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#pragma once

#include <OpenFlipper/common/GlobalDefines.hh>
#include <QString>

typedef uint64_t UpdateTypeSet;

/** \brief Update type class
 *
 *
 *  This class is used to specify the scope of updates. There are update types for
 *  selection,geometry,topology,colors,... specified here: \ref DefaultUpdateTypes
 *
 *  You can also find functions to add custom update types at runtime at
 *  \ref UpdateTypeFunctions
 *
 */
class DLLEXPORT UpdateType {
  public:
    UpdateType();

    UpdateType(const UpdateType& _type) = default;
    
    explicit UpdateType(const UpdateTypeSet& _set);
    
    /// Exact compare operator
    bool operator==(const UpdateType& _type) const;

    UpdateType operator|(const UpdateType& _type) const;

    UpdateType& operator|=(const UpdateType& _type);
    
    UpdateType& operator++();
    
    bool operator<( const UpdateType& _i ) const;
    
    /// Check if this update contains the given UpdateType
    bool contains( const UpdateType& _type ) const;
    
//    friend std::ostream &operator<< (
//            std::ostream &os, const UpdateType &type) {
//        return os << type.type_;
//    }

  private:
    UpdateTypeSet type_;
};

/** \defgroup DefaultUpdateTypes Default update types
 * The following update types are predefined for the general use cases
 * @{
 *
 */

/// Empty update for empty initialization of update type
const UpdateType UPDATE_NONE( UpdateTypeSet(0)  );

/// Identifier for all updates
const UpdateType UPDATE_ALL(              UpdateTypeSet(1)       );

/// This is the update identifier for global Object visibility ( show/hide )
const UpdateType UPDATE_VISIBILITY(       UpdateTypeSet(2) );


/** \brief Geometry updated
*
* Updated Geometry ( This update type has to be used if you only modify vertex positions of 
* an object. Everything else has to stay as before the update.
*/
const UpdateType UPDATE_GEOMETRY( UpdateTypeSet(4) );

/** \brief Topology updated
*
* Updated Topology ( This update type has to be used if you modify the topology
* of an object. This includes adding vertices or removing them! )
*/
const UpdateType UPDATE_TOPOLOGY( UpdateTypeSet(8) );


/** \brief Selection updated
*
* Updated Selection ( This update type has to be used if you modify the internal
* selection of an object. Like selecting a single vertex or a set of faces. ). 
*/
const UpdateType UPDATE_SELECTION( UpdateTypeSet(16) );

/** \brief Vertex selection has changed
*
* This is a more fine grained selection update. UPDATE_SELECTION will also match this update type.
*/
const UpdateType UPDATE_SELECTION_VERTICES( UpdateTypeSet(32) );


/** \brief Edge selection has changed
*
* This is a more fine grained selection update. UPDATE_SELECTION will also match this update type.
*/
const UpdateType UPDATE_SELECTION_EDGES( UpdateTypeSet(64) );


/** \brief Halfedge selection has changed
*
* This is a more fine grained selection update. UPDATE_SELECTION will also match this update type.
*/
const UpdateType UPDATE_SELECTION_HALFEDGES( UpdateTypeSet(128) );

/** \brief Face selection has changed
*
* This is a more fine grained selection update. UPDATE_SELECTION will also match this update type.
*/
const UpdateType UPDATE_SELECTION_FACES( UpdateTypeSet(256) );

/** \brief Knot selection has changed
*
* This is a more fine grained selection update. UPDATE_SELECTION will also match this update type.
*/
const UpdateType UPDATE_SELECTION_KNOTS( UpdateTypeSet(512) );

/** \brief Colors have changed
*
* Update the colors. This does not have to be called when topology is also updated
*/
const UpdateType UPDATE_COLOR( UpdateTypeSet(1024) );

/** \brief Textures have changed
*
* Update the Textures.
*/
const UpdateType UPDATE_TEXTURE( UpdateTypeSet(2048) );

/** \brief State has changed
*
* The object's state (target, source) has changed
*/
const UpdateType UPDATE_STATE( UpdateTypeSet(4096) );

/// marks the last used ID
const UpdateType UPDATE_UNUSED ( UpdateTypeSet(8192) );

/**@}*/

//=====================================================================================
// FUNCTIONS
//=====================================================================================


/** \defgroup UpdateTypeFunctions Runtime Update Types
 * Use these functions to add custom update types at runtime.
 * @{
 *
 */

/** Adds a UpdateType and returns the id for the new type
*
* @param _name Internal name for the new UpdateType
* @param _resetNeeded If a sceneGraph reset is needed for this update
*/
DLLEXPORT
UpdateType addUpdateType(QString _name, bool _resetNeeded = true);

/// Given an UpdateType Identifier string this function will return the id of the UpdateType
DLLEXPORT
UpdateType updateType(QString _name);

/** \brief Get the name of a type with given id
*
* The ids are organized in a bit field. So use either the macro for getting the type id or
* use the id directly (they have to be power of 2! ... Bit field)
*/
DLLEXPORT
QString updateTypeName(UpdateType _id);

/** \brief Get the number of registered types
*
* This function will return the number of types registered to the core. You can use it to
* iterate over all types. 
*/
DLLEXPORT 
size_t updateTypeCount();

/**@}*/