEventsSeen(LogsModel::TypeLogsClearMissed);

    }

    // Messages

    d->m_msgHistory->markRead( (int)d->m_contactId );

    d->m_isMarkedAsSeen = true;

}

/*!

 * Sort items in the model and refresh the view

 * 

 */

void CntHistoryModel::sortAndRefresh(Qt::SortOrder order)

{

    sort(0, order);

    emit layoutChanged();

}

/*!

 * Create the model structure and cache history data from

 * conversations and call logs databases.

 *

 */

void CntHistoryModel::initializeModel()

{

    initializeLogsModel();

    initializeMsgModel();

}

void CntHistoryModel::initializeMsgModel()

{

    MsgHistory* m = new MsgHistory();

    // Connect to signals emitted by msg model

    connect(m, SIGNAL(messagesReady(QList<MsgItem>& )), this, SLOT(messagesReady(QList<MsgItem>& )));

    connect(m, SIGNAL(messageAdded(MsgItem& )), this, SLOT(messageAdded(MsgItem& )));

    connect(m, SIGNAL(messageChanged(MsgItem& )), this, SLOT(messageChanged(MsgItem& )));

    connect(m, SIGNAL(messageDeleted(MsgItem& )), this, SLOT(messageDeleted(MsgItem& )));

    // Contact centric

    if( !d->m_isMyCard ) {

        // Subscribe to get new messages

        // received from this contact

        m->subscribe(d->m_contactId);

        // Initial fetch of all messages

        m->getMessages(d->m_contactId);

    }

    d->m_msgHistory = m;

}

void CntHistoryModel::initializeLogsModel()

{

    //populate model with call events

    d->m_logsModel = new LogsModel(LogsModel::LogsFullModel);

    if (!d->m_isMyCard) {

        //do the filtering to get call events for the target contact

        d->m_logsFilter = new LogsCustomFilter;

        d->m_logsFilter->setContactId(d->m_contactId);

        d->m_logsFilter->setSourceModel(d->m_logsModel);

        d->m_AbstractLogsModel = d->m_logsFilter;

        connect(d->m_logsFilter, SIGNAL(clearingCompleted(int)), 

                    this, SLOT(clearedCallLogs(int)));

        connect(d->m_logsFilter, SIGNAL(markingCompleted(int)), 

                    this, SLOT(markingCompleted(int)));

    } else {

        //get all call events

        d->m_AbstractLogsModel = d->m_logsModel;

        connect(d->m_logsModel, SIGNAL(clearingCompleted(int)), 

                    this, SLOT(clearedCallLogs(int)));

        connect(d->m_logsModel, SIGNAL(markingCompleted(int)), 

                    this, SLOT(markingCompleted(int)));

    }

    //read first call events and start listening for more 

    for ( int i = 0; i < d->m_AbstractLogsModel->rowCount(); ++i ) {

        LogsEvent* event = qVariantValue<LogsEvent*>(

                d->m_AbstractLogsModel->data(d->m_AbstractLogsModel->index(i, 0), LogsModel::RoleFullEvent) );

        if ( event ) {

            HItemPointer item = HItemPointer(new HistoryItem());

            readLogEvent(event, *item);

            d->m_logsMap.insert(i, item);

            d->m_List.append( item );

        }

    }

    connect(d->m_AbstractLogsModel, SIGNAL(rowsInserted(const QModelIndex &, int, int)), 

            this, SLOT(logsRowsInserted(const QModelIndex &, int, int)));

    connect(d->m_AbstractLogsModel, SIGNAL(rowsRemoved(const QModelIndex &, int, int)), 

            this, SLOT(logsRowsRemoved(const QModelIndex &, int, int)));

    connect(d->m_AbstractLogsModel, SIGNAL(dataChanged(const QModelIndex &, const QModelIndex &)), 

                this, SLOT(logsDataChanged(const QModelIndex &, const QModelIndex &)));

}

/*!

 * Read call event into a history item

 *

 * \param event Call log event

 * \param item Conversation history item

 */

void CntHistoryModel::readLogEvent(LogsEvent* event, HistoryItem& item)

{

    QString bodyText;

    QString icon;

    QString title;

    if ( d->m_isMyCard ) {

        if ( event->remoteParty().length() > 0 ) {

            title = event->remoteParty();

        }

        else {

            title = event->number();

        }

    } else {

        if ( event->direction() == LogsEvent::DirIn ) {

            bodyText = hbTrId("txt_phob_list_received");

            icon = QString("qtg_small_received");

        } else if ( event->direction() == LogsEvent::DirOut ) {

            bodyText = hbTrId("txt_phob_list_dialled_call");

            icon = QString("qtg_small_sent");

        } else if ( event->direction() == LogsEvent::DirMissed ) {

            bodyText = hbTrId("txt_phob_list_missed_call");

            icon = QString("qtg_small_missed_call");

            if ( !event->isRead() )

                item.seenStatus = Unseen;

        }

    }

    if ( event->direction() == LogsEvent::DirOut )

        item.direction = Outgoing;

    else

        item.direction = Incoming;

    item.message = bodyText;

    item.iconPath = icon;

    item.title = title;

    item.timeStamp = event->time();

    item.msgType = CallLog;

    item.number = event->number();

}

/*!

