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#include "cntdisplaylabel.h"
#include <qtcontacts.h>
#include <centralrepository.h>
#include <cntcenrepkeys.h>

const TUint32 KOrderLastFirst = 0x00000000;
const TUint32 KOrderLastCommaFirst = 0x00000001;
const TUint32 KOrderFirstLast = 0x00000002;

/*! 
 * Constructor
 */

CntDisplayLabel::CntDisplayLabel() :
    m_nameOrder(KOrderFirstLast)
{
#ifdef SYMBIAN_BACKEND_USE_SQLITE
    CRepository* cenrep;
    TRAPD(err, cenrep = CRepository::NewL(KCRUiContacts));
    if (err == KErrNone) {
        TInt value(-1);
        if (cenrep->Get(KNameOrdering, value) == KErrNone) {
            m_nameOrder = static_cast<int>(value);
        }
    }
#endif
    setDisplayLabelDetails();
}

/*! 
 * Destructor
 */
CntDisplayLabel::~CntDisplayLabel()
{
}

/*! 
 * Sets the fields that should be used for displaylabel
 * 
 * The order is defined in the QList of preferred options
 * Whereas the QPair includes the fields that should be used for 
 * the specific detail
 */
void CntDisplayLabel::setDisplayLabelDetails()
{
    //This will be variated in the future
    //adds the contact's details definition names + fields to be used for display name and filtering display label

    //Display label details
    //Contact
    //Preferred details
    QList<QPair<QLatin1String, QLatin1String> > contactPrefferedDisplayLabelDetails;
    QLatin1String firstLatin(QContactName::FieldFirstName);
    QLatin1String secondLatin(QContactName::FieldLastName);
    
    if (m_nameOrder == KOrderLastFirst || m_nameOrder == KOrderLastCommaFirst) {
        firstLatin = QLatin1String(QContactName::FieldLastName);
        secondLatin = QLatin1String(QContactName::FieldFirstName);
    }

    contactPrefferedDisplayLabelDetails.append(qMakePair(QLatin1String(QContactName::DefinitionName), firstLatin));
    contactPrefferedDisplayLabelDetails.append(qMakePair(QLatin1String(QContactName::DefinitionName), secondLatin));
    m_contactDisplayLabelDetails.append(contactPrefferedDisplayLabelDetails);

    //if preferred details doesn't exist use these
    QList<QPair<QLatin1String, QLatin1String> > contactSecondaryDisplayLabelDetails;
    contactSecondaryDisplayLabelDetails.append(qMakePair(QLatin1String(QContactOrganization::DefinitionName), QLatin1String(QContactOrganization::FieldName)));
    m_contactDisplayLabelDetails.append(contactSecondaryDisplayLabelDetails);
    
    //Group
    QList<QPair<QLatin1String, QLatin1String> > preferredGroupDisplayLabelDetails;
    preferredGroupDisplayLabelDetails.append(qMakePair(QLatin1String(QContactName::DefinitionName), QLatin1String(QContactName::FieldCustomLabel)));
    m_groupDisplayLabelDetails.append(preferredGroupDisplayLabelDetails);
}

/*! 
 * Returns a synthesised display label of a contact
 * \a contact to read the data from .
 * \a error On return, contains the possible error.
 * \return synthesised display label 
 */
QString CntDisplayLabel::synthesizedDisplayLabel(const QContact& contact, QContactManager::Error* error) const
{
    QString displayLabel;
    *error = QContactManager::NoError;
    
    //contact
    if(contact.type() == QContactType::TypeContact) {
        displayLabel = generateDisplayLabel(contact, m_contactDisplayLabelDetails);    
    }
    
    //group
    else if (contact.type() == QContactType::TypeGroup) {
        displayLabel = generateDisplayLabel(contact, m_groupDisplayLabelDetails);
    } 
    
    //invalid type
    else {
        *error = QContactManager::InvalidContactTypeError;
    }
    
    return displayLabel;
}

/*! 
 * Generate the display label
 * \a contact to read the data from .
 * \a detailList contains the details to be read from the contact
 * \return synthesised display label 
 */
QString CntDisplayLabel::generateDisplayLabel( const QContact &contact, const QList<QList<QPair<QLatin1String, QLatin1String> > > detailList) const
{
    QString displayLabel("");
    
    //loop through the details and create display label
    for(int i = 0; i < detailList.count() && displayLabel.isEmpty(); i++ )
    {
        QList<QPair<QLatin1String, QLatin1String> > detailPairList = detailList.at(i);
        QContactDetail contactDetail;
        
        for(int j = 0; j < detailPairList.count(); j++)
        {
            contactDetail = contact.detail(detailPairList.at(j).first);
                    
            if(displayLabel.isEmpty()){ //read the value and set it as display label
                displayLabel =  contactDetail.value(detailPairList.at(j).second);
            }
            else{ //read the value and append it to the display label
                QString label = contactDetail.value(detailPairList.at(j).second);
                
                if(!label.isEmpty())
                {
                    // Inlcude a comma if needed in the display label
                    if (m_nameOrder == KOrderLastCommaFirst)
                        displayLabel.append(comma());
                    displayLabel.append(delimiter());                        
                    displayLabel.append(label);
                }
            }
        }
    }

    //no display label, set default value
    if(displayLabel.isEmpty())
    {
        //should the unnamned be read from somewhere?
        displayLabel = unNamned();
    }
    
    return displayLabel;
}

/*! 
 * delemiter to be used in display label
 * \return delemiter 
 */
QString CntDisplayLabel::delimiter() const
{
    //this will be variated in the future.
    return " ";
}

/*!
 * return the name used for unknown contacts
 */
QString CntDisplayLabel::unNamned() const
{
    return "Unnamed";
}

/*!
 * Returns the details to be used for contact filtering
 */
QList<QPair<QLatin1String, QLatin1String> > CntDisplayLabel::contactFilterDetails() const
{
    return m_contactDisplayLabelDetails.at(0);
}

/*!
 * Returns the details to be used for group filtering
 */
QList<QPair<QLatin1String, QLatin1String> > CntDisplayLabel::groupFilterDetails() const
{
    return m_groupDisplayLabelDetails.at(0);
}

/*! 
 * Comma to be used in display label
 * \return comma
 */
QString CntDisplayLabel::comma() const
{
    return ",";
}