#include "DHT.h"
#include "FS.h"
#include "SD.h"
#include <SPI.h>

#define DHTTYPE DHT22 // DHT 11

struct DHTSensor{
  //Digital (i2c) pin
  uint8_t DHTPin;
  DHT Dht;
  float temmperature;
  float humidity;
};

struct BrightnessSensor{
  //Analog in pin
  uint8_t Pin;
  float brightness;
};

const uint8_t inputPins[12] = {36, 39, 34, 35, 32, 33, 25, 26, 27, 14, 12, 13};

const uint8_t dhtPins[3] = {36, 39, 34};

const uint8_t brightnessPins[5] = {35, 32, 33, 25, 26};

const uint8_t usedDHTSensors = 3; //Number of used DHT Sensors

const uint8_t usedBrightnessSensors = 5; //Number of used brightness sensors

DHTSensor dhtSensors[sizeof(dhtPins) / sizeof(dhtPins[0])];

BrightnessSensor brightnssSensor[(sizeof(brightnessPins) / sizeof(brightnessPins[0]))]


int DHTPin = 4; 
DHT dht(DHTPin, DHTTYPE); 
float Temperature;
float Humidity;
String formattedDate;
String dayStamp;
String timeStamp;
// Define CS pin for the SD card module
#define SD_CS 5
String dataMessage;
void setup() {
  Serial.begin(115200);
  pinMode(DHTPin, INPUT);
  dht.begin();
  
  // Initialize SD card
  SD.begin(SD_CS);  
  if(!SD.begin(SD_CS)) {
    Serial.println("Card Mount Failed");
    return;
  }
  uint8_t cardType = SD.cardType();
  if(cardType == CARD_NONE) {
    Serial.println("No SD card attached");
    return;
  }
  Serial.println("Initializing SD card...");
  if (!SD.begin(SD_CS)) {
    Serial.println("ERROR - SD card initialization failed!");
    return;    // init failed
  }
  File file = SD.open("/data.txt");
  if(!file) {
    Serial.println("File doens't exist");
    Serial.println("Creating file...");
    writeFile(SD, "/data.txt", "Date, Time, Temperature, Humidity \r\n");
  }
  else {
    Serial.println("File already exists");  
  }
  file.close();

  if(usedDHTSensors > (sizeof(dhtPins) / sizeof(dhtPins[0]))){

    usedDHTSensors = sizeof(dhtPins) / sizeof(dhtPins[0]);

  };

  if(usedBrightnessSensors > (sizeof(brightnessPins) / sizeof(brightnessPins[0]))){

    usedBrightnessSensors = sizeof(brightnessPins) / sizeof(brightnessPins[0]);

  };

  for(int i = 0; i < usedDHTSensors; i++){
    pinMode(dhtPins[i], INPUT);

    DHT tempDht(dhtPins[i], DHTTYPE)

    tempDht.begin();

    dhtSensors[i] = {dhtPins[i], tempDht};
  };
}
void loop() {
    Read_TempHum();
    //getTimeStamp();
    logSDCard();
    delay(5000); //Wait for 5 seconds before writing the next data 
}
// Function to get temperature
void Read_TempHum()
{
  Temperature = dht.readTemperature(); 
  Humidity = dht.readHumidity(); 
  Serial.print("Temperature = ");
  Serial.println(Temperature);
  Serial.print("Humidity = ");
  Serial.println(Humidity);
}
// Function to get date and time from NTPClient
void getTimeStamp() {
  dayStamp = "10";
  timeStamp = "100";
}
// Write the sensor readings on the SD card
void logSDCard() {
  dataMessage =  String(dayStamp) + "," + String(timeStamp) + "," + 
                String(Temperature) + "," + String(Humidity)+ "\r\n";
  Serial.print("Save data: ");
  Serial.println(dataMessage);
  appendFile(SD, "/data.txt", dataMessage.c_str());
}
// Write to the SD card (DON'T MODIFY THIS FUNCTION)
void writeFile(fs::FS &fs, const char * path, const char * message) {
  Serial.printf("Writing file: %s\n", path);
  File file = fs.open(path, FILE_WRITE);
  if(!file) {
    Serial.println("Failed to open file for writing");
    return;
  }
  if(file.print(message)) {
    Serial.println("File written");
  } else {
    Serial.println("Write failed");
  }
  file.close();
}
// Append data to the SD card (DON'T MODIFY THIS FUNCTION)
void appendFile(fs::FS &fs, const char * path, const char * message) {
  Serial.printf("Appending to file: %s\n", path);
  File file = fs.open(path, FILE_APPEND);
  if(!file) {
    Serial.println("Failed to open file for appending");
    return;
  }
  if(file.print(message)) {
    Serial.println("Message appended");
  } else {
    Serial.println("Append failed");
  }
  file.close();
}