import gi # type: ignore
gi.require_version('Gst','1.0')
from gi.repository import Gst # type: ignore
import sys
import select
import time
import os
import paho.mqtt.client as mqtt # type: ignore
import re

Gst.init(None)

mqtt = mqtt.Client()
mqtt.connect("10.40.0.2", 1883)

def play_song(Song_path):
    #GStreamer Player
    pipeline = Gst.parse_launch(
        f'filesrc location="{Song_path}" ! \
            mpegaudioparse ! avdec_mp3 ! \
            queue ! audioconvert ! \
            queue ! audioresample ! \
            audio/x-raw,rate=44100,channels=2 ! \
            rtpL16pay ! \
            udpsink host=10.40.0.100 port=5004 '
    )

    pipeline.set_state(Gst.State.PLAYING)

    title = os.path.basename(Song_path)
    title = os.path.splitext(title)[0]
    title = re.sub(r'\s*\[[^\]]+\]$', '', title)
    print("🎵 Now Playing:", title)
    mqtt.publish("player/current", title)

    bus = pipeline.get_bus()
    print("Press 'q' then Enter to stop early.")

    user_input = ""
    status = "unknown"

    while True:
     # Check for messages from GStreamer
        msg = bus.timed_pop_filtered(0, Gst.MessageType.ERROR | Gst.MessageType.EOS)
        if msg:
            if msg.type == Gst.MessageType.EOS:
                print("✅ Song finished.")
                break
            elif msg.type == Gst.MessageType.ERROR:
                err, debug = msg.parse_error()
                print("❌ Error:", err)
                status = "error"
                break

     # Check if user typed "q"
        user_input = None
    
        if sys.stdin in select.select([sys.stdin], [], [], 0)[0]:
            user_input = sys.stdin.readline().strip()
        if user_input:
            command = user_input.lower()

            if command == "q":
                print("🛑 Quitting early.")
                status = "quit"
                break
           
            elif command == "skip":
                print("⏩ Skipping song from controller.")
                status = "skip"
                break
            
            #elif command == "pause":
                #print("⏸ Pausing playback.")           NOTE: Left in for the "Just in case" scenario. 
                #pipeline.set_state(Gst.State.PAUSED)   NOTE: Audio "pausing" is handled by AHM fading to 0%
                
            #elif command == "play":
                #print("▶️ Resuming playback.")          NOTE: Left in for the "Just in case" scenario. 
                #pipeline.set_state(Gst.State.PLAYING)  NOTE: Audio "pausing" is handled by AHM fading to 0%
   
    time.sleep(0.1)

    if not status or status == "unknown":
        status = "Finished"

    pipeline.set_state(Gst.State.NULL)
    pipeline.get_state(Gst.CLOCK_TIME_NONE)
    del pipeline
    return status