FROM python:3.10-slim

WORKDIR /app

RUN apt-get update && \
    apt-get install -y --no-install-recommends git gcc libc6-dev ffmpeg && \
    rm -rf /var/lib/apt/lists/*

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

# Pre-download model weights at build time so first inference is fast
RUN bs-roformer-download \
    --model roformer-model-bs-roformer-sw-by-jarredou \
    --output-dir /app/models

COPY . /app

ENV PORT=7860
EXPOSE 7860
ENV PYTHONUNBUFFERED=1
ENV PYTHONIOENCODING=UTF-8

CMD ["python", "-u", "app.py"]