/***************************************************************************
                          qgsdlgvectorlayerproperties.h
                   Unified property dialog for vector layers
                             -------------------
    begin                : 2004-01-28
    copyright            : (C) 2004 by Gary E.Sherman
    email                : sherman at mrcc.com
***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSVECTORLAYERPROPERTIES
#define QGSVECTORLAYERPROPERTIES

#include "qgsoptionsdialogbase.h"
#include "ui_qgsvectorlayerpropertiesbase.h"
#include "qgisgui.h"
#include "qgshelp.h"
#include "qgsmaplayerstylemanager.h"
#include "qgsvectorlayer.h"
#include "layertree/qgslayertreemodel.h"
#include "layertree/qgslayertreegroup.h"
#include "qgis_app.h"

class QgsMapLayer;

class QgsAttributeActionDialog;
class QgsApplyDialog;
class QgsVectorLayer;
class QgsLabelingWidget;
class QgsDiagramProperties;
class QgsFieldsProperties;
class QgsRendererPropertiesDialog;
class QgsMapLayerConfigWidgetFactory;
class QgsMapLayerConfigWidget;
class QgsPanelWidget;

class APP_EXPORT QgsVectorLayerProperties : public QgsOptionsDialogBase, private Ui::QgsVectorLayerPropertiesBase, private QgsExpressionContextGenerator
{
    Q_OBJECT

  public:
    enum StyleType
    {
      QML = 0,
      SLD,
      DB,
    };

    QgsVectorLayerProperties( QgsVectorLayer *lyr = nullptr, QWidget *parent = nullptr, Qt::WindowFlags fl = QgisGui::ModalDialogFlags );
    ~QgsVectorLayerProperties();
    //! Returns the display name entered in the dialog
    QString displayName();
    void setRendererDirty( bool ) {}

    /** Adds an attribute to the table (but does not commit it yet)
    \param field the field to add
    \returns false in case of a name conflict, true in case of success */
    bool addAttribute( const QgsField &field );

    /** Deletes an attribute (but does not commit it)
      \param name attribute name
      \returns false in case of a non-existing attribute.*/
    bool deleteAttribute( int attr );

    //! Adds a properties page factory to the vector layer properties dialog.
    void addPropertiesPageFactory( QgsMapLayerConfigWidgetFactory *factory );

  public slots:

    void insertFieldOrExpression();

    //! Reset to original (vector layer) values
    void syncToLayer();

    //! Get metadata about the layer in nice formatted html
    QString htmlMetadata();

    //! Slot to update layer display name as original is edited
    void on_mLayerOrigNameLineEdit_textEdited( const QString &text );

    //! Called when apply button is pressed or dialog is accepted
    void apply();

    //! Called when cancel button is pressed
    void onCancel();

    //
    //methods reimplemented from qt designer base class
    //

    void on_pbnQueryBuilder_clicked();
    void on_pbnIndex_clicked();
    void on_mCrsSelector_crsChanged( const QgsCoordinateReferenceSystem &crs );
    void loadDefaultStyle_clicked();
    void saveDefaultStyle_clicked();
    void loadStyle_clicked();
    void saveStyleAs_clicked();
    void mOptionsStackedWidget_CurrentChanged( int indx );
    void on_buttonBox_helpRequested() { QgsHelp::openHelp( QStringLiteral( "working_with_vector/vector_properties.html" ) ); }
    void on_pbnUpdateExtents_clicked();

    void on_mButtonAddJoin_clicked();
    void on_mButtonEditJoin_clicked();
    void on_mJoinTreeWidget_itemDoubleClicked( QTreeWidgetItem *item, int column );
    void on_mButtonRemoveJoin_clicked();

    void on_mSimplifyDrawingGroupBox_toggled( bool checked );

  signals:

    //! Emitted when changes to layer were saved to update legend
    void refreshLegend( const QString &layerID, bool expandItem );
    void refreshLegend( const QString &layerID );

    void toggleEditing( QgsMapLayer * );

  private slots:
    //! Toggle editing of layer
    void toggleEditing();

    //! Save the style based on selected format from the menu
    void saveStyleAsMenuTriggered( QAction * );

    //! Called when is possible to choice if load the style from filesystem or from db
    void loadStyleMenuTriggered( QAction * );

    void aboutToShowStyleMenu();

    /** Updates the variable editor to reflect layer changes
     */
    void updateVariableEditor();

    /**
     * \brief updates the FieldsPropertiesDialog when syncing the layer properties
     */
    void updateFieldsPropertiesDialog();

  private:

    void saveStyleAs( StyleType styleType );

    //! When provider supports, it will list all the styles relative the layer in a dialog
    void showListOfStylesFromDatabase();

    void updateSymbologyPage();

    void setPbnQueryBuilderEnabled();

    QgsVectorLayer *mLayer = nullptr;

    bool mMetadataFilled;

    QString mOriginalSubsetSQL;

    QMenu *mSaveAsMenu = nullptr;
    QMenu *mLoadStyleMenu = nullptr;

    QAction *mActionLoadStyle = nullptr;
    QAction *mActionSaveStyleAs = nullptr;

    //! Renderer dialog which is shown
    QgsRendererPropertiesDialog *mRendererDialog = nullptr;
    //! Labeling dialog. If apply is pressed, options are applied to vector's QgsLabel
    QgsLabelingWidget *labelingDialog = nullptr;
    //! Actions dialog. If apply is pressed, the actions are stored for later use
    QgsAttributeActionDialog *mActionDialog = nullptr;
    //! Diagram dialog. If apply is pressed, options are applied to vector's diagrams
    QgsDiagramProperties *diagramPropertiesDialog = nullptr;
    //! Fields dialog. If apply is pressed, options are applied to vector's diagrams
    QgsFieldsProperties *mFieldsPropertiesDialog = nullptr;

    //! List of joins of a layer at the time of creation of the dialog. Used to return joins to previous state if dialog is canceled
    QList< QgsVectorLayerJoinInfo > mOldJoins;

    //! A list of additional pages provided by plugins
    QList<QgsMapLayerConfigWidget *> mLayerPropertiesPages;

    /** Previous layer style. Used to reset style to previous state if new style
     * was loaded but dialog is canceled */
    QgsMapLayerStyle mOldStyle;

    void initDiagramTab();

    //! Adds a new join to mJoinTreeWidget
    void addJoinToTreeWidget( const QgsVectorLayerJoinInfo &join, const int insertIndex = -1 );

    QgsExpressionContext mContext;

    QgsExpressionContext createExpressionContext() const override;

    std::unique_ptr<QgsLayerTree> mLayersDependenciesTreeGroup;
    std::unique_ptr<QgsLayerTreeModel> mLayersDependenciesTreeModel;

  private slots:
    void openPanel( QgsPanelWidget *panel );
};

inline QString QgsVectorLayerProperties::displayName()
{
  return txtDisplayName->text();
}
#endif