// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi

#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

#define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET     8*3600
#define UTC_OFFSET_DST 0

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(15, 1);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}
int speakerPin = 2;
char notes[] = "cceggCbCag ccdefgagfed eefggabCCDEDCbCbag ee gg CbCagg ee gg CCDDCbC ";
unsigned long beats[] = {2,4,2,4,4,3,1,2,2,4,4,2,4,2,2,2,4,2,2,2,2,4,4,2,4,2,4,4,6,2,4,4,6,2,4,4,2,2,2,2,4,4,2,2,4,2,2,4,3,1,2,2,2,2,4,2,2,4,2,2,2,1,1,4,4,4,4,16,4};
int length = sizeof(notes);
int tempo = 120;


void printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    LCD.setCursor(0, 1);
    LCD.println("Connection Err");
    return;
  }

  LCD.setCursor(8, 0);
  LCD.println(&timeinfo, "%H:%M:%S");

  LCD.setCursor(0, 1);
  LCD.println(&timeinfo, "%Y/%m/%d %Z+8");
}

void setup() {
  Serial.begin(115200);
  pinMode(speakerPin, OUTPUT);
  pinMode(14, OUTPUT);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Connecting to ");
  LCD.setCursor(0, 1);
  LCD.print("WiFi ");

  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    spinner();
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.println("5A9G018");
  LCD.setCursor(0, 1);
  LCD.println("Updating time...");

  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
}

void loop() {
  printLocalTime();
  digitalWrite(14, HIGH);
  delay(125);
  digitalWrite(14, LOW);
  delay(125);
  

  for (int i = 0; i < length; i++) {
 // 如果是空白的話，不撥放音樂
    if (notes[i] == ' ') {
      delay(beats[i] * tempo); // rest
    } else {
  // 呼叫 palyNote() 這個 function，將音符轉換成訊號讓蜂鳴器發聲
      playNote(speakerPin,notes[i], beats[i] * tempo);
    }
    digitalWrite(14, HIGH);
    // 每個音符之間的間隔，這邊設定的長短會有連音 or 段音的效果
    delay(tempo/10);
    digitalWrite(14, LOW);
  }
}

void playNote(int OutputPin, char note, unsigned long duration) {
   // 音符字元與對應的頻率由兩個矩陣表示
  char names[] = { 'c', 'd', 'e', 'f', 'g', 'a', 'b', 'C', 'D', 'E'};
  int tones[] = { 261, 294, 330, 349, 392, 440, 494, 523,  587, 659};
  // 播放音符對應的頻率
  for (int i = 0; i < (sizeof(tones)/sizeof(tones[0])); i++) {
    if (names[i] == note) {
      tone(OutputPin,tones[i], duration);
  //下方的 delay() 及 noTone ()，測試過後一定要有這兩行，整體的撥放出來的東西才不會亂掉，可能是因為 Arduino 送出tone () 頻率後會馬上接著執行下個指令，不會等聲音播完，導致撥出的聲音混合而亂掉
      delay(duration);
      noTone(OutputPin);
    }
  }
  printLocalTime();
}