#!/bin/sh
# Remove socktop-swipe.
#
#   ./uninstall.sh                 binary, config, udev rule, X snippets, autologin
#   ./uninstall.sh --keep-config   leave the config file alone
#
# The Rust toolchain, tmux, socktop and friends, and your 'input' group
# membership are all left in place: they are useful independently, and removing
# them could break something else. What was skipped is printed at the end.
set -eu

PREFIX=${PREFIX:-/usr/local}
BIN="$PREFIX/bin/socktop-swipe"
CONF_DIR="$HOME/.config/socktop-swipe"
CONF="$CONF_DIR/config.yaml"
UDEV=/etc/udev/rules.d/70-socktop-swipe.rules
XBLANK=/etc/X11/xorg.conf.d/10-no-blanking-socktop-swipe.conf
XIGNORE=/etc/X11/xorg.conf.d/99-ignore-touch-socktop-swipe.conf
LIGHTDM=/etc/lightdm/lightdm.conf.d/50-autologin-socktop-swipe.conf
UNIT="$HOME/.config/systemd/user/socktop-swipe.service"

keep_config=no
for a in "$@"; do
	case "$a" in
	--keep-config) keep_config=yes ;;
	-h | --help) sed -n '2,10p' "$0" | sed 's/^# \{0,1\}//'; exit 0 ;;
	*) echo "unknown option: $a" >&2; exit 2 ;;
	esac
done

say() { printf '%s\n' "$*"; }

# Stop it first, so nothing is holding the touch device or the tmux session.
if command -v systemctl >/dev/null 2>&1 && [ -e "$UNIT" ]; then
	systemctl --user disable --now socktop-swipe 2>/dev/null || true
	rm -f "$UNIT"
	systemctl --user daemon-reload 2>/dev/null || true
	say "removed $UNIT"
fi
pkill -x socktop-swipe 2>/dev/null || true

# Session name comes from the config, which may be about to be deleted.
if [ -r "$CONF" ] && command -v tmux >/dev/null 2>&1; then
	session=$(sed -n 's/^session:[[:space:]]*//p' "$CONF" | head -1)
	[ -n "${session:-}" ] || session=socktop-swipe
	tmux kill-session -t "$session" 2>/dev/null || true
fi

for f in "$BIN" "$UDEV" "$XBLANK" "$XIGNORE" "$LIGHTDM"; do
	if [ -e "$f" ]; then
		sudo rm -f "$f"
		say "removed $f"
	fi
done

if [ -e "$UDEV" ] || command -v udevadm >/dev/null 2>&1; then
	sudo udevadm control --reload 2>/dev/null || true
fi

if [ "$keep_config" = no ] && [ -e "$CONF" ]; then
	rm -f "$CONF"
	rmdir "$CONF_DIR" 2>/dev/null || true
	say "removed $CONF"
fi

say ""
say "Left in place on purpose:"
say "  * the Rust toolchain   -- remove with: rustup self uninstall"
say "  * tmux                 -- your package manager installed it"
say "  * socktop and friends  -- cargo uninstall socktop uptime-kuma-status"
say "  * the source checkout  -- rm -rf ~/.local/src/socktop-swipe"
say "  * 'input' group        -- sudo gpasswd -d $(id -un) input"
say "  * i3 autostart         -- delete the 'socktop-swipe' block in ~/.config/i3/config"
say ""
say "Screen blanking and the login prompt come back after the next X restart"
say "or reboot."