#ifndef AUTOFORM_H
#define AUTOFORM_H

#include <QWidget>
#include <QList>
#include <QLineEdit>
#include <QSharedPointer>
#include <QMetaMethod>
#include <QDebug>

#include "service.h"
#include "ivalidator.h"

template <class T>
class AutoForm : public QWidget
{
public:
    explicit AutoForm(QWidget *parent = 0) : QWidget(parent) {
        m_newRec = false;
    }

    virtual ~AutoForm() {
        foreach (IValidator *val, m_validators) {
            delete val;
            m_validators.clear();
        }
    }

    void setEntity(QSharedPointer<T> entity) {
        m_entity = entity;
        bindToUi();
    }

    void registerBinding(QWidget *widget) {
        if (!m_bindWidgets.contains(widget)) {
            m_bindWidgets.append(widget);
        }
    }

    void registerValidator(IValidator *validator) {
        m_validators.append(validator);
    }

private:
    QSharedPointer<T> m_entity;
    QList<QWidget*> m_bindWidgets;
    QList<IValidator*> m_validators;
    bool m_newRec;

    void bindToUi() {
        foreach (QWidget *widget, m_bindWidgets) {
            const char* prop = widget->metaObject()->userProperty().name();
            widget->setProperty(prop, ((QObject*)m_entity.data())->property(widget->objectName().toStdString().c_str()));
        }
    }

    bool bindToData() {
        foreach (IValidator *val, m_validators) {
            if (!val->validate()) {
                emit validationError(val->errMessage());
                return false;
            }
        }

        foreach (QWidget *widget, m_bindWidgets) {
            const char* prop = widget->metaObject()->userProperty().name();
            ((QObject*)m_entity.data())->setProperty(widget->objectName().toStdString().c_str(), widget->property(prop));
        }

        return true;
    }

signals:
    void recordAdded(QSharedPointer<T> entity);
    void recordUpdated(QSharedPointer<T> entity);
    void validationError(QString errMessage);

public slots:
    bool saveRecord() {
        if (!bindToData())
        {
            return false;
        }

        Service<T> service;
        service.save(m_entity);

        if (m_newRec) {
            emit recordAdded(m_entity);
        } else {
            emit recordUpdated(m_entity);
        }

        return true;
    }
};

#endif // AUTOFORM_H