#ifndef UNSAVEDDOCUMENTSDIALOG_H
#define UNSAVEDDOCUMENTSDIALOG_H

#include "SqlDocument.h"
#include <QDialog>
#include <QList>
#include <functional>
#include <memory>

class QListWidget;

/** Lists modified documents with a checkbox per document. The user picks
 * whether the checked documents should be saved or discarded.
 */
class UnsavedDocumentsDialog : public QDialog {
	Q_OBJECT
public:
	enum class Choice {
		Cancel,
		Save,
		Discard
	};

	UnsavedDocumentsDialog(const QList<std::shared_ptr<SqlDocument>> &docs, QWidget *parent = nullptr);

	Choice choice() const { return m_choice; }
	QList<std::shared_ptr<SqlDocument>> checkedDocuments() const;
	QList<std::shared_ptr<SqlDocument>> uncheckedDocuments() const;

private:
	QList<std::shared_ptr<SqlDocument>> m_docs;
	QListWidget *m_list;
	Choice m_choice = Choice::Cancel;
};

/** Selects the documents that are closed when every editor for which
 * isClosing returns true is closed. Only modified documents are returned.
 */
QList<std::shared_ptr<SqlDocument>> documentsClosedWith(const QList<std::shared_ptr<SqlDocument>> &docs,
	const std::function<bool(const QWidget*)> &isClosing);

/** Asks the user what to do with the modified documents. Returns true when
 * the close may continue, i.e. nothing was cancelled, no save failed and
 * every listed document was checked.
 */
bool confirmClose(QWidget *parent, const QList<std::shared_ptr<SqlDocument>> &docs);

#endif // UNSAVEDDOCUMENTSDIALOG_H