# Multi-stage build for Linux amd64 and arm64. The build runs natively for the
# selected Docker platform; production selects linux/amd64 explicitly.
FROM debian:bookworm-slim AS builder
ARG ZIG_VERSION=0.17.0
RUN apt-get update && apt-get install -y --no-install-recommends curl xz-utils ca-certificates && rm -rf /var/lib/apt/lists/*
RUN set -eux; \
    case "$(dpkg --print-architecture)" in \
        amd64) zig_arch=x86_64; zig_sha256=1cbe9df9f27e6b78d14ccbca43b6703a404ef79ef1c463de901d7f088d4e2026 ;; \
        arm64) zig_arch=aarch64; zig_sha256=9e8d11661d4ae3bd57702a3832781e23ad151dde5798e16a5ccd503f65234ff8 ;; \
        *) echo "unsupported architecture: $(dpkg --print-architecture)" >&2; exit 1 ;; \
    esac; \
    curl -fSL "https://ziglang.org/download/${ZIG_VERSION}/zig-${zig_arch}-linux-${ZIG_VERSION}.tar.xz" -o /tmp/zig.tar.xz; \
    echo "${zig_sha256}  /tmp/zig.tar.xz" | sha256sum --check -; \
    tar xJf /tmp/zig.tar.xz -C /opt; \
    rm /tmp/zig.tar.xz; \
    mv "/opt/zig-${zig_arch}-linux-${ZIG_VERSION}" /opt/zig
ENV PATH=/opt/zig:$PATH
WORKDIR /build

# fetch dependencies first (cacheable — only changes when build.zig.zon changes)
COPY build.zig build.zig.zon ./
RUN for delay in 0 2 5; do \
        sleep "$delay"; \
        zig build --fetch=all && exit 0; \
    done; \
    exit 1

# then copy source and build
COPY src/ src/
# Io.Threaded is the production backend; the old Io.Uring stdlib patch is not
# needed. Keep glibc for its allocator behavior under the thread-per-PDS model.
RUN set -eux; \
    case "$(dpkg --print-architecture)" in \
        amd64) target=x86_64-linux-gnu ;; \
        arm64) target=aarch64-linux-gnu ;; \
        *) echo "unsupported architecture: $(dpkg --print-architecture)" >&2; exit 1 ;; \
    esac; \
    zig build -Doptimize=ReleaseSafe -Dcpu=baseline "-Dtarget=${target}"

FROM 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"]