#include <stdio.h>

#include <clib/exec_protos.h>
#include <clib/graphics_protos.h>
#include <exec/exec.h>

#include <hardware/custom.h>
#include <hardware/dmabits.h>
#include <hardware/cia.h>

#include <graphics/gfx.h>

#include "system/blitter.h"
#include "system/copper.h"
#include "system/system.h"

#include "screen.h"
#include "types.h"
#include "bun.h"

extern struct Custom far custom;
extern struct CIA far ciaa;

// this should be large enough to hold one bitplane of the largest object
// you are blitting, plus one additional word on each side
#define SCRATCH_AREA_WIDTH_BYTES (8)
#define SCRATCH_AREA_HEIGHT_ROWS (34)
#define SCRATCH_AREA_MEMORY_SIZE (SCRATCH_AREA_WIDTH_BYTES * SCRATCH_AREA_HEIGHT_ROWS)

volatile short *dbg = (volatile short *)0x100;

unsigned char *scratchArea;
struct ScreenSetup screenSetup;
struct CurrentScreen currentScreen;
void *copperlistBitplanePointers[8][2];
void *copperlistSpritePointers[8];

#define offsetof(s, m) &((struct s *)0)->m
uint16_t custom_color = (uint16_t)offsetof(Custom, color);
uint16_t custom_sprite = (uint16_t)offsetof(Custom, sprpt);
uint16_t custom_sprite_control = (uint16_t)offsetof(Custom, spr);

uint16_t spritePositionsEachLine[256][2];

void calculageSpritePositionsEachLine() {
  int i;

  for (i = 0; i < 255; ++i) {

  }
}

#define SPRPOS(x, y) (((y & 0xff) << 8) + ((x & 0x1fe) >> 1))
#define SPRCTL(x, y, height) ( \
  ((height & 0xff) << 8) + \
  ((y & 0x100) >> 6) + \
  ((height & 0x100) >> 7) + \
  (x & 1) \
)

extern uint8_t chip TopazBitplanes[];
extern uint16_t chip CopperColors[];
extern uint16_t chip SpriteCopperlist[];
extern uint16_t chip SpriteData[];
extern uint16_t chip MaskBitplane[];

int main(void) {
  uint16_t *copperlist, *currentCopperlist, *currentCopperColors, result, *currentSpriteCopperlist;
  uint32_t spriteDataPointer;
  int i, x, y, height, plane;

  struct BunRenderer bunRenderer;

  color_t colors[8];

  colors[0] = 0x09b8;
  colors[1] = 0x0000;
  colors[2] = 0x0fff;
  colors[3] = 0x000f;

  printf("%x\n", &SpriteData);
  printf("setting up, i haven't crashed...yet.\n");

  setupScreen(&screenSetup, SCREEN_WIDTH, SCREEN_HEIGHT, 3);
  setupInitialCurrentScreen(&screenSetup, &currentScreen);

  setupBunRenderer(&bunRenderer, &screenSetup, &currentScreen);

  // blitter copy the first bitplane row down to the second

  copperlist = prepareNewCopperlist();

  takeOverSystem();

  setCopperlist(copperlist);
  setUpDisplay((uint32_t)screenSetup.bitplanes);

  currentCopperlist = addDisplayToCopperlist(
    copperlist,
    &screenSetup,
    &currentScreen,
    &copperlistBitplanePointers
  );
  currentCopperlist = setUpEmptySpritesInCopperlist(currentCopperlist);

  currentCopperColors = CopperColors;
  currentSpriteCopperlist = SpriteCopperlist;

  *(currentCopperlist++) = custom_color + 2;
  *(currentCopperlist++) = 0x000;

  *(currentCopperlist++) = custom_color + 4;
  *(currentCopperlist++) = 0xfff;

  for (i = 0; i < 8; ++i) {
    spriteDataPointer = (uint32_t)&SpriteData;
    spriteDataPointer += ((256 + 2) * 4) * i;

    *(currentCopperlist++) = custom_sprite + i * 4;
    *(currentCopperlist++) = (spriteDataPointer >> 16);

    *(currentCopperlist++) = custom_sprite + 2 + i * 4;
    *(currentCopperlist++) = (spriteDataPointer & 0xffff);
  }

