# Multi-stage build for libevent

# Builder stage: compile libevent from source using CMake
FROM ubuntu:22.04 AS builder

ENV DEBIAN_FRONTEND=noninteractive

RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
        cmake \
        git \
        pkg-config \
        zlib1g-dev \
        libssl-dev \
        libmbedtls-dev \
        ca-certificates \
    && rm -rf /var/lib/apt/lists/*

# Copy source
WORKDIR /src
COPY . /src

# Build and install
RUN mkdir -p build && cd build \
    && cmake .. -DCMAKE_BUILD_TYPE=Release \
    && cmake --build . -- -j"$(nproc)" \
    && cmake --build . --target install

# Runtime stage: minimal image with the built library
FROM ubuntu:22.04 AS runtime

ENV DEBIAN_FRONTEND=noninteractive

# Copy installed libs from builder
COPY --from=builder /usr/local /usr/local

# Ensure dynamic linker can find libraries installed to /usr/local
ENV LD_LIBRARY_PATH=/usr/local/lib:/usr/local/lib64:$LD_LIBRARY_PATH

WORKDIR /work
CMD ["bash"]