#include <SD.h>
#include <TMRpcm.h>

#define SD_ChipSelectPin 10
#define SDCARD_SS_PIN 10
#define led 13
#define button 7

TMRpcm audio;
String fileNames[] = {"message1.wav", "45min.wav", "30min.wav", "15min.wav", "10min.wav", "5min.wav", "1min.wav"}; // list of message file names
int messageTimes[] = {0, 45*60, 30*60, 15*60, 10*60, 5*60, 60}; // message times in seconds
int numMessages = sizeof(messageTimes)/sizeof(messageTimes[0]); // number of messages
unsigned long startTime = 0; // time the button was last pressed
int lastMessageIndex = 0; // index of the last played message

void setup() {
  pinMode(led, OUTPUT);
  pinMode(button, INPUT_PULLUP);

  Serial.begin(9600);
  if (!SD.begin(SD_ChipSelectPin)) {
    Serial.println("SD fail");
    return;
  }
  Serial.println("SD OK");
  audio.speakerPin = 9;
}

void loop() {
  if (digitalRead(button) == LOW) {
    digitalWrite(led, HIGH);
    if (startTime == 0) { // if this is the first button press, start the timer and play the first message
      audio.play(fileNames[0]);
      lastMessageIndex = 0;
      startTime = millis();
    }
    unsigned long elapsedTime = (millis() - startTime) / 1000; // elapsed time in seconds
    int nextMessageIndex = -1;
    for (int i = 1; i < numMessages; i++) { // start from i=1 to skip the first message
      if (elapsedTime >= messageTimes[i] && i > lastMessageIndex) {
        nextMessageIndex = i;
      }
    }
    if (nextMessageIndex != -1) { // if there's a new message to play, play it
      audio.play(fileNames[nextMessageIndex]);
      lastMessageIndex = nextMessageIndex;
    }
    digitalWrite(led, LOW);
  }
}