import RPi.GPIO as GPIO
import time
from datetime import datetime
import subprocess
import sys
from slovak_datetime_formatter import get_datetime_as_slovak_sentence

BUTTON_TIMEOUT = 30  # pressing and holding the button longer then e.g. 2 seconds terminates playing
PIN = 17  # listen to changes on this GPIO
GPIO.setmode(GPIO.BCM)  # use BCM pin layout
GPIO.setwarnings(False)


def setup_pin():
    GPIO.setup(PIN, GPIO.IN, pull_up_down=GPIO.PUD_UP)

def terminate_playing(proc):
    print("Terminating playing...")
    proc.terminate()
    proc.wait(timeout=5)
    print("Terminated")

def play_presny_cas():
    print("Playing presny_cas.wav")
    proc = subprocess.Popen(["aplay", "presny_cas.wav"])
    wait_for_button_release_or_timeout(PIN, BUTTON_TIMEOUT)
    print("GPIO went HIGH - terminating playing")
    terminate_playing(proc)

def play_beep():
    print("Playing beep.wav")
    subprocess.call(["aplay", "beep.wav"])

def generate_presny_cas():
    text = get_datetime_as_slovak_sentence(datetime.now())
    print(f"Generating presny_cas.wav for '{text}'")
    subprocess.call(
        [
            "curl", "--silent", "--get", "--data-urlencode", f"text={text}", "https://tts.virtonline.eu/api/tts", "--output", "presny_cas.wav",
        ]
    )
    print("Generated presny_cas.wav")

def wait_for_button_release_or_timeout(pin, timeout):
    timeout_start = time.time()
    while time.time() < timeout_start + timeout:
        if GPIO.input(pin) == GPIO.HIGH:
            break
        time.sleep(0.05)


def handle_pin(pin):
    print(f"GPIO {pin} LOW - event triggered")
    generate_presny_cas()
    play_presny_cas()

try:
    setup_pin()
    play_beep()
    play_beep()
    GPIO.add_event_detect(PIN, GPIO.FALLING, callback=handle_pin, bouncetime=1000)
    print(f"Waiting for the GPIO {PIN} to go LOW...")
    while True:
        time.sleep(0.01)
except Exception:
    print("Cought exception...")
    sys.exit()
finally:
    GPIO.cleanup()