import os
import RPi.GPIO as GPIO
import time
from lib.mqtt import create_client, control_player, create_config, check_current_status, check_current_disc, update_disc
from lib.home_assistant import load_disc, pause_media, play_media_again, set_shuffle, next_track
from dotenv import load_dotenv

load_dotenv()

use_mqtt = os.environ["use_mqtt"].lower() == "true"

if use_mqtt:
    client = create_client()
    create_config(client)

# Debug: Print environment variable
print(f"Using MQTT: {use_mqtt}")

# GPIO button pin setup
BUTTON_PINS = [17, 18, 27, 22]
GPIO.setmode(GPIO.BCM)  # Use BCM numbering

# Set up each button pin as input with internal pull-up resistors
for pin in BUTTON_PINS:
    GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)

# Button Handlers
def handle_button_1():
    if use_mqtt:
        if check_current_status(client) == "PLAY":
            print("Pausing playback via MQTT.")
            control_player(client, "PAUSE")
        else:
            print("Playing media via MQTT.")
            control_player(client, "PLAY")
    else:
        print("Pausing/Playing via Home Assistant.")
        if check_current_status(client) == "PLAY":
            pause_media()
        else:
            play_media_again()

def handle_button_2():
    print("Skipping to the next track.")
    if use_mqtt:
        control_player(client, "SKIP")
        control_player(client, "PLAY")
    else:
        next_track()

def handle_button_3():
    start_time = time.time()
    if use_mqtt:
        disc_data = check_current_disc(client)

        # Wait until the button is released or held for more than 3 seconds
        while GPIO.input(BUTTON_PINS[2]) == GPIO.LOW:
            if time.time() - start_time >= 3:
                print("Button 3 held for 3 seconds! Resetting to RADIO2 via MQTT.")
                update_disc(client, ["ytmusic", disc_data['name'], disc_data['type'], "RESET"])
                control_player(client, "PLAY")
                update_disc(client, ["ytmusic", disc_data['name'], disc_data['type'], disc_data['id']])
                return  # Exit after sending RADIO2

        print("Button 3 pressed briefly! Sending RADIO via MQTT.")
        control_player(client, "RADIO")
    else:
        print("Button 3 functionality not implemented for Home Assistant.")

def handle_button_4():
    print("Toggling shuffle mode.")
    if use_mqtt:
        control_player(client, "SHUFFLE")
        control_player(client, "PLAY")
    else:
        set_shuffle()

# GPIO Callback Handlers
def button_callback(channel):
    if channel == BUTTON_PINS[0]:
        handle_button_1()
    elif channel == BUTTON_PINS[1]:
        handle_button_2()
    elif channel == BUTTON_PINS[2]:
        handle_button_3()
    elif channel == BUTTON_PINS[3]:
        handle_button_4()

# Add event detection for each button press
for pin in BUTTON_PINS:
    GPIO.add_event_detect(pin, GPIO.FALLING, callback=button_callback, bouncetime=200)

try:
    # Keep the script running to detect button presses
    while True:
        time.sleep(1)  # Sleep to reduce CPU usage
except KeyboardInterrupt:
    pass
finally:
    GPIO.cleanup()  # Clean up GPIO on exit