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

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

}

CntFilterIntersection::~CntFilterIntersection()
{
    
}


QList<QContactLocalId> CntFilterIntersection::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) == false)
        {
        *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 CntFilterIntersection::filterSupported(const QContactFilter& filter) 
{
    bool result = false;
       if(QContactFilter::IntersectionFilter == filter.type())
           {
           result = true;
           }
    
       return result;
}

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

{
    const QContactIntersectionFilter& intersectionfilter = static_cast<const QContactIntersectionFilter&>(filter);
    if(!filterSupported(filter))
        {
        *error = QContactManager::NotSupportedError;
        return;
        }
        QList<QContactFilter> individualFilters = intersectionfilter.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(" INTERSECT ");
                selectquery += query;
                }
            
            }
        
            
}

void CntFilterIntersection::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 ) 
                    {
                    *error=QContactManager::NotSupportedError;
                    }
                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;
                }
            }
    }