#include <Adafruit_GFX.h>
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(16, 16, 2, 1, 16,
                            NEO_MATRIX_TOP + NEO_MATRIX_LEFT +
                            NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG +
                            NEO_TILE_TOP + NEO_TILE_LEFT + NEO_TILE_ROWS +
                            NEO_TILE_PROGRESSIVE, NEO_GRB + NEO_KHZ800);
int i=0;

#define NUM_COLORS 7
const PROGMEM uint16_t colors[NUM_COLORS] = {
  Adafruit_NeoMatrix::Color(127, 0, 0),
  Adafruit_NeoMatrix::Color(0, 127, 0),
  Adafruit_NeoMatrix::Color(0, 0, 127),
  Adafruit_NeoMatrix::Color(127, 0, 127),
  Adafruit_NeoMatrix::Color(127, 127, 0),
  Adafruit_NeoMatrix::Color(0, 127, 127),
  Adafruit_NeoMatrix::Color(127, 127, 127)
};
uint16_t currColor[2];

typedef struct {
  char text[17]={0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
  byte len = 0;
  unsigned char speed;
  signed char pos = 0;
  unsigned long millis = 0;
} runtext;

runtext text[2];

void setParams(runtext *textstruct, char* text, unsigned char speed){
  strncpy(textstruct->text, text, 16);
  textstruct->len=min((int)strlen(text),16);
  textstruct->speed=speed;
}

bool changed=true;

void setup()
{
    matrix.begin();
    matrix.setTextSize(1);
    matrix.setTextWrap(false);
    currColor[0] = colors[random(NUM_COLORS)];
    currColor[1] = colors[random(NUM_COLORS)];

    setParams(&text[0], "/usr/space", 1000);
    setParams(&text[1], "Wir haben offen!", 100);
}

void move(runtext *textstruct, int row){
  if(millis()-(textstruct+row)->millis>=(textstruct+row)->speed){
      (textstruct+row)->millis=millis();
      changed=true;
      (textstruct+row)->pos--;
      if((textstruct+row)->pos < -(textstruct+row)->len*6){
        (textstruct+row)->pos = matrix.width();
        currColor[row]=colors[random(NUM_COLORS)];
      }
    }
}


void loop()
{
  if(changed){
    matrix.fillScreen(matrix.Color(0, 0, 0));
    matrix.setCursor(text[0].pos, 0);
    matrix.setTextColor(currColor[0]);
    matrix.print(text[0].text);
    
    matrix.setCursor(text[1].pos, 8);
    matrix.setTextColor(currColor[1]);
    matrix.print(text[1].text);

    portDISABLE_INTERRUPTS();
    delay(5);
    matrix.show();
    delay(5);
    portENABLE_INTERRUPTS();
    
    changed=false;
  }
  move(text,0);
  move(text,1);
}