#include <Wire.h> 
#include <U8g2lib.h>

// Configuration de l'écran OLED en I2C (128x64)
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/U8X8_PIN_NONE);

// Configuration des boutons
const int playPauseButton = 12;
const int nextButton = 14;
const int prevButton = 27;

// Variables pour la gestion de l’état
bool isPlaying = false;
int currentTrack = 1; // Piste actuelle
unsigned long playStartTime = 0;
unsigned long accumulatedTime = 0; // Temps accumulé pour conserver la position de lecture
int trackDuration = 180; // Durée de la piste en secondes (3 minutes)

// Variables pour détection des transitions des boutons
bool playPauseLastState = HIGH;
bool nextLastState = HIGH;
bool prevLastState = HIGH;

// Déclaration des images en format XBM
static const uint8_t image_music_play_bits[] = {0x03,0x00,0x07,0x00,0x19,0x00,0x61,0x00,0x81,0x01,0x01,0x06,0x01,0x18,0x01,0x60,0x01,0x18,0x01,0x06,0x81,0x01,0x61,0x00,0x19,0x00,0x07,0x00,0x03,0x00,0x00,0x00};
static const uint8_t image_download_bits[] = {0x9f,0x0f,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x91,0x08,0x9f,0x0f,0x00,0x00};
static const uint8_t image_ButtonRight_bits[] = {0x01,0x03,0x07,0x0f,0x07,0x03,0x01};
static const uint8_t image_download_1_bits[] = {0xe0,0x03,0xf8,0x0f,0x7c,0x1f,0x7e,0x3e,0x6e,0x3d,0x5f,0x7b,0x3f,0x7d,0x7f,0x7e,0x3f,0x7d,0x5f,0x7b,0x6e,0x3d,0x7e,0x3e,0x7c,0x1f,0xf8,0x0f,0xe0,0x03};
static const uint8_t image_download_2_bits[] = {0x00,0x00,0x00,0xf0,0xff,0x7f,0x08,0x00,0x80,0x08,0xdb,0xb6,0x0e,0xdb,0xb6,0x01,0xdb,0xb6,0x01,0xdb,0xb6,0x01,0xdb,0xb6,0x01,0xdb,0xb6,0x0e,0xdb,0xb6,0x08,0xdb,0xb6,0x08,0x00,0x80,0xf0,0xff,0x7f,0x00,0x00,0x00,0x00,0x00,0x00};
static const uint8_t image_download_3_bits[] = {0xfc,0xff,0xff,0xff,0x7f,0x00,0x10,0x02,0x00,0x00,0x00,0x80,0x00,0x20,0x01,0x00,0x00,0x00,0x18,0x01,0x42,0x01,0x03,0x6c,0xdb,0x24,0x01,0x44,0x01,0x03,0x6c,0xdb,0x24,0x01,0x88,0x01,0x03,0x0c,0x00,0x18,0x81,0x88,0x01,0x00,0x60,0xdb,0x00,0x07,0x89,0x71,0x3b,0x6c,0xdb,0x00,0x09,0x89,0x71,0x3b,0x0c,0x00,0x00,0x09,0x89,0x01,0x00,0x6c,0xdb,0x00,0x07,0x89,0x01,0x03,0x60,0xdb,0x18,0x81,0x88,0x01,0x03,0x00,0x00,0x3c,0x01,0x88,0x01,0xe3,0xbd,0xf7,0x3c,0x01,0x44,0x01,0xe0,0xbd,0xf7,0x18,0x01,0x42,0x02,0x00,0x00,0x00,0x80,0x00,0x20,0xfc,0xff,0xff,0xff,0x7f,0x00,0x10};

// Liste de noms de pistes fictifs
const char* trackNames[] = {
  "Morning Breeze", "Silent Echoes", "Night Sky", 
  "Electric Dreams", "Desert Rose", "Urban Flow",
  "Eternal Spring", "Midnight Vibes", "Golden Hour",
  "Whispering Pines"
};

void setup() {
  u8g2.begin();
  
  // Configuration des boutons
  pinMode(playPauseButton, INPUT_PULLUP);
  pinMode(nextButton, INPUT_PULLUP);
  pinMode(prevButton, INPUT_PULLUP);

  Serial.begin(9600);
}

void simulatePlayTrack(int track) {
  Serial.print("Lecture de la piste ");
  Serial.println(track);
}

void loop() {
  bool playPauseState = digitalRead(playPauseButton);
  bool nextState = digitalRead(nextButton);
  bool prevState = digitalRead(prevButton);

  // Gestion du bouton Play/Pause
  if (playPauseState == LOW && playPauseLastState == HIGH) {
    delay(200); // Débounce
    isPlaying = !isPlaying;
    if (isPlaying) {
      playStartTime = millis(); // Démarrer la lecture
      simulatePlayTrack(currentTrack);
    } else {
      accumulatedTime += millis() - playStartTime; // Ajouter le temps joué au temps accumulé
      Serial.println("Pause");
    }
  }
  playPauseLastState = playPauseState;

  // Gestion du bouton Suivant
  if (nextState == LOW && nextLastState == HIGH) {
    delay(200); // Débounce
    currentTrack = (currentTrack % 10) + 1; // Remise à 1 après la 10ème piste
    simulatePlayTrack(currentTrack);
    isPlaying = true;
    playStartTime = millis();
    accumulatedTime = 0;
  }
  nextLastState = nextState;

  // Gestion du bouton Précédent
  if (prevState == LOW && prevLastState == HIGH) {
    delay(200); // Débounce
    currentTrack = (currentTrack == 1) ? 10 : currentTrack - 1; // Retour à 10 si inférieur à 1
    simulatePlayTrack(currentTrack);
    isPlaying = true;
    playStartTime = millis();
    accumulatedTime = 0;
  }
  prevLastState = prevState;

  // Calcul du temps de lecture
  unsigned long currentMillis = millis();
  int secondsPlayed = isPlaying ? (accumulatedTime + (currentMillis - playStartTime)) / 1000 : accumulatedTime / 1000;
  int minutes = secondsPlayed / 60;
  int seconds = secondsPlayed % 60;

  // Affichage sur l'écran OLED
  u8g2.clearBuffer();
  u8g2.setBitmapMode(1);
  u8g2.setFontMode(1);

  // Affiche l'icône de lecture ou de pause en fonction de l'état
  if (isPlaying) {
    u8g2.drawXBM(9, 39, 15, 16, image_music_play_bits); // Icône de lecture
  } else {
    u8g2.drawXBM(9, 39, 15, 16, image_download_bits); // Icône de pause
  }

  // Affiche le temps de lecture
  char timeString[6];
  sprintf(timeString, "%02d:%02d", minutes, seconds);
  u8g2.setFont(u8g2_font_profont29_tr);
  u8g2.drawStr(40, 62, timeString);

  // Affiche le nom de la piste audio
  u8g2.setFont(u8g2_font_profont10_tr);
  u8g2.drawStr(40, 39, "John Peel Show");

  // Affiche le nom fictif de la chanson
  u8g2.setFont(u8g2_font_profont15_tr);
  u8g2.drawStr(41, 30, trackNames[currentTrack - 1]);

    u8g2.drawXBM(29, 0, 15, 15, image_download_1_bits);
  u8g2.drawXBM(1, 0, 24, 16, image_download_2_bits);
  u8g2.drawXBM(72, 0, 56, 16, image_download_3_bits);

  u8g2.sendBuffer();

  delay(100); // Temps d'attente pour rafraîchissement
}