xtream2m3u/run.py

import fnmatch
import ipaddress
import json
import logging
import os
import re
import socket
import time
import urllib.parse
import argparse
from concurrent.futures import ThreadPoolExecutor, as_completed

import dns.resolver
import requests
from fake_useragent import UserAgent
from flask import Flask, Response, jsonify, request, send_from_directory

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

app = Flask(__name__)


@app.route("/")
def serve_frontend():
    """Serve the frontend index.html file"""
    return send_from_directory("frontend", "index.html")


@app.route("/assets/<path:filename>")
def serve_assets(filename):
    """Serve assets from the docs/assets directory"""
    try:
        return send_from_directory("docs/assets", filename)
    except:
        return "Asset not found", 404


@app.route("/<path:filename>")
def serve_static_files(filename):
    """Serve static files from the frontend directory"""
    # Don't serve API routes through static file handler
    api_routes = ["m3u", "xmltv", "categories", "image-proxy", "stream-proxy", "assets"]
    if filename.split("/")[0] in api_routes:
        return "Not found", 404

    # Only serve files that exist in the frontend directory
    try:
        return send_from_directory("frontend", filename)
    except:
        # If file doesn't exist in frontend, return 404
        return "File not found", 404


# Get default proxy URL from environment variable
DEFAULT_PROXY_URL = os.environ.get("PROXY_URL")


# Set up custom DNS resolver
def setup_custom_dns():
    """Configure a custom DNS resolver using reliable DNS services"""
    dns_servers = ["1.1.1.1", "1.0.0.1", "8.8.8.8", "8.8.4.4", "9.9.9.9"]

    custom_resolver = dns.resolver.Resolver()
    custom_resolver.nameservers = dns_servers

    original_getaddrinfo = socket.getaddrinfo

    def new_getaddrinfo(host, port, family=0, type=0, proto=0, flags=0):
        if host:
            try:
                # Skip DNS resolution for IP addresses
                try:
                    ipaddress.ip_address(host)
                    # If we get here, the host is already an IP address
                    logger.debug(f"Host is already an IP address: {host}, skipping DNS resolution")
                except ValueError:
                    # Not an IP address, so use DNS resolution
                    answers = custom_resolver.resolve(host)
                    host = str(answers[0])
                    logger.debug(f"Custom DNS resolved {host}")
            except Exception as e:
                logger.info(f"Custom DNS resolution failed for {host}: {e}, falling back to system DNS")
        return original_getaddrinfo(host, port, family, type, proto, flags)

    socket.getaddrinfo = new_getaddrinfo
    logger.info("Custom DNS resolver set up")


# Initialize DNS resolver
setup_custom_dns()


# No persistent connections - fresh connection for each request to avoid stale connection issues

# Common request function for API endpoints
def fetch_api_data(url, timeout=10):
    """Make a request to an API endpoint"""
    ua = UserAgent()
    headers = {
        "User-Agent": ua.chrome,
        "Accept": "application/json,text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
        "Accept-Language": "en-US,en;q=0.5",
        "Connection": "close",
        "Accept-Encoding": "gzip, deflate",
    }

    try:
        hostname = urllib.parse.urlparse(url).netloc.split(":")[0]
        logger.info(f"Making request to host: {hostname}")

        # Use fresh connection for each request to avoid stale connection issues
        response = requests.get(url, headers=headers, timeout=timeout, stream=True)
        response.raise_for_status()

        # For large responses, use streaming JSON parsing
        try:
            # Check content length to decide parsing strategy
            content_length = response.headers.get('Content-Length')
            if content_length and int(content_length) > 10_000_000:  # > 10MB
                logger.info(f"Large response detected ({content_length} bytes), using optimized parsing")

            # Stream the JSON content for better memory efficiency
            response.encoding = 'utf-8'  # Ensure proper encoding
            return response.json()
        except json.JSONDecodeError:
            # Fallback to text for non-JSON responses
            return response.text

    except requests.exceptions.SSLError:
        return {"error": "SSL Error", "details": "Failed to verify SSL certificate"}, 503
    except requests.exceptions.RequestException as e:
        logger.error(f"RequestException: {e}")
        return {"error": "Request Exception", "details": str(e)}, 503


def stream_request(url, headers=None, timeout=30):
    """Make a streaming request that doesn't buffer the full response"""
    if not headers:
        headers = {
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36",
            "Connection": "keep-alive",
        }

