FROM python:3.11-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# 1. Install system dependencies (root)
RUN apt-get update && apt-get install -y \
    ffmpeg \
    git \
    && rm -rf /var/lib/apt/lists/*

# 2. Install Python dependencies globally (root).
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# 3. Create the unprivileged user and writable cache dir
RUN useradd -m -u 1000 user && \
    mkdir -p /home/user/.cache/huggingface && \
    chown -R user:user /home/user/.cache

# 4. Switch context to the unprivileged user
USER user
ENV HOME=/home/user
ENV HF_HOME=/home/user/.cache/huggingface
WORKDIR $HOME/app

# 5. Pre-cache the 'base' model to avoid runtime downloads/timeouts
RUN python -c "from faster_whisper import download_model; download_model('base')"

# 6. Copy the application code
COPY --chown=user . .

EXPOSE 7860

CMD ["python", "backend.py"]