//Student name: NGAN Hoi Sing
//Class: EG524403-1A
//Student number: 230292338

#define ARRAY_SIZE 1200 //defines a constant ARRAY_SIZE with a value of 1200.

char inputData[ARRAY_SIZE];
int dataIndex = 0; //index or position in the inputData array.
bool inputExceeded = false; //indicate whether the input data has exceeded the capacity of the inputData array.

void setup() {
  Serial.begin(9600);
  Serial.println("Please input:"); //Set the index what you need to check
}

void loop() {
  if (Serial.available()) {
    char receivedChar = Serial.read();

    // Check if the received character is a newline or carriage return
    if (receivedChar == '\n' || receivedChar == '\r') {
      // Null-terminate the input string
      inputData[dataIndex] = '\0';

      // Calculate the length of the input string in bytes
      int inputLength = dataIndex + 1;

      // Display the input string and its length if it doesn't exceed 1200 bytes
      if (!inputExceeded) {
        Serial.print("Size of input data = ");
        Serial.print(inputLength);
        Serial.println(" bytes");
        Serial.println(inputData);

      } else {
        //Serial.println("Input exceeds 1200 bytes. Ignoring input.");
          Serial.print("Size of input data = ");
          Serial.print(inputLength);
          Serial.println(" bytes");
        //store only the first 1200 characters of data and ignore all others.
        for (int j=0; j < 1200; j++) 

         {Serial.print(inputData[j]);} Serial.println();
      }

      // Reset the data index and input exceeded flag to prepare for the next input
      dataIndex = 0;
      inputExceeded = false;

      // Display "Please input again"
      Serial.println();
      Serial.println();
      Serial.println("Please input again:");
    } else {
      // Store the received character in the inputData array if it doesn't exceed 1200 bytes
      if (dataIndex < ARRAY_SIZE - 1 && !inputExceeded) {
        inputData[dataIndex] = receivedChar;
        dataIndex++;

        // Check if the input has exceeded 1200 bytes
        if (dataIndex >= ARRAY_SIZE - 1) {
          inputExceeded = true;
        }
      }
    }
  }
}