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#include "phrasemodel.h"

QT_BEGIN_NAMESPACE

void PhraseModel::removePhrases()
{
    int r = plist.count();
    if (r > 0) {
        plist.clear();
        reset();
    }
}

Phrase *PhraseModel::phrase(const QModelIndex &index) const
{
    return plist.at(index.row());
}

void PhraseModel::setPhrase(const QModelIndex &indx, Phrase *ph)
{
    int r = indx.row();

    plist[r] = ph;

    // update item in view
    const QModelIndex &si = index(r, 0);
    const QModelIndex &ei = index(r, 2);
    emit dataChanged(si, ei);
}

QModelIndex PhraseModel::addPhrase(Phrase *p)
{
    int r = plist.count();

    plist.append(p);

    // update phrases as we add them
    beginInsertRows(QModelIndex(), r, r);
    QModelIndex i = index(r, 0);
    endInsertRows();
    return i;
}

void PhraseModel::removePhrase(const QModelIndex &index)
{
    int r = index.row();
    beginRemoveRows(QModelIndex(), r, r);
    plist.removeAt(r);
    endRemoveRows();
}

QModelIndex PhraseModel::index(Phrase * const phr) const
{
    int row;
    if ((row = plist.indexOf(phr)) == -1)
        return QModelIndex();

    return index(row, 0);
}

int PhraseModel::rowCount(const QModelIndex &) const
{
    return plist.count();
}

int PhraseModel::columnCount(const QModelIndex &) const
{
    return 3;
}

QVariant PhraseModel::headerData(int section, Qt::Orientation orientation, int role) const
{
    if ((role == Qt::DisplayRole) && (orientation == Qt::Horizontal)) {
        switch(section) {
        case 0:
            return tr("Source phrase");
        case 1:
            return tr("Translation");
        case 2:
            return tr("Definition");
        }
    }

    return QVariant();
}

Qt::ItemFlags PhraseModel::flags(const QModelIndex &index) const
{
    if (!index.isValid())
        return 0;
    Qt::ItemFlags flags = Qt::ItemIsSelectable | Qt::ItemIsEnabled;
    // Edit is allowed for source & translation if item is from phrasebook
    if (plist.at(index.row())->phraseBook()
        && (index.column() != 2))
        flags |= Qt::ItemIsEditable;
    return flags;
}

bool PhraseModel::setData(const QModelIndex & index, const QVariant & value, int role)
{
    int row = index.row();
    int column = index.column();

    if (!index.isValid() || row >= plist.count() || role != Qt::EditRole)
        return false;

    Phrase *phrase = plist.at(row);

    switch (column) {
    case 0:
        phrase->setSource(value.toString());
        break;
    case 1:
        phrase->setTarget(value.toString());
        break;
    case 2:
        phrase->setDefinition(value.toString());
        break;
    default:
        return false;
    }

    emit dataChanged(index, index);
    return true;
}

QVariant PhraseModel::data(const QModelIndex &index, int role) const
{
    int row = index.row();
    int column = index.column();

    if (row >= plist.count() || !index.isValid())
        return QVariant();

    Phrase *phrase = plist.at(row);

    if (role == Qt::DisplayRole || (role == Qt::ToolTipRole && column != 2)) {
        switch (column) {
        case 0: // source phrase
            return phrase->source().simplified();
        case 1: // translation
            return phrase->target().simplified();
        case 2: // definition
            return phrase->definition();
        }
    }
    else if (role == Qt::EditRole && column != 2) {
        switch (column) {
        case 0: // source phrase
            return phrase->source();
        case 1: // translation
            return phrase->target();
        }
    }

    return QVariant();
}

QT_END_NAMESPACE