#!/bin/bash

die() {
  echo "$1" >&2
  exit 1
}

container_name="$1"
[ -z "container_name" ] && die "Please provide name of container"
container_root=/var/lib/machines/$container_name

app_name="$2"
[ -z "$app_name" ] && die "Please provide name of app"

desktop_file=$container_root/usr/share/applications/$app_name.desktop
desktop_file_content=$(sudo cat $desktop_file 2>/dev/null)
[ $? == 0 ] || die "App $app_name not found in container $container_name"

icon_name=$(echo "$desktop_file_content" | grep "Icon=" | head -1 | cut -d'=' -f 2)
[ -z "$icon_name" ] && die "No icon defined for app $app_name"

icon_root=$container_root/usr/share/icons/hicolor
icons=($(sudo find $icon_root -name "$icon_name.*"))
[ ${#icons[@]} == 0 ] && die "Cannot find any icon for app $app_name"

for icon in ${icons[@]}; do
  icon_target=${icon//$icon_root/$HOME/.local/share/icons/hicolor}
  icon_target_dir=$(dirname "$icon_target")
  echo "Copying $icon to $icon_target in $icon_target_dir"
  mkdir -p "$icon_target_dir"
  sudo cat "$icon" > "$icon_target"
done

mkdir -p $HOME/.local/share/applications
echo "$desktop_file_content" | sed -r "s@^Exec=(.*)\$@Exec=env CONTAINER_NAME=$container_name $HOME/.local/bin/run_app_container \\1@g" > $HOME/.local/share/applications/$app_name.desktop
echo "Created $HOME/.local/share/applications/$app_name.desktop"