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#include "cntfilterunion.h"
#include "cntfilterdetail.h"
#include "cntfilterdefault.h"
#include "cntfilterrelationship.h"
#include "cntfilterintersection.h"
#include "cnttransformcontact.h"

CntFilterUnion::CntFilterUnion(CContactDatabase& contactDatabase,CntSymbianSrvConnection &cntServer,CntDbInfo& dbInfo) : 
                    m_contactdatabase(contactDatabase),
                    m_srvConnection(cntServer),
                    m_dbInfo(dbInfo)
{
}

CntFilterUnion::~CntFilterUnion()
{
}


QList<QContactLocalId> CntFilterUnion::contacts(const QContactFilter &filter,
                                                const QList<QContactSortOrder> &sortOrders,
                                                bool &filterSupportedflag,
                                                QContactManager::Error* error)
{
    Q_UNUSED(sortOrders);
    Q_UNUSED(filterSupportedflag);
    //Check if any invalid filter is passed 
    if (!filterSupported(filter)) {
        *error = QContactManager::NotSupportedError;
        return QList<QContactLocalId>();
    }
    QList<QContactLocalId> idList;
    QString sqlQuery;
    createSelectQuery(filter,sqlQuery,error);
    QString sortQuery = m_dbInfo.getSortQuery(sortOrders, sqlQuery, error);
    //fetch the contacts
    if (*error == QContactManager::NoError) {
     idList =  m_srvConnection.searchContacts(sortQuery, error);
    }
    return idList;
}


bool CntFilterUnion::filterSupported(const QContactFilter& filter) 
{
    bool result = false;
    if (QContactFilter::UnionFilter == filter.type()) {
     result = true;
    }
    return result;
}



void CntFilterUnion::createSelectQuery(const QContactFilter& filter,
                                       QString& selectquery,
                                       QContactManager::Error* error)

{
    const QContactUnionFilter& unionfilter = static_cast<const QContactUnionFilter&>(filter);
    if (!filterSupported(filter)) {
        *error = QContactManager::NotSupportedError;
        return;
    }
    QList<QContactFilter> individualFilters = unionfilter.filters();
    //QString selectquery;
    int fltrcnt =  individualFilters.count();          
    if (fltrcnt)
        getSelectQueryforFilter(individualFilters[0],selectquery,error);
    
    for (int i=1; i< fltrcnt ; i++) {
        QString query;
        getSelectQueryforFilter(individualFilters[i],query,error);
        if (*error == QContactManager::NoError ) {
            selectquery.append(" UNION ");
            selectquery += query;
        }
    }
}

void CntFilterUnion::getSelectQueryforFilter(const QContactFilter& filter,
                                             QString& sqlSelectQuery,
                                             QContactManager::Error* error)
{
    switch (filter.type()) {
        case QContactFilter::DefaultFilter: {
            CntFilterDefault defaultfltr(m_contactdatabase,m_srvConnection,m_dbInfo);
            defaultfltr.createSelectQuery(filter,sqlSelectQuery,error);
            break;
        }
        case QContactFilter::ContactDetailFilter: {
            QContactDetailFilter detailfilter(filter);
            if (detailfilter.detailDefinitionName() == QContactPhoneNumber::DefinitionName ) {
                CntFilterDetail dtlfltr(m_contactdatabase,m_srvConnection,m_dbInfo);
                dtlfltr.createMatchPhoneNumberQuery(filter,sqlSelectQuery,error);
            }
            else {
                CntFilterDetail dtlfltr(m_contactdatabase,m_srvConnection,m_dbInfo);
                dtlfltr.createSelectQuery(filter,sqlSelectQuery,error);
            }
            break;
        }
        case QContactFilter::RelationshipFilter: {
            CntFilterRelationship relationfltr(m_contactdatabase,m_srvConnection,m_dbInfo);
            relationfltr.createSelectQuery(filter,sqlSelectQuery,error);
            break;
        }
        case QContactFilter::IntersectionFilter: {
            sqlSelectQuery += "SELECT DISTINCT contact_id FROM (";
            CntFilterIntersection intersectionfltr(m_contactdatabase,m_srvConnection,m_dbInfo);
            intersectionfltr.createSelectQuery(filter,sqlSelectQuery,error);
            sqlSelectQuery += ')';
            break;
        }
        case QContactFilter::UnionFilter: {
            sqlSelectQuery += "SELECT DISTINCT contact_id FROM (";
            CntFilterUnion unionfltr(m_contactdatabase,m_srvConnection,m_dbInfo);
            unionfltr.createSelectQuery(filter,sqlSelectQuery,error);
            sqlSelectQuery += ')';
            break;
        }
        default: {
            *error = QContactManager::NotSupportedError;
            break;
        }
    }
}