#!/bin/sh

# Restore the GNOME settings from ~/.config/gnome-settings/*.ini
#
# `dconf load` merges into the existing state, implying
#  that keys removed from the *.ini files would still be active
#  => Reset the subtrees we fully manage first,
#     which makes the resulting state deterministic

set -eu


XDG_CONFIG_HOME="${XDG_CONFIG_HOME:-$HOME/.config}"
XDG_DATA_HOME="${XDG_DATA_HOME:-$HOME/.local/share}"
XDG_STATE_HOME="${XDG_STATE_HOME:-$HOME/.local/state}"

BACKUP_DIR="$XDG_STATE_HOME/gnome-settings-backups"
SETTINGS_DIR="$XDG_CONFIG_HOME/gnome-settings"


# Subtrees either
#  - fully described by the *.ini files
#  - or reset to their defaults
#
# Note: Keep in sync with the `grep`s in ~/.local/bin/verify-dconf
RESET_PATHS="
/ca/desrt/dconf-editor/
/org/freedesktop/ibus/panel/
/org/freedesktop/tracker/
/org/gnome/baobab/
/org/gnome/calculator/
/org/gnome/calendar/
/org/gnome/Characters/
/org/gnome/clocks/
/org/gnome/Connections/
/org/gnome/Contacts/
/org/gnome/control-center/
/org/gnome/desktop/
/org/gnome/Disks/
/org/gnome/evince/
/org/gnome/Extensions/
/org/gnome/file-roller/
/org/gnome/gedit/
/org/gnome/gnome-system-monitor/
/org/gnome/Loupe/
/org/gnome/maps/
/org/gnome/mutter/
/org/gnome/nautilus/
/org/gnome/nm-applet/
/org/gnome/portal/
/org/gnome/settings-daemon/
/org/gnome/shell/
/org/gnome/simple-scan/
/org/gnome/software/
/org/gnome/system/location/
/org/gnome/terminal/
/org/gnome/TextEditor/
/org/gnome/Totem/
/org/gnome/tweaks/
/org/gnome/Weather/
/org/gnome/GWeather4/
/org/gtk/
/system/
"



if ! command -v dconf >/dev/null 2>&1; then
    echo "dconf is not installed => Nothing to do" >&2
    exit 0
fi


if [ ! -d "$SETTINGS_DIR" ]; then
    echo "No settings found at: $SETTINGS_DIR" >&2
    exit 1
fi



echo "Backing up current GNOME settings to: $BACKUP_DIR"

mkdir -p "$BACKUP_DIR"
dconf dump / > "$BACKUP_DIR/$(date +%Y%m%d-%H%M%S).ini"

# Keep the ten most recent backups
# shellcheck disable=SC2012  # File names are timestamps => `ls` is safe
ls -1t "$BACKUP_DIR"/*.ini | tail -n +11 | xargs -r rm --


# Remove temporary background image files
# created by ~/.local/bin/randomize-background
if [ "${FRESH_SESSION:-}" = "1" ]; then
    echo "Removing session-scoped background image files"
    rm -f "$XDG_CONFIG_HOME/gnome-settings/local/temporary_background.ini"
    find "$XDG_DATA_HOME/backgrounds" -name '*-tmp-*.jpg' -delete 2>/dev/null || true
fi


echo "Resetting managed subtrees in dconf"

for path in $RESET_PATHS; do
    echo "  $path"
    dconf reset -f "$path"
done



# forge's `patchCss()` writes its stylesheet backup to a path built from a
# property that no longer exists, yielding "~/undefined.bak"
# => Patch the path in the installed extension
THEME_JS="$XDG_DATA_HOME/gnome-shell/extensions/forge@jmmaranan.com/lib/shared/theme.js"
if [ -w "$THEME_JS" ]; then
    sed -i 's|this\.configMgr\.stylesheetFileName + "\.bak"|configCss.get_path() + ".bak"|' "$THEME_JS"
fi



echo "Import GNOME extensions' schemas"

SCHEMAS="$HOME/.local/bin/import-gnome-extension-schemas"
if [ -x "$SCHEMAS" ]; then
    "$SCHEMAS" || echo "WARN: importing GNOME extension schemas failed" >&2
fi



echo "Loading GNOME settings from: $SETTINGS_DIR"

for file in "$SETTINGS_DIR"/*.ini; do
    [ -e "$file" ] || continue  # because the glob does not expand if empty
    echo "  $(basename "$file")"
    sed "s|/home/user|$HOME|g" "$file" | dconf load /
done

for file in "$SETTINGS_DIR"/local/*.ini; do
    [ -e "$file" ] || continue  # because the glob does not expand if empty
    echo "  $(basename "$file")"
    sed "s|/home/user|$HOME|g" "$file" | dconf load /
done



echo "Patching forge"

# Draw a whitish border on unfocused windows as well

PATCH="$HOME/.local/bin/patch-forge"
if [ -x "$PATCH" ]; then
    "$PATCH" || echo "WARN: forge border patch failed" >&2
fi



echo "Restored GNOME to the defaults defined in ~/.config/gnome-settings"