#!/usr/bin/env bash

# SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
# SPDX-License-Identifier: CC-BY-NC-ND-4.0

SCRIPTDIR=$(dirname "${BASH_SOURCE[0]}")

function retry_command {
  # Package servers tend to be unreliable at times..
  # Retry a bunch of times.
  local RETRIES=10

  for i in $(seq 1 "$RETRIES"); do
    "$@" && break
    if [ "$i" == "$RETRIES" ]; then
      echo "Command \"$@\" failed after ${RETRIES} retries."
      exit 1
    fi
  done
}

if [ "$1" == "-inject-libc" ]; then
	echo "Injecting libc/libstdc++"
	INJECT_LIBC=true
	shift
fi

if [ "$#" -ne 5 ]; then
    echo "Syntax: $0 [-inject-libc] <target arch> <path to build directory> <deps prefix> <chroot dir> <output name>"
    exit 1
fi

ARCH=$1
BUILDDIR=$2
DEPSDIR=$3
CHROOTDIR=$4
NAME=$5

BINARY=duckstation-qt
APPDIRNAME=DuckStation.AppDir
STRIP=llvm-strip
TRIPLE="${ARCH}-linux-gnu"

declare -a SYSLIBS=(
	"libatk-1.0.so.0"
	"libatk-bridge-2.0.so.0"
	"libatspi.so.0"
	"libblkid.so.1"
	"libbrotlicommon.so.1"
	"libbrotlidec.so.1"
	"libbsd.so.0"
	"libcairo-gobject.so.2"
	"libcairo.so.2"
	"libcap.so.2"
	"libcrypto.so.3"
	"libcurl.so.4"
	"libdatrie.so.1"
	"libdbus-1.so.3"
	"libdeflate.so.0"
	"libepoxy.so.0"
	"libffi.so.8"
	"libgcrypt.so.20"
	"libgdk-3.so.0"
	"libgdk_pixbuf-2.0.so.0"
	"libgio-2.0.so.0"
	"libglib-2.0.so.0"
	"libgmodule-2.0.so.0"
	"libgnutls.so.30"
	"libgobject-2.0.so.0"
	"libgraphite2.so.3"
	"libgssapi_krb5.so.2"
	"libgtk-3.so.0"
	"libhogweed.so.6"
	"libidn2.so.0"
	"libjbig.so.0"
	"libk5crypto.so.3"
	"libkeyutils.so.1"
	"libkrb5.so.3"
	"libkrb5support.so.0"
	"liblber-2.5.so.0"
	"libldap-2.5.so.0"
	"liblz4.so.1"
	"liblzma.so.5"
	"libmd.so.0"
	"libmount.so.1"
	"libnettle.so.8"
	"libnghttp2.so.14"
	"libp11-kit.so.0"
	"libpango-1.0.so.0"
	"libpangocairo-1.0.so.0"
	"libpangoft2-1.0.so.0"
	"libpcre2-16.so.0"
	"libpcre2-8.so.0"
	"libpcre.so.3"
	"libpixman-1.so.0"
	"libpsl.so.5"
	"librtmp.so.1"
	"libsasl2.so.2"
	"libselinux.so.1"
	"libssh.so.4"
	"libssl.so.3"
	"libsystemd.so.0"
	"libtasn1.so.6"
	"libtiff.so.5"
	"libudev.so.1"
	"libunistring.so.2"
	"libXau.so.6"
	"libxcb-cursor.so.0"
	"libxcb-glx.so.0"
	"libxcb-icccm.so.4"
	"libxcb-image.so.0"
	"libxcb-keysyms.so.1"
	"libxcb-randr.so.0"
	"libxcb-render.so.0"
	"libxcb-render-util.so.0"
	"libxcb-shape.so.0"
	"libxcb-shm.so.0"
	"libxcb-sync.so.1"
	"libxcb-util.so.1"
	"libxcb-xfixes.so.0"
	"libxcb-xkb.so.1"
	"libXcomposite.so.1"
	"libXcursor.so.1"
	"libXdamage.so.1"
	"libXdmcp.so.6"
	"libXext.so.6"
	"libXfixes.so.3"
	"libXinerama.so.1"
	"libXi.so.6"
	"libxkbcommon.so.0"
	"libxkbcommon-x11.so.0"
	"libXrandr.so.2"
	"libXrender.so.1"
)

declare -a DEPLIBS=(
	"libbacktrace.so.0"
	"libfreetype.so.6"
	"libharfbuzz.so"
	"libjpeg.so.62"
	"libpng16.so.16"
	"libSDL2-2.0.so.0"
	"libsharpyuv.so.0"
	"libwebpdemux.so.2"
	"libwebpmux.so.3"
	"libwebp.so.7"
	"libzip.so.5"
	"libzstd.so.1"

