#include "metadialog.h"
#include "configtypes.h"

metadialog::metadialog(QWidget *parent)
    : QDialog(parent)
{
    thisdialoglayout=NULL;
    thismetalist=NULL;
}

metadialog::~metadialog() {
    //TODO - deallocate everything here? does the ok/reject deallocate the graphical elements automatically?
    if(thismetalist) {
        foreach(metadata_t m, *thismetalist) {
            if(m.entry) {
                delete m.entry;
                m.entry=NULL;
            }
        }
    }
}


//brings up the dialog, is non blocking, return code needs to be handled: negative is internal error, zero "ok", one "cancelled"
//textedited signals are used to automatically populate the
qint8 metadialog::rundialog(QList<metadata_t>* meta) {
    quint8 h=0;
    if(thisdialoglayout)
        delete thisdialoglayout;
    thisdialoglayout = new QVBoxLayout();
    thismetalist=meta;
    foreach(metadata_t m, *meta) {//loop through
        QGroupBox *groupBox;
        QLineEdit *l;
        QHBoxLayout *lay;
        if(m.type!=META_INVALID) {
            groupBox = new QGroupBox(m.title);//create and title the group box
            if(m.type<META_CHECK) {//we will need a lineedit
                l = new QLineEdit();
                lay = new QHBoxLayout();
                lay->addWidget(l);
                lay->addStretch(1);
                groupBox->setLayout(lay);
            }
        }
        switch(m.type) {
            case META_INVALID:
                return -1;//error code
            break;
            case META_TEXT:
                l->setInputMask("AAAAAAAAAAAAAAAAAAA");//check if this works with fewer characters
            break;
            case META_INT:
                l->setValidator(new QIntValidator(l));
                l->setMaxLength(20);
            break;
            case META_FLOAT:
                l->setValidator(new QDoubleValidator(-99999.0,99999.0, 2, l));//TODO - add option to set limits here from config file?
                l->setMaxLength(20);
            break;
            case META_FREE:
                l->setMaxLength(20);//its always limited to number of characters
            break;
            case META_CHECK:
                lay = new QHBoxLayout();
                for(quint8 n=0;n<m.checkboxes.length();n++) {
                    QRadioButton *r=new QRadioButton(m.checkboxes[n]);
                    lay->addWidget(r);
                    connect(r, &QRadioButton::toggled, [=](bool checked){checkhandler(n,&((*meta)[h]));});
                }
                lay->addStretch(1);
                groupBox->setLayout(lay);
            break;
            default:
                return -2;//unsupported error code
        }
        if(m.type<META_CHECK)
            connect(l, &QLineEdit::textEdited, [=](const QString txt){lineedithandler(txt,l,&((*meta)[h]));});
        h++;//index into the metadata input list
        if(thisdialoglayout)
            thisdialoglayout->addWidget(groupBox);
    }
    //"ok" and "cancel" buttons go here
    QDialogButtonBox *b=new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel);
    connect(b, SIGNAL(accepted()), this, SLOT(accept()));
    connect(b, SIGNAL(rejected()), this, SLOT(reject()));
    if(thisdialoglayout) {
        thisdialoglayout->addWidget(b);
        setLayout(thisdialoglayout);
        setWindowTitle(tr("Please enter details:"));
    }
    this->show();
    return 0;
}

//this is a slot used for all the lineedit inputs (first 4) attached to textEdited signal
void metadialog::lineedithandler(QString txt, QLineEdit *l, metadata_t* m) {
    if(l->hasAcceptableInput()) {//only if we meet the input rule
        if(m->entry)//wipe any previously allocated entry string
            delete m->entry;
        m->entry=new QString(txt);
    }
    else if(m->entry)//try to restore the previous value as it must have met the validator
        l->setText(*(m->entry));
}

//this is slot used for the checkbuttons (last type), attached to toggled signal
void metadialog::checkhandler(int button, metadata_t* m) {
    if(button<m->checkboxes.length()) {//this is a sanity check
        if(m->entry)//wipe any previously allocated entry string
            delete m->entry;
        m->entry=new QString(m->checkboxes[button]);
    }
}