#include <gb/gb.h>
#include <gb/drawing.h>
#include "tiles/tiles.c"
#include "tiles/sprite.c"
#include "maps/map.c"
unsigned int sprx = 24; //sprite's x pos
unsigned int spry = 32; //sprite's y pos
unsigned int colx, coly;    //collision detection coordinates
unsigned int colmap[360] = {    //collision map
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
    1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,1,
    1,1,1,1,1,1,1,1,1,0,0,0,1,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,1,0,0,0,1,1,1,1,0,0,0,1,
    1,1,1,1,1,1,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,1,
    1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
    1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,1,
    1,0,0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,
    1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,
    1,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,
    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1
};
unsigned int coltest(){         //bounding box collision detection
    unsigned int i;
    unsigned int coltrue = 0;
    for(i = 0; i < 360; i++){
        if (colmap[i] == 1){
            colx = ((i%20)*8) + 8;
            coly = ((i/20)*8) + 16;
            if((sprx < (colx + 8)) && ((sprx + 8) > colx) && (spry < (coly + 8)) && ((spry + 8) > coly)){
                coltrue ++; //return 1 for collision
            }
        }
    }
    return coltrue;
}
void main(){
    DISPLAY_ON;
    set_bkg_data(0, 2, tile);           //load 3 tiles into background memory
    set_bkg_tiles(0, 0, 20, 18, map);   //load map on display
    set_sprite_data(0, 0, sprite);      //load 1 tile into sprite memory
    set_sprite_tile(0, 0);              //load sprite on display
    SHOW_BKG;
    SHOW_SPRITES;
    move_sprite(0,sprx,spry);
    while(coltest() == 0){
        move_sprite(0,sprx,spry);       //move sprite
        if(joypad() == J_UP){
            spry --;
        }
        if(joypad() == J_DOWN){
            spry ++;
        }
        if(joypad() == J_RIGHT){
            sprx ++;
        }
        if(joypad() == J_LEFT){
            sprx --;
        }

        delay(20);
    }
}