 * Slot used for receiving new rows from the LogsModel.

 *

 * \param parent Optional parent index value.

 * \param first The first row item to be received from the model.

 * \param last The last row item to be received from the model.

 */

void CntHistoryModel::logsRowsInserted(const QModelIndex& /*parent*/, int first, int last)

{

    int oldRowCount = rowCount();

    for ( int i = first; i < d->m_AbstractLogsModel->rowCount() && i <= last; ++i ) {

        LogsEvent* event = qVariantValue<LogsEvent*>(

                d->m_AbstractLogsModel->data(d->m_AbstractLogsModel->index(i, 0), LogsModel::RoleFullEvent) );

        if ( event ) {

            HItemPointer item(new HistoryItem());

            readLogEvent(event, *item);

            d->m_logsMap.insert(i, item);

            d->m_List.append( item );

        }

    }

    beginInsertRows(QModelIndex(), oldRowCount, rowCount());

    endInsertRows();

}

/*!

 * Slot used for receiving new rows from the LogsModel.

 *

 * \param parent Optional parent index value.

 * \param first The first row item to be received from the model.

 * \param last The last row item to be received from the model.

 */

void CntHistoryModel::logsRowsRemoved(const QModelIndex& /*parent*/, int first, int last)

{

    QList< int > indices;

    for ( int i = first; i <= last; ++i ) {

        HItemPointer item = d->m_logsMap.value( i );

        int index = d->m_List.indexOf( item );

        d->m_List.removeOne( item );

        d->m_logsMap.remove( i );        

        indices.append( index );

    }

    // Remove list items in batches

    if ( !indices.isEmpty() ) {

        QList< QList<int> > batches = findIndices(indices);

        foreach( QList<int> l, batches ) {

            beginRemoveRows(QModelIndex(), l.first(), l.last());

            endRemoveRows();

        }

    }

}

/*!

 * Update events from logs model. Events are

 * received as a batch

 *

 * \param first First updated model index

 * \param last Last updated model index

 */

void CntHistoryModel::logsDataChanged(const QModelIndex& first, const QModelIndex& last)

{

    int f = first.row();

    int l = last.row();

    QList< int > indices;

    for ( int i = f; i < d->m_AbstractLogsModel->rowCount() && i <= l; ++i ) {

        LogsEvent* event = qVariantValue<LogsEvent*>(

                d->m_AbstractLogsModel->data(d->m_AbstractLogsModel->index(i, 0), LogsModel::RoleFullEvent) );

        // Fetch item from the mapped logs model items

        HItemPointer item = d->m_logsMap.value( i );

        // Found item in the logs map

        if ( !item.isNull() ) {

            int index = d->m_List.indexOf( item );

            readLogEvent( event, *item );

            indices.append( index );

        }

    }

    // Emit dataChanged signal only if there were updates

    if ( !indices.isEmpty() ) {

        QList< QList<int> > batches = findIndices( indices );

        foreach( QList<int> l, batches )

            emit dataChanged( index(l.first(), 0), index(l.last(), 0) );

    }

}

/*!

 * Clear logs event slot received from logs model

 *

 * \param err Error of the clear logs request

 */

void CntHistoryModel::clearedCallLogs(int err)

{

    if ( err != 0 ) {

        return;

    }

    QList< int > indices;

    foreach( HItemPointer p, d->m_logsMap.values() ) {

        d->m_List.removeOne( p );

    }

    d->m_logsMap.clear();

    // Remove list items in batches

    if ( !indices.isEmpty() ) {

        QList< QList<int> > batches = findIndices(indices);

        foreach( QList<int> l, batches ) {

            beginRemoveRows( QModelIndex(), l.first(), l.last() );

            endRemoveRows();

        }

    }

}

/*!

 * Mark events as seen slot received from logs model

 *

 * \param err Error of the marking logs request

 */

void CntHistoryModel::markingCompleted(int err)

{

    if ( err == 0 ) {

        d->m_isMarkedAsSeen = true;

    }

}

/*!

 * Check whether an idex is out of bound of our list

 *

 * \param index Index to be validated

 */

bool CntHistoryModel::validateRowIndex( const int index) const

{

    return( index < rowCount() && index >= 0 );

}

/*!

 * Find the sequences of indices for the given indices from the private list

 * 

 * \param indices List of indices

 * \return sequences of indices

 */

QList< QList<int> > CntHistoryModel::findIndices( const QList< int >& indices )

{

    QList< QList<int> > sequences;

    QList<int> currSequence;

    int prevIndex = indices.at(0) - 1;

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

    {

        int currIndex = indices.at(i);

        if (currIndex >= 0)

        {

            if ( prevIndex+1 != currIndex && !currSequence.isEmpty() )

            {

                sequences.append( currSequence );

                currSequence.clear();

            } 

            currSequence.append( currIndex );

            prevIndex = currIndex;

        }

    }

    if (!currSequence.isEmpty())

    {

        // Add last sequence if such exist

        sequences.append( currSequence );

    }

    return sequences;

}

/*!

 * Read message event into a history item

 *

 * \param event Message event

 * \param item Conversation history item

 */