#! /bin/bash
# Copyright (C) Juewuy

[ -z "$url" ] && url="https://fastly.jsdelivr.net/gh/juewuy/ShellCrash@master"
type bash &>/dev/null && shtype=bash || shtype=sh
echo='echo -e'
[ -n "$(echo -e | grep e)" ] && {
	echo "\033[31m不支持dash环境安装！请先输入bash命令后再运行安装命令！\033[0m"
	exit
}

echo "***********************************************"
echo "**                 欢迎使用                  **"
echo "**                ShellCrash                 **"
echo "**                             by  Juewuy    **"
echo "***********************************************"
#内置工具
dir_avail() {
	df $2 $1 | awk '{ for(i=1;i<=NF;i++){ if(NR==1){ arr[i]=$i; }else{ arr[i]=arr[i]" "$i; } } } END{ for(i=1;i<=NF;i++){ print arr[i]; } }' | grep -E 'Ava|可用' | awk '{print $2}'
}
setconfig() {
	configpath=$CRASHDIR/configs/ShellCrash.cfg
	[ -n "$(grep ${1} $configpath)" ] && sed -i "s#${1}=.*#${1}=${2}#g" $configpath || echo "${1}=${2}" >>$configpath
}
webget() {
	#参数【$1】代表下载目录，【$2】代表在线地址
	#参数【$3】代表输出显示，【$4】不启用重定向
	if curl --version >/dev/null 2>&1; then
		[ "$3" = "echooff" ] && progress='-s' || progress='-#'
		[ -z "$4" ] && redirect='-L' || redirect=''
		result=$(curl -w %{http_code} --connect-timeout 5 $progress $redirect -ko $1 $2)
		[ -n "$(echo $result | grep -e ^2)" ] && result="200"
	else
		if wget --version >/dev/null 2>&1; then
			[ "$3" = "echooff" ] && progress='-q' || progress='-q --show-progress'
			[ "$4" = "rediroff" ] && redirect='--max-redirect=0' || redirect=''
			certificate='--no-check-certificate'
			timeout='--timeout=3'
		fi
		[ "$3" = "echoon" ] && progress=''
		[ "$3" = "echooff" ] && progress='-q'
		wget $progress $redirect $certificate $timeout -O $1 $2
		[ $? -eq 0 ] && result="200"
	fi
}
error_down() {
	$echo "请参考 \033[32mhttps://github.com/juewuy/ShellCrash/blob/master/README_CN.md"
	$echo "\033[33m使用其他安装源重新安装！\033[0m"
}
#安装及初始化
gettar() {
	webget /tmp/ShellCrash.tar.gz "$url/bin/ShellCrash.tar.gz"
	if [ "$result" != "200" ]; then
		$echo "\033[33m文件下载失败！\033[0m"
		error_down
		exit 1
	else
		$CRASHDIR/start.sh stop 2>/dev/null
		#解压
		echo -----------------------------------------------
		echo 开始解压文件！
		mkdir -p $CRASHDIR >/dev/null
		tar -zxf '/tmp/ShellCrash.tar.gz' -C $CRASHDIR/ || tar -zxf '/tmp/ShellCrash.tar.gz' --no-same-owner -C $CRASHDIR/
		if [ -s $CRASHDIR/init.sh ]; then
			. $CRASHDIR/init.sh >/dev/null || $echo "\033[33m初始化失败，请尝试本地安装！\033[0m"
		else
			rm -rf /tmp/ShellCrash.tar.gz
			$echo "\033[33m文件解压失败！\033[0m"
			error_down
			exit 1
		fi
	fi
}
setdir() {
	set_usb_dir() {
		$echo "请选择安装目录"
		du -hL /mnt | awk '{print " "NR" "$2"  "$1}'
		read -p "请输入相应数字 > " num
		dir=$(du -hL /mnt | awk '{print $2}' | sed -n "$num"p)
		if [ -z "$dir" ]; then
			$echo "\033[31m输入错误！请重新设置！\033[0m"
			set_usb_dir
		fi
	}
	set_asus_dir() {
		echo -e "请选择U盘目录"
