#include "RTClib.h"
#include <DHT.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

RTC_DS1307 rtc;
#define DHTPIN 5
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define LDR_PIN 2
#define LARG 128
#define ALT 64
#define OLED_RESET 4

Adafruit_SSD1306 display(LARG,ALT,&Wire,OLED_RESET);


char daysOfTheWeek[7][12] = {"Lunedì", "Martedì", "Mercoledì", "Giovedì", "Venerdì", "Sabato", "Domenica"};

const float GAMMA = 0.7;
const float RL10 = 50;

int BORDO = 3;
const int LARG_SCH = 128;
const int ALT_SCH = 64;
int y, prev_y;
int x = BORDO;

void setup() {
  Serial.begin(115200);
  dht.begin();
   if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)){
    Serial.println(F("SSD1306 Allocation Failed" ));
    for(;;);
  }
  display.clearDisplay();
  axis();
  display.display();
}

void loop() {
  DateTime now = rtc.now();
  float h = dht.readHumidity();
  float t = dht.readTemperature();
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }
  float hif = dht.computeHeatIndex(h);

  int analogValue = analogRead(A13);
  float voltage = analogValue / 1024. * 5;
  float resistance = 2000 * voltage / (1 - voltage / 5);
  float lux = pow(RL10 * 1e3 * pow(10, GAMMA) / resistance, (1 / GAMMA));
  
  Serial.print("Umidità: ");
  Serial.println(h);
  Serial.print("Temperatura: ");
  Serial.println(t);
  //Serial.print("Coeff: ");
  //Serial.println(hif);
  Serial.print("Luminosità: ");
  Serial.println(lux);
  Serial.print(now.year(), DEC);
  Serial.print('/');
  Serial.print(now.month(), DEC);
  Serial.print('/');
  Serial.print(now.day(), DEC);
  Serial.print('/');
  Serial.print(daysOfTheWeek[now.dayOfTheWeek()-1]);
  Serial.print('/');
  Serial.print(now.hour(), DEC);
  Serial.print('/');
  Serial.print(now.minute(), DEC);
  Serial.print('/');
  Serial.println(now.second(), DEC);
  Serial.println("------------------------");
  

  lux = constrain(lux,0,10000);
  y=map(lux,0,10000,ALT_SCH-BORDO,BORDO);
  int sec = now.second();
  Serial.println(sec);
  x = map(sec,0,59,BORDO,(LARG_SCH-BORDO));
  Serial.println(x);
  display.drawLine(x, prev_y, x+1, y,WHITE);
  prev_y=y;
  //x=x+1;
  if (x >= (LARG_SCH-BORDO)){
    x=BORDO;
    display.clearDisplay();
    axis();
    display.display();
  
  }
  

  delay(1000);
  display.display();

}
void axis(){
  display.drawLine(BORDO, BORDO, BORDO,ALT_SCH-BORDO,WHITE);
  display.drawLine(BORDO, ALT_SCH-BORDO, LARG_SCH-BORDO,ALT_SCH-BORDO,WHITE);
  display.drawLine(BORDO, BORDO,BORDO-3,BORDO+4,WHITE);
  display.drawLine( LARG_SCH-BORDO,ALT_SCH-BORDO, LARG_SCH-BORDO-4,ALT_SCH-BORDO+3,WHITE);
}