#!/bin/bash
# packaging/build_rpm.sh  — Build an RPM package for pg_vault_tde
#
# Prerequisites on the build host (RHEL/Rocky/Fedora):
#   dnf install -y rpm-build postgresql18-devel openssl-devel libcurl-devel \
#                  pkgconfig gcc make
#   # or postgresql17-devel for PG17
#
# Usage:
#   bash packaging/build_rpm.sh [--pg-version 17|18]
#
# Output: ~/rpmbuild/RPMS/x86_64/postgresql{17,18}-pg_vault_tde-1.7-1.*.rpm
#
# Copyright (c) 2026 Miriade S.r.l. — PostgreSQL License

set -e
cd "$(dirname "$0")/.."  # move to project root

VERSION="1.7"
RELEASE="1"
PG_MAJOR="18"  # default; override with --pg-version
SPEC="packaging/rpm/pg_vault_tde.spec"
TARBALL="pg_vault_tde-${VERSION}.tar.gz"

# Parse arguments
while [[ $# -gt 0 ]]; do
    case "$1" in
        --pg-version)
            PG_MAJOR="$2"
            shift 2
            ;;
        *)
            echo "ERROR: Unknown argument '$1'"
            echo "Usage: $0 [--pg-version 17|18]"
            exit 1
            ;;
    esac
done

echo "========================================================"
echo "  Building RPM package: postgresql${PG_MAJOR}-pg_vault_tde-${VERSION}-${RELEASE}"
echo "========================================================"

# Verify build dependencies
for dep in rpmbuild pg_config; do
    if ! command -v "$dep" &>/dev/null; then
        echo "ERROR: '$dep' not found."
        echo "Install: dnf install rpm-build postgresql${PG_MAJOR}-devel"
        exit 1
    fi
done

PG_DETECTED=$(pg_config --version | grep -oP '\d+' | head -1)
if [ "$PG_DETECTED" != "$PG_MAJOR" ]; then
    echo "WARNING: pg_config reports PostgreSQL $PG_DETECTED but --pg-version ${PG_MAJOR} was requested"
fi

# Set up rpmbuild tree
mkdir -p ~/rpmbuild/{BUILD,RPMS,SOURCES,SPECS,SRPMS}

# Create source tarball from current directory (exclude .git, packaging/build artifacts)
echo "Creating source tarball..."
TMPDIR=$(mktemp -d)
mkdir -p "$TMPDIR/pg_vault_tde-${VERSION}"
rsync -a --exclude='.git' --exclude='*.o' --exclude='*.so' --exclude='*.bc' \
         --exclude='packaging' --exclude='tmp_pgext' \
         . "$TMPDIR/pg_vault_tde-${VERSION}/"
tar -czf ~/rpmbuild/SOURCES/"$TARBALL" \
    -C "$TMPDIR" "pg_vault_tde-${VERSION}"
rm -rf "$TMPDIR"
echo "  -> ~/rpmbuild/SOURCES/$TARBALL"

# Copy spec file
cp "$SPEC" ~/rpmbuild/SPECS/pg_vault_tde.spec

# Build RPM
echo "Building RPM for PG${PG_MAJOR}..."
rpmbuild -ba \
    --define "pgmajorversion ${PG_MAJOR}" \
    --define "pgpackageversion ${PG_MAJOR}" \
    ~/rpmbuild/SPECS/pg_vault_tde.spec

echo ""
echo "RPM build complete. Packages in ~/rpmbuild/RPMS/"
ls -la ~/rpmbuild/RPMS/*/postgresql${PG_MAJOR}-pg_vault_tde* 2>/dev/null || true

echo ""
echo "Install with:"
echo "  dnf install ~/rpmbuild/RPMS/x86_64/postgresql${PG_MAJOR}-pg_vault_tde-${VERSION}-${RELEASE}.*.rpm"
echo ""
echo "Then configure postgresql.conf:"
echo "  shared_preload_libraries = 'pg_vault_tde'"
echo "  # Restart PostgreSQL and run: CREATE EXTENSION pg_vault_tde;"