#include <Wire.h>
#include <RTClib.h>
#include <DHT.h>
#include <WiFi.h>
#include <HTTPClient.h>
//#include "DHTesp.h"


// Define multiplexer pins
#define S0 16
#define S1 17
#define S2 18
#define S3 19
#define SIG 34  // MUX Signal pin for input/output

// Segment pins (connect directly to ESP32 GPIOs)
const int segmentPins[] = {23, 22, 21, 5, 4, 2, 15};

// Define multiplexer channel selection values
const int channelCount = 16;

// RTC and DHT definitions
RTC_DS1307 rtc;
#define DHTPIN 13
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// WiFi credentials
// const char* ssid = "YOUR_WIFI_SSID";
// const char* password = "YOUR_WIFI_PASSWORD";
const char* serverURL = "http://your-server.com/log";  // Replace with your server URL

// Segment values for digits 0-9
const byte digits[] = {
  0b00111111,  // 0
  0b00000110,  // 1
  0b01011011,  // 2
  0b01001111,  // 3
  0b01100110,  // 4
  0b01101101,  // 5
  0b01111101,  // 6
  0b00000111,  // 7
  0b01111111,  // 8
  0b01101111   // 9
};

void setup() {
  Serial.begin(115200);

  // Initialize multiplexer control pins
  pinMode(S0, OUTPUT);
  pinMode(S1, OUTPUT);
  pinMode(S2, OUTPUT);
  pinMode(S3, OUTPUT);

  // Initialize segment pins
  for (int i = 0; i < 7; i++) {
    pinMode(segmentPins[i], OUTPUT);
    digitalWrite(segmentPins[i], LOW);  // Turn off segments
  }

  // Initialize RTC and DHT
  Wire.begin();
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
  if (!rtc.isrunning()) {
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
  dht.begin();

  // Connect to WiFi
  Serial.begin(9600);
  Serial.print("Connecting to WiFi");
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected!");
}

void selectMuxChannel(int channel) {
  // Set multiplexer channel
  digitalWrite(S0, channel & 1);
  digitalWrite(S1, (channel >> 1) & 1);
  digitalWrite(S2, (channel >> 2) & 1);
  digitalWrite(S3, (channel >> 3) & 1);
}

void displayDigit(int channel, int value) {
  // Select the corresponding MUX channel
  selectMuxChannel(channel);

  // Write segment data
  for (int i = 0; i < 7; i++) {
    digitalWrite(segmentPins[i], (digits[value] >> i) & 1);
  }
  delay(5);  // Display the digit briefly
}

/*
void displayNumber(int startChannel, int number) {
  // Break number into individual digits and display them
  for (int i = 0; i < 6; i++) {
    int digit = number % 10;
    displayDigit(startChannel + i, digit);
    number /= 10;
  }
}
*/

void displayNumber(int startChannel, int number) {
  // Break number into individual digits and display them
  for (int i = 5; i >= 0; i--) {  // Display 6 digits max
    int digit = number % 10;
    displayDigit(startChannel + i, digit);
    number /= 10;
  }
}

void sendToServer(float temperature, float humidity) {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin(serverURL);

    // Prepare data
    String payload = "temperature=" + String(temperature) + "&humidity=" + String(humidity);

    // Send POST request
    http.addHeader("Content-Type", "application/x-www-form-urlencoded");
    int responseCode = http.POST(payload);
    if (responseCode > 0) {
      Serial.println("Data logged successfully");
    } else {
      Serial.println("Failed to send data");
    }
    http.end();
  } else {
    Serial.println("WiFi not connected");
  }
}

void loop() {
  DateTime now = rtc.now();  // Get the current time

  // Get temperature and humidity
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  // Print time (HH:MM:SS)
  Serial.print("Time: ");
  Serial.print(now.hour());
  Serial.print(":");
  Serial.print(now.minute());
  Serial.print(":");
  Serial.println(now.second());

  // Print date (DDMMYYYY)
  Serial.print("Date: ");
  Serial.print(now.day());
  Serial.print("/");
  Serial.print(now.month());
  Serial.print("/");
  Serial.println(now.year());

  // Print temperature and humidity
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" °C\t");

  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");

  // Display time (HH:MM:SS)
  displayNumber(0, now.hour() * 10000 + now.minute() * 100 + now.second());

  // Display date (DDMMYYYY)
  displayNumber(6, now.day() * 1000000 + now.month() * 10000 + now.year());

  // Display temperature and humidity
  displayNumber(12, (int)temperature);
  displayNumber(14, (int)humidity);

  // Log temperature and humidity to server
  sendToServer(temperature, humidity);

  delay(1000);  // Update every second
}