#ifndef SQL_RECORD_WIDGET_H
#define SQL_RECORD_WIDGET_H

#include <QWidget>
#include <QSqlQuery>
#include <QSqlField>
#include <QVariant>
#include <QMap>
#include <QSet>

class SQLRecordWidget: public QWidget {
	Q_OBJECT
public:
	SQLRecordWidget(QWidget * parent = 0);
	~SQLRecordWidget();
	
	void setRecord(const QSqlRecord & q, bool full_update = false);
	void setReadOnly(bool yes) {ro = yes; updateWidgets();}
	void setFixedValue(const QString & name, const QVariant & value);
	void setTypeForName(const QString & name, const QString & type) {ftypes[name] = type;}
	void clearValues();
	void removeWidgets() {qDeleteAll(cws); cws.clear();}
	
	void hideColumn(const QString & col) {hidden << col;}
	void showColumn(const QString & col) {hidden.remove(col);}
	void showColumns() {hidden.clear();}
	void addRelation(const QString & this_column, const QString & other_table, const QString & other_key, const QString & other_column) {relations_src << RelationSrc(this_column, other_table, other_key, other_column); updateRelations();}
	void removeRelations() {relations_src.clear(); updateRelations();}
	void addTranslation(const QString & file);
	void setConnectionName(const QString &conn_name) {connection_name = conn_name;}
	QString connectionName() const {return connection_name;}

	QString getValuesQuery() const;
	QString getUpdateQuery() const;
	bool isEmpty() const;
	QWidget * valueWidget(const QString & name) const {foreach (QWidget * w, cws) if (w->objectName() == name) return w; return 0;}
	
	void updateRelations();
	
protected:
	QPair<QString, QString> trColumn(const QString & n) {QPair<QString, QString> trn = translates.value(n); if (trn.first.isEmpty()) return QPair<QString, QString>(n, ""); return trn;}
	void createWidgets(const QSqlRecord & q);
	void updateWidgets();
	QVariant::Type fieldType(const QSqlField & f);
	
	struct RelationSrc {
		RelationSrc(const QString & v0 = QString(), const QString & v1 = QString(), const QString & v2 = QString(), const QString & v3 = QString()):
			tcol(v0),
			table(v1),
			key(v2),
			ocol(v3)
		{}
		QString tcol;
		QString table;
		QString key;
		QString ocol;
	};
	
	QMap<QString, QPair<QString, QString> > translates;
	QVector<RelationSrc> relations_src;
	QMap<QString, QList<QPair<int, QString> > > relations;
	QMap<QString, QString> ftypes;
	QSet<QString> hidden;
	QWidgetList cws;
	bool ro;
	QString connection_name;

signals:
	void updateRequest();
	void widgetsCreated();
	
};

#endif // SQL_RECORD_WIDGET_H