		du -hL /tmp/mnt | awk '{print " "NR" "$2"  "$1}'
		read -p "请输入相应数字 > " num
		dir=$(du -hL /tmp/mnt | awk '{print $2}' | sed -n "$num"p)
		if [ ! -f "$dir/asusware.arm/etc/init.d/S50downloadmaster" ]; then
			echo -e "\033[31m未找到下载大师自启文件：$dir/asusware.arm/etc/init.d/S50downloadmaster，请检查设置！\033[0m"
			set_asus_dir
		fi
	}
	set_cust_dir() {
		echo -----------------------------------------------
		echo '可用路径 剩余空间:'
		df -h | awk '{print $6,$4}' | sed 1d
		echo '路径是必须带 / 的格式，注意写入虚拟内存(/tmp,/opt,/sys...)的文件会在重启后消失！！！'
		read -p "请输入自定义路径 > " dir
		if [ "$(dir_avail $dir)" = 0 ] || [ -n "$(echo $dir |grep -E 'tmp|opt|sys')" ]; then
			$echo "\033[31m路径错误！请重新设置！\033[0m"
			set_cust_dir
		fi
	}
	echo -----------------------------------------------
	$echo "\033[33m注意：安装ShellCrash至少需要预留约1MB的磁盘空间\033[0m"
	if [ -n "$systype" ]; then
		[ "$systype" = "Padavan" ] && dir=/etc/storage
		[ "$systype" = "mi_snapshot" ] && {
			$echo "\033[33m检测到当前设备为小米官方系统，请选择安装位置\033[0m"
			[ "$(dir_avail /data)" -gt 256 ] && $echo " 1 安装到 /data 目录(推荐，支持软固化功能)"
			[ "$(dir_avail /userdisk)" -gt 256 ] && $echo " 2 安装到 /userdisk 目录(推荐，支持软固化功能)"
			$echo " 3 安装到自定义目录(不推荐，不明勿用！)"
			$echo " 0 退出安装"
			echo -----------------------------------------------
			read -p "请输入相应数字 > " num
			case "$num" in
			1)
				dir=/data
				;;
			2)
				dir=/userdisk
				;;
			3)
				set_cust_dir
				;;
			*)
				exit 1
				;;
			esac
		}
		[ "$systype" = "asusrouter" ] && {
			$echo "\033[33m检测到当前设备为华硕固件，请选择安装方式\033[0m"
			$echo " 1 基于USB设备安装(限23年9月之前固件，须插入\033[31m任意\033[0mUSB设备)"
			$echo " 2 基于自启脚本安装(仅支持梅林及部分非koolshare官改固件)"
			$echo " 3 基于U盘+下载大师安装(支持所有固件，限ARM设备，须插入U盘或移动硬盘)"
			$echo " 0 退出安装"
			echo -----------------------------------------------
			read -p "请输入相应数字 > " num
			case "$num" in
			1)
				read -p "将脚本安装到USB存储/系统闪存？(1/0) > " res
				[ "$res" = "1" ] && set_usb_dir || dir=/jffs
				usb_status=1
				;;
			2)
				$echo "如无法正常开机启动，请重新使用USB方式安装！"
				sleep 2
				dir=/jffs
				;;
			3)
				echo -e "请先在路由器网页后台安装下载大师并启用，之后选择外置存储所在目录！"
				sleep 2
				set_asus_dir
				;;
			*)
				exit 1
				;;
			esac
		}
		[ "$systype" = "ng_snapshot" ] && dir=/tmp/mnt
	else
		$echo " 1 在\033[32m/etc目录\033[0m下安装(适合root用户)"
		$echo " 2 在\033[32m/usr/share目录\033[0m下安装(适合Linux系统)"
		$echo " 3 在\033[32m当前用户目录\033[0m下安装(适合非root用户)"
		$echo " 4 在\033[32m外置存储\033[0m中安装"
		$echo " 5 手动设置安装目录"
		$echo " 0 退出安装"
		echo -----------------------------------------------
		read -p "请输入相应数字 > " num
		#设置目录
		if [ -z $num ]; then
			echo 安装已取消
			exit 1
		elif [ "$num" = "1" ]; then
			dir=/etc
		elif [ "$num" = "2" ]; then
			dir=/usr/share
		elif [ "$num" = "3" ]; then
			dir=~/.local/share
			mkdir -p ~/.config/systemd/user
		elif [ "$num" = "4" ]; then
			set_usb_dir
		elif [ "$num" = "5" ]; then
			set_cust_dir
		else
			echo 安装已取消！！！
			exit 1
		fi
	fi

