# syntax=docker/dockerfile:1
# =============================================================================
# logcorrelator - Dockerfile de build et packaging RPM multi-distros
# Build avec rpmbuild natif (plus FPM)
# =============================================================================

# =============================================================================
# Stage 0: Common RPM tools - Shared across all distributions
# =============================================================================
FROM rockylinux:8 AS rpm-common-tools

WORKDIR /package

# Install RPM build tools (rpm-build only, no FPM)
RUN --mount=type=cache,target=/var/cache/dnf \
    dnf install -y rpm-build rpmdevtools findutils -y && \
    dnf clean all

# Common script to build RPM with rpmbuild
COPY <<'EOF' /build-rpm.sh
#!/bin/bash
set -e

DIST_NAME=$1
VERSION=$2

echo "Building RPM for ${DIST_NAME}..."

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

# Copy spec file
cp /build/packaging/rpm/logcorrelator.spec /root/rpmbuild/SPECS/

# Copy files directly to BUILD directory (no archive needed)
# This is simpler than creating/extracting a source archive
cp -r /tmp/pkgroot/* /root/rpmbuild/BUILD/

# Build RPM using rpmbuild
# Use --noclean to keep BUILD directory contents
# Use --rpmdir to output RPMs directly to /packages/rpm/${DIST_NAME}/
rpmbuild -bb /root/rpmbuild/SPECS/logcorrelator.spec \
    --define "version ${VERSION}" \
    --define "dist .${DIST_NAME}" \
    --define "_topdir /root/rpmbuild" \
    --define "_rpmdir /packages/rpm/${DIST_NAME}" \
    --noclean

# RPMs are already in /packages/rpm/${DIST_NAME}/
echo "RPM built for ${DIST_NAME}:"
ls -la /packages/rpm/${DIST_NAME}/
EOF

RUN chmod +x /build-rpm.sh

# =============================================================================
# Stage 1: Builder - Compilation du binaire Go
# =============================================================================
FROM golang:1.21 AS builder

WORKDIR /build

# Install minimal dependencies for Go build
RUN --mount=type=cache,target=/var/cache/apt \
    apt-get update && apt-get install -y --no-install-recommends \
    git \
    && rm -rf /var/lib/apt/lists/*

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

# Download dependencies (cached)
RUN --mount=type=cache,target=/go/pkg/mod \
    go mod download

# Copy source code
COPY . .

# Build binary for Linux
ARG VERSION=1.0.0
RUN --mount=type=cache,target=/go/pkg/mod \
    mkdir -p dist && \
    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 \
    go build -ldflags="-w -s -X main.Version=${VERSION}" \
    -o dist/logcorrelator \
    ./cmd/logcorrelator

# =============================================================================
# Stage 2: RPM Package builder for Enterprise Linux 8 (el8)
# =============================================================================
FROM rpm-common-tools AS rpm-el8-builder

WORKDIR /package

# Copy builder stage for binary and packaging files
COPY --from=builder /build /build

# Create package root directory structure
RUN mkdir -p /tmp/pkgroot/usr/bin \
    && mkdir -p /tmp/pkgroot/etc/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/log/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/run/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/lib/logcorrelator \
    && mkdir -p /tmp/pkgroot/etc/systemd/system \
    && mkdir -p /tmp/pkgroot/etc/logrotate.d

# Copy binary from builder
COPY --from=builder /build/dist/logcorrelator /tmp/pkgroot/usr/bin/logcorrelator
RUN chmod 755 /tmp/pkgroot/usr/bin/logcorrelator

# Copy config files
COPY --from=builder /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml
COPY --from=builder /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml.example
RUN chmod 640 /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml \
    && chmod 640 /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml.example

# Copy systemd service
COPY --from=builder /build/logcorrelator.service /tmp/pkgroot/etc/systemd/system/logcorrelator.service
RUN chmod 644 /tmp/pkgroot/etc/systemd/system/logcorrelator.service

# Copy logrotate config
COPY --from=builder /build/packaging/rpm/logrotate /tmp/pkgroot/etc/logrotate.d/logcorrelator
RUN chmod 644 /tmp/pkgroot/etc/logrotate.d/logcorrelator

# Set directory permissions
RUN chmod 755 /tmp/pkgroot/var/log/logcorrelator \
    && chmod 755 /tmp/pkgroot/var/run/logcorrelator \
    && chmod 755 /tmp/pkgroot/var/lib/logcorrelator

