FROM python:3.11-slim

# System dependencies
RUN apt-get update && apt-get install -y \
    ffmpeg \
    libgl1 \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    curl \
    git \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

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

# Copy application code
COPY . .

# Download SAM vit_b checkpoint at build time (375MB)
RUN mkdir -p models && \
    curl -L -o models/sam_vit_b.pth \
    "https://dl.fbaipublicfiles.com/segment_anything/sam_vit_b_01ec64.pth"

# HF Spaces requires port 7860
EXPOSE 7860

# Non-root user (HF Spaces requirement)
RUN useradd -m -u 1000 user
RUN chown -R user:user /app
USER user

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