/*=============================================================================
XMOTO

This file is part of XMOTO.

XMOTO 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.

XMOTO is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with XMOTO; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
=============================================================================*/

#ifndef __BLOCK_H__
#define __BLOCK_H__

class CollisionSystem;
class Line;

#include "common/VTexture.h"
#include "common/VXml.h"
#include "helpers/Color.h"
#include "helpers/VMath.h"
#include <vector>

class FileHandle;
class XMLDocument;
class BSPPoly;
class Block;
class cpBody;
class cpShape;
class ChipmunkWorld;
class PhysicsSettings;
class DBuffer;
class Geom;
template<class T>
struct ColElement;

#define DEFAULT_EDGE_ANGLE 270.0f
#define DEFAULT_EDGE_BLENDCOLOR TColor(255, 255, 255, 255)
#define DEFAULT_EDGE_SCALE -1.0f
#define DEFAULT_EDGE_DEPTH -1.0f

struct EdgeMaterial {
  std::string name;
  std::string texture;
  TColor color;
  float scale, depth;
};

/*===========================================================================
  Convex block vertex
  ===========================================================================*/
class ConvexBlockVertex {
public:
  ConvexBlockVertex(const Vector2f &i_position,
                    const Vector2f &i_texturePosition);
  ~ConvexBlockVertex();

  /* called many many many times, so we inline it, and make it return a ref */
  inline Vector2f &Position() { return m_position; }

  /* called many many many times, so we inline it, and make it return a ref */
  inline Vector2f &TexturePosition() { return m_texturePosition; }

  void setPosition(const Vector2f &i_position);

private:
  Vector2f m_position; /* Position of vertex */
  Vector2f m_texturePosition; /* Posistion of the texture */
};

/*===========================================================================
  Convex block
  ===========================================================================*/
class ConvexBlock {
public:
  ConvexBlock(Block *i_srcBlock = NULL);
  ~ConvexBlock();

  /* called many many many times, so we inline it */
  inline std::vector<ConvexBlockVertex *> &Vertices() { return m_vertices; }

  Block *SourceBlock() const;

  void addVertex(const Vector2f &i_position, const Vector2f &i_texturePosition);
  void Move(const Vector2f &i_vector);

private:
  std::vector<ConvexBlockVertex *> m_vertices; /* Vertices */
  Block *m_srcBlock; /* Source block */
};

class BlockVertex {
public:
  BlockVertex(const Vector2f &i_position, const std::string &i_edgeEffect = "");
  ~BlockVertex();

  inline Vector2f &Position() { return m_position; }
  /* edge from this vertex to the following */
  /* called many many many times, so we inline it, and make it return a ref */
  inline std::string &EdgeEffect() { return m_edgeEffect; }

  void setPosition(const Vector2f &i_position);

  void setTexturePosition(const Vector2f &i_texturePosition);
  void setColor(const TColor &i_color);

private:
  Vector2f m_position;
  Vector2f m_texturePosition;
  std::string m_edgeEffect;
  TColor m_color;
};

class Block {
public:
  Block(std::string i_id);
  ~Block();

  inline std::string &Id() { return m_id; }
  inline std::string &getTexture() { return m_texture; }
  Vector2f InitialPosition() const;
  inline Vector2f &DynamicPosition() { return m_dynamicPosition; }
  inline float DynamicRotation() const { return m_dynamicRotation; }
  inline Vector2f &DynamicRotationCenter() { return m_dynamicRotationCenter; }
  Vector2f DynamicPositionCenter() const;

  bool isBackground() const { return m_background; }
  bool isDynamic() const { return m_dynamic; }
  bool isPhysics() const;
  bool isLayer() const;
  float GripPer20() const;
  float Mass() const;
  float Friction() const;
  float Elasticity() const;
  float TextureScale() const;
  std::vector<BlockVertex *> &Vertices();
  inline std::vector<ConvexBlock *> &ConvexBlocks() { return m_convexBlocks; }
  typedef enum { angle, inside, outside } EdgeDrawMethod;
  EdgeDrawMethod getEdgeDrawMethod();
  float edgeAngle();

  typedef enum { None, Circle } CollisionMethod;
  CollisionMethod getCollisionMethod();
  float getCollisionRadius();

  inline ColElement<Block> *getColElement() { return m_collisionElement; }
  cpBody *getPhysicBody() { return mBody; }
  cpShape *getPhysicShape() { return m_shape; }

  const TColor &getBlendColor() const;

  inline Sprite *getSprite() { return m_sprite; }
  void setTexture(const std::string &i_texture);
  void setTextureScale(float i_textureScale);
  void setBlendColor(const TColor &i_blendColor);
  void setInitialPosition(const Vector2f &i_initialPosition);
  void setBackground(bool i_background);
  void setDynamic(bool i_dynamic);
  void setPhysics(bool i_physics);
  void setIsLayer(bool i_isLayer);
  void setGripPer20(float i_gripPer20);
  void setMass(float i_mass);
  void setFriction(float i_friction);
  void setElasticity(float i_elasticity);
  void setCenter(const Vector2f &i_center);
  void setEdgeDrawMethod(EdgeDrawMethod method);
  void addEdgeMaterial(std::string i_name,
                       std::string i_texture,
                       const TColor &i_blendColor,
                       float i_scale,
                       float i_depth);
  // in degres, not radian
  void setEdgeAngle(float angle);

