#!/usr/bin/env bash
set -euo pipefail

# openlist 一键卸载脚本
# 用法：sudo bash uninstall_openlist.sh

INSTALL_DIR="/shumengya/bin/openlist"
SERVICE_NAME="smy-openlist"
SERVICE_FILE="/etc/systemd/system/${SERVICE_NAME}.service"

log() { printf '[openlist-卸载] %s\n' "$*" >&2; }
fail() { log "错误: $*" >&2; exit 1; }

# 进度条函数
show_progress() {
	local pid=$1
	local text=$2
	local delay=0.1
	local spin='-\|/'
	
	printf "[openlist-卸载] %s...  " "$text" >&2
	
	while ps -p "$pid" > /dev/null 2>&1; do
		local temp=${spin#?}
		printf "\b%c" "$spin" >&2
		local spin=$temp${spin%"$temp"}
		sleep $delay
	done
	printf "\b完成\n" >&2
}

require_root() {
	# 必须使用 root 权限执行
	if [ "${EUID:-$(id -u)}" -ne 0 ]; then
		fail "请使用 root 权限运行 (sudo bash uninstall_openlist.sh)"
	fi
}

stop_and_disable_service() {
	# 停止并禁用 systemd 服务
	if systemctl is-active --quiet "$SERVICE_NAME"; then
		log "正在停止服务 $SERVICE_NAME..."
		systemctl stop "$SERVICE_NAME"
	fi
	
	if systemctl is-enabled --quiet "$SERVICE_NAME" 2>/dev/null; then
		log "正在禁用服务 $SERVICE_NAME..."
		systemctl disable "$SERVICE_NAME"
	fi
}

remove_service_file() {
	# 删除 systemd 服务文件
	if [ -f "$SERVICE_FILE" ]; then
		log "正在删除服务文件..."
		rm -f "$SERVICE_FILE"
		systemctl daemon-reload
	fi
}

remove_install_dir() {
	# 删除安装目录
	if [ -d "$INSTALL_DIR" ]; then
		log "正在删除安装目录 $INSTALL_DIR..."
		rm -rf "$INSTALL_DIR"
	fi
}

check_and_kill_port() {
	local port=5244
	if lsof -i :$port >/dev/null 2>&1 || netstat -tunlp | grep -q ":$port "; then
		log "检测到端口 $port 仍被占用，尝试强制清理..."
		fuser -k -n tcp $port >/dev/null 2>&1 || true
		sleep 1
		# 二次检查
		local pid
		pid=$(lsof -t -i:$port 2>/dev/null || true)
		if [ -n "$pid" ]; then
			kill -9 "$pid" 2>/dev/null || true
		fi
	fi
}

main() {
	require_root
	
	log "开始卸载 openlist..."
	(stop_and_disable_service) &
	show_progress $! "正在停止服务"
	
	(remove_service_file) &
	show_progress $! "正在删除服务文件"
	
	check_and_kill_port
	
	(remove_install_dir) &
	show_progress $! "正在删除安装目录"
	
	log "=========================================="
	log "卸载完成! openlist 已从系统中移除"
	log "=========================================="
}

main "$@"