#include "Arduino.h"
#include "DFRobotDFPlayerMini.h"

#define FPSerial Serial1

// Define the pin for the switch I/O pin 26
#define PIN_SWITCH 26

DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);

void setup()
{
  FPSerial.begin(9600);
  Serial.begin(115200);

  // Set the switch pin as input
  pinMode(PIN_SWITCH, INPUT_PULLDOWN);

  Serial.println();
  Serial.println(F("DFRobot DFPlayer Mini Demo"));
  Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));

  if (!myDFPlayer.begin(FPSerial, /*isACK = */ false, /*doReset = */ true))
  { // Use serial to communicate with mp3.
    Serial.println(F("Unable to begin:"));
    Serial.println(F("1.Please recheck the connection!"));
    Serial.println(F("2.Please insert the SD card!"));
    while (true)
    {
      delay(0); // Code to compatible with ESP8266 watch dog.
    }
  }
  Serial.println(F("DFPlayer Mini online."));

  myDFPlayer.volume(30); // Set volume value. From 0 to 30

  delay(1000);
}

void loop()
{
  // Switch status
  static unsigned int switchStatus = 0;

  // Check if the switch is pressed
  if (switchStatus == 0 && digitalRead(PIN_SWITCH) == HIGH)
  {
    Serial.println("Switch pressed");
    // Play next song
    myDFPlayer.next();
    switchStatus = 1;
  }
  else if (switchStatus == 1 && digitalRead(PIN_SWITCH) == LOW)
  {
    Serial.println("Switch released");
    // Play next song
    myDFPlayer.next();
    switchStatus = 0;
  }
  delay(50);
}

void printDetail(uint8_t type, int value)
{
  switch (type)
  {
  case TimeOut:
    Serial.println(F("Time Out!"));
    break;
  case WrongStack:
    Serial.println(F("Stack Wrong!"));
    break;
  case DFPlayerCardInserted:
    Serial.println(F("Card Inserted!"));
    break;
  case DFPlayerCardRemoved:
    Serial.println(F("Card Removed!"));
    break;
  case DFPlayerCardOnline:
    Serial.println(F("Card Online!"));
    break;
  case DFPlayerUSBInserted:
    Serial.println("USB Inserted!");
    break;
  case DFPlayerUSBRemoved:
    Serial.println("USB Removed!");
    break;
  case DFPlayerPlayFinished:
    Serial.print(F("Number:"));
    Serial.print(value);
    Serial.println(F(" Play Finished!"));
    break;
  case DFPlayerError:
    Serial.print(F("DFPlayerError:"));
    switch (value)
    {
    case Busy:
      Serial.println(F("Card not found"));
      break;
    case Sleeping:
      Serial.println(F("Sleeping"));
      break;
    case SerialWrongStack:
      Serial.println(F("Get Wrong Stack"));
      break;
    case CheckSumNotMatch:
      Serial.println(F("Check Sum Not Match"));
      break;
    case FileIndexOut:
      Serial.println(F("File Index Out of Bound"));
      break;
    case FileMismatch:
      Serial.println(F("Cannot Find File"));
      break;
    case Advertise:
      Serial.println(F("In Advertise"));
      break;
    default:
      break;
    }
    break;
  default:
    break;
  }
}