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

# MengyaMonitor 一键卸载脚本
# 用法：curl -fsSL "https://pan.shumengya.top/d/scripts/mengyamonitor/uninstall_mengyamonitor.sh" | sudo bash

INSTALL_DIR="/shumengya/bin/mengyamonitor"
SERVICE_NAME="smy-mengyamonitor"
BINARY_NAME="mengyamonitor-backend"

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

show_progress() {
	local pid=$1
	local text=$2
	local delay=0.1
	local spin='-\|/'
	
	printf "[MengyaMonitor-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() {
	if [ "${EUID:-$(id -u)}" -ne 0 ]; then
		fail "请使用 root 权限运行 (sudo bash uninstall_mengyamonitor.sh)"
	fi
}

stop_and_disable_service() {
	if systemctl is-active --quiet "${SERVICE_NAME}.service"; then
		systemctl stop "${SERVICE_NAME}.service"
	fi
	
	if systemctl is-enabled --quiet "${SERVICE_NAME}.service" 2>/dev/null; then
		systemctl disable "${SERVICE_NAME}.service"
	fi
}

remove_service_file() {
	local service_file="/etc/systemd/system/${SERVICE_NAME}.service"
	
	if [ -f "$service_file" ]; then
		rm -f "$service_file"
		systemctl daemon-reload
	fi
}

cleanup_process() {
	# 查找并杀掉所有匹配的进程
	local pids
	pids=$(pgrep -f "$BINARY_NAME" || true)
	if [ -n "$pids" ]; then
		kill -9 $pids 2>/dev/null || true
	fi
}

uninstall_main() {
	log "正在卸载 MengyaMonitor ..."
	
	(stop_and_disable_service) &
	show_progress $! "停止服务"
	
	cleanup_process
	
	(remove_service_file) &
	show_progress $! "删除服务文件"
	
	if [ -f "$INSTALL_DIR/$BINARY_NAME" ]; then
		rm -f "$INSTALL_DIR/$BINARY_NAME"
	fi

    # 清理日志文件（可选，这里默认清理）
    if [ -f "/var/log/mengyamonitor.log" ]; then
        rm -f "/var/log/mengyamonitor.log"
        log "已删除日志文件"
    fi
	
	# 如果目录为空，则删除目录
	if [ -d "$INSTALL_DIR" ]; then
		rm -rf "$INSTALL_DIR"
        log "已删除安装目录"
	fi
	
	log "=========================================="
	log "卸载任务完成"
	log "=========================================="
}

main() {
	require_root
    uninstall_main
}

main "$@"