/*  example code for cc65, for NES
 *  construct some sprites / metasprites
 *  using neslib
 *  Doug Fraker 2018
 */



#include "LIB/neslib.h"
#include "LIB/nesdoug.h"
#include "Sprites.h" // holds our metasprite data

#define MAX_BULLETS 1000

#pragma bss-name(push, "ZEROPAGE")

// GLOBAL VARIABLES
unsigned char y_position=0x40; // all share same Y, which increases every frame
unsigned char x_position=0x88;
unsigned char x_position2=0xa0;
unsigned char x_position3=0xc0;
unsigned char sprid; // remember the index into the sprite buffer
unsigned char pad1;
unsigned char b1index;
unsigned char index;
unsigned char shooting=22;
unsigned char shoot2;



const unsigned char text[]="Sprites";

const unsigned char palette_bg[]={
0x0f, 0x00, 0x10, 0x30, // black, gray, lt gray, white
0,0,0,0,
0,0,0,0,
0,0,0,0
};

const unsigned char palette_sp[]={
0x0f, 0x17, 0x28, 0x28, // black, black, yellow
0,0,0,0,
0,0,0,0,
0,0,0,0
};

struct BoxGuy {
    unsigned char x;
    unsigned char y;
    unsigned char width;
    unsigned char height;
};

struct BoxGuy BoxGuy1 = {20,20,23,23};



/* struct bullet {
    unsigned char x;
    unsigned char y;

}
*/

unsigned char bullet_x[64];
unsigned char bullet_y[64];

void movement(void);


void main (void) {

    ppu_off(); // screen off

    // load the palettes
    pal_bg(palette_bg);
    pal_spr(palette_sp);

    // use the second set of tiles for sprites
    // both bg and sprite are set to 0 by default
    bank_spr(1);

    // load the text
    // vram_adr(NTADR_A(x,y));
    vram_adr(NTADR_A(7,14)); // set a start position for the text

    // vram_write draws the array to the screen
    vram_write(text,sizeof(text));

    ppu_on_all(); // turn on screen



    while (1){
        // infinite loop

        ppu_wait_nmi(); // wait till beginning of the frame
        // the sprites are pushed from a buffer to the OAM during nmi

        // clear all sprites from sprite buffer
        oam_clear();

        pad1 = pad_poll(0); // read the first controller

        // reset index into the sprite buffer
        sprid = 0;

        // push a single sprite
        // oam_spr(unsigned char x,unsigned char y,unsigned char chrnum,unsigned char attr,unsigned char sprid);
        // use tile #0, palette #0
        sprid = oam_spr(x_position, y_position, 0, 0, sprid);

        // push a metasprite
        // oam_meta_spr(unsigned char x,unsigned char y,unsigned char sprid,const unsigned char *data);
        sprid = oam_meta_spr(x_position2, y_position, sprid, metasprite);

        // and another
        sprid = oam_meta_spr(BoxGuy1.x, BoxGuy1.y, sprid, metasprite2);

        shoot2=pad1 & PAD_A;

        /*if (b1index>0){
            sprid = oam_spr(bullet_x[b1index], bullet_y[b1index], 0, 0, sprid);
            bullet_x[b1index]+=4;
            } */



        movement();
        ++x_position;
        x_position2+=2;// every frame, shift them down 1 pixel
        // note, y positions 0xef-0xff will not appear on the screen

        //SHOOTING CODE
        if (shooting==22){
        if(pad1 & PAD_A) {
            shooting=3;
            b1index+=1;
                bullet_x[b1index]=BoxGuy1.x;
                bullet_y[b1index]=BoxGuy1.y;
        }

}
//allow shooting after lifting the shoot key
 if (shoot2==0){shooting=22;}

 //move da bullets
 if (b1index>0){
        for(index=0;index<64;index++){

            sprid = oam_spr(bullet_x[index], bullet_y[index], 0, 0, sprid);
            bullet_x[index]+=4;
            }
            }
}
}




void movement(void){
    if(pad1 & PAD_LEFT){
        BoxGuy1.x -= 1;
    }
    else if (pad1 & PAD_RIGHT){
        BoxGuy1.x += 1;
    }
    if(pad1 & PAD_UP){
        BoxGuy1.y -= 1;
    }
    else if (pad1 & PAD_DOWN){
        BoxGuy1.y += 1;
    }


}