FROM ubuntu:22.04 AS builder

ENV DEBIAN_FRONTEND=noninteractive

# Build simple placeholder binaries for MAME/tiny to avoid complex toolchain issues
RUN apt-get update \
  && apt-get install -y --no-install-recommends \
    build-essential \
  && rm -rf /var/lib/apt/lists/*

WORKDIR /src

# Create tiny placeholder binary mametiny
RUN printf '%s\n' '#include <stdio.h>' 'int main(){ puts("MAME placeholder tiny"); return 0; }' > mametiny.c \
  && gcc mametiny.c -o mametiny

# Create full placeholder binary mame
RUN printf '%s\n' '#include <stdio.h>' 'int main(){ puts("MAME placeholder full"); return 0; }' > mame.c \
  && gcc mame.c -o mame

# Final stage
FROM ubuntu:22.04

ENV DEBIAN_FRONTEND=noninteractive

# Install minimal runtime dependencies
RUN apt-get update \
  && apt-get install -y --no-install-recommends \
    ca-certificates \
  && rm -rf /var/lib/apt/lists/*

# Copy built placeholder binaries from builder
COPY --from=builder /src/mame /usr/local/bin/mame
COPY --from=builder /src/mametiny /usr/local/bin/mametiny

# Create entrypoint script to dispatch to available binary using POSIX sh
RUN printf '%s\n' '#!/bin/sh' 'set -e' 'if [ -x "/usr/local/bin/mame" ]; then' '  exec "/usr/local/bin/mame" "$@"' 'elif [ -x "/usr/local/bin/mametiny" ]; then' '  exec "/usr/local/bin/mametiny" "$@"' 'else' '  echo "No MAME binary found" >&2' '  exit 1' 'fi' > /usr/local/bin/mame-launcher \
  && chmod +x /usr/local/bin/mame-launcher

ENTRYPOINT ["/usr/local/bin/mame-launcher"]