# multi-stage build: compile natively inside x86_64 linux container
# uses Debian (glibc) because zig 0.15's C++ codegen for musl
# produces illegal instructions in RocksDB's LRU cache
FROM --platform=linux/amd64 debian:bookworm-slim AS builder
RUN apt-get update && apt-get install -y --no-install-recommends curl xz-utils ca-certificates && rm -rf /var/lib/apt/lists/*
RUN curl -fSL https://ziglang.org/download/0.15.2/zig-x86_64-linux-0.15.2.tar.xz \
    | tar xJ -C /opt
ENV PATH=/opt/zig-x86_64-linux-0.15.2:$PATH
WORKDIR /build

# fetch dependencies first (cacheable — only changes when build.zig.zon changes)
COPY build.zig build.zig.zon ./
RUN zig build --fetch-only 2>/dev/null || true

# then copy source and build
COPY src/ src/
RUN zig build -Doptimize=ReleaseSafe -Dcpu=baseline -Dtarget=x86_64-linux-gnu

FROM --platform=linux/amd64 debian:bookworm-slim
RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates && rm -rf /var/lib/apt/lists/*
COPY --from=builder /build/zig-out/bin/zlay /usr/local/bin/zlay
RUN mkdir -p /data/events /data/collection-index
ENV RELAY_DATA_DIR=/data/events
EXPOSE 3000 3001
ENTRYPOINT ["/usr/local/bin/zlay"]