#include <stdlib.h>
#include <stdbool.h>
#include <vectorlib.c>

#include <SDL2/SDL.h>
#include <SDL2/SDL_video.h>
#include <time.h>

#define PROJECT_NAME "vectors-gravity wind"
#define obj_n 1

typedef struct {
    Point pos;
    Point vel;
    Point acc;
    float r;
} OBJECT_INER;

typedef struct OBJECT {
    OBJECT_INER *objs[obj_n];
} OBJECT;

#include <init.h>

void constructor(int w, int h, OBJECT_INER *obj){
    obj->pos.x = (float)w/2;
    obj->pos.y = (float)h/2;
    obj->vel = (Point){0,0};
    obj->acc = (Point){0,0};
    obj->r = 40;
}

void init_stuffs(int w, int h, OBJECT_INER *objs, STUFFS *stuff){
    srand(time(NULL));
    constructor(w,h,&objs[0]);
}

Point vec_sub(Point A, Point B){
    point_sub(&A, &B);
    return A;
}

void applyForce(OBJECT_INER *obj, Point force){
    point_add(&obj->acc, &force);
}

void edges(STUFFS *stuff, OBJECT_INER *obj) {
    if (obj->pos.y >= stuff->height - obj->r / 2){
        obj->pos.y = stuff->height - obj->r / 2;
        obj->vel.y = obj->vel.y * -1;
    }

    if (obj->pos.x >= stuff->width - obj->r / 2){
        obj->pos.x = stuff->width - obj->r / 2;
        obj->vel.x = obj->vel.x * -1;
    } else if (obj->pos.x <= obj->r / 2){
        obj->pos.x = obj->r / 2;
        obj->vel.x = obj->vel.x * -1;
    }
}

void update(STUFFS *stuff, OBJECT_INER *obj){
    //Point mouse = {
    //    stuff->mx,
    //    stuff->my,
    //};

    //obj->acc = vec_sub(mouse, obj->pos);
    //point_set_mag(&obj->acc, 0.1);
    
    point_add(&obj->vel,&obj->acc);
    point_add(&obj->pos, &obj->vel);
    obj->acc = (Point){0,0};
}

void show(SDL_Renderer* renderer,OBJECT_INER *obj){
    SDL_SetRenderDrawColor(renderer,150,50,255,255);
    SDL_RenderFillRect(renderer,&(SDL_Rect){.x = obj->pos.x - (obj->r / 2), .y=obj->pos.y - (obj->r / 2), .w = obj->r, .h = obj->r});
}

void draw(SDL_Renderer* renderer,SDL_Window* window, STUFFS *stuff){
    SDL_SetRenderDrawColor(renderer,0,0,0,255);
    SDL_RenderClear(renderer);

    if(stuff->mousedown == true){
        Point wind = {0.1, 0};
        applyForce(stuff->obj.objs[0], wind);
    }

    Point gravity = {0, 0.2};
    applyForce(stuff->obj.objs[0], gravity);


    update(stuff,stuff->obj.objs[0]);
    edges(stuff,stuff->obj.objs[0]);
    show(renderer,stuff->obj.objs[0]);

	SDL_RenderPresent(renderer);
}

#include <init.c>