#!/usr/bin/env bash

# Opt out of and remove Fedora's flatpak repo
if grep -qz 'fedora' <<< "$(flatpak remotes)"; then
  /usr/bin/gnome-software --quit
  /usr/lib/fedora-third-party/fedora-third-party-opt-out
  /usr/bin/fedora-third-party disable
  flatpak remote-delete fedora --force
  flatpak remote-delete fedora-testing --force

  # Remove flatpak apps from origin fedora
  FEDORA_FLATPAKS=$(flatpak list --app --columns=application,origin | grep -w 'fedora' | awk '{print $1}')
  flatpak remove --system --noninteractive ${FEDORA_FLATPAKS[@]}

  # Remove flatpak runtimes from origin fedora
  FEDORA_FLATPAKS=$(flatpak list --runtime --columns=application,arch,branch,origin | grep -w 'fedora' | awk '{print $1"/"$2"/"$3}')
  flatpak remove --system --noninteractive ${FEDORA_FLATPAKS[@]}
fi

REPO_INFO="/usr/share/bluebuild/default-flatpaks/system/repo-info.yml"
REPO_URL=$(yq '.repo-url' $REPO_INFO)
REPO_NAME=$(yq '.repo-name' $REPO_INFO)
REPO_TITLE=$(yq '.repo-title' $REPO_INFO)

# Set up system-wide Flatpak repository
if [[ ! $REPO_URL == "null" && ! $REPO_NAME == "null" ]]; then
  flatpak remote-add --if-not-exists --system "$REPO_NAME" "$REPO_URL"
  echo "Adding system-wide remote $REPO_NAME from $REPO_URL"  
fi

# If configured remote is flathub, enable it here.
# Flathub is already installed on Fedora, but not enabled by default,
# so the above command won't add it again
if [[ $REPO_NAME == "flathub" ]]; then
  flatpak remote-modify --system "$REPO_NAME" --enable
fi

# Change repository title to configured title, if not null
if [[ ! $REPO_TITLE == "null" ]]; then
  flatpak remote-modify --system "$REPO_NAME" --title="$REPO_TITLE"
  echo "Setting title $REPO_TITLE for remote $REPO_NAME"  
fi

# Notifications config
NOTIFICATIONS_FILE="/usr/share/bluebuild/default-flatpaks/notifications"
USER_NOTIFICATIONS_FILE="/etc/bluebuild/default-flatpaks/notifications"
# Ignore words starting with # symbol, whitelines & duplicate entries for notifications config
MAINTAINER_NOTIFICATIONS=$(cat "$NOTIFICATIONS_FILE" | grep -v -E '^#|^$' | awk '!seen[$0]++')
USER_NOTIFICATIONS=$(cat "$USER_NOTIFICATIONS_FILE" | grep -v -E '^#|^$' | awk '!seen[$0]++')

# If user modified notifications config, utilize user's configuration, otherwise maintainer's
if [[ -n $USER_NOTIFICATIONS ]]; then
  NOTIFICATIONS="$USER_NOTIFICATIONS"
else
  NOTIFICATIONS="$MAINTAINER_NOTIFICATIONS"
fi  

# Installed flatpaks
FLATPAK_LIST=$(flatpak list --system --app --columns=application)

# Flatpak list files
INSTALL_LIST_FILE="/usr/share/bluebuild/default-flatpaks/system/install"
REMOVE_LIST_FILE="/usr/share/bluebuild/default-flatpaks/system/remove"
USER_INSTALL_LIST_FILE="/etc/bluebuild/default-flatpaks/system/install"
USER_REMOVE_LIST_FILE="/etc/bluebuild/default-flatpaks/system/remove"
# Prefer user's install + remove list over maintainer's, in case when same flatpak ID is present in maintainer's install list + user's remove list & vice-versa
# Also ignores words starting with # symbol, whitelines & duplicate entries
MAINTAINER_INSTALL_LIST=$(comm -23 <(sort "$INSTALL_LIST_FILE") <(sort "$USER_REMOVE_LIST_FILE") | grep -v -E '^#|^$' | awk '!seen[$0]++')
MAINTAINER_REMOVE_LIST=$(comm -23 <(sort "$REMOVE_LIST_FILE") <(sort "$USER_INSTALL_LIST_FILE") | grep -v -E '^#|^$' | awk '!seen[$0]++')
# Combine maintainer & user list. Ignore words starting with # symbol, whitelines & duplicate entries
COMBINED_INSTALL_LIST=$(cat <(echo "$MAINTAINER_INSTALL_LIST") "$USER_INSTALL_LIST_FILE" | grep -v -E '^#|^$' | awk '!seen[$0]++')
COMBINED_REMOVE_LIST=$(cat <(echo "$MAINTAINER_REMOVE_LIST") "$USER_REMOVE_LIST_FILE" | grep -v -E '^#|^$' | awk '!seen[$0]++')

