#include <WiFi.h>
#include <Wire.h>
#include "DHTesp.h"

DHTesp dht;

// OLED
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3C

Adafruit_SSD1306 display(SCREEN_WIDTH,SCREEN_HEIGHT,&Wire,OLED_RESET);

// Blynk
#define BLYNK_TEMPLATE_ID           ""
#define BLYNK_TEMPLATE_NAME         ""
#define BLYNK_AUTH_TOKEN            ""
#define BLYNK_PRINT Serial
#include <BlynkSimpleEsp32.h>
#include <ezTime.h>

Timezone local;
BlynkTimer timer; 

// Define pin
#define button1 0
#define button2 2
#define DHT_PIN   15
#define led     4
#define SCL     22
#define SDA     21
#define relay   5

// STA mode
const char *ssid_STA = "Wokwi-GUEST";
const char *password_STA = "";

// Variable
float temperature;
float humadity;

// Blynk
BLYNK_CONNECTED() {
    Blynk.sendInternal("utc", "time");      // Unix timestamp (with msecs)
    Blynk.sendInternal("utc", "tz_rule");   // POSIX TZ rule
    Blynk.sendInternal("meta", "get", "Number");
}
BLYNK_WRITE(InternalPinUTC) {
    String cmd = param[0].asStr();
    if (cmd == "time") {
        const uint64_t utc_time = param[1].asLongLong();
        UTC.setTime(utc_time / 1000, utc_time % 1000);
        Serial.print("Unix time (UTC): "); Serial.println(utc_time);
    } else if (cmd == "tz_rule") {
        String tz_rule = param[1].asStr();
        local.setPosix(tz_rule);
        Serial.print("POSIX TZ rule:   "); Serial.println(tz_rule);
    }
}
BLYNK_WRITE(InternalPinMETA) {
    String field = param[0].asStr();
    if (field == "Number") {
        String value = param[1].asStr();
        Serial.print("Metadata Number: ");
        Serial.println(value);
        // Do something with Metadata value
    }
}

BLYNK_WRITE(V0)
{
  int pinValue = param.asInt();
  Serial.print("BUTTON1 WAS PULLUP");
  Blynk.virtualWrite(V4, pinValue);
  digitalWrite(relay, pinValue);
}

BLYNK_WRITE(V1)
{
  int pinValue = param.asInt();
  Serial.println("BUTTON2 WAS PULLUP");
  //Blynk.virtualWrite(V1, 0);
}

// void main
void setup(void) {
  pinMode(led, OUTPUT);
  pinMode(button1, INPUT_PULLUP);
  pinMode(button2, INPUT_PULLUP);
  pinMode(relay, OUTPUT);
  Serial.begin(115200);
  Serial.println();
  Serial.println("Booting Sketch...");
  // Blynk
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid_STA, password_STA);
  timer.setInterval(1000L, function);
  // OLED
  if (! display.begin(SSD1306_SWITCHCAPVCC,SCREEN_ADDRESS)){
    Serial.println(F("SSD1306 Allocation Failed"));
    for(;;);
  }
  display.display();
  display.clearDisplay();
  // DHT22
  dht.setup(DHT_PIN, DHTesp::DHT22);
}

void loop(void) {
  Blynk.run();
  timer.run();
  digitalWrite(led, HIGH);
  delay(100);
  digitalWrite(led, LOW);
  delay(100);
  display.clearDisplay();
}

void dht_read() {
  TempAndHumidity  data = dht.getTempAndHumidity();
  temperature = data.temperature;
  humadity = data.humidity;
  Blynk.virtualWrite(V2, temperature);
  Blynk.virtualWrite(V3, humadity);
  print_line("Temp:" + (String)temperature, 2,0,0);
  print_line("Huma:" + (String)humadity, 2,0,20);
}
void printClock() {
  //Serial.println("Time: " + local.dateTime());
  Serial.print("Time: " + (String)local.hour() + ":");
  Serial.print((String)local.minute() + ":");
  Serial.println((String)local.second());
  // Time now
  print_line((String)local.hour()+":"+(String)local.minute()+":"+(String)local.second(), 2,0,40);
}
void function()
{
  printClock();
  dht_read();
}
void print_line(String text, int text_size, int column, int row) {
  display.setTextSize(text_size);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(column, row);
  display.println(text);

  display.display();
}