import os
import argparse
import requests
import logging
from requests.exceptions import RequestException, Timeout, ConnectionError, HTTPError

class StreamValidator:
    def __init__(self, timeout=10, user_agent=None):
        self.timeout = timeout
        self.session = requests.Session()
        self.session.headers.update({
            'User-Agent': user_agent or 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36'
        })
        
    def validate_stream(self, url):
        """Validate a media stream URL with multiple fallback checks"""
        try:
            headers = {'Range': 'bytes=0-1024'}
            with self.session.get(
                url,
                headers=headers,
                timeout=self.timeout,
                stream=True,
                allow_redirects=True
            ) as response:
                if response.status_code not in [200, 206]:
                    return False, f"Invalid status code: {response.status_code}"
                
                content_type = response.headers.get('Content-Type', '')
                if not self._is_valid_content_type(content_type):
                    return False, f"Invalid content type: {content_type}"
                
                try:
                    next(response.iter_content(chunk_size=1024))
                    return True, "Stream is valid"
                except (ConnectionError, Timeout):
                    return False, "Connection failed during content read"
                
        except HTTPError as e:
            return False, f"HTTP Error: {str(e)}"
        except ConnectionError as e:
            return False, f"Connection Error: {str(e)}"
        except Timeout:
            return False, "Connection timeout"
        except RequestException as e:
            return False, f"Request Exception: {str(e)}"
        except Exception as e:
            return False, f"Validation error: {str(e)}"

    def _is_valid_content_type(self, content_type):
        valid_types = [
            'video/mp2t', 'application/vnd.apple.mpegurl',
            'application/dash+xml', 'video/mp4',
            'video/webm', 'application/octet-stream',
            'application/x-mpegURL'
        ]
        return any(ct in content_type for ct in valid_types)

    def parse_playlist(self, file_path):
        """Extract stream URLs from M3U playlist file"""
        urls = []
        try:
            with open(file_path, 'r') as f:
                for line in f:
                    line = line.strip()
                    if line and not line.startswith('#'):
                        urls.append(line)
        except Exception as e:
            logging.error(f"Error reading playlist file: {str(e)}")
            raise
        return urls

def main():
    parser = argparse.ArgumentParser(
        description='Validate streaming URLs from command line arguments or playlist files',
        formatter_class=argparse.ArgumentDefaultsHelpFormatter
    )
    parser.add_argument(
        'sources',
        nargs='+',
        help='List of URLs or file paths containing stream URLs'
    )
    parser.add_argument(
        '--timeout',
        type=int,
        default=20,
        help='Timeout in seconds for stream checks'
    )
    parser.add_argument(
        '--output',
        default='deadstreams.txt',
        help='Output file name for inactive streams'
    )
    
    args = parser.parse_args()

    # Configure logging
    logging.basicConfig(
        level=logging.INFO,
        format='%(asctime)s - %(levelname)s - %(message)s',
        handlers=[logging.FileHandler('stream_check.log'), logging.StreamHandler()]
    )

    validator = StreamValidator(timeout=args.timeout)
    dead_streams = []
    all_urls = []

    # Process command line arguments
    for source in args.sources:
        if os.path.isfile(source):
            try:
                all_urls.extend(validator.parse_playlist(source))
                logging.info(f"Parsed playlist file: {source}")
            except Exception as e:
                logging.error(f"Failed to process file {source}: {str(e)}")
        else:
            all_urls.append(source)

    # Validate all collected URLs
    for url in all_urls:
        logging.info(f"Checking: {url}")
        valid, message = validator.validate_stream(url)
        status = "ALIVE" if valid else "DEAD"
        print(f"{url}\nStatus: {status}\nDetails: {message}\n")
        if not valid:
            dead_streams.append(url)

    # Save dead streams to file
    if dead_streams:
        with open(args.output, 'w') as f:
            f.write('\n'.join(dead_streams))
        logging.info(f"Found {len(dead_streams)} dead streams. Saved to {args.output}.")

if __name__ == "__main__":
    main()