#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>


/* SdWav1 : sample voix           |
 * SdWav2 : sample attente        |-> mix1 -> Lout & RMS1
 * 
 * SdWav3 : sample ambiance       -> mix2 -> Rout  & RMS2
 */
// GUItool: begin automatically generated code
AudioPlaySdWav           LoopPlayer;     //xy=152,429   LOOP
AudioPlaySdWav           PresencePlayer;     //xy=153,217   PRESENCE
AudioPlaySdWav           WaitPlayer;     //xy=155,307   WAIT
AudioMixer4              mixer1;         //xy=572,215
AudioMixer4              mixer2;         //xy=579,344
AudioAnalyzeRMS          rms1;           //xy=875,315
AudioOutputI2S           i2s1;           //xy=876,225
AudioAnalyzeRMS          rms2;           //xy=876,365
AudioConnection          patchCord1(LoopPlayer, 0, mixer2, 0);
AudioConnection          patchCord2(PresencePlayer, 0, mixer1, 0);
AudioConnection          patchCord3(WaitPlayer, 0, mixer1, 1);
AudioConnection          patchCord4(mixer1, 0, i2s1, 0);
AudioConnection          patchCord5(mixer1, rms1);
AudioConnection          patchCord6(mixer2, 0, i2s1, 1);
AudioConnection          patchCord7(mixer2, rms2);
AudioControlSGTL5000     sgtl5000_1;     //xy=573,537
// GUItool: end automatically generated code

#define LOOP_WAV "LOOP.WAV"
#define PRESENCE_WAV "PRESENCE.WAV"
#define WAIT_WAV "PRESENCE.WAV"

int WAIT_TIME=30000 ;

bool presence ;
uint32_t LastPresence ;
 
// Use these with the Teensy Audio Shield
#define SDCARD_CS_PIN    10
#define SDCARD_MOSI_PIN  7
#define SDCARD_SCK_PIN   14

void ESPSerial(){
   // Send bytes from ESP8266 -> Teensy to Computer
   bool printLine ;
    while ( Serial1.available() ) {
        Serial.write( Serial1.read() );
        printLine = 1 ;
    }
//    if (printLine) {Serial.println("");}
    printLine = 0;
    // Send bytes from Computer -> Teensy back to ESP8266
    while ( Serial.available() ) {
        Serial1.write( Serial.read() );
    }
}

void setup() {
  
  Serial.begin(115200);
  Serial1.begin(115200);
  //LDR digital inputs
  pinMode(16, INPUT);
  pinMode(20,INPUT);
  
  AudioMemory(16);
  sgtl5000_1.enable();
  sgtl5000_1.lineOutLevel(13);  // set output to 3.16 Vpp
  sgtl5000_1.volume(1); //set volume to maximum

  SPI.setMOSI(SDCARD_MOSI_PIN);
  SPI.setSCK(SDCARD_SCK_PIN);
  if (!(SD.begin(SDCARD_CS_PIN))) {
    // stop here, but print a message repetitively
    while (1) {
      Serial.println("Unable to access the SD card");
      delay(500);
    }
  }

  Serial1.println("AT+GMR");
  delay(2000);
  //while (!Serial1.available()) {};
  ESPSerial();
  Serial.println("");
  Serial.println("");
  delay(00);
  
  
}
//
void playFile(const char *filename)
{
  Serial.print("Playing file: ");
  Serial.println(filename);
  PresencePlayer.play(filename);
  // A brief delay for the library read WAV info
  delay(5);

}

void printLDR(){
  
  Serial.print(analogRead(A3));
  Serial.print("   ");
  Serial.print(digitalRead(16));
  Serial.print("   ");
  Serial.print(analogRead(A7));
  Serial.print("   ");
  Serial.print(digitalRead(20));
  Serial.println();
}

bool checkPresence(int Pin1, int Pin2) {
  bool isPresent = digitalRead(Pin2); //|| digitalRead(Pin2);
  return isPresent ;
}
void loop() {
  
  // LOOP FILE
  if (!LoopPlayer.isPlaying()) {
    Serial.println("Playing LOOP file");
    LoopPlayer.play(LOOP_WAV);
    // A brief delay for the library read WAV info
    delay(10); 
  }

  // PRESENCE FILE
  presence = checkPresence(16, 20);
  //printLDR();
  //Serial.println(presence);

  //PRESENCE DETECTED
  if (presence ) { 
    LastPresence = millis() ; 
    
    if (!PresencePlayer.isPlaying()) {
      //stop WAIT_WAV if playing
      if (WaitPlayer.isPlaying()) {
          //fade out WaitPlayer
          Serial.println("Fade out Wait file");
          for (float fadeRamp ; fadeRamp < 100 ; fadeRamp++ ) {
            mixer1.gain(1, 1.0 - fadeRamp/100) ;
          }
          WaitPlayer.stop() ;
          mixer1.gain (1, 1.0); // set volume for next play
          delay(2000) ; 
        
      }
      PresencePlayer.play(PRESENCE_WAV) ;
      delay(15);
      Serial.println("Playing presence file");
    }   
    
    // if presence and playing, don't do anything
  }
  else if (!presence ) {
    
    if (PresencePlayer.isPlaying()) {
      //what if presence gone while playing ?
    }
    if ( (millis() - LastPresence > WAIT_TIME) && !WaitPlayer.isPlaying() && !PresencePlayer.isPlaying()) {
      WaitPlayer.play(WAIT_WAV);
      Serial.println("Playing wait file");
      delay(10);
    }
  }

  ESPSerial();
  delay(100);
}