#!/bin/bash
#
# Script to build a Arch .pkg package for @PACKAGE_NAME@
#
# This version:
# - Prefers a source tarball already present in the current directory
# - Only downloads it if not found locally
#
# Requirements:
# - Run as root (or with sudo) for proper ownership/permissions in package

set -euo pipefail

VERSION="@PACKAGE_VERSION@"
TARBALL="@PACKAGE@-${VERSION}.tar.gz"
SOURCE_URL="https://github.com/amadvance/@PACKAGE@/releases/download/v${VERSION}/${TARBALL}"
PKG_NAME="@PACKAGE@"
PKG_ROOT="${PKG_NAME}-arch-root"

if [[ ! -f "pkg/.PKGINFO" ]]; then
  echo "Error: .PKGINFO not found in the current directory."
  exit 1
fi

# Prefer local tarball
if [[ -f "./${TARBALL}" ]]; then
  echo "Found ${TARBALL} locally."
else
  echo "Downloading ${TARBALL}..."
  curl -L -O "$SOURCE_URL"
fi

# Clean previous builds
rm -rf "${PKG_ROOT}" @PACKAGE@-${VERSION}

# Extract source
echo "Extracting source..."
tar -xzf "${TARBALL}"

# Build the software
echo "Configuring and building @PACKAGE@..."
cd @PACKAGE@-${VERSION}
./configure --prefix=/usr --sysconfdir=/etc
make -j4

# Install into package root
echo "Installing into temporary package root..."
mkdir -p "../${PKG_ROOT}/usr"
make install DESTDIR="../${PKG_ROOT}"

# Add example config and docs
mkdir -p "../${PKG_ROOT}/usr/share/doc/@PACKAGE@"
cp @PACKAGE@.conf.example AUTHORS HISTORY README "../${PKG_ROOT}/usr/share/doc/@PACKAGE@/"
cp LICENSES/GPL-3.0 "../${PKG_ROOT}/usr/share/doc/@PACKAGE@/COPYING"

cd ..

# Copy Files
echo "Copying into"
BUILD_DATE=$(date -u +%s)
PACKAGE_SIZE=$(du -sb "${PKG_ROOT}" | awk '{print $1}')
sed -e "s/@BUILD_DATE@/${BUILD_DATE}/" \
    -e "s/@PACKAGE_SIZE@/${PACKAGE_SIZE}/" \
    pkg/.PKGINFO > "${PKG_ROOT}/.PKGINFO"

cd ${PKG_ROOT}

echo "Create .MTREE"
bsdtar -czf .MTREE --format=mtree --options='!all,use-set,type,uid,gid,mode,time,size,md5,sha256,link' .PKGINFO usr

# Build the .pkg package
echo "Building .PKG package..."
tar --owner=0 --group=0 -cvf - .PKGINFO .MTREE usr | zstd -c -z -q - > ../${PKG_NAME}-${VERSION}-1-x86_64.pkg.tar.zst

cd ..

echo "Cleanup..."
rm -rf "${PKG_ROOT}" @PACKAGE@-${VERSION}

echo ""
echo "Build complete!"
echo "The .pkg package should be in the current directory:"
ls @PACKAGE@-${VERSION}-*-*.zst

echo ""
echo "You can install it with:"
echo "  sudo pacman -U ${PKG_NAME}-${VERSION}-1-x86_64.pkg.tar.zst"