#ifndef TWODPHYSICS_H
#define TWODPHYSICS_H

#include <chipmunk/chipmunk.h>
#include "script.h"

extern float phys2d_gravity;
extern int physOn;
extern cpSpace *space;

struct phys2d_shape {
    cpShape *shape;
    int go;
    void *data;
    void (*debugdraw)(void *data);
};

struct phys2d_circle {
    float radius;
    float offset[2];
    struct phys2d_shape shape;
};

struct phys2d_segment {
    float a[2];
    float b[2];
    float thickness;
    struct phys2d_shape shape;
};

struct phys2d_box {
    float w;
    float h;
    float offset[2];
    float r;
    struct phys2d_shape shape;
};

struct phys2d_edge {
    int n;
    float *points;
    float thickness;
    cpShape **shapes;
    struct phys2d_shape shape;
};

struct phys2d_poly {
    int n;
    float *points;
    float radius;
    struct phys2d_shape shape;
};

struct phys2d_circle *Make2DCircle(int go);
void phys2d_circledel(struct phys2d_circle *c);
void phys2d_applycircle(struct phys2d_circle *circle);
void phys2d_dbgdrawcircle(struct phys2d_circle *circle);
void circle_gui(struct phys2d_circle *circle);

struct phys2d_segment *Make2DSegment(int go);
void phys2d_segdel(struct phys2d_segment *seg);
void phys2d_applyseg(struct phys2d_segment *seg);
void phys2d_dbgdrawseg(struct phys2d_segment *seg);
void segment_gui(struct phys2d_segment *seg);

struct phys2d_box *Make2DBox(int go);
void phys2d_boxdel(struct phys2d_box *box);
void phys2d_applybox(struct phys2d_box *box);
void phys2d_dbgdrawbox(struct phys2d_box *box);
void box_gui(struct phys2d_box *box);

struct phys2d_poly *Make2DPoly(int go);
void phys2d_polydel(struct phys2d_poly *poly);
void phys2d_applypoly(struct phys2d_poly *poly);
void phys2d_dbgdrawpoly(struct phys2d_poly *poly);
void phys2d_polyaddvert(struct phys2d_poly *poly);
void poly_gui(struct phys2d_poly *poly);

struct phys2d_edge *Make2DEdge(int go);
void phys2d_edgedel(struct phys2d_edge *edge);
void phys2d_applyedge(struct phys2d_edge *edge);
void phys2d_edgeshapeapply(struct phys2d_shape *mshape, cpShape * shape);
void phys2d_dbgdrawedge(struct phys2d_edge *edge);
void phys2d_edgeaddvert(struct phys2d_edge *edge);
void edge_gui(struct phys2d_edge *edge);


void phys2d_init();
void phys2d_update(float deltaT);

struct phys_cbs {
    struct callee begin;
    struct callee separate;
};

void phys2d_add_handler_type(int cmd, int go,  struct callee c);
void register_collide(void *sym);
void phys2d_set_gravity(cpVect v);

struct color {
    unsigned char r;
    unsigned char g;
    unsigned char b;
};

void set_dbg_color(struct color);
void set_trigger_color(struct color);

void shape_gui(struct phys2d_shape *shape);

void phys2d_reindex_body(cpBody *body);

#endif