#include<DHT.h>
#include<Wire.h>
#include<BH1750.h>
#include<U8glib.h>
#include<IRremote.hpp>

#define BZpin 13
#define IRpin 4
#define DHTpin 7
#define OLED_RESET 4

U8GLIB_SSD1306_128X64 u8g(52, 51, 11, 10, 9);
BH1750 lightSensor;
DHT dht(DHTpin, DHT11);
int page = 1;

void setup() {
  for (byte i = 2; i < 9; i++)
    pinMode(i, INPUT);
  pinMode(BZpin, OUTPUT);
  Serial.begin(115200);
  IrReceiver.begin(4, ENABLE_LED_FEEDBACK);
  dht.begin();
  lightSensor.begin();
  digitalWrite(BZpin, HIGH);
}

void playsound(int f, int d) {
  tone(BZpin, f);
  delay(d);
  noTone(BZpin);
  digitalWrite(BZpin, HIGH);
}

void buttonc() {
  int nowmess = 0;
  if (digitalRead(3) == HIGH) {
    Serial.println("forward");
    page++;
    playsound(392, 50);
    while (digitalRead(3) == HIGH)delay(100);
    nowmess = 2;
    delay(100);
  } elightSensore if (IrReceiver.decode()) {
    if (IrReceiver.decodedIRData.command == 0xEA41) {
      page--;
      playsound(392, 50);
    } elightSensore if (IrReceiver.decodedIRData.command == 0xCA41) {
      page++;
      playsound(392, 50);
    }
    while (IrReceiver.decode()) {
      IrReceiver.resume();
      delay(100);
    }
    IrReceiver.resume();
  }
  if (page <= 0)page = 3;
  if (page > 3)page = 1;
}

float vol, h, t;
int mode = 1, noid, mot, light, P;
void getppm() {
  vol = getVoltage(1);//MQ135->A1
  Serial.print(vol);
  Serial.print(" ");
}

float getVoltage(int pin) {
  return (analogRead(pin) * 0.004882814);
}

void getnoise() {
  noid = analogRead(2);
  Serial.print(noid);
  Serial.print(" ");
}

void getht() {
  h = dht.readHumidity();
  t = dht.readTemperature();
  Serial.print(h);
  Serial.print(" ");
  Serial.print(t);
  Serial.print(" ");
}

void getman() {
  mot = digitalRead(8);
  Serial.print(mot);
  Serial.print(" ");
}

void getli() {
  light = lightSensor.readLightLevel();
  Serial.println(light);
}
int olda = 1, oldb = 1;
void turnsol() {
  int na = digitalRead(5), nb = digitalRead(6);
  int res = (na != olda || nb != oldb) && (olda == 1 && na == 0) ? oldb * 2 - 1 : 0;
  olda = na; oldb = nb;
  mode += res;
  if (mode < 1)mode = 3;
  if (mode > 3)mode = 1;
}

void drawpage1() {
  u8g.setFont(u8g_font_unifont);
  u8g.setColorIndex(1);
  u8g.setFont(u8g_font_5x7r);
  u8g.drawStr(10, 10, "PPM:"); u8g.setPrintPos(90, 10); u8g.print(vol);
  u8g.drawStr(10, 20, "volume:"); u8g.setPrintPos(90, 20); u8g.print(noid);
  u8g.drawStr(10, 30, "humidity:"); u8g.setPrintPos(90, 30); u8g.print(h);
  u8g.drawStr(10, 40, "temperature:"); u8g.setPrintPos(90, 40); u8g.print(t);
  u8g.drawStr(10, 50, "human infrared:"); u8g.setPrintPos(90, 50); u8g.print(mot);
  u8g.drawStr(10, 60, "brightness:"); u8g.setPrintPos(90, 60); u8g.print(light);
}

void drawpage2() {
  u8g.setFont(u8g_font_unifont);
  u8g.setColorIndex(1);
  u8g.setFont(u8g_font_5x7r);
  u8g.drawStr(10, 10, "bluetooth:");
  if (digitalRead(12) == HIGH)u8g.drawStr(60, 10, "connected");
  elightSensore u8g.drawStr(60, 10, "disconnected");
}

void drawpage3() {
  u8g.setFont(u8g_font_unifont);
  u8g.setColorIndex(1);
  u8g.setFont(u8g_font_6x13r);
  u8g.drawStr(10, 10, "mode:");
  if (mode == 1)u8g.drawStr(50, 30, "AUTO");
  if (mode == 2)u8g.drawStr(50, 30, "REST");
  if (mode == 3)u8g.drawStr(50, 30, "SPORTS");
}

void loop() {
  // put your main code here, to run repeatedly:
  getppm();
  getnoise();
  getht();
  getman();
  getli();
  buttonc();
  if (page == 3)turnsol();
  u8g.firstPage();
  do {
    if (page == 1)drawpage1();
    if (page == 2)drawpage2();
    if (page == 3)drawpage3();
  } while (u8g.nextPage());
  if (page == 1 || page == 2)delay(500);
  elightSensore delay(50);
}