#!/bin/bash
# Build RPM Package for RHEL/CentOS/Fedora
# Run on: RHEL 8/9, CentOS 8/9, Fedora 38+
# Designed for native Gitea Actions runner execution

set -e

echo "=== Linux Patch API - RPM Build Script ==="
echo ""

# Check if running on RPM-based system
if ! command -v rpmbuild &> /dev/null; then
    echo "Installing RPM build tools..."
    if command -v dnf &> /dev/null; then
        dnf install -y rpm-build cargo rust gcc systemd-devel
    elif command -v yum &> /dev/null; then
        yum install -y rpm-build cargo rust gcc systemd-devel
    else
        echo "Error: Cannot install rpm-build. Please install manually."
        exit 1
    fi
fi

# Get version from Cargo.toml
VERSION=$(grep '^version' Cargo.toml | head -1 | sed 's/.*=.*"\([^"]*\)".*/\1/')
echo "Building version: $VERSION"

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

# Create source tarball (required by %autosetup in spec file)
echo "Creating source tarball..."
TMPDIR=$(mktemp -d)
mkdir -p "$TMPDIR/linux-patch-api-${VERSION}"

# Copy files excluding unnecessary directories
cp -r . "$TMPDIR/linux-patch-api-${VERSION}/"

# Remove unnecessary directories from tarball
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/target"
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/.git"
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/releases"
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/.github"
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/debian"
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/arch-package"
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/.abuild"
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/apk-package"
rm -rf "$TMPDIR/linux-patch-api-${VERSION}/.a0proj"

tar -czf ~/rpmbuild/SOURCES/linux-patch-api-${VERSION}.tar.gz -C "$TMPDIR" "linux-patch-api-${VERSION}"
rm -rf "$TMPDIR"

# Prepare spec file with dynamic version
echo "Preparing spec file..."
sed "s/VERSION_PLACEHOLDER/$VERSION/" linux-patch-api.spec > ~/rpmbuild/SPECS/linux-patch-api.spec

# Build RPM
echo "Building RPM package..."
rpmbuild -ba ~/rpmbuild/SPECS/linux-patch-api.spec

# Copy to releases directory
echo ""
echo "Copying package to releases/..."
mkdir -p releases
cp ~/rpmbuild/RPMS/x86_64/*.rpm releases/

echo ""
echo "=== Build Complete ==="
echo "Package: releases/linux-patch-api-*.rpm"
echo ""
echo "Install with:"
echo "  dnf install -y ./releases/linux-patch-api-*.rpm"
echo "  # or"
echo "  yum install -y ./releases/linux-patch-api-*.rpm"