/*
  Project to interface a screen connected to an arduino with data from a vash script.
  Used as start up for a HTPC.
*/

#define BAUD 9600
#define MAIN_DELAY 500
#define DHT_DELAY 10000

// STRING Commands
#define KEY_RESET		'R'
#define KEY_READ		'E'
#define KEY_ECHO		'!'
#define KEY_SET			'S'
//MPD
#define KEY_VOLUME		'V'
#define KEY_TITLE		'T'
#define KEY_ARTIST		'A'
#define KEY_ALBUM		'a'
#define KEY_REPEAT		'r'
#define KEY_SHUFFLE		'z'
#define KEY_RANDOM		'x'
#define KEY_CONSUME		'c'
#define KEY_UPDATE		'u'
#define KEY_SINGLE		's'
#define KEY_PLAYING		'P'
//Sensors
#define KEY_DHT_HUMIDITY		'h'
#define KEY_DHT_TEMPERATURE		't'


// DHT
#include <DHT.h>
#define DHTPIN 7     // what pin we're connected to
#define DHTTYPE DHT22   // DHT 22  (AM2302)
DHT dht(DHTPIN, DHTTYPE); //// Initialize DHT sensor for normal 16mhz Arduino

// OLED thingies
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

//Functionality
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

#define NUMFLAKES 10
#define XPOS 0
#define YPOS 1
#define DELTAY 2


#define LOGO16_GLCD_HEIGHT 16 
#define LOGO16_GLCD_WIDTH  16 
static const unsigned char PROGMEM logo16_glcd_bmp[] =
{ B00000000, B11000000,
  B00000001, B11000000,
  B00000001, B11000000,
  B00000011, B11100000,
  B11110011, B11100000,
  B11111110, B11111000,
  B01111110, B11111111,
  B00110011, B10011111,
  B00011111, B11111100,
  B00001101, B01110000,
  B00011011, B10100000,
  B00111111, B11100000,
  B00111111, B11110000,
  B01111100, B11110000,
  B01110000, B01110000,
  B00000000, B00110000 };

#if (SSD1306_LCDHEIGHT != 32)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif


// Vars
String inputString = "";         // a string to hold incoming data
boolean stringComplete = false;  // whether the string is complete

boolean repeat_bool = false;
boolean shuffle_bool = false;
boolean consume_bool = false;
boolean random_bool = false;
boolean updating_bool = false;
boolean single_bool = false;
boolean playing = false;

int volume = 100;
String title = "  <<  << Title >>  >>  ";
String artist = "  <<  << Artist >>  >>  ";
String album = "  <<  << Album >>  >>  ";

float humidity = 0;
float temperature = 0;

unsigned int tick = 0;
unsigned int maxticks = 0;

void setup()   {
  // initialise serial
  Serial.begin(BAUD);  
  // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3C (for the 128x32)
  // init done
  display.clearDisplay();
  display.display();
  delay(MAIN_DELAY);
  
  initial_layout();
  while(!Serial);
  establishContact();
  layout(tick);
  calcMaxTicks();
  
  
}

void loop() {
  // print the string when a newline arrives:
  if (stringComplete) {
      setFromSerial( inputString );
      
      // clear the string:
      inputString = "";
      stringComplete = false;
  }
  layout(tick++);
  update_sensor_readings(tick);
  if ( tick > maxticks ) tick = 0;
  delay(MAIN_DELAY);
}