	if [ ! -w $dir ]; then
		$echo "\033[31m没有$dir目录写入权限！请重新设置！\033[0m" && sleep 1 && setdir
	else
		$echo "目标目录\033[32m$dir\033[0m空间剩余：$(dir_avail $dir -h)"
		read -p "确认安装？(1/0) > " res
		[ "$res" = "1" ] && CRASHDIR=$dir/ShellCrash || setdir
	fi
}
install() {
	echo -----------------------------------------------
	echo 开始从服务器获取安装文件！
	echo -----------------------------------------------
	gettar
	echo -----------------------------------------------
	echo ShellCrash 已经安装成功!
	[ "$profile" = "~/.bashrc" ] && echo "请执行【. ~/.bashrc &> /dev/null】命令以加载环境变量！"
	[ -n "$(ls -l /bin/sh | grep -oE 'zsh')" ] && echo "请执行【. ~/.zshrc &> /dev/null】命令以加载环境变量！"
	echo -----------------------------------------------
	$echo "\033[33m输入\033[30;47m crash \033[0;33m命令即可管理！！！\033[0m"
	echo -----------------------------------------------
}
setversion() {
	echo -----------------------------------------------
	$echo "\033[33m请选择想要安装的版本：\033[0m"
	$echo " 1 \033[32m公测版(推荐)\033[0m"
	$echo " 2 \033[36m稳定版\033[0m"
	$echo " 3 \033[31m开发版\033[0m"
	echo -----------------------------------------------
	read -p "请输入相应数字 > " num
	case "$num" in
	2)
		url=$(echo $url | sed 's/master/stable/')
		;;
	3)
		url=$(echo $url | sed 's/master/dev/')
		;;
	*) ;;
	esac
}
#特殊固件识别及标记
[ -f "/etc/storage/started_script.sh" ] && {
	systype=Padavan #老毛子固件
	initdir='/etc/storage/started_script.sh'
}
[ -d "/jffs" ] && {
	systype=asusrouter #华硕固件
	[ -f "/jffs/.asusrouter" ] && initdir='/jffs/.asusrouter'
	[ -d "/jffs/scripts" ] && initdir='/jffs/scripts/nat-start'
}
[ -f "/data/etc/crontabs/root" ] && systype=mi_snapshot #小米设备
[ -w "/var/mnt/cfg/firewall" ] && systype=ng_snapshot   #NETGEAR设备

#检查root权限
if [ "$USER" != "root" -a -z "$systype" ]; then
	echo 当前用户:$USER
	$echo "\033[31m请尽量使用root用户（不要直接使用sudo命令！）执行安装!\033[0m"
	echo -----------------------------------------------
	read -p "仍要安装？可能会产生未知错误！(1/0) > " res
	[ "$res" != "1" ] && exit 1
fi

if [ -n "$(echo $url | grep master)" ]; then
	setversion
fi
#获取版本信息
webget /tmp/version "$url/bin/version" echooff
[ "$result" = "200" ] && versionsh=$(cat /tmp/version | grep "versionsh" | awk -F "=" '{print $2}')
rm -rf /tmp/version

#输出
$echo "最新版本：\033[32m$versionsh\033[0m"
echo -----------------------------------------------
$echo "\033[44m如遇问题请加TG群反馈：\033[42;30m t.me/ShellClash \033[0m"
$echo "\033[37m支持各种基于openwrt的路由器设备"
$echo "\033[33m支持Debian、Centos等标准Linux系统\033[0m"

if [ -n "$CRASHDIR" ]; then
	echo -----------------------------------------------
	$echo "检测到旧的安装目录\033[36m$CRASHDIR\033[0m，是否覆盖安装？"
	$echo "\033[32m覆盖安装时不会移除配置文件！\033[0m"
	read -p "覆盖安装/卸载旧版本？(1/0) > " res
	if [ "$res" = "1" ]; then
		install
	elif [ "$res" = "0" ]; then
		rm -rf $CRASHDIR
		echo -----------------------------------------------
		$echo "\033[31m 旧版本文件已卸载！\033[0m"
		setdir
		install
	elif [ "$res" = "9" ]; then
		echo 测试模式，变更安装位置
		setdir
		install
	else
		$echo "\033[31m输入错误！已取消安装！\033[0m"
		exit 1
	fi
else
	setdir
	install
fi