FROM python:3.10-slim

# System dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    git \
    libgl1 \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender-dev \
    && rm -rf /var/lib/apt/lists/*

# Create app directory
WORKDIR /app

# Step 1: Install PyTorch FIRST (CPU-only to save space)
RUN pip install --no-cache-dir \
    torch torchvision --index-url https://download.pytorch.org/whl/cpu

# Step 2: Install Detectron2 (needs torch already installed)
RUN pip install --no-cache-dir \
    'git+https://github.com/facebookresearch/detectron2.git'

# Step 3: Install remaining dependencies
RUN pip install --no-cache-dir \
    fastapi>=0.104.0 \
    "uvicorn[standard]>=0.24.0" \
    opencv-python-headless>=4.8.0 \
    numpy>=1.24.0 \
    Pillow>=10.0.0 \
    requests>=2.31.0 \
    huggingface_hub>=0.19.0 \
    python-multipart>=0.0.6

# Step 4: V5.1 Pipeline — MobileSAM + SigLIP
RUN pip install --no-cache-dir \
    "transformers>=4.40.0" \
    timm>=0.9.0 \
    'git+https://github.com/ChaoningZhang/MobileSAM.git'

# Copy app code
COPY . .

# Create a non-root user (HF Spaces requirement)
RUN useradd -m -u 1000 user
USER user

# Expose port (HF Spaces uses 7860)
EXPOSE 7860

# Start the server
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]