  *(currentCopperlist++) = custom_color;
  *(currentCopperlist++) = 0x3a6;

  for (y = 0; y < 256; ++y) {
    for (i = 0; i < 8; ++i) {
      *(currentCopperlist++) = custom_color + 32 + (
        // sprite color group
        (i / 2) * 4 +
        // 0 is transparent
        1 +
        i % 2
      ) * 2;

      *(currentCopperlist++) = *(currentSpriteCopperlist++);
      //*(currentCopperlist++) = 0xf0f;

      //currentSpriteCopperlist++;

      *(currentCopperlist++) = custom_sprite_control + i * 8;
      *(currentCopperlist++) = *(currentSpriteCopperlist++);

      *(currentCopperlist++) = custom_sprite_control + i * 8 + 2;
      *(currentCopperlist++) = *(currentSpriteCopperlist++);
    }

    for (i = 3; i < 8; ++i) {
      *(currentCopperlist++) = custom_color + (i * 2);
      *(currentCopperlist++) = *(currentCopperColors++);
    }

    *(currentCopperlist++) = 1 + ((31 + (256 / 4)) << 1) + ((44 + y) << 8);
    *(currentCopperlist++) = 0xFFFE;
    /*
    *(currentCopperlist++) = custom_color;
    *(currentCopperlist++) = 0x9b8;
    */

    /*
    *(currentCopperlist++) = 1 + (1 << 1) + ((44 + y) << 8);
    *(currentCopperlist++) = 0xFFFE;
    */

    /*
    *(currentCopperlist++) = 1 + ((31 + (320 / 4)) << 1) + ((44 + y) << 8);
    *(currentCopperlist++) = 0xFFFE;
    *(currentCopperlist++) = custom_color;
    *(currentCopperlist++) = 0x000;
  */
  }

  endCopperlist(currentCopperlist);

  i = 0;

  while (1) {
    swapCurrentScreenBuffer(&screenSetup, &currentScreen);

    clearCurrentBuns(&bunRenderer);

    /*
    for (plane = 0; plane < 2; ++plane) {
      custom.bltcon0 = 0xc0 + (1 << 8);
      custom.bltcon1 = 0;
      custom.bltadat = 0x0000;
      custom.bltafwm = 0xffff;
      custom.bltalwm = 0xffff;
      custom.bltdpt = currentScreen.planes[plane];
      custom.bltdmod = 0;
      custom.bltsize = screenSetup.byteWidth / 2 + (screenSetup.height << 6);
      WaitBlit();
    }
    */

    renderBunFrame(i, &bunRenderer);

    /*
  */

    for (plane = 0; plane < 3; ++plane) {
      custom.bltcon0 = 0xca + (1 << 8) + (1 << 9) + (1 << 10) + (1 << 11);
      custom.bltcon1 = 0;
      custom.bltafwm = 0xffff;
      custom.bltalwm = 0xffff;
      custom.bltapt = MaskBitplane;
      custom.bltbpt = TopazBitplanes + (plane * 32 * 256);
      custom.bltcpt = currentScreen.planes[plane];
      custom.bltdpt = currentScreen.planes[plane];
      custom.bltamod = 0;
      custom.bltbmod = 0;
      custom.bltcmod = screenSetup.byteWidth - 32;
      custom.bltdmod = screenSetup.byteWidth - 32;
      custom.bltsize = 16 + (256 << 6);

      WaitBlit();
    }

    /*
    *(SpriteData) = SPRPOS(250, 44);
    *(SpriteData + 1) = SPRCTL(250, 44, 44 + 257);
    */

    updateDisplayInCopperList(
      &screenSetup,
      &currentScreen,
      copperlistBitplanePointers
    );


    WaitTOF();
    
    if ((ciaa.ciapra >> 6) != 3) break;

    i++;
    i %= FRAMES_FOR_SCREEN;
  }

  /*
  for (i = 0; i < 200; ++i) {
    WaitTOF();
  }
  */

  giveBackSystem();

  teardownScreen(&screenSetup);

  /*
  for (i = 0; i < 50; ++i) {
    printf("%x %x\n", copperlist[i * 2], copperlist[i * 2 + 1]);
  }
*/

  printf("%x %x", SPRPOS(250, 44), SPRCTL(250, 44, 44 + 256));

  freeCopperlist(copperlist);

  teardownBunRenderer();

  return 0;
}