#ifndef GTL_GUI_SPEC_MEAS_DELEGATE_H
#define GTL_GUI_SPEC_MEAS_DELEGATE_H

#include <QStyledItemDelegate>
#include <QWidget>
#include <QComboBox>
#include <QLabel>
#include <QDoubleSpinBox>
#include <QHBoxLayout>
#include <QMetaEnum>

#include "gui_global.h"
#include "math/gtl_math_spec_meas.h"

namespace gtl {
    namespace gui {

        class GTL_GUI_EXPORT spec_meas_chan_widget : public QWidget
        {
            Q_OBJECT
        public:
            spec_meas_chan_widget(QWidget *parent=nullptr, QAbstractItemModel *model = nullptr) :
                QWidget(parent),
                comboBox(new QComboBox)
            {
                if(model)
                {
                    QHBoxLayout *layout = new QHBoxLayout(this);
                    comboBox->setModel(model);
                    comboBox->setContentsMargins(0,0,0,0);
                    layout->setContentsMargins(0,0,0,0);
                    layout->addWidget(comboBox);

                    connect(comboBox, &QComboBox::currentIndexChanged, [=]{emit chan_changed();});
                }
            }

            QString currentText()
            {
                return comboBox->currentText();
            }

            int currentIdx()
            {
                int idx = comboBox->currentIndex();
                return idx;
            }

            void setCurrentIndex(QString name)
            {
                int idx = comboBox->findText(name);
                if(idx != comboBox->currentIndex())
                {
                    if(idx >= 0 && idx < comboBox->count())
                        comboBox->setCurrentIndex(idx);
                    emit chan_changed();
                }
            }

            void setCurrentIndex(int idx)
            {
                if(idx != comboBox->currentIndex())
                {
                    if(idx >= 0 && idx < comboBox->count())
                        comboBox->setCurrentIndex(idx);
                    emit chan_changed();
                }
            }

        signals:
            void chan_changed();

        private:
            QComboBox *comboBox;
        };

        class GTL_GUI_EXPORT spec_meas_param_widget : public QWidget
        {
            Q_OBJECT
        public:
            spec_meas_param_widget(QWidget *parent=nullptr) :
                QWidget(parent)
            {
                comboBox = new QComboBox;
                QMetaEnum meta_enum = QMetaEnum::fromType<gtl::math::spec_meas::types>();
                for(int i = 0; i < meta_enum.keyCount(); i++)
                    comboBox->addItem(meta_enum.valueToKey(i));
                comboBox->setContentsMargins(0,0,0,0);
                QHBoxLayout *layout = new QHBoxLayout(this);
                layout->setContentsMargins(0,0,0,0);
                layout->addWidget(comboBox);

                connect(comboBox, &QComboBox::currentIndexChanged, [=]{emit param_changed();});
            }

            int currentIndex()
            {
                return comboBox->currentIndex();
            }

            void setCurrentIndex(int index)
            {
                comboBox->setCurrentIndex(index);
                return;
            }

        private:
            QComboBox *comboBox;

        signals:
            void param_changed();
        };

        class GTL_GUI_EXPORT spec_meas_delegate : public QStyledItemDelegate
        {
            Q_OBJECT

        public:
            explicit spec_meas_delegate(QObject *parent = nullptr, QAbstractItemModel *channels = nullptr);

            QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;
            void setEditorData(QWidget *editor, const QModelIndex &index) const;
            void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const;

            void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index) const;
            void paint(QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index) const;
            QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const;


        private:
            QAbstractItemModel *_channels = nullptr;
        };

    } // namespace gui
} // namespace gtl

#endif // GTL_GUI_SPEC_MEAS_DELEGATE_H