# syntax=docker/dockerfile:1
# =============================================================================
# ja4sentinel - Dockerfile de packaging RPM (Rocky 8/9/10, AlmaLinux)
# CentOS 7 support removed - minimum Rocky Linux 8
# =============================================================================

# =============================================================================
# Stage 1: Builder - Compilation du binaire Go sur Rocky Linux 9
# Using Rocky Linux 9 as builder ensures binary compatibility across all RHEL-based distros
# =============================================================================
FROM rockylinux:9 AS builder

WORKDIR /build

# Install dependencies (Go + libpcap for packet capture)
# CRB (CodeReady Builder) repository is required for libpcap-devel
RUN dnf install -y epel-release && \
    dnf config-manager --set-enabled crb && \
    dnf install -y \
    golang \
    git \
    libpcap-devel \
    gcc \
    make \
    && dnf clean all

# Copy go mod files
COPY go.mod go.sum ./

# Download dependencies
RUN go mod download

# Copy source code
COPY . .

# Build binary for Linux
# Binary will be dynamically linked but compatible with all RHEL-based distros
ARG VERSION=1.0.6
ARG BUILD_TIME=""
ARG GIT_COMMIT=""
RUN mkdir -p dist && \
    CGO_ENABLED=1 GOOS=linux GOARCH=amd64 \
    go build -buildvcs=false \
    -ldflags "-X main.Version=${VERSION} -X main.BuildTime=${BUILD_TIME} -X main.GitCommit=${GIT_COMMIT}" \
    -o dist/ja4sentinel \
    ./cmd/ja4sentinel

# =============================================================================
# Stage 2: RPM Builder - Build RPM pour Rocky 8/9/10, AlmaLinux using rpmbuild
# =============================================================================
FROM rockylinux:9 AS rpm-builder

WORKDIR /package

# VERSION must be redeclared for each stage that needs it
ARG VERSION=1.0.6

# Install rpm-build tools (Rocky Linux 9)
RUN dnf install -y \
    rpm \
    rpm-build \
    gcc \
    make \
    && dnf clean all

# Setup rpmbuild directory structure
RUN mkdir -p /root/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}

# Copy spec file
COPY packaging/rpm/ja4sentinel.spec /root/rpmbuild/SPECS/ja4sentinel.spec

# Copy binary from Go builder and other files to SOURCES
COPY --from=builder /build/dist/ja4sentinel /root/rpmbuild/SOURCES/ja4sentinel
COPY packaging/systemd/ja4sentinel.service /root/rpmbuild/SOURCES/ja4sentinel.service
COPY packaging/systemd/config.yml /root/rpmbuild/SOURCES/config.yml

# Set permissions
RUN chmod 755 /root/rpmbuild/SOURCES/ja4sentinel && \
    chmod 644 /root/rpmbuild/SOURCES/ja4sentinel.service && \
    chmod 640 /root/rpmbuild/SOURCES/config.yml

# Build RPM for Rocky Linux 8 (el8)
# Note: Requires libpcap at runtime
RUN rpmbuild --define "_topdir /root/rpmbuild" \
             --define "dist .el8" \
             --define "build_version ${VERSION}" \
             --target x86_64 \
             -bb /root/rpmbuild/SPECS/ja4sentinel.spec && \
    mkdir -p /packages/rpm/el8 && \
    cp /root/rpmbuild/RPMS/x86_64/*.el8.x86_64.rpm /packages/rpm/el8/

# Build RPM for Rocky Linux 9 (el9)
# Note: Requires libpcap at runtime
RUN rpmbuild --define "_topdir /root/rpmbuild" \
             --define "dist .el9" \
             --define "build_version ${VERSION}" \
             --target x86_64 \
             -bb /root/rpmbuild/SPECS/ja4sentinel.spec && \
    mkdir -p /packages/rpm/el9 && \
    cp /root/rpmbuild/RPMS/x86_64/*.el9.x86_64.rpm /packages/rpm/el9/

# Build RPM for AlmaLinux 10 (el10) - compatible with Rocky Linux 10
# Note: Requires libpcap at runtime
RUN rpmbuild --define "_topdir /root/rpmbuild" \
             --define "dist .el10" \
             --define "build_version ${VERSION}" \
             --target x86_64 \
             -bb /root/rpmbuild/SPECS/ja4sentinel.spec && \
    mkdir -p /packages/rpm/el10 && \
    cp /root/rpmbuild/RPMS/x86_64/*.el10.x86_64.rpm /packages/rpm/el10/

# =============================================================================
# Stage 3: Output - Image finale avec les packages RPM
# =============================================================================
FROM alpine:latest AS output

WORKDIR /packages
COPY --from=rpm-builder /packages/rpm/el8/*.rpm /packages/rpm/el8/
COPY --from=rpm-builder /packages/rpm/el9/*.rpm /packages/rpm/el9/
COPY --from=rpm-builder /packages/rpm/el10/*.rpm /packages/rpm/el10/

CMD ["sh", "-c", "echo '=== RPM Packages (el8 - Rocky 8) ===' && ls -la /packages/rpm/el8/ && echo '' && echo '=== RPM Packages (el9 - Rocky 9) ===' && ls -la /packages/rpm/el9/ && echo '' && echo '=== RPM Packages (el10 - Alma/Rocky 10) ===' && ls -la /packages/rpm/el10/"]