#include <Arduino.h>
#include <U8g2lib.h>
#include <Wire.h>
#include <Servo.h>
#include <WiFi.h>
#include <HTTPClient.h>

Servo myservo;

U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, U8X8_PIN_NONE, A4, A5);
static const unsigned char image_Alert_9x8_bits[] U8X8_PROGMEM = {0x10,0x00,0x38,0x00,0x28,0x00,0x6c,0x00,0x6c,0x00,0xfe,0x00,0xee,0x00,0xff,0x01};

#define SENSOR_PIN A0
const int sampleWindow = 50; 
const int threshold = 80; 
const float referenceValue = 0.0744; 
char buffer[32];

const char* ssid = "YourWiFiSSID"; // Update with your WiFi SSID
const char* password = "YourWiFiPassword"; // Update with your WiFi password
const String apiKey = "8A9REPRTD4IP4G6L";

void setup() {
  myservo.attach(9);
  myservo.write(0);
  u8g2.begin(); 
  pinMode(SENSOR_PIN, INPUT);
  Serial.begin(115200);
  connectToWiFi();
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    int sensorValue = analogRead(SENSOR_PIN); 
    int SERVOval = map(sensorValue,0,82.77,0,180);
    u8g2.clearBuffer();

    unsigned long currentMillis = millis();

    double dB = 20 * log10(sensorValue /(double)referenceValue);
    int dBLevel = dB;

    if (dB >= threshold) {
      myservo.write(SERVOval);
    } else {
      myservo.write(0);
    }

    delay(sampleWindow); 
    
    u8g2.setBitmapMode(1);
    u8g2.drawFrame(0, 0, 128, 64);
    u8g2.setFont(u8g2_font_helvB08_tr);
    u8g2.drawStr(9, 23, "NOISE:");
    u8g2.setFont(u8g2_font_profont22_tr);
    sprintf(buffer,"%d dB", dBLevel);
    u8g2.drawStr(58, 23, buffer);
    u8g2.setFont(u8g2_font_helvB08_tr);
    u8g2.drawStr(9, 51, "LEVEL:");

    u8g2.sendBuffer();

    Serial.print("Analog Value: ");
    Serial.print(sensorValue);
    Serial.print(" | Decibels: ");
    Serial.println(dB);

    // Fetch temperature data
    String temperatureData = fetchTemperature();
    float temperature = parseTemperature(temperatureData);
    displayTemperature(temperature);
  } else {
    Serial.println("WiFi not connected!");
    connectToWiFi();
  }
  delay(5000); // Fetch data every 5 seconds
}

void connectToWiFi() {
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting...");
  }
  Serial.println("Connected to WiFi");
}

String fetchTemperature() {
  HTTPClient http;
  String url = "https://api.thingspeak.com/channels/2472958/fields/1/last.json?api_key=" + apiKey;

  http.begin(url);
  int httpResponseCode = http.GET();
  String temperatureData = "";

  if (httpResponseCode == HTTP_CODE_OK) {
    temperatureData = http.getString();
    return temperatureData;
  } else {
    Serial.println("Error fetching temperature data.");
  }
  
  http.end();
  return temperatureData;
}

float parseTemperature(String data) {
  int index = data.indexOf("\"field1\":");
  if (index != -1) {
    index = data.indexOf(":", index);
    if (index != -1) {
      int endIndex = data.indexOf(",", index);
      if (endIndex == -1) {
        endIndex = data.indexOf("}", index);
      }
      if (endIndex != -1) {
        String temperatureString = data.substring(index + 1, endIndex);
        return temperatureString.toFloat();
      }
    }
  }
  Serial.println("Fetching Temperature.");
  return 0.0;
}

void displayTemperature(float temperature) {
  // Display temperature on the screen
}