    # Use longer timeout for streams and set both connect and read timeouts
    return requests.get(url, stream=True, headers=headers, timeout=(10, timeout))


def encode_url(url):
    """Safely encode a URL for use in proxy endpoints"""
    return urllib.parse.quote(url, safe="") if url else ""


def generate_streaming_response(response, content_type=None):
    """Generate a streaming response with appropriate headers"""
    if not content_type:
        content_type = response.headers.get("Content-Type", "application/octet-stream")

    def generate():
        try:
            bytes_sent = 0
            for chunk in response.iter_content(chunk_size=8192):
                if chunk:
                    bytes_sent += len(chunk)
                    yield chunk
            logger.info(f"Stream completed, sent {bytes_sent} bytes")
        except requests.exceptions.ChunkedEncodingError as e:
            # Chunked encoding error from upstream - log and stop gracefully
            logger.warning(f"Upstream chunked encoding error after {bytes_sent} bytes: {str(e)}")
            # Don't raise - just stop yielding to close stream gracefully
        except requests.exceptions.ConnectionError as e:
            # Connection error (reset, timeout, etc.) - log and stop gracefully
            logger.warning(f"Connection error after {bytes_sent} bytes: {str(e)}")
            # Don't raise - just stop yielding to close stream gracefully
        except Exception as e:
            logger.error(f"Streaming error after {bytes_sent} bytes: {str(e)}")
            # Don't raise exceptions in generators after headers are sent!
            # Raising here causes Flask to inject "HTTP/1.1 500" into the chunked body,
        finally:
            # Always close the upstream response to free resources
            try:
                response.close()
            except:
                pass

    headers = {
        "Access-Control-Allow-Origin": "*",
        "Content-Type": content_type,
    }

    # Add content length if available and not using chunked transfer
    if "Content-Length" in response.headers and "Transfer-Encoding" not in response.headers:
        headers["Content-Length"] = response.headers["Content-Length"]
    else:
        headers["Transfer-Encoding"] = "chunked"

    return Response(generate(), mimetype=content_type, headers=headers, direct_passthrough=True)


@app.route("/image-proxy/<path:image_url>")
def proxy_image(image_url):
    """Proxy endpoint for images to avoid CORS issues"""
    try:
        original_url = urllib.parse.unquote(image_url)
        logger.info(f"Image proxy request for: {original_url}")

        response = requests.get(original_url, stream=True, timeout=10)
        response.raise_for_status()

        content_type = response.headers.get("Content-Type", "")

        if not content_type.startswith("image/"):
            logger.error(f"Invalid content type for image: {content_type}")
            return Response("Invalid image type", status=415)

        return generate_streaming_response(response, content_type)
    except requests.Timeout:
        return Response("Image fetch timeout", status=504)
    except requests.HTTPError as e:
        return Response(f"Failed to fetch image: {str(e)}", status=e.response.status_code)
    except Exception as e:
        logger.error(f"Image proxy error: {str(e)}")
        return Response("Failed to process image", status=500)


@app.route("/stream-proxy/<path:stream_url>")
def proxy_stream(stream_url):
    """Proxy endpoint for streams"""
    try:
        original_url = urllib.parse.unquote(stream_url)
        logger.info(f"Stream proxy request for: {original_url}")

        response = stream_request(original_url, timeout=60)  # Longer timeout for live streams
        response.raise_for_status()

