import json
import os
import logging
import telebot
from telebot import types
from db import *
import subprocess
import time
from threading import Lock

# Configure logging
logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s', level=logging.INFO)
logger = logging.getLogger(__name__)

# Bot token from @BotFather
CONFIG = read()
BOT_TOKEN = CONFIG['api_token']

bot = telebot.TeleBot(BOT_TOKEN)

# Global lock to enforce delay between operations
operation_lock = Lock()

def delayed_operation():
    """Enforce a 1-second delay between any two operations."""
    with operation_lock:
        time.sleep(1)

@bot.message_handler(func=lambda message: 'music.youtube.com/watch?v=' in message.text)
def handle_youtube_music_link(message):
    """Handle YouTube Music links in messages"""
    user = message.from_user
    text = message.text

    # Extract all YouTube Music URLs from the message
    urls = [word for word in text.split() if 'music.youtube.com/watch?v=' in word]

    for url in urls:
        try:
            # Notify user that download has started
            progress_msg = bot.reply_to(message, "🎵 Fetching music metadata...")

            # Delay before fetching metadata
            delayed_operation()

            # Step 1: Get metadata using yt-dlp in simulate mode
            result = subprocess.run(
                ["yt-dlp", "--print-json", "--skip-download", "--restrict-filenames", url],
                capture_output=True,
                text=True
            )

            if result.returncode != 0:
                logger.error(f"yt-dlp metadata fetch error: {result.stderr}")
                bot.reply_to(message, "❌ Failed to fetch music info. Please try again.")
                continue

            metadata = json.loads(result.stdout)
            title = metadata.get("title", "Unknown Title")
            uploader = metadata.get("uploader", "Unknown Artist")

            # Update message
            bot.edit_message_text(
                chat_id=progress_msg.chat.id,
                message_id=progress_msg.message_id,
                text="🎵 Downloading your music..."
            )

            # Delay before downloading
            delayed_operation()

            # Step 2: Download the audio
            output_template = f"{user.id}_%(title)s.%(ext)s"
            download_result = subprocess.run(
                [
                    "yt-dlp",
                    "-x", "--audio-format", "mp3", "--audio-quality", "0",
                    "--output", output_template,
                    "--restrict-filenames",
                    url
                ],
                capture_output=True,
                text=True
            )

            if download_result.returncode != 0:
                logger.error(f"yt-dlp download error: {download_result.stderr}")
                bot.reply_to(message, "❌ Failed to download audio. Please check the link and try again.")
                continue

            # Step 3: Find the downloaded file
            downloaded_files = [f for f in os.listdir('.') if f.startswith(str(user.id)) and f.endswith('.mp3')]

            if not downloaded_files:
                bot.reply_to(message, "❌ Failed to download audio. Please try again.")
                return

            audio_file = downloaded_files[0]

            # Step 4: Send audio with metadata as caption
            with open(audio_file, 'rb') as audio:
                bot.send_audio(
                    chat_id=message.chat.id,
                    audio=audio,
                    caption=f"🎧 {title}\n👤 {uploader}",
                    title=title,
                    performer=uploader,
                    reply_to_message_id=message.message_id
                )

            # Delete progress message
            bot.delete_message(message.chat.id, progress_msg.message_id)

            # Clean up downloaded file
            os.remove(audio_file)
            logger.info(f"Sent audio to user {user.first_name} (@{user.username})")

        except Exception as e:
            logger.error(f"Error processing request: {e}")
            bot.reply_to(message, "❌ An error occurred while processing your request. Please try again later.")

@bot.message_handler(commands=['start', 'help'])
def send_welcome(message):
    """Send welcome message"""
    bot.reply_to(message, 
        "🎵 YouTube Music Downloader Bot\n\n"
        "Send me a link from music.youtube.com and I'll download the audio for you!\n\n"
        "Example: https://music.youtube.com/watch?v=dQw4w9WgXcQ\n\n"
        "Source code: https://gitea.del.pw/justuser-31/just_ytmusic_downloader",
        disable_web_page_preview=True
    )

# # Handler for when bot is added to a group
# @bot.my_chat_member_handler()
# def my_chat_member_handler(message: types.ChatMemberUpdated):
    # """
    # Triggered when the bot's membership status changes in a chat.
    # If added to a group but is not admin, notify that it needs admin rights.
    # """
    # new_status = message.new_chat_member.status
    # chat_type = message.chat.type
# 
    # # Only respond if added to a group or supergroup
    # if chat_type in ["group", "supergroup"] and new_status == "member":
        # # Check if bot is admin
        # try:
            # bot_member = bot.get_chat_member(message.chat.id, bot.get_me().id)
            # if not bot_member.status == "administrator":
                # bot.send_message(
                    # chat_id=message.chat.id,
                    # text="⚠️ This bot must be an administrator in the group to work properly.",
                    # disable_notification=True
                # )
        # except Exception as e:
            # logger.warning(f"Could not check admin status: {e}")

if __name__ == '__main__':
    logger.info("Bot is running...")
    bot.infinity_polling()