function notify-send-pre-install {
     user_name=$(loginctl list-sessions --output=json | jq -r '.[].user')
     uid=$(loginctl list-sessions --output=json | jq -r '.[].uid')
     xdg_runtime_path="/run/user/$uid"
     display_var=$(printenv DISPLAY)
     sudo -u "$user_name" DBUS_SESSION_BUS_ADDRESS=unix:path="$xdg_runtime_path"/bus DISPLAY="$display_var" notify-send "Flatpak Installer" "Started install of system flatpaks" --app-name="Flatpak Installer" -u NORMAL
}

function notify-send-install {
     user_name=$(loginctl list-sessions --output=json | jq -r '.[].user')
     uid=$(loginctl list-sessions --output=json | jq -r '.[].uid')
     xdg_runtime_path="/run/user/$uid"
     display_var=$(printenv DISPLAY)
     sudo -u "$user_name" DBUS_SESSION_BUS_ADDRESS=unix:path="$xdg_runtime_path"/bus DISPLAY="$display_var" notify-send "Flatpak Installer" "Finished install of system flatpaks:\n$INSTALL_LIST" --app-name="Flatpak Installer" -u NORMAL
}

function notify-send-pre-uninstall {
      user_name=$(loginctl list-sessions --output=json | jq -r '.[].user')
      uid=$(loginctl list-sessions --output=json | jq -r '.[].uid')
      xdg_runtime_path="/run/user/$uid"
      display_var=$(printenv DISPLAY)      
      sudo -u "$user_name" DBUS_SESSION_BUS_ADDRESS=unix:path="$xdg_runtime_path"/bus DISPLAY="$display_var" notify-send "Flatpak Installer" "Started uninstall of some system flatpaks" --app-name="Flatpak Installer" -u NORMAL
}

function notify-send-uninstall {
      user_name=$(loginctl list-sessions --output=json | jq -r '.[].user')
      uid=$(loginctl list-sessions --output=json | jq -r '.[].uid')
      xdg_runtime_path="/run/user/$uid"
      display_var=$(printenv DISPLAY)      
      sudo -u "$user_name" DBUS_SESSION_BUS_ADDRESS=unix:path="$xdg_runtime_path"/bus DISPLAY="$display_var" notify-send "Flatpak Installer" "Finished uninstall of system flatpaks:\n$REMOVE_LIST" --app-name="Flatpak Installer" -u NORMAL
}

# Install flatpaks in list
if [[ -f $INSTALL_LIST_FILE ]] || [[ -f $USER_INSTALL_LIST_FILE ]]; then
  if [[ -n $FLATPAK_LIST ]]; then
    INSTALL_LIST=$(comm -23 <(echo "$COMBINED_INSTALL_LIST" | sort) <(echo "$FLATPAK_LIST" | sort))
  else
    INSTALL_LIST="$COMBINED_INSTALL_LIST"
  fi
  if [[ -n $INSTALL_LIST ]] && [[ ! $NOTIFICATIONS == "true" ]]; then
    flatpak install --system --noninteractive "$REPO_NAME" ${INSTALL_LIST[@]}
  elif  [[ -n $INSTALL_LIST ]] && [[ $NOTIFICATIONS == "true" ]]; then
    notify-send-pre-install
    flatpak install --system --noninteractive "$REPO_NAME" ${INSTALL_LIST[@]}
    notify-send-install
  fi
fi

# Remove flatpaks in list
if [[ -f $REMOVE_LIST_FILE ]] || [[ -f $USER_REMOVE_LIST_FILE ]]; then
  REMOVE_LIST=$(comm -12 <(echo "$COMBINED_REMOVE_LIST" | sort) <(echo "$FLATPAK_LIST" | sort))
  if [[ -n $REMOVE_LIST ]] && [[ ! $NOTIFICATIONS == "true" ]]; then
    flatpak uninstall --system --noninteractive ${REMOVE_LIST[@]}
  elif [[ -n $REMOVE_LIST ]] && [[ $NOTIFICATIONS == "true" ]]; then
    notify-send-pre-uninstall
    flatpak uninstall --system --noninteractive ${REMOVE_LIST[@]}
    notify-send-uninstall
  fi
fi