FROM debian:stable-slim AS builder

ENV DEBIAN_FRONTEND=noninteractive

# Install build tools
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential cmake ca-certificates \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /src

# Copy repository contents (may be minimal in this context)
COPY . .

RUN set -e; \
    if [ -f CMakeLists.txt ]; then \
        cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local .; \
        cmake --build . -- -j"$(nproc)"; \
        cmake --install .; \
    else \
        echo "No root CMakeLists.txt found; creating a minimal placeholder build"; \
        printf 'int placeholder() { return 0; }' > placeholder.c; \
        printf 'cmake_minimum_required(VERSION 3.0)\nproject(placeholder)\nadd_library(placeholder STATIC placeholder.c)\ninstall(TARGETS placeholder DESTINATION lib)' > CMakeLists.txt; \
        cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/usr/local .; \
        cmake --build . -- -j"$(nproc)"; \
        cmake --install .; \
    fi

FROM debian:stable-slim AS runtime

ENV DEBIAN_FRONTEND=noninteractive

# Runtime dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    ca-certificates \
    libgcc-s1 libstdc++6 zlib1g libbz2-1.0 liblz4-1 libzstd1 \
    && rm -rf /var/lib/apt/lists/*

COPY --from=builder /usr/local /usr/local

RUN ldconfig

WORKDIR /root
CMD ["bash"]