#!/usr/bin/bash
#  SPDX-License-Identifier: MIT
#
#  ES-DE Frontend
#  create_AppImage.sh
#
#  Runs the complete process of building a Linux AppImage.
#  The SDL library is also built and included in the AppImage.
#
#  This script has only been tested on Ubuntu 20.04 LTS and 22.04 LTS.
#

# How many CPU threads to use for the compilation.
JOBS=4

SDL_RELEASE_TAG=release-2.30.2
SDL_SHARED_LIBRARY=libSDL2-2.0.so.0.3000.2

echo "Building AppImage..."

if [ ! -f .clang-format ]; then
  echo "You need to run this script from the root of the repository."
  exit
fi

if [ ! -f appimagetool-x86_64.AppImage ]; then
  echo -e "Can't find appimagetool-x86_64.AppImage, downloading the latest version...\n"
  wget "https://github.com/AppImage/AppImageKit/releases/download/continuous/appimagetool-x86_64.AppImage"
fi

chmod a+x appimagetool-x86_64.AppImage

if [ ! -f linuxdeploy-x86_64.AppImage ]; then
  echo -e "Can't find linuxdeploy-x86_64.AppImage, downloading the latest version...\n"
  wget "https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage"
fi

chmod a+x linuxdeploy-x86_64.AppImage

if [ ! -f external/SDL/build/${SDL_SHARED_LIBRARY} ]; then
  echo
  echo "Building the SDL library..."
  cd external
  rm -rf SDL
  git clone https://github.com/libsdl-org/SDL.git
  cd SDL
  git checkout $SDL_RELEASE_TAG

  mkdir build
  cd build
  cmake -DCMAKE_BUILD_TYPE=Release -S .. -B .

  if [ $(grep PKG_PIPEWIRE_VERSION:INTERNAL= CMakeCache.txt) = "PKG_PIPEWIRE_VERSION:INTERNAL=" ]; then
    echo
    echo -e "The SDL library is not configured with PipeWire support, aborting."
    exit
  fi

  make -j${JOBS}
  cd ../../..
else
  echo
  echo -e "The SDL library has already been built, skipping this step\n"
fi

rm -rf ./AppDir
mkdir AppDir

rm -f CMakeCache.txt
cmake -DAPPIMAGE_BUILD=on .
make clean
make -j${JOBS}
make install DESTDIR=AppDir
cd AppDir
ln -s usr/bin/es-de AppRun
ln -s usr/share/pixmaps/es-de.svg .
ln -s usr/share/applications/org.es_de.frontend.desktop .
ln -s es-de.svg .DirIcon
cd usr/bin
ln -s ../share/es-de/resources .
ln -s ../share/es-de/themes .
cd ../../..

./linuxdeploy-x86_64.AppImage -l /lib/x86_64-linux-gnu/libOpenGL.so.0 -l /lib/x86_64-linux-gnu/libGLdispatch.so.0 -l /lib/x86_64-linux-gnu/libgio-2.0.so.0 --appdir AppDir
cp external/SDL/build/${SDL_SHARED_LIBRARY} AppDir/usr/lib/libSDL2-2.0.so.0
./appimagetool-x86_64.AppImage AppDir

mv ES-DE-x86_64.AppImage ES-DE_x64.AppImage
echo -e "\nCreated AppImage ES-DE_x64.AppImage"