# Build RPM for el8
ARG VERSION=1.0.0
RUN /build-rpm.sh el8 ${VERSION}

# =============================================================================
# Stage 3: RPM Package builder for Enterprise Linux 9 (el9)
# =============================================================================
FROM rpm-common-tools AS rpm-el9-builder

WORKDIR /package

# Copy builder stage for binary and packaging files
COPY --from=builder /build /build

# Create package root directory structure
RUN mkdir -p /tmp/pkgroot/usr/bin \
    && mkdir -p /tmp/pkgroot/etc/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/log/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/run/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/lib/logcorrelator \
    && mkdir -p /tmp/pkgroot/etc/systemd/system \
    && mkdir -p /tmp/pkgroot/etc/logrotate.d

# Copy binary from builder
COPY --from=builder /build/dist/logcorrelator /tmp/pkgroot/usr/bin/logcorrelator
RUN chmod 755 /tmp/pkgroot/usr/bin/logcorrelator

# Copy config files
COPY --from=builder /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml
COPY --from=builder /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml.example
RUN chmod 640 /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml \
    && chmod 640 /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml.example

# Copy systemd service
COPY --from=builder /build/logcorrelator.service /tmp/pkgroot/etc/systemd/system/logcorrelator.service
RUN chmod 644 /tmp/pkgroot/etc/systemd/system/logcorrelator.service

# Copy logrotate config
COPY --from=builder /build/packaging/rpm/logrotate /tmp/pkgroot/etc/logrotate.d/logcorrelator
RUN chmod 644 /tmp/pkgroot/etc/logrotate.d/logcorrelator

# Set directory permissions
RUN chmod 755 /tmp/pkgroot/var/log/logcorrelator \
    && chmod 755 /tmp/pkgroot/var/run/logcorrelator \
    && chmod 755 /tmp/pkgroot/var/lib/logcorrelator

# Build RPM for el9
ARG VERSION=1.0.0
RUN /build-rpm.sh el9 ${VERSION}

# =============================================================================
# Stage 4: RPM Package builder for Enterprise Linux 10 (el10)
# =============================================================================
FROM rpm-common-tools AS rpm-el10-builder

WORKDIR /package

# Copy builder stage for binary and packaging files
COPY --from=builder /build /build

# Create package root directory structure
RUN mkdir -p /tmp/pkgroot/usr/bin \
    && mkdir -p /tmp/pkgroot/etc/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/log/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/run/logcorrelator \
    && mkdir -p /tmp/pkgroot/var/lib/logcorrelator \
    && mkdir -p /tmp/pkgroot/etc/systemd/system \
    && mkdir -p /tmp/pkgroot/etc/logrotate.d

# Copy binary from builder
COPY --from=builder /build/dist/logcorrelator /tmp/pkgroot/usr/bin/logcorrelator
RUN chmod 755 /tmp/pkgroot/usr/bin/logcorrelator

# Copy config files
COPY --from=builder /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml
COPY --from=builder /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml.example
RUN chmod 640 /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml \
    && chmod 640 /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml.example

# Copy systemd service
COPY --from=builder /build/logcorrelator.service /tmp/pkgroot/etc/systemd/system/logcorrelator.service
RUN chmod 644 /tmp/pkgroot/etc/systemd/system/logcorrelator.service

# Copy logrotate config
COPY --from=builder /build/packaging/rpm/logrotate /tmp/pkgroot/etc/logrotate.d/logcorrelator
RUN chmod 644 /tmp/pkgroot/etc/logrotate.d/logcorrelator

# Set directory permissions
RUN chmod 755 /tmp/pkgroot/var/log/logcorrelator \
    && chmod 755 /tmp/pkgroot/var/run/logcorrelator \
    && chmod 755 /tmp/pkgroot/var/lib/logcorrelator

# Build RPM for el10
ARG VERSION=1.0.0
RUN /build-rpm.sh el10 ${VERSION}

# =============================================================================
# Stage 5: Output - Image finale avec les packages RPM
# =============================================================================
FROM alpine:latest AS output

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

CMD ["sh", "-c", "echo '=== RPM Enterprise Linux 8 ===' && ls -la /packages/rpm/el8/ && echo '' && echo '=== RPM Enterprise Linux 9 ===' && ls -la /packages/rpm/el9/ && echo '' && echo '=== RPM Enterprise Linux 10 ===' && ls -la /packages/rpm/el10/'"]