#!/bin/bash

# Slackware build script for piavpn-app

# Copyright 2025, Matt Dinslage, Springfield Missouri
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=piavpn-app
SRCNAM=pia-linux
SRCVER=3.7-08412
VERSION=${VERSION:-3.7_08412}
BUILD=${BUILD:-2}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  LIBDIRSUFFIX=""
  echo "This package is currently only available for 64bit."
  exit 1
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  LIBDIRSUFFIX=""
  echo "This package is currently only available for 64bit."
  exit 1
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  LIBDIRSUFFIX="64"
elif [ "$ARCH" = "aarch64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  SRCARCH="arm64"
  LIBDIRSUFFIX="64"
else
  echo "Package for $(uname -m) architecture is not available."
  exit 1
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP

# choose the correct upstream .run filename
if [ "$ARCH" = "aarch64" ]; then
  SRCFILE="${SRCNAM}-${SRCARCH}-${SRCVER}.run"
else
  SRCFILE="${SRCNAM}-${SRCVER}.run"
fi

rm -rf "$PRGNAM-$VERSION"
sh "$CWD/$SRCFILE" --noexec --target "$TMP/$PRGNAM-$VERSION"
cd "$TMP/$PRGNAM-$VERSION"
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

# Create target directories
mkdir -p "$PKG/opt/piavpn/bin"
mkdir -p "$PKG/usr/share/applications"
mkdir -p "$PKG/usr/share/pixmaps"

# Copy PIA core files
cp -a piafiles/* "$PKG/opt/piavpn/"

# Copy helper scripts into bin/
cp installfiles/*.sh "$PKG/opt/piavpn/bin/"
chmod 755 "$PKG/opt/piavpn/bin/"*.sh

# Remove unneeded scripts
rm -f "$PKG/opt/piavpn/bin/install-wireguard.sh" \
      "$PKG/opt/piavpn/bin/pia-uninstall.sh"

# Install icons and desktop entry
cp installfiles/app-icon.png "$PKG/usr/share/pixmaps/piavpn.png"
cp installfiles/piavpn.desktop "$PKG/usr/share/applications/piavpn.desktop"

# NetworkManager: By default keep PIA's WireGuard interface unmanaged
if [ "${NMMANAGER:-no}" != "yes" ]; then
  mkdir -p "$PKG/etc/NetworkManager/conf.d"
  cat > "$PKG/etc/NetworkManager/conf.d/90-wgpia-unmanaged.conf" << 'EOF'
[device-wgpia-unmanaged]
match-device=interface-name:wgpia*
managed=false
EOF
fi

# Fix .desktop file: remove hardcoded X11 env to support Wayland sessions
if [ -f "$PKG/usr/share/applications/piavpn.desktop" ]; then
  sed -i 's|^Exec=.*|Exec=/opt/piavpn/bin/pia-client %u|' \
    "$PKG/usr/share/applications/piavpn.desktop"
fi

if [ -x "$PKG/opt/piavpn/bin/pia-unbound" ]; then
  setcap 'cap_net_bind_service=+ep' "$PKG/opt/piavpn/bin/pia-unbound" || true
fi

# Create the rc file
mkdir -p $PKG/etc/rc.d
cp -a $CWD/rc.piavpn $PKG/etc/rc.d/rc.piavpn
chmod 755 $PKG/etc/rc.d/rc.piavpn
chown root:root $PKG/etc/rc.d/rc.piavpn
chmod 644 $PKG/usr/share/applications/piavpn.desktop

# limit log to the minimum to avoid excessive flooding
mkdir -p "$PKG/opt/piavpn/var"
cat > "$PKG/opt/piavpn/var/debug.txt" << EOF
[rules]
*.debug=false
*.info=false
*.warning=false
EOF

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a \
  piafiles/share/LICENSE.txt \
  $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
cat $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE