#include <SD.h>
#include <Wire.h>
#include <RTClib.h>

RTC_DS3231 rtc;
File dataFile;

const int chipSelect = 10;  // SD card chip select pin
const int primaryLED = 3;
const int secondaryLED = 4;
const int tertiaryLED = 5;

void setup() {
  Serial.begin(9600);

  // Set up LED pins as output
  pinMode(primaryLED, OUTPUT);
  pinMode(secondaryLED, OUTPUT);
  pinMode(tertiaryLED, OUTPUT);

  // Initialize the SD card
  if (!SD.begin(chipSelect)) {
    Serial.println("SD card initialization failed!");
    return;
  }

  // Initialize the RTC
  if (!rtc.begin()) {
    Serial.println("Couldn't find RTC");
    while (1);
  }
  if (rtc.lostPower()) {
    Serial.println("RTC lost power, set the time!");
    rtc.adjust(DateTime(F(__DATE__), F(__TIME__))); // Set to compile time
  }
}

void loop() {
  DateTime now = rtc.now();
  char currentTime[20];
  snprintf(currentTime, sizeof(currentTime), "%02d-%02d-%04d %02d:%02d:%02d",
           now.day(), now.month(), now.year(), now.hour(), now.minute(), now.second());

  // Open the CSV file
  dataFile = SD.open("schedule.csv");
  if (!dataFile) {
    Serial.println("Failed to open schedule file!");
    return;
  }

  // Parse the CSV file line by line
  while (dataFile.available()) {
    String line = dataFile.readStringUntil('\n');
    line.trim();  // Remove any newline or whitespace characters

    // Skip empty lines
    if (line.length() == 0) continue;

    // Parse DateTime and load values from the line
    int comma1 = line.indexOf(',');
    int comma2 = line.indexOf(',', comma1 + 1);
    int comma3 = line.indexOf(',', comma2 + 1);

    String dateTime = line.substring(0, comma1);
    int primaryLoad = line.substring(comma1 + 1, comma2).toInt();
    int secondaryLoad = line.substring(comma2 + 1, comma3).toInt();
    int tertiaryLoad = line.substring(comma3 + 1).toInt();

    // Check if DateTime matches the current time
    if (dateTime.equals(currentTime)) {
      digitalWrite(primaryLED, primaryLoad);
      digitalWrite(secondaryLED, secondaryLoad);
      digitalWrite(tertiaryLED, tertiaryLoad);

      Serial.print("Time: ");
      Serial.print(currentTime);
      Serial.print(" - Primary: ");
      Serial.print(primaryLoad);
      Serial.print(" - Secondary: ");
      Serial.print(secondaryLoad);
      Serial.print(" - Tertiary: ");
      Serial.println(tertiaryLoad);
      break;  // Break once the line for the current time is found
    }
  }

  dataFile.close();  // Close the CSV file

  delay(1000);  // Wait 1 second before checking again
}