#!/bin/sh

APP=krita
SITE="https://krita.org"

# CREATE DIRECTORIES
if [ -z "$APP" ]; then exit 1; fi
mkdir -p "/opt/$APP/tmp" "/opt/$APP/icons" && cd "/opt/$APP/tmp" || exit 1

# ADD THE REMOVER
echo "#!/bin/sh
rm -f /usr/share/applications/AM-$APP.desktop /usr/local/bin/$APP
rm -R -f /opt/$APP" >> "/opt/$APP/remove"
chmod a+x "/opt/$APP/remove"

# DOWNLOAD AND PREPARE THE APP
# $version is also used for updates

version=$(wget -q https://repology.org/project/$APP/versions -O - | grep "newest version" | head -1 | grep -o -P '(?<=">).*(?=</a)' | sed 's/^.*>//')
wget "https://download.kde.org/stable/krita/$version/krita-$version-x86_64.appimage"
echo "$version" >> "/opt/$APP/version"
cd ..
mv ./tmp/* ./"$APP"
chmod a+x "/opt/$APP/$APP"
rm -R -f ./tmp

# LINK
ln -s "/opt/$APP/$APP" "/usr/local/bin/$APP"

# SCRIPT TO UPDATE THE PROGRAM
cat >> /opt/$APP/AM-updater << 'EOF'
#!/bin/sh
APP=krita
version0=$(cat /opt/$APP/version)
version=$(wget -q https://repology.org/project/$APP/versions -O - | grep "newest version" | head -1 | grep -o -P '(?<=">).*(?=</a)' | sed 's/^.*>//')
if [ "$version" = "$version0" ]; then
  echo "Update not needed!"
else
  notify-send "A new version of $APP is available, please wait"
  mkdir /opt/$APP/tmp
  cd /opt/$APP/tmp
  wget "https://download.kde.org/stable/krita/$version/krita-$version-x86_64.appimage"
  cd ..
  rm ./version
  echo "$version" >> ./version
  mv --backup=t ./tmp/* ./"$APP"
  chmod a+x "/opt/$APP/$APP"
  rm -R -f ./tmp ./*~
  notify-send "$APP is updated!"
fi
EOF
chmod a+x /opt/$APP/AM-updater

# LAUNCHER & ICON
cd "/opt/$APP" || exit 1
./"$APP" --appimage-extract .DirIcon 1>/dev/null && mv ./squashfs-root/.DirIcon ./DirIcon
./"$APP" --appimage-extract *.desktop 1>/dev/null && mv ./squashfs-root/*.desktop ./"$APP".desktop
./"$APP" --appimage-extract share/applications/*.desktop 1>/dev/null && mv ./squashfs-root/share/applications/*.desktop ./"$APP".desktop
./"$APP" --appimage-extract usr/share/applications/*.desktop 1>/dev/null && mv ./squashfs-root/usr/share/applications/*.desktop ./"$APP".desktop
if [ -L ./DirIcon ]; then
	LINKPATH=$(readlink ./DirIcon)
	./"$APP" --appimage-extract "$LINKPATH" && mv ./squashfs-root/"$LINKPATH" ./DirIcon
fi
sed -i "s#Exec=[^ ]*#Exec=$APP#g; s#Icon=.*#Icon=/opt/$APP/icons/$APP#g" ./"$APP".desktop
mv ./"$APP".desktop /usr/share/applications/AM-"$APP".desktop && mv ./DirIcon ./icons/"$APP" 2>/dev/null
rm -R -f ./squashfs-root