  /* position where to display ; do not consider block center */
  void setDynamicPosition(const Vector2f &i_dynamicPosition);
  /* postion where to display - the center */
  void setDynamicPositionAccordingToCenter(const Vector2f &i_dynamicPosition);
  /* angle position ; consider of the block center
     returns true if bounding circle has changed.
   */
  bool setDynamicRotation(float i_dynamicRotation);

  void setCollisionMethod(CollisionMethod method);
  void setCollisionRadius(float radius);

  void translate(float x, float y);
  void setPhysicsPosition(float ix, float iy);

  int loadToPlay(CollisionSystem *io_collisionSystem,
                 ChipmunkWorld *i_chipmunkWorld,
                 PhysicsSettings *i_physicsSettings,
                 bool i_loadBSP);
  void unloadToPlay();

  void saveBinary(FileHandle *i_pfh);
  static bool isPhysics_readFromXml(xmlNodePtr pElem);
  static Block *readFromXml(
    xmlNodePtr pElem,
    bool i_loadMainLayerOnly); // return NULL if the block must not be loaded
  static Block *readFromBinary(FileHandle *i_pfh);
  AABB &getAABB();
  BoundingCircle &getBCircle() { return m_BCircle; }
  std::vector<Line *> &getCollisionLines() { return m_collisionLines; }

  Geom *getGeom() { return m_geom; }
  void setGeom(Geom *geom) { m_geom = geom; }
  int getLayer() { return m_layer; }
  void setLayer(int layer) { m_layer = layer; }

  std::vector<Geom *> &getEdgeGeoms();
  void setEdgeGeoms(std::vector<Geom *> i_geomVec) { m_edgeGeoms = i_geomVec; };
  std::string getEdgeMaterialTexture(std::string i_materialName);
  TColor &getEdgeMaterialColor(std::string i_materialName);
  float getEdgeMaterialDepth(std::string i_materialName);
  float getEdgeMaterialScale(std::string i_materialName);
  bool edgeGeomExists(std::string texture);

  void updatePhysics(int i_time,
                     int timeStep,
                     CollisionSystem *io_collisionSystem,
                     DBuffer *i_recorder);

  // calculate edge position
  void calculateEdgePosition_angle(Vector2f i_vA,
                                   Vector2f i_vB,
                                   Vector2f &o_a1,
                                   Vector2f &o_b1,
                                   Vector2f &o_b2,
                                   Vector2f &o_a2,
                                   float i_border,
                                   float i_depth,
                                   Vector2f i_center,
                                   float i_angle);
  void calculateEdgePosition_inout(Vector2f i_vA1,
                                   Vector2f i_vB1,
                                   Vector2f i_vC1,
                                   Vector2f &o_a1,
                                   Vector2f &o_b1,
                                   Vector2f &o_b2,
                                   Vector2f &o_a2,
                                   Vector2f &o_c1,
                                   Vector2f &o_c2,
                                   float i_border,
                                   float i_depth,
                                   Vector2f center,
                                   Vector2f i_oldC2,
                                   Vector2f i_oldB2,
                                   bool i_useOld,
                                   bool i_AisLast,
                                   bool &o_swapDone,
                                   bool i_inside);

private:
  std::string m_id;
  std::string m_texture;
  Sprite *m_sprite;
  float m_textureScale;
  Vector2f m_initialPosition;
  float m_initialRotation;

  TColor m_blendColor;

  std::vector<BlockVertex *> m_vertices;
  std::vector<ConvexBlock *> m_convexBlocks;
  // one geom for each edge texture
  std::vector<Geom *> m_edgeGeoms;
  // one Material (edge texture, blend color, scale and depth ) for each geom
  std::vector<EdgeMaterial> m_edgeMaterial;
  TColor m_edgeDefaultColor;

  bool m_background;
  bool m_dynamic;
  bool m_physics;
  bool m_isLayer;
  // the background layer of the block.
  // in case of a non m_backgroundLevel, if m_layer is != -1, then it's
  // a static block from the second static blocks layer
  int m_layer;
  float m_gripPer20; /* GRIP of the block /20 of the physicSettings */

  /* chipmunk physics */
  float m_mass; /* mass of the block */
  float m_friction; /* friction of the block */
  float m_elasticity; /* elasticity of the block */
  cpBody *mBody;
  cpShape *m_shape;

  // AABB for static blocks
  AABB m_BBox;
  // BoundingCircle for dynamic blocks
  BoundingCircle m_BCircle;
  bool m_isBBoxDirty;

  ColElement<Block> *m_collisionElement;
  CollisionMethod m_collisionMethod;
  float m_collisionRadius;

  // the geom used to render the block
  Geom *m_geom;

  /* properties for dynamic */
  float m_dynamicRotation; /* Block rotation */
  Vector2f m_dynamicRotationCenter;
  Vector2f m_dynamicPositionCenter;
  Vector2f m_dynamicPosition; /* Block position */
  std::vector<Line *> m_collisionLines; /* Line to collide against */

  void addPoly(BSPPoly *i_poly,
               CollisionSystem *io_collisionSystem,
               float scale);
  // dynamic background blocks only need to compute the collision lines once.
  void updateCollisionLines(bool setDirty = false, bool forceUpdate = false);
  void translateCollisionLines(float x, float y);

  EdgeDrawMethod m_edgeDrawMethod;
  float m_edgeAngle;

  EdgeDrawMethod stringToEdge(std::string method);
  CollisionMethod stringToColMethod(std::string method);

  /* chimpmunk save */
  Vector2f m_previousSavedPosition;
  float m_previousSavedRotation;
};

#endif /* __BLOCK_H__ */
