FROM node:20-slim

# Install FreeCAD headless (freecad-cmd) and dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    freecad \
    ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# Set headless Qt/FreeCAD env
ENV QT_QPA_PLATFORM=offscreen
ENV DISPLAY=""
ENV FREECAD_USER_CONFIG=/tmp/.FreeCAD

WORKDIR /app

# Copy MCP server source
COPY freecad-mcp-server/ .

# Install Node deps + supergateway (stdio→HTTP bridge)
RUN npm install && npm install -g supergateway

# Ensure generated files dir exists
RUN mkdir -p /data/files/generated

EXPOSE 8808

# Use StreamableHttp (supports multiple concurrent connections, unlike SSE)
CMD ["supergateway", "--stdio", "node build/index.js", "--port", "8808", "--outputTransport", "streamableHttp"]