#ifndef RECORDPANEL_H
#define RECORDPANEL_H

#include <QScrollArea>
#include <QPersistentModelIndex>
#include <vector>

class QAbstractItemModel;
class QEvent;
class QToolButton;

/** Shows the values of one row of a model as a scrollable list, one line per column.
 *  Values are edited through the model so the pending change logic of the model is reused.
 */
class RecordPanel : public QScrollArea {
	Q_OBJECT
public:
	explicit RecordPanel(QWidget *parent = nullptr);

	/// Sets the model to show, the columns from firstDataColumn on are shown
	void setModel(QAbstractItemModel *model);
	/// Columns before this one are skipped, e.g. the row number column of the CRUD model
	void setFirstDataColumn(int column);
	/// Shows the values of the given row of the model, -1 shows nothing
	void setCurrentRow(int row);

protected:
	bool eventFilter(QObject *watched, QEvent *event) override;

private slots:
	void refresh();
	void onModelReset();

private:
	struct FieldRow {
		int column = -1;
		QString original; ///< Text the editor shows, only a different text is written back
		QWidget *editor = nullptr;
		QToolButton *expandButton = nullptr;
	};

	void clearFields();
	void rebuild();
	void showValue(FieldRow &field, const QString &text, bool editable);
	void commitEditor(QWidget *editor);
	FieldRow *findField(QWidget *editor);

	QAbstractItemModel *m_model = nullptr;
	int m_firstDataColumn = 0;
	QPersistentModelIndex m_rowIndex;
	std::vector<FieldRow> m_fields;
	bool m_updating = false;
};

#endif // RECORDPANEL_H