FROM python:3.10-slim

WORKDIR /app

RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc g++ && \
    rm -rf /var/lib/apt/lists/*

COPY requirements.txt .

# Install PyTorch CPU-only first (no GPU on HF free tier)
RUN pip install --no-cache-dir torch==2.4.1+cpu --index-url https://download.pytorch.org/whl/cpu

# Install remaining dependencies
RUN pip install --no-cache-dir -r requirements.txt

COPY . .

# Rebuild checkpoint from extracted archive if .ckpt is missing
RUN python scripts/rebuild_ckpt.py || true

EXPOSE 7860

CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]