	"libcpuinfo.so"
	"libdiscord-rpc.so"
	"liblunasvg.so"
	"libshaderc_ds.so"
	"libsoundtouch.so.2"
	"libspirv-cross-c-shared.so.0"

	#"libavcodec.so.61"
	#"libavformat.so.61"
	#"libavutil.so.59"
	#"libswscale.so.8"
	#"libswresample.so.5"
	#"libva-drm.so.2"
	#"libva.so.2"
)

declare -a QTLIBS=(
	"libQt6Core.so.6"
	"libQt6DBus.so.6"
	"libQt6Gui.so.6"
	"libQt6OpenGL.so.6"
	"libQt6Svg.so.6"
	"libQt6WaylandClient.so.6"
	"libQt6WaylandEglClientHwIntegration.so.6"
	"libQt6Widgets.so.6"
	"libQt6XcbQpa.so.6"
)

declare -a QTPLUGINS=(
	"plugins/iconengines"
	"plugins/imageformats"
	"plugins/platforminputcontexts"
	"plugins/platforms"
	"plugins/platformthemes"
	"plugins/wayland-decoration-client"
	"plugins/wayland-graphics-integration-client"
	"plugins/wayland-shell-integration"
	"plugins/xcbglintegrations"
)

set -e
IFS="
"

APPIMAGETOOL=./appimagetool-x86_64
APPIMAGERUNTIME=./runtime-${ARCH}
PATCHELF=patchelf

if [ ! -f "$APPIMAGETOOL" ]; then
	retry_command wget -O "$APPIMAGETOOL" https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-x86_64.AppImage
	chmod +x "$APPIMAGETOOL"
fi

if [ ! -f "$APPIMAGERUNTIME" ]; then
	retry_command wget -O "$APPIMAGERUNTIME" https://github.com/stenzek/type2-runtime/releases/download/continuous/runtime-${ARCH}
fi

OUTDIR=$(realpath "./$APPDIRNAME")
rm -fr "$OUTDIR"
mkdir "$OUTDIR"
mkdir -p "$OUTDIR/usr/bin" "$OUTDIR/usr/lib"

echo "Copying binary and resources..."
cp -a "$BUILDDIR/bin/$BINARY" "$BUILDDIR/bin/resources" "$BUILDDIR/bin/translations" "$OUTDIR/usr/bin"

# Currently we leave the main binary unstripped, uncomment if this is not desired.
# NOTE: Strip must come before patchelf, otherwise shit breaks.
$STRIP "$OUTDIR/usr/bin/$BINARY"

# Patch RPATH so the binary goes hunting for shared libraries in the AppDir instead of system.
echo "Patching RPATH in ${BINARY}..."
patchelf --set-rpath '$ORIGIN/../lib' "$OUTDIR/usr/bin/$BINARY"

# Libraries we pull in from the system.
echo "Copying system libraries..."
for lib in "${SYSLIBS[@]}"; do
	blib=$(basename "$lib")
	echo "$CHROOTDIR/lib/$TRIPLE/$lib"
	if [ -f "$CHROOTDIR/lib/$TRIPLE/$lib" ]; then
		cp "$CHROOTDIR/lib/$TRIPLE/$lib" "$OUTDIR/usr/lib/$blib"
	elif [ -f "$CHROOTDIR/usr/lib/$TRIPLE/$lib" ]; then
		cp "$CHROOTDIR/usr/lib/$TRIPLE/$lib" "$OUTDIR/usr/lib/$blib"
	elif [ -f "$CHROOTDIR/lib/$lib" ]; then
		cp "$CHROOTDIR/lib/$lib" "$OUTDIR/usr/lib/$blib"
	elif [ -f "$CHROOTDIR/usr/lib/$lib" ]; then
		cp "$CHROOTDIR/usr/lib/$lib" "$OUTDIR/usr/lib/$blib"
	else
		echo "*** Failed to find '$blib'"
		exit 1
	fi

