FROM python:3.12-slim

# System libraries required by OpenCV and PyTorch
RUN apt-get update && apt-get install -y --no-install-recommends \
        libglib2.0-0 \
        libgl1 \
        libsm6 \
        libxrender1 \
        libxext6 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Install Python dependencies before copying the rest of the code
# so this layer is cached as long as requirements.txt doesn't change.
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code and assets
COPY . .

# HF Spaces runs containers as uid 1000 (non-root)
RUN useradd -m -u 1000 appuser \
    && chown -R appuser /app
USER appuser

EXPOSE 7860

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