        # Determine content type
        content_type = response.headers.get("Content-Type")
        if not content_type:
            if original_url.endswith(".ts"):
                content_type = "video/MP2T"
            elif original_url.endswith(".m3u8"):
                content_type = "application/vnd.apple.mpegurl"
            else:
                content_type = "application/octet-stream"

        logger.info(f"Using content type: {content_type}")
        return generate_streaming_response(response, content_type)
    except requests.Timeout:
        logger.error(f"Timeout connecting to stream: {original_url}")
        return Response("Stream timeout", status=504)
    except requests.HTTPError as e:
        logger.error(f"HTTP error fetching stream: {e.response.status_code} - {original_url}")
        return Response(f"Failed to fetch stream: {str(e)}", status=e.response.status_code)
    except Exception as e:
        logger.error(f"Stream proxy error: {str(e)} - {original_url}")
        return Response("Failed to process stream", status=500)


def parse_group_list(group_string):
    """Parse a comma-separated string into a list of trimmed strings"""
    return [group.strip() for group in group_string.split(",")] if group_string else []


def group_matches(group_title, pattern):
    """Check if a group title matches a pattern, supporting wildcards and exact matching"""
    # Convert to lowercase for case-insensitive matching
    group_lower = group_title.lower()
    pattern_lower = pattern.lower()

    # Handle spaces in pattern
    if " " in pattern_lower:
        # For patterns with spaces, split and check each part
        pattern_parts = pattern_lower.split()
        group_parts = group_lower.split()

        # If pattern has more parts than group, can't match
        if len(pattern_parts) > len(group_parts):
            return False

        # Check each part of the pattern against group parts
        for i, part in enumerate(pattern_parts):
            if i >= len(group_parts):
                return False
            if "*" in part or "?" in part:
                if not fnmatch.fnmatch(group_parts[i], part):
                    return False
            else:
                if part not in group_parts[i]:
                    return False
        return True

    # Check for wildcard patterns
    if "*" in pattern_lower or "?" in pattern_lower:
        return fnmatch.fnmatch(group_lower, pattern_lower)
    else:
        # Simple substring match for non-wildcard patterns
        return pattern_lower in group_lower


def get_required_params():
    """Get and validate the required parameters from the request (supports both GET and POST)"""
    # Handle both GET and POST requests
    if request.method == "POST":
        data = request.get_json() or {}
        url = data.get("url")
        username = data.get("username")
        password = data.get("password")
        proxy_url = data.get("proxy_url", DEFAULT_PROXY_URL) or request.host_url.rstrip("/")
    else:
        url = request.args.get("url")
        username = request.args.get("username")
        password = request.args.get("password")
        proxy_url = request.args.get("proxy_url", DEFAULT_PROXY_URL) or request.host_url.rstrip("/")

    if not url or not username or not password:
        return (
            None,
            None,
            None,
            None,
            jsonify({"error": "Missing Parameters", "details": "Required parameters: url, username, and password"}),
            400
        )

    return url, username, password, proxy_url, None, None


def validate_xtream_credentials(url, username, password):
    """Validate the Xtream API credentials"""
    api_url = f"{url}/player_api.php?username={username}&password={password}"
    data = fetch_api_data(api_url)

    if isinstance(data, tuple):  # Error response
        return None, data[0], data[1]

    if "user_info" not in data or "server_info" not in data:
        return (
            None,
            json.dumps(
                {
                    "error": "Invalid Response",
                    "details": "Server response missing required data (user_info or server_info)",
                }
            ),
            400,
        )

    return data, None, None


def fetch_api_endpoint(url_info):
    """Fetch a single API endpoint - used for concurrent requests"""
    url, name, timeout = url_info
    try:
        logger.info(f"🚀 Fetching {name}...")
        start_time = time.time()
        data = fetch_api_data(url, timeout=timeout)
        end_time = time.time()

        if isinstance(data, list):
            logger.info(f"✅ Completed {name} in {end_time-start_time:.1f}s - got {len(data)} items")
        else:
            logger.info(f"✅ Completed {name} in {end_time-start_time:.1f}s")
        return name, data
    except Exception as e:
        logger.warning(f"❌ Failed to fetch {name}: {e}")
        return name, None

def fetch_categories_and_channels(url, username, password, include_vod=False):
    """Fetch categories and channels from the Xtream API using concurrent requests"""
    all_categories = []
    all_streams = []

    try:
        # Prepare all API endpoints to fetch concurrently
        api_endpoints = [
            (f"{url}/player_api.php?username={username}&password={password}&action=get_live_categories",
             "live_categories", 60),
            (f"{url}/player_api.php?username={username}&password={password}&action=get_live_streams",
             "live_streams", 180),
        ]

