#!/usr/bin/env bash
# SPDX-FileCopyrightText: 2026 Stan Grams <sjg@haxx.space>
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# Reverse script/install.sh: stop and remove the systemd user services and the
# installed binaries. User config (~/.config/trx-rs) is left in place unless
# --purge is given.

set -euo pipefail

BINARIES=(trx-server trx-client trx-configurator)

PREFIX="${PREFIX:-$HOME/.local}"
BINDIR="${BINDIR:-}"
PURGE=0

CONFIG_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/trx-rs"
UNIT_DIR="${XDG_CONFIG_HOME:-$HOME/.config}/systemd/user"

usage() {
    cat <<EOF
Usage: script/uninstall.sh [options]

Options:
  --prefix DIR   Install prefix binaries were installed under (default: \$HOME/.local)
  --bindir DIR   Directory binaries were installed to (overrides --prefix)
  --purge        Also delete the user config directory ($CONFIG_DIR)
  -h, --help     Show this help
EOF
}

while [ $# -gt 0 ]; do
    case "$1" in
        --prefix) PREFIX="$2"; shift 2 ;;
        --bindir) BINDIR="$2"; shift 2 ;;
        --purge) PURGE=1; shift ;;
        -h|--help) usage; exit 0 ;;
        *) echo "error: unknown option '$1'" >&2; usage >&2; exit 2 ;;
    esac
done

[ -n "$BINDIR" ] || BINDIR="$PREFIX/bin"

log() { printf '\033[1;32m==>\033[0m %s\n' "$*"; }

need_sudo() {
    local dir="$1"
    while [ ! -e "$dir" ]; do dir="$(dirname "$dir")"; done
    [ -w "$dir" ] && return 1 || return 0
}

# --- Stop and remove user services -----------------------------------------
if command -v systemctl >/dev/null 2>&1; then
    log "Stopping and disabling user services…"
    systemctl --user disable --now trx-client.service trx-server.service 2>/dev/null || true
fi
for unit in trx-client trx-server; do
    if [ -e "$UNIT_DIR/$unit.service" ]; then
        rm -f "$UNIT_DIR/$unit.service"
        log "removed $UNIT_DIR/$unit.service"
    fi
done
if command -v systemctl >/dev/null 2>&1; then
    systemctl --user daemon-reload || true
fi

# --- Remove binaries --------------------------------------------------------
SUDO=""
if need_sudo "$BINDIR"; then SUDO="sudo"; fi
for b in "${BINARIES[@]}"; do
    if [ -e "$BINDIR/$b" ]; then
        $SUDO rm -f "$BINDIR/$b"
        log "removed $BINDIR/$b"
    fi
done

# --- Optionally purge config ------------------------------------------------
if [ "$PURGE" -eq 1 ]; then
    rm -rf "$CONFIG_DIR"
    log "purged $CONFIG_DIR"
else
    log "Left config in place: $CONFIG_DIR (use --purge to delete)"
fi

log "Done."