#include <Arduino.h>
#include <SPI.h>
#include <Max72xxPanel.h>
#include <Adafruit_GFX.h>

#define BUZZER_PIN  D2
const boolean WEBSERVER_ENABLED = true;  // Device will provide a web interface
boolean ENABLE_OTA = true;
String OTA_Password = "";
int displayScrollSpeed = 25;

void scrollMessage();

const int pinCS = D6; // Attach CS to this pin, DIN to MOSI and CLK to SCK (cf http://arduino.cc/en/Reference/SPI )
int displayIntensity = 1;  //(Can be set from 0 - 15)
const int numHorizontalDisplays = 8; // default 4 for standard 4 x 1 display Max size of 16
const int numVerticalDisplays = 1; // default 1 for a single row height
/* set ledRotation for LED Display panels (3 is default)
0: no rotation
1: 90 degrees clockwise
2: 180 degrees
3: 90 degrees counter clockwise (default)
*/
int ledRotation = 3;

// LED
const int offset = 1;
int refresh = 0;
int spacer = 1;  // dots between letters
int width = 5 + spacer; // The font width is 5 pixels + spacer
Max72xxPanel matrix = Max72xxPanel(pinCS, numHorizontalDisplays, numVerticalDisplays);

void setup(void){
  Serial.begin(115200);
  delay(10);
  Serial.println('\n');

  Serial.println("Number of LED Displays: " + String(numHorizontalDisplays));
  // initialize display
  matrix.setIntensity(0); // Use a value between 0 and 15 for brightness

  int maxPos = numHorizontalDisplays * numVerticalDisplays;
  for (int i = 0; i < maxPos; i++) {
    matrix.setRotation(i, ledRotation);
    matrix.setPosition(i, maxPos - i - 1, 0);
  }

  Serial.println("matrix created");
  matrix.fillScreen(LOW); // show black

  /*tone(BUZZER_PIN, 415, 500);
  delay(500 * 1.3);
  tone(BUZZER_PIN, 466, 500);
  delay(500 * 1.3);
  tone(BUZZER_PIN, 370, 1000);
  delay(1000 * 1.3);
  noTone(BUZZER_PIN);*/

  for (int inx = 0; inx <= 15; inx++) {
    matrix.setIntensity(inx);
    delay(100);
  }

  for (int inx = 15; inx >= 0; inx--) {
    matrix.setIntensity(inx);
    delay(60);
  }

  delay(1000);
  matrix.setIntensity(displayIntensity);

}

void loop(void){
  scrollMessage();
  delay(10000);
}

void scrollMessage() {
  String msg = "olala";
  msg += " "; // add a space at the end
  for ( unsigned int i = 0 ; i < width * msg.length() + matrix.width() - 1 - spacer; i++ ) {

    if (refresh == 1) i = 0;
    refresh = 0;
    matrix.fillScreen(LOW);

    unsigned int letter = i / width;
    int x = (matrix.width() - 1) - i % width;
    int y = (matrix.height() - 8) / 2; // center the text vertically

    while ( x + width - spacer >= 0 && letter >= 0 ) {
      if ( letter < msg.length() ) {
        matrix.drawChar(x, y, msg[letter], HIGH, LOW, 1);
      }

      letter--;
      x -= width;
    }

    matrix.write(); // Send bitmap to display
    delay(displayScrollSpeed);
  }
  matrix.setCursor(0, 0);
}