        # Add VOD endpoints if requested (WARNING: This will be much slower!)
        if include_vod:
            logger.warning("⚠️  Including VOD content - this will take significantly longer!")
            logger.info("💡 For faster loading, use the API without include_vod=true")

            # Only add the most essential VOD endpoints - skip the massive streams for categories-only requests
            api_endpoints.extend([
                (f"{url}/player_api.php?username={username}&password={password}&action=get_vod_categories",
                 "vod_categories", 60),
                (f"{url}/player_api.php?username={username}&password={password}&action=get_series_categories",
                 "series_categories", 60),
            ])

            # Only fetch the massive stream lists if explicitly needed for M3U generation
            vod_for_m3u = request.endpoint == 'generate_m3u'
            if vod_for_m3u:
                logger.warning("🐌 Fetching massive VOD/Series streams for M3U generation...")
                api_endpoints.extend([
                    (f"{url}/player_api.php?username={username}&password={password}&action=get_vod_streams",
                     "vod_streams", 240),
                    (f"{url}/player_api.php?username={username}&password={password}&action=get_series",
                     "series", 240),
                ])
            else:
                logger.info("⚡ Skipping massive VOD streams for categories-only request")

        # Fetch all endpoints concurrently using ThreadPoolExecutor
        logger.info(f"Starting concurrent fetch of {len(api_endpoints)} API endpoints...")
        results = {}

        with ThreadPoolExecutor(max_workers=10) as executor:  # Increased workers for better concurrency
            # Submit all API calls
            future_to_name = {executor.submit(fetch_api_endpoint, endpoint): endpoint[1]
                             for endpoint in api_endpoints}

            # Collect results as they complete
            for future in as_completed(future_to_name):
                name, data = future.result()
                results[name] = data

        logger.info("All concurrent API calls completed!")

        # Process live categories and streams (required)
        live_categories = results.get("live_categories")
        live_streams = results.get("live_streams")

        if isinstance(live_categories, tuple):  # Error response
            return None, None, live_categories[0], live_categories[1]
        if isinstance(live_streams, tuple):  # Error response
            return None, None, live_streams[0], live_streams[1]

        if not isinstance(live_categories, list) or not isinstance(live_streams, list):
            return (
                None,
                None,
                json.dumps(
                    {
                        "error": "Invalid Data Format",
                        "details": "Live categories or streams data is not in the expected format",
                    }
                ),
                500,
            )

        # Optimized data processing - batch operations for massive datasets
        logger.info("Processing live content...")

        # Batch set content_type for live content
        if live_categories:
            for category in live_categories:
                category["content_type"] = "live"
            all_categories.extend(live_categories)

        if live_streams:
            for stream in live_streams:
                stream["content_type"] = "live"
            all_streams.extend(live_streams)

        logger.info(f"✅ Added {len(live_categories)} live categories and {len(live_streams)} live streams")

        # Process VOD content if requested and available
        if include_vod:
            logger.info("Processing VOD content...")

            # Process VOD categories
            vod_categories = results.get("vod_categories")
            if isinstance(vod_categories, list) and vod_categories:
                for category in vod_categories:
                    category["content_type"] = "vod"
                all_categories.extend(vod_categories)
                logger.info(f"✅ Added {len(vod_categories)} VOD categories")

            # Process series categories first (lightweight)
            series_categories = results.get("series_categories")
            if isinstance(series_categories, list) and series_categories:
                for category in series_categories:
                    category["content_type"] = "series"
                all_categories.extend(series_categories)
                logger.info(f"✅ Added {len(series_categories)} series categories")

            # Only process massive stream lists if they were actually fetched
            vod_streams = results.get("vod_streams")
            if isinstance(vod_streams, list) and vod_streams:
                logger.info(f"🔥 Processing {len(vod_streams)} VOD streams (this is the slow part)...")

