FROM python:3.12-slim

# System deps: ffmpeg for muxing, nodejs for yt-dlp JS runtime, ca-certs for TLS
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    nodejs \
    ca-certificates \
 && rm -rf /var/lib/apt/lists/*

WORKDIR /app

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Optional but strongly recommended: keep yt-dlp fresh (only if installed via pip)
RUN python -m pip install --no-cache-dir -U yt-dlp

# Make yt-dlp defaults persistent (so your subprocess call doesn't need flags)
# 1) tell yt-dlp to use node as JS runtime
# 2) (optional) force android client to dodge SABR weirdness more often
RUN mkdir -p /etc/yt-dlp && printf "%s\n" \
  "--js-runtimes node" \
  "--extractor-args youtube:player_client=android" \
  > /etc/yt-dlp.conf

COPY app.py ./app.py
COPY controller_core.py ./controller_core.py

ENV PYTHONUNBUFFERED=1

EXPOSE 8000
CMD ["python", "app.py"]