import secrets
import subprocess
from urllib.parse import urlencode


def generate_token(length: int = 32) -> str:
    return secrets.token_urlsafe(length)[:length]


def generate_password(length: int = 14) -> str:
    alphabet = 'ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz23456789!@#$%'
    return ''.join(secrets.choice(alphabet) for _ in range(length))


def hls_url(base: str, slug: str) -> str:
    return f"{base.rstrip('/')}/{slug}/index.m3u8"


def ingest_url_with_query(host: str, slug: str, token: str) -> str:
    return f"rtmp://{host}:1935/{slug}?{urlencode({'token': token})}"


def ffprobe_stream(url: str) -> dict:
    cmd = ['ffprobe', '-v', 'quiet', '-print_format', 'json', '-show_streams', '-show_format', url]
    try:
        result = subprocess.run(cmd, capture_output=True, text=True, timeout=8, check=True)
    except Exception:
        return {}

    import json
    try:
        payload = json.loads(result.stdout or '{}')
    except Exception:
        return {}

    out = {}
    for stream in payload.get('streams', []):
        if stream.get('codec_type') == 'video':
            out['video_codec'] = stream.get('codec_name')
            out['width'] = stream.get('width')
            out['height'] = stream.get('height')
            out['fps'] = stream.get('avg_frame_rate')
        elif stream.get('codec_type') == 'audio':
            out['audio_codec'] = stream.get('codec_name')
            out['audio_channels'] = stream.get('channels')
            out['audio_sample_rate'] = stream.get('sample_rate')
    if payload.get('format', {}).get('bit_rate'):
        out['bitrate'] = payload['format']['bit_rate']
    return out