# syntax=docker/dockerfile:1
# =============================================================================
# logcorrelator - Dockerfile de build et packaging RPM multi-distros
# Optimisé avec stages communs et builds parallèles
# =============================================================================

# =============================================================================
# Stage 0: Common RPM tools - Shared across all distributions
# =============================================================================
FROM ruby:3.2-bookworm AS rpm-common-tools

WORKDIR /package

# Install RPM build tools and fpm (COMMON - cached across all distros)
RUN --mount=type=cache,target=/var/cache/dnf \
    --mount=type=cache,target=/var/cache/ruby \
    dnf install -y epel-release && \
    dnf install -y ruby rubygems ruby-devel rpm-build gcc make -y && \
    gem install fpm -v 1.16.0 --no-document && \
    dnf clean all

# Common script to build RPM (parameterized)
COPY <<EOF /build-rpm.sh
#!/bin/bash
set -e

DIST_NAME=\$1
DIST_IMAGE=\$2
VERSION=\$3

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

# Create package root
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
mkdir -p /tmp/scripts

# Copy binary (from builder stage)
if [ -f /build/dist/logcorrelator ]; then
    cp /build/dist/logcorrelator /tmp/pkgroot/usr/bin/logcorrelator
    chmod 755 /tmp/pkgroot/usr/bin/logcorrelator
fi

# Copy config files
if [ -f /build/config.example.yml ]; then
    cp /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml
    cp /build/config.example.yml /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml.example
    chmod 640 /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml
    chmod 640 /tmp/pkgroot/etc/logcorrelator/logcorrelator.yml.example
fi

# Copy systemd service
if [ -f /build/logcorrelator.service ]; then
    cp /build/logcorrelator.service /tmp/pkgroot/etc/systemd/system/logcorrelator.service
    chmod 644 /tmp/pkgroot/etc/systemd/system/logcorrelator.service
fi

# Copy scripts
if [ -f /build/packaging/rpm/post ]; then
    cp /build/packaging/rpm/post /tmp/scripts/post
    chmod 755 /tmp/scripts/post
fi
if [ -f /build/packaging/rpm/preun ]; then
    cp /build/packaging/rpm/preun /tmp/scripts/preun
    chmod 755 /tmp/scripts/preun
fi
if [ -f /build/packaging/rpm/postun ]; then
    cp /build/packaging/rpm/postun /tmp/scripts/postun
    chmod 755 /tmp/scripts/postun
fi
if [ -f /build/packaging/rpm/logrotate ]; then
    cp /build/packaging/rpm/logrotate /tmp/pkgroot/etc/logrotate.d/logcorrelator
    chmod 644 /tmp/pkgroot/etc/logrotate.d/logcorrelator
fi

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

# Build RPM
mkdir -p /packages/rpm/\${DIST_NAME}
fpm -s dir -t rpm \
    -n logcorrelator \
    -v "\${VERSION}" \
    -C /tmp/pkgroot \
    --architecture "x86_64" \
    --rpm-os linux \
    --description "Log correlation service for HTTP and network events" \
    --url "https://github.com/logcorrelator/logcorrelator" \
    --license "MIT" \
    --vendor "logcorrelator <dev@example.com>" \
    --rpm-dist \${DIST_NAME} \
    --depends "systemd" \
    --after-install /tmp/scripts/post \
    --before-remove /tmp/scripts/preun \
    --after-remove /tmp/scripts/postun \
    -p /packages/rpm/\${DIST_NAME}/logcorrelator-\${VERSION}-1.\${DIST_NAME}.x86_64.rpm \
    usr/bin/logcorrelator \
    etc/logcorrelator/logcorrelator.yml \
    etc/logcorrelator/logcorrelator.yml.example \
    var/log/logcorrelator \
    var/run/logcorrelator \
    var/lib/logcorrelator \
    etc/systemd/system/logcorrelator.service \
    etc/logrotate.d/logcorrelator

echo "RPM built for \${DIST_NAME}"
EOF

RUN chmod +x /build-rpm.sh

# =============================================================================
# Stage 1: Builder - Compilation du binaire Go (shared by all RPM builds)
# =============================================================================
FROM golang:1.21 AS builder

WORKDIR /build

# Install dependencies (minimal, just 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)
# Uses common RPM tools from rpm-common-tools stage
# =============================================================================
FROM rpm-common-tools AS rpm-el8-builder

WORKDIR /package

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

# Build RPM for el8
ARG VERSION=1.0.0
RUN /build-rpm.sh el8 rockylinux:8 ${VERSION}

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

WORKDIR /package

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

# Build RPM for el9
ARG VERSION=1.0.0
RUN /build-rpm.sh el9 rockylinux:9 ${VERSION}

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

WORKDIR /package

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

# Build RPM for el10
ARG VERSION=1.0.0
RUN /build-rpm.sh el10 almalinux:10 ${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/'"]