#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <DHT.h>

//oled stats
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

//pins
#define DHTPIN 2 // pin connected to DHT11 sensor
#define fanPin 6 //signal pin for fan power
#define fanSig 5 //fan signal from menu system
//changed to 22 for sim.. ~q
#define DHTTYPE DHT22

//variables
int fanPwr = 0;
int overTemp = 0;
float tempF;
float tempC;
float humi;

//screen/oled init
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1); // create SSD1306 display object connected to I2C
DHT dht(DHTPIN, DHTTYPE);

String displayString;

void setup() {
  Serial.begin(9600);
  pinMode(fanSig, INPUT);
  pinMode(fanPin, OUTPUT);

  // initialize OLED display with address 0x3C for 128x64
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }

  delay(2000); // wait for initializing
  oled.clearDisplay(); // clear display

  oled.setTextSize(2); // text size
  oled.setTextColor(WHITE); // text color
  oled.setCursor(0, 10); // position to display

  dht.begin(); // initialize DHT11 the temperature and humidity sensor

  displayString.reserve(10); // to avoid fragmenting memory when using String
}

void loop() {
  delay(350);
  float humi = dht.readHumidity(); // read humidity
  float tempC = dht.readTemperature(); // read temperature
  float tempF = (tempC *= 9) / 5 + 32; //convert temp

  //temp high/low
  if (tempF > 77) {
    overTemp = 1;
  }
  if (tempF < 77) {
    overTemp = 0;
  }

  //fan signal on (read signal pin for fan)
  fanPwr = digitalRead(fanSig);

  //fan on (signal)
  if (fanPwr == 1) { // works like normal
    digitalWrite(fanPin, HIGH);
  }

  //fan on (temp) ***// not working it says over temp is 1 but it isnt activating the fan
  if (overTemp == 1) {
    digitalWrite(fanPin, HIGH);
  }

  //temp low AND fan signal off (fan off) ***// same here but it doesnt turn off
  if (overTemp == 0 && fanPwr == 0) {
    digitalWrite(fanPin, LOW);
    Serial.println("lol");
  }
  Serial.println(tempF);
  Serial.println(overTemp);

  // check if any reads failed
  if (isnan(humi) || isnan(tempC)) {
    displayString = "Failed";
  } else {
    displayString = String(tempF, 1); // one decimal places
    displayString += "F ";
    displayString += String(humi, 1); // one decimal places
    displayString += "%";
  }

  //Serial.println(displayString); // print the temperature in F to Serial Monitor
  oledDisplayCenter(displayString); // display temperature and humidity on OLED
}

void oledDisplayCenter(String text) {
  int16_t x1;
  int16_t y1;
  uint16_t width;
  uint16_t height;

  oled.getTextBounds(text, 0, 0, &x1, &y1, &width, &height);

  // display on horizontal and vertical center
  oled.clearDisplay(); // clear display
  oled.setCursor((SCREEN_WIDTH - width) / 2, (SCREEN_HEIGHT - height) / 2);
  oled.println(text); // text to display
  oled.display();
}