//+----------------------------------------------------------------------------+
//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
//| Copyright:    (C) Twan van Laarhoven and the other MSE developers          |
//| License:      GNU General Public License 2 or later (see file COPYING)     |
//+----------------------------------------------------------------------------+

#ifndef HEADER_DATA_ACTION_SYMBOL
#define HEADER_DATA_ACTION_SYMBOL

/** @file data/action/symbol.hpp
 *
 *  Actions operating on Symbols or whole SymbolParts.
 */

// ----------------------------------------------------------------------------- : Includes

#include <util/prec.hpp>
#include <util/action_stack.hpp>
#include <data/symbol.hpp>

// ----------------------------------------------------------------------------- : Transform symbol part

/// Anything that changes one or more parts
class SymbolPartAction : public Action {};

/// Anything that changes a set of parts
class SymbolPartsAction : public SymbolPartAction {
  public:
  SymbolPartsAction(const set<SymbolPartP>& parts);
  
  const set<SymbolPartP> parts;  ///< Affected parts
};

/// Anything that changes a part as displayed in the part list
class SymbolPartListAction : public SymbolPartAction {};

// ----------------------------------------------------------------------------- : Moving symbol parts

/// Move some symbol parts
class SymbolPartMoveAction : public SymbolPartsAction {
  public:
  SymbolPartMoveAction(const set<SymbolPartP>& parts, const Vector2D& delta = Vector2D());
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  /// Update this action to move some more
  void move(const Vector2D& delta);
  
  private:
  Vector2D delta;    ///< How much to move
  Vector2D moved;    ///< How much has been moved
  Bounds   bounds;  ///< Bounding box of the thing we are moving
  
  void movePart(SymbolPart& part); ///< Move a single part
  public:
  bool constrain;    ///< Constrain movement?
  int snap;      ///< Snap to grid?
};

// ----------------------------------------------------------------------------- : Rotating symbol parts

/// Transforming symbol parts using a matrix
class SymbolPartMatrixAction : public SymbolPartsAction {
  public:
  SymbolPartMatrixAction(const set<SymbolPartP>& parts, const Vector2D& center);
  
  /// Update this action to move some more
  void move(const Vector2D& delta);
  
  protected:
  /// Perform the transformation using the given matrix
  void transform(const Matrix2D& m);
  void transform(SymbolPart& part, const Matrix2D& m);
  
  Vector2D center; ///< Center to transform around
};

/// Rotate some symbol parts
class SymbolPartRotateAction : public SymbolPartMatrixAction {
  public:
  SymbolPartRotateAction(const set<SymbolPartP>& parts, const Vector2D& center);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  /// Update this action to rotate to a different angle
  void rotateTo(Radians newAngle);
  
  /// Update this action to rotate by a deltaAngle
  void rotateBy(Radians deltaAngle);
  
  private:
  Radians angle;        ///< How much to rotate?
  public:
  bool constrain;        ///< Constrain movement?
};


// ----------------------------------------------------------------------------- : Shearing symbol parts

/// Shear some symbol parts
class SymbolPartShearAction : public SymbolPartMatrixAction {
  public:
  SymbolPartShearAction(const set<SymbolPartP>& parts, const Vector2D& center);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  /// Change shear by a given amount
  void move(const Vector2D& deltaShear);
  
  private:
  Vector2D shear;        ///< Shearing, shear.x == 0 || shear.y == 0
  Vector2D moved;
  void shearBy(const Vector2D& shear);
  public:
//  bool constrain;        ///< Constrain movement?
  int snap;          ///< Snap to grid?
};


// ----------------------------------------------------------------------------- : Scaling symbol parts

/// Scale some symbol parts
class SymbolPartScaleAction : public SymbolPartsAction {
  public:
  SymbolPartScaleAction(const set<SymbolPartP>& parts, int scaleX, int scaleY);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  /// Change min and max coordinates
  void move(const Vector2D& delta_min, const Vector2D& delta_max);
  /// Update the action's effect
  void update();
  
  private:
  Vector2D old_min,      old_size;    ///< the original pos/size
  Vector2D new_real_min, new_real_size;  ///< the target pos/sizevoid shearBy(const Vector2D& shear)
  Vector2D new_min,      new_size;    ///< the target pos/size after applying constrains
  int scaleX, scaleY;            ///< to what corner are we attached?
  /// Transform everything in the parts
  void transformAll();
  void transformPart(SymbolPart&);
  /// Transform a single vector
  inline Vector2D transform(const Vector2D& v);
  public:
  bool constrain;        ///< Constrain movement?
  int snap;          ///< Snap to grid?
};

// ----------------------------------------------------------------------------- : Change combine mode