                # Batch process for better performance
                batch_size = 5000
                for i in range(0, len(vod_streams), batch_size):
                    batch = vod_streams[i:i + batch_size]
                    for stream in batch:
                        stream["content_type"] = "vod"
                    if i + batch_size < len(vod_streams):
                        logger.info(f"  Processed {i + batch_size}/{len(vod_streams)} VOD streams...")

                all_streams.extend(vod_streams)
                logger.info(f"✅ Added {len(vod_streams)} VOD streams")

            # Process series (this can also be huge!)
            series = results.get("series")
            if isinstance(series, list) and series:
                logger.info(f"🔥 Processing {len(series)} series (this is also slow)...")

                # Batch process for better performance
                batch_size = 5000
                for i in range(0, len(series), batch_size):
                    batch = series[i:i + batch_size]
                    for show in batch:
                        show["content_type"] = "series"
                    if i + batch_size < len(series):
                        logger.info(f"  Processed {i + batch_size}/{len(series)} series...")

                all_streams.extend(series)
                logger.info(f"✅ Added {len(series)} series")

    except Exception as e:
        logger.error(f"Critical error fetching API data: {e}")
        return (
            None,
            None,
            json.dumps(
                {
                    "error": "API Fetch Error",
                    "details": f"Failed to fetch data from IPTV service: {str(e)}",
                }
            ),
            500,
        )

    logger.info(f"🚀 CONCURRENT FETCH COMPLETE: {len(all_categories)} total categories and {len(all_streams)} total streams")
    return all_categories, all_streams, None, None


@app.route("/categories", methods=["GET"])
def get_categories():
    """Get all available categories from the Xtream API"""
    # Get and validate parameters
    url, username, password, proxy_url, error, status_code = get_required_params()
    if error:
        return error, status_code

    # Check for VOD parameter - default to false to avoid timeouts (VOD is massive and slow!)
    include_vod = request.args.get("include_vod", "false").lower() == "true"
    logger.info(f"VOD content requested: {include_vod}")

    # Validate credentials
    user_data, error_json, error_code = validate_xtream_credentials(url, username, password)
    if error_json:
        return error_json, error_code, {"Content-Type": "application/json"}

    # Fetch categories
    categories, channels, error_json, error_code = fetch_categories_and_channels(url, username, password, include_vod)
    if error_json:
        return error_json, error_code, {"Content-Type": "application/json"}

    # Return categories as JSON
    return json.dumps(categories), 200, {"Content-Type": "application/json"}


@app.route("/xmltv", methods=["GET"])
def generate_xmltv():
    """Generate a filtered XMLTV file from the Xtream API"""
    # Get and validate parameters
    url, username, password, proxy_url, error, status_code = get_required_params()
    if error:
        return error, status_code

    # No filtering supported for XMLTV endpoint

    # Validate credentials
    user_data, error_json, error_code = validate_xtream_credentials(url, username, password)
    if error_json:
        return error_json, error_code, {"Content-Type": "application/json"}

    # Fetch XMLTV data
    base_url = url.rstrip("/")
    xmltv_url = f"{base_url}/xmltv.php?username={username}&password={password}"
    xmltv_data = fetch_api_data(xmltv_url, timeout=20)  # Longer timeout for XMLTV

    if isinstance(xmltv_data, tuple):  # Error response
        return json.dumps(xmltv_data[0]), xmltv_data[1], {"Content-Type": "application/json"}

    # If not proxying, return the original XMLTV
    if not proxy_url:
        return Response(
            xmltv_data, mimetype="application/xml", headers={"Content-Disposition": "attachment; filename=guide.xml"}
        )

    # Replace image URLs in the XMLTV content with proxy URLs
    def replace_icon_url(match):
        original_url = match.group(1)
        proxied_url = f"{proxy_url}/image-proxy/{encode_url(original_url)}"
        return f'<icon src="{proxied_url}"'

    xmltv_data = re.sub(r'<icon src="([^"]+)"', replace_icon_url, xmltv_data)

    # Return the XMLTV data
    return Response(
        xmltv_data, mimetype="application/xml", headers={"Content-Disposition": "attachment; filename=guide.xml"}
    )


@app.route("/m3u", methods=["GET", "POST"])
def generate_m3u():
    """Generate a filtered M3U playlist from the Xtream API"""
    # Get and validate parameters
    url, username, password, proxy_url, error, status_code = get_required_params()
    if error:
        return error, status_code

