#include "led.h"
#include "ledconfig.h"
#include "string.h"
//#include "text.h"
#include "font.h"

/// Return the number of frames that should be
/// painted between updates
char getFramesPerUpdate() {
  return 80;
}

//#define SET_PIXEL( p, x, y ) { p[(LINE_SIZE*y) + (x/8)] |= 0x01 << (x%8); }

void setPixel(unsigned char* pFrame, uint8_t x, uint8_t y) {
  pFrame += LINE_SIZE*y;
  pFrame += x/8;
  *pFrame |= 1 << (x%8);
}

uint16_t getWidth(char* pText) {
  uint16_t width = 0;
  while (*pText) {
    if (*pText == ' ') { 
      width += 3 + 1;
    } else {
      width += get_char_len(*pText) + 1;
    }
    pText++;
  }
  return width;
}

// returns width
uint8_t writeChar(unsigned char* pFrame, uint8_t c, int16_t offset) {
  if (c == ' ') { return 3; }
  uint8_t i,j;
  uint8_t len = get_char_len(c);
  for ( i = 0; i < HEIGHT; i++ ) {
    for (j = 0; j < len; j++) {
      int16_t aoff = offset + j;
      if ((aoff < WIDTH) && (aoff >= 0) && get_char_bit(c,i,j)) {
	setPixel(pFrame,j+offset,i);
      }
    }
  }
  return len;
}

int8_t print( unsigned char* pFrame, char* pText, int16_t offset ) {
  while ( *pText && (offset < WIDTH) ) {
    uint8_t len = writeChar( pFrame, *pText, offset );
    offset += len + 1;
    pText++;
  }
  return offset;
}

/// Load the next frame into the provided buffer.
/// The frameSeq parameter contains the number of
/// frames that have been displayed since startup.
/// The lines appear sequentially in the buffer, so
/// that the layout is:
/// |  line0  |  line1  |  line2  |  ...  |  line6 |
/// pFrame    pFrame+8  pFrame+16     ...  pFrame+56
void getNextFrame( unsigned char* pFrame, uint32_t frameSeq )
{
  unsigned char i;
  for ( i =0; i < BUF_SIZE; i++ ) {
    pFrame[i] = 0;
  }
  {
    char* msg = "MEGASCROLLER WANTS A COOKIE ;) ";
    int32_t width = getWidth(msg);
    int32_t off = -(frameSeq%width);
    print(pFrame,msg,off);
    print(pFrame,msg,off+width);
    //print(pFrame,msg,off+width);
    
  }
  
}