#include "FS.h"
#include "SD.h"
#include "SPI.h"
#include <I2S.h>

bool sd_sign = false;  


const char * songs[]={"/banana_audio1_16000.wav", "/banana_audio2_16000.wav", "/banana_audio3_16000.wav", "/banana_audio4_16000.wav", "/banana_audio5_16000.wav", "/banana_audio6_16000.wav"}; 

void setup_audio();
void play_song(const char* filename);

void play_random_song();


void setup_audio(){
   I2S.setAllPins(D2, D3, D1, -1, -1); //SCK, WS, SDOUT, SDIN, MCLK
  I2S.begin(I2S_PHILIPS_MODE, 16000, 16);

  
  
if(!SD.begin(21)){
    Serial.println("Card Mount Failed");
    return;
  }
  uint8_t cardType = SD.cardType();

  // Determine if the type of SD card is available
  if(cardType == CARD_NONE){
    Serial.println("No SD card attached");
    return;
  }

  Serial.print("SD Card Type: ");
  if(cardType == CARD_MMC){
    Serial.println("MMC");
  } else if(cardType == CARD_SD){
    Serial.println("SDSC");
  } else if(cardType == CARD_SDHC){
    Serial.println("SDHC");
  } else {
    Serial.println("UNKNOWN");
  }

  sd_sign = true; // sd initialization check passes

  
  }


void play_song(const char* filename){
   if(sd_sign){
    if(!SD.exists(filename)){
      Serial.println("AHHHH"); delay(1000);}else{
    File file = SD.open(filename, FILE_READ);
    int16_t sample;
  while (file.read((byte *)&sample, 2)) {

//      Serial.println(sample);
I2S.write(sample);
I2S.write(sample);
      
      
    
  }
      }
    
    }
    // try to get rid of noise
    for(int i =0 ; i<10000;i++){
      I2S.write(0);
      }
    
    
    }


void play_random_song(){
  int song_num = random(6);
  Serial.print("playing song #");
  Serial.println(song_num);
  const char * filename= songs[song_num];
  
  play_song(filename);
  
  }