/// Change the name of a symbol part
class CombiningModeAction : public SymbolPartsAction {
  public:
  // All parts must be SymbolParts
  CombiningModeAction(const set<SymbolPartP>& parts, SymbolShapeCombine mode);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  private:
  void add(const SymbolPartP&, SymbolShapeCombine mode);
  vector<pair<SymbolShapeP,SymbolShapeCombine> > parts;  ///< Affected parts with new combining modes
};

// ----------------------------------------------------------------------------- : Change name

/// Change the name of a symbol part
class SymbolPartNameAction : public SymbolPartAction {
  public:
  SymbolPartNameAction(const SymbolPartP& part, const String& name, size_t old_cursor, size_t new_cursor);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  virtual bool merge(const Action& action);
  
  public:
  SymbolPartP part;  ///< Affected part
  String part_name;  ///< New name
  size_t old_cursor;  ///< Cursor position
  size_t new_cursor;  ///< Cursor position
};

// ----------------------------------------------------------------------------- : Add symbol part

/// Adding a part to a symbol, added at the front of the list (drawn on top)
class AddSymbolPartAction : public SymbolPartListAction {
  public:
  AddSymbolPartAction(Symbol& symbol, const SymbolPartP& part);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  private:
  Symbol& symbol;    ///< Symbol to add the part to
  SymbolPartP part;  ///< Part to add
};

// ----------------------------------------------------------------------------- : Remove symbol part

/// Removing parts from a symbol
class RemoveSymbolPartsAction : public SymbolPartListAction {
  public:
  RemoveSymbolPartsAction(Symbol& symbol, const set<SymbolPartP>& parts);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  private:
  Symbol& symbol;
  /// Check for removals in a group
  void check(SymbolGroup& group, const set<SymbolPartP>& parts);
  public:
  /// A removal step
  struct Removal {
    inline Removal(SymbolGroup& parent, size_t pos, const SymbolPartP& removed)
      : parent(&parent), pos(pos), removed(removed)
    {}
    SymbolGroup* parent;
    size_t       pos;
    SymbolPartP  removed;
  };
  private:
  /// Removed parts, sorted by ascending pos
  vector<Removal> removals;
};

// ----------------------------------------------------------------------------- : Duplicate symbol parts

/// Duplicating parts in a symbol
class DuplicateSymbolPartsAction : public SymbolPartListAction {
  public:
  DuplicateSymbolPartsAction(Symbol& symbol, const set<SymbolPartP>& parts);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  /// Fill a set with all the new parts
  void getParts(set<SymbolPartP>& parts);
  
  private:
  Symbol& symbol;
  /// Duplicates of parts and their positions, sorted by ascending pos
  vector<pair<SymbolPartP, size_t> > duplications;
};


// ----------------------------------------------------------------------------- : Reorder symbol parts

/// Change the position of a part in a symbol, by moving a part.
class ReorderSymbolPartsAction : public SymbolPartListAction {
  public:
  ReorderSymbolPartsAction(SymbolGroup& old_parent, size_t old_position, SymbolGroup& new_parent, size_t new_position);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  private:
  SymbolGroup* old_parent, *new_parent;///< Parents to move from and to
  public:
  size_t old_position, new_position;  ///< Positions to move from and to
};

/// Break up a single group, and put its contents at a specific position
class UngroupReorderSymbolPartsAction : public SymbolPartListAction {
  public:
  /// Remove all the given groups
  UngroupReorderSymbolPartsAction(SymbolGroup& group_parent, size_t group_pos, SymbolGroup& target_parent, size_t target_pos);
  
  virtual String getName(bool to_undo) const;
  virtual void   perform(bool to_undo);
  
  private:
  SymbolGroup& group_parent;
  size_t       group_pos;
  SymbolGroupP group;      ///< Group to destroy
  SymbolGroup& target_parent;
  size_t       target_pos;
};

// ----------------------------------------------------------------------------- : Group symbol parts

/// Group multiple symbol parts together
class GroupSymbolPartsActionBase : public SymbolPartListAction {
  public:
  GroupSymbolPartsActionBase(SymbolGroup& root);
  
  virtual void perform(bool to_undo);
  
  protected:
  SymbolGroup&        root;      ///< Symbol or group to group stuff in
  vector<SymbolPartP> old_part_list;  ///< Old part list of the symbol
};

/// Group multiple symbol parts together
class GroupSymbolPartsAction : public GroupSymbolPartsActionBase {
  public:
  GroupSymbolPartsAction(SymbolGroup& root, const set<SymbolPartP>& parts, const SymbolGroupP& group);
  
  virtual String getName(bool to_undo) const;
  private:
  SymbolGroupP group;
};

/// Break up one or more SymbolGroups
class UngroupSymbolPartsAction : public GroupSymbolPartsActionBase {
  public:
  /// Remove all the given groups
  UngroupSymbolPartsAction(SymbolGroup& root, const set<SymbolPartP>& groups);
  
  virtual String getName(bool to_undo) const;
};

// ----------------------------------------------------------------------------- : EOF
#endif