    # Parse filter parameters (support both GET and POST for large filter lists)
    if request.method == "POST":
        data = request.get_json() or {}
        unwanted_groups = parse_group_list(data.get("unwanted_groups", ""))
        wanted_groups = parse_group_list(data.get("wanted_groups", ""))
        no_stream_proxy = str(data.get("nostreamproxy", "")).lower() == "true"
        include_vod = str(data.get("include_vod", "false")).lower() == "true"
        include_channel_id = str(data.get("include_channel_id", "false")).lower() == "true"
        channel_id_tag = str(data.get("channel_id_tag", "channel-id"))
        logger.info("🔄 Processing POST request for M3U generation")
    else:
        unwanted_groups = parse_group_list(request.args.get("unwanted_groups", ""))
        wanted_groups = parse_group_list(request.args.get("wanted_groups", ""))
        no_stream_proxy = request.args.get("nostreamproxy", "").lower() == "true"
        include_vod = request.args.get("include_vod", "false").lower() == "true"
        include_channel_id = request.args.get("include_channel_id", "false") == "true"
        channel_id_tag = request.args.get("channel_id_tag", "channel-id")
        logger.info("🔄 Processing GET request for M3U generation")

    # For M3U generation, warn about VOD performance impact
    if include_vod:
        logger.warning("⚠️  M3U generation with VOD enabled - expect 2-5 minute generation time!")
    else:
        logger.info("⚡ M3U generation for live content only - should be fast!")

    # Log filter parameters (truncate if too long for readability)
    wanted_display = f"{len(wanted_groups)} groups" if len(wanted_groups) > 10 else str(wanted_groups)
    unwanted_display = f"{len(unwanted_groups)} groups" if len(unwanted_groups) > 10 else str(unwanted_groups)
    logger.info(f"Filter parameters - wanted_groups: {wanted_display}, unwanted_groups: {unwanted_display}, include_vod: {include_vod}")

    # Warn about massive filter lists
    total_filters = len(wanted_groups) + len(unwanted_groups)
    if total_filters > 20:
        logger.warning(f"⚠️  Large filter list detected ({total_filters} categories) - this will be slower!")
    if total_filters > 50:
        logger.warning(f"🐌 MASSIVE filter list ({total_filters} categories) - expect 3-5 minute processing time!")

    # Validate credentials
    user_data, error_json, error_code = validate_xtream_credentials(url, username, password)
    if error_json:
        return error_json, error_code, {"Content-Type": "application/json"}

    # Fetch categories and channels
    categories, streams, error_json, error_code = fetch_categories_and_channels(url, username, password, include_vod)
    if error_json:
        return error_json, error_code, {"Content-Type": "application/json"}

    # Extract user info and server URL
    username = user_data["user_info"]["username"]
    password = user_data["user_info"]["password"]

    server_url = f"http://{user_data['server_info']['url']}:{user_data['server_info']['port']}"

    # Create category name lookup
    category_names = {cat["category_id"]: cat["category_name"] for cat in categories}

    # Log all available groups
    all_groups = set(category_names.values())
    logger.info(f"All available groups: {sorted(all_groups)}")

    # Generate M3U playlist
    m3u_playlist = "#EXTM3U\n"

    # Track included groups
    included_groups = set()
    processed_streams = 0
    total_streams = len(streams)

    # Pre-compile filter patterns for massive filter lists (performance optimization)
    wanted_patterns = [pattern.lower() for pattern in wanted_groups] if wanted_groups else []
    unwanted_patterns = [pattern.lower() for pattern in unwanted_groups] if unwanted_groups else []

    logger.info(f"🔍 Starting to filter {total_streams} streams...")
    batch_size = 10000  # Process streams in batches for better performance

    for stream in streams:
        content_type = stream.get("content_type", "live")

        # Determine group title based on content type
        if content_type == "series":
            # For series, use series name as group title
            group_title = f"Series - {category_names.get(stream.get('category_id'), 'Uncategorized')}"
            stream_name = stream.get("name", "Unknown Series")
        else:
            # For live and VOD content
            group_title = category_names.get(stream.get("category_id"), "Uncategorized")
            stream_name = stream.get("name", "Unknown")

