from machine import Pin, PWM
import time

# ----- CONFIG BUZZER -----
buzzer = PWM(Pin(15))
buzzer.duty_u16(0)

def play(freq, dur):
    if freq == 0:
        buzzer.duty_u16(0)
        time.sleep(dur)
        return
    buzzer.freq(int(freq))
    buzzer.duty_u16(24000)
    time.sleep(dur)
    buzzer.duty_u16(0)
    time.sleep(0.02)


# ----- FRECUENCIAS -----
N = {
    "C4":261.63,"C#4":277.18,"D4":293.66,"D#4":311.13,
    "E4":329.63,"F4":349.23,"F#4":369.99,"G4":392.00,
    "G#4":415.30,"A4":440.00,"A#4":466.16,"B4":493.88,

    "C5":523.25,"D5":587.33,"E5":659.25,"F5":698.46,
    "G5":783.99,"A5":880.00
}

# ----- DURACIONES MUSICALES -----
BPM = 82
BEAT = 60 / BPM

def n(x): return x * BEAT  # negra
def c(x): return (x/2) * BEAT  # corchea
def s(x): return (x/4) * BEAT  # semicorchea


# ----- MELODÍA -----
# intro + verso + estribillo (melodía vocal principal)
melody = [
    # INTRO (piano principal)
    ("C4", c(1)), ("F4", c(1)), ("A4", c(1)), ("G4", c(1)),
    ("F4", c(1)), ("E4", c(1)), ("D4", c(1)), ("C4", c(1)),

    # “Slip inside the eye of your mind”
    ("E4", n(1)), ("D4", n(1)),
    ("D4", c(1)), ("C4", c(1)), ("C4", n(1)),

    # “Don’t you know you might find”
    ("D4", c(1)), ("C4", c(1)), ("E4", c(1)), ("D4", n(1)),

    # “A better place to play”
    ("C4", n(2)), ("A4", c(1)),

    # puente al estribillo
    ("G4", n(1)), ("E4", n(1)), ("F4", n(1)), ("E4", n(1)),
    ("D4", c(1)), ("C4", c(1)), ("D4", c(1)), ("C4", n(2)),

    # ---- ESTRIBILLO ----
    # “So Sally can wait”
    ("C4", c(1)), ("G4", c(1)), ("A4", c(1)), ("E4", c(1)),
    ("F4", n(1)), ("G4", n(1)),

    # “She knows it's too late”
    ("C4", c(1)), ("A4", c(1)), ("G4", n(1)),
    ("E4", n(1)), ("D4", c(1)), ("C4", c(1)),

    # “As we're walking on by”
    ("G4", c(1)), ("A4", c(1)), ("G4", n(1)),
    ("F4", c(1)), ("E4", c(1)), ("D4", n(1)),

    # “Her soul slides away”
    ("C4", n(2)), ("G4", c(1)),

    # “But don't look back in anger…”
    ("A4", c(1)), ("G4", n(1)),
    ("F4", n(1)), ("E4", n(1)), ("D4", n(1)),
    ("C4", n(2)),
]

# ----- REPRODUCCIÓN -----
try:
    for note, dur in melody:
        play(N.get(note, 0), dur)

finally:
    buzzer.deinit()