	$STRIP $OUTDIR/usr/lib/$blib
done

echo "Copying local libraries..."
for lib in "${DEPLIBS[@]}"; do
	blib=$(basename "$lib")
	echo "$DEPSDIR/lib/$lib"
	if [ -f "$DEPSDIR/lib/$lib" ]; then
		cp "$DEPSDIR/lib/$lib" "$OUTDIR/usr/lib/$blib"
	else
		echo "*** Failed to find '$blib'"
		exit 1
	fi

	$STRIP "$OUTDIR/usr/lib/$blib"
done

echo "Copying Qt libraries..."
for lib in "${QTLIBS[@]}"; do
	cp -avL "$DEPSDIR/lib/$lib" "$OUTDIR/usr/lib"
	$STRIP "$OUTDIR/usr/lib/$lib"
done

echo "Copying Qt plugins..."
mkdir -p $OUTDIR/usr/lib/plugins
for plugin in "${QTPLUGINS[@]}"; do
	mkdir -p "$OUTDIR/usr/lib/$plugin"
	cp -avL "$DEPSDIR/$plugin/"*.so "$OUTDIR/usr/lib/$plugin/"
done

for so in $(find $OUTDIR/usr/lib/plugins -iname '*.so'); do
	# This is ../../ because it's usually plugins/group/name.so
	echo "Patching RPATH in ${so}..."
	patchelf --set-rpath '$ORIGIN/../..' "$so"
	$STRIP "$so"
done

for so in $(find $OUTDIR/usr/lib -maxdepth 1); do
	if [ -f "$so" ]; then
		echo "Patching RPATH in ${so}"
		patchelf --set-rpath '$ORIGIN' "$so"
	fi
done

echo "Creating qt.conf..."
cat > "$OUTDIR/usr/bin/qt.conf" << EOF
[Paths]
Plugins = ../lib/plugins
EOF

# Copy desktop/icon
echo "Copying desktop/icon..."
mkdir -p "$OUTDIR/usr/share/applications"
mkdir -p "$OUTDIR/usr/share/icons/hicolor/512x512/apps"
cp -v "$SCRIPTDIR/../org.duckstation.DuckStation.desktop" "$OUTDIR/usr/share/applications"
cp -v "$SCRIPTDIR/../org.duckstation.DuckStation.png" "$OUTDIR/usr/share/icons/hicolor/512x512/apps"
ln -s "usr/share/applications/org.duckstation.DuckStation.desktop" "$OUTDIR"
ln -s "usr/share/icons/hicolor/512x512/apps/org.duckstation.DuckStation.png" "$OUTDIR"

# Generate AppStream meta-info.
echo "Generating AppStream metainfo..."
mkdir -p "$OUTDIR/usr/share/metainfo"
"$SCRIPTDIR/../generate-metainfo.sh" "$OUTDIR/usr/share/metainfo"

# Copy AppRun
cp "$SCRIPTDIR/apprun-cross.sh" "$OUTDIR/AppRun"
chmod +x "$OUTDIR/AppRun"
ln -s "usr/bin/$BINARY" "$OUTDIR/AppRun.wrapped"

# Copy in AppRun hooks.
echo "Copying AppRun hooks..."
mkdir -p "$OUTDIR/apprun-hooks"
for hookpath in "$SCRIPTDIR/apprun-hooks"/*; do
	hookname=$(basename "$hookpath")
	cp -v "$hookpath" "$OUTDIR/apprun-hooks/$hookname"
	sed -i -e 's/exec /source "$this_dir"\/apprun-hooks\/"'"$hookname"'"\nexec /' "$OUTDIR/AppRun"
done

# Optionally inject libc
if [ "$INJECT_LIBC" == true ]; then
	echo "Injecting libc/libc++..."
	if [ "$ARCH" == "aarch64" ]; then
		DEBARCH="arm64"
	else
		echo "Unknown arch for libc injection."
		exit 1
	fi

	"$SCRIPTDIR/inject-libc.sh" "$OUTDIR" "$DEBARCH" "$TRIPLE" "https://ports.ubuntu.com" "$BINARY"
fi

echo "Generating AppImage..."
rm -f "$NAME.AppImage"
"$APPIMAGETOOL" -v --runtime-file "$APPIMAGERUNTIME" "$OUTDIR" "$NAME.AppImage"