            # Add content type prefix for VOD
            if content_type == "vod":
                group_title = f"VOD - {group_title}"

        # Optimized filtering logic using pre-compiled patterns
        include_stream = True
        group_title_lower = group_title.lower()

        if wanted_patterns:
            # Only include streams from specified groups (optimized matching)
            include_stream = any(
                group_matches(group_title, wanted_group) for wanted_group in wanted_groups
            )
        elif unwanted_patterns:
            # Exclude streams from unwanted groups (optimized matching)
            include_stream = not any(
                group_matches(group_title, unwanted_group) for unwanted_group in unwanted_groups
            )

        processed_streams += 1

        # Progress logging for large datasets
        if processed_streams % batch_size == 0:
            logger.info(f"  📊 Processed {processed_streams}/{total_streams} streams ({(processed_streams/total_streams)*100:.1f}%)")

        if include_stream:
            included_groups.add(group_title)

            tags = [
                f'tvg-name="{stream_name}"',
                f'group-title="{group_title}"',
            ]

            # Handle logo URL - proxy only if stream proxying is enabled
            original_logo = stream.get("stream_icon", "")
            if original_logo and not no_stream_proxy:
                logo_url = f"{proxy_url}/image-proxy/{encode_url(original_logo)}"
            else:
                logo_url = original_logo
            tags.append(f'tvg-logo="{logo_url}"')

            # Handle channel id if enabled
            if include_channel_id:
                channel_id = stream.get("epg_channel_id")
                if channel_id:
                    tags.append(f'{channel_id_tag}="{channel_id}"')

            # Create the stream URL based on content type
            if content_type == "live":
                # Live TV streams
                stream_url = f"{server_url}/live/{username}/{password}/{stream['stream_id']}.ts"
            elif content_type == "vod":
                # VOD streams
                stream_url = f"{server_url}/movie/{username}/{password}/{stream['stream_id']}.{stream.get('container_extension', 'mp4')}"
            elif content_type == "series":
                # Series streams - use the first episode if available
                if "episodes" in stream and stream["episodes"]:
                    first_episode = list(stream["episodes"].values())[0][0] if stream["episodes"] else None
                    if first_episode:
                        episode_id = first_episode.get("id", stream.get("series_id", ""))
                        stream_url = f"{server_url}/series/{username}/{password}/{episode_id}.{first_episode.get('container_extension', 'mp4')}"
                    else:
                        continue  # Skip series without episodes
                else:
                    # Fallback for series without episode data
                    series_id = stream.get("series_id", stream.get("stream_id", ""))
                    stream_url = f"{server_url}/series/{username}/{password}/{series_id}.mp4"

            # Apply stream proxying if enabled
            if not no_stream_proxy:
                stream_url = f"{proxy_url}/stream-proxy/{encode_url(stream_url)}"

            # Add stream to playlist
            m3u_playlist += (
                f'#EXTINF:0 {" ".join(tags)},{stream_name}\n'
            )
            m3u_playlist += f"{stream_url}\n"

    # Log included groups after filtering
    logger.info(f"Groups included after filtering: {sorted(included_groups)}")
    logger.info(f"Groups excluded after filtering: {sorted(all_groups - included_groups)}")

    # Determine filename based on content included
    filename = "FullPlaylist.m3u" if include_vod else "LiveStream.m3u"

    logger.info(f"✅ M3U generation complete! Generated playlist with {len(included_groups)} groups")

    # Return the M3U playlist with proper CORS headers for frontend
    headers = {
        "Content-Disposition": f"attachment; filename={filename}",
        "Access-Control-Allow-Origin": "*",
        "Access-Control-Allow-Methods": "GET, POST, OPTIONS",
        "Access-Control-Allow-Headers": "Content-Type"
    }

    return Response(m3u_playlist, mimetype="audio/x-scpls", headers=headers)


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Run the Flask app.")
    parser.add_argument(
        "--port", type=int, default=5000, help="Port number to run the app on"
    )
    args = parser.parse_args()

    app.run(debug=True, host="0.0.0.0", port=args.port)