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

type bash &>/dev/null && shtype=bash || shtype=sh 
echo='echo -e' && [ -n "$(echo -e|grep e)" ] && echo=echo

echo "***********************************************"
echo "**                 欢迎使用                  **"
echo "**                ShellClash                 **"
echo "**                             by  Juewuy    **"
echo "***********************************************"
#内置工具
dir_avail(){
	df -h $1 |awk '{ for(i=1;i<=NF;i++){ if(NR==1){ arr[i]=$i; }else{ arr[i]=arr[i]" "$i; } } } END{ for(i=1;i<=NF;i++){ print arr[i]; } }' |grep Ava |awk '{print $2}'
}
setconfig(){
	configpath=$clashdir/mark
	[ -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/ShellClash/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/ShellClash.tar.gz $tarurl
	if [ "$result" != "200" ];then
		$echo "\033[33m文件下载失败！\033[0m"
		error_down
		exit 1
	else
		$clashdir/start.sh stop 2>/dev/null
		#解压
		echo -----------------------------------------------
		echo 开始解压文件！
		mkdir -p $clashdir > /dev/null
		tar -zxvf '/tmp/ShellClash.tar.gz' -C $clashdir/
		if [ $? -ne 0 ];then
			rm -rf /tmp/ShellClash.tar.gz
			$echo "\033[33m文件解压失败！\033[0m"
			error_down
			exit 1
		else
			source $clashdir/init.sh >/dev/null
		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
			$echo "\033[31m输入错误！请重新设置！\033[0m"
			set_usb_dir
		fi
	}
echo -----------------------------------------------
if [ -n "$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"	
		$echo " 1 安装到/data目录(推荐，支持软固化功能)"
		$echo " 2 安装到USB设备(支持软固化功能)"
		[ "$(dir_avail /etc)" != 0 ] && $echo " 3 安装到/etc目录(不推荐)"
		$echo " 0 退出安装"
		echo -----------------------------------------------
		read -p "请输入相应数字 > " num
		case "$num" in 
		1)
			dir=/data
			;;
		2)
			set_usb_dir ;;
		3)
			if [ "$(dir_avail /etc)" != 0 ];then
				dir=/etc
				systype=""
			else
				$echo "\033[31m你的设备不支持安装到/etc目录，已改为安装到/data\033[0m"	
				dir=data
			fi
			;;
		*)
			exit 1 ;;
		esac
	}
	[ "$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(通用，须插入\033[31m任意\033[0mUSB设备)"
		$echo " 2 基于自启脚本安装(仅支持梅林及部分官改固件)"
		$echo " 0 退出安装"
		echo -----------------------------------------------
		read -p "请输入相应数字 > " num
		case "$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 ;;
		*)
			exit 1 ;;
		esac
	}
else
	$echo "\033[33m安装ShellClash至少需要预留约1MB的磁盘空间\033[0m"	
	$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
		echo -----------------------------------------------
		echo '可用路径 剩余空间:'
		df -h | awk '{print $6,$4}'| sed 1d 
		echo '路径是必须带 / 的格式，注意写入虚拟内存(/tmp,/opt,/sys...)的文件会在重启后消失！！！'
		read -p "请输入自定义路径 > " dir
		if [ -z "$dir" ];then
			$echo "\033[31m路径错误！请重新设置！\033[0m"
			setdir
		fi
	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 $dir)"
	read -p "确认安装？(1/0) > " res
	[ "$res" = "1" ] && clashdir=$dir/clash || setdir
fi
}
install(){
echo -----------------------------------------------
echo 开始从服务器获取安装文件！
echo -----------------------------------------------
gettar
echo -----------------------------------------------
echo ShellClash 已经安装成功!
[ "$profile" = "~/.bashrc" ] && echo "请执行【source ~/.bashrc &> /dev/null】命令以加载环境变量！"
[ -n "$(ls -l /bin/sh|grep -oE 'zsh')" ] && echo "请执行【source ~/.zshrc &> /dev/null】命令以加载环境变量！"
echo -----------------------------------------------
$echo "\033[33m输入\033[30;47m clash \033[0;33m命令即可管理！！！\033[0m"
echo -----------------------------------------------
}

#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
#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

#检查更新
url_cdn="https://fastly.jsdelivr.net/gh/juewuy/ShellClash"
[ -z "$url" ] && url=$url_cdn
echo -----------------------------------------------
$echo "\033[33m请选择想要安装的版本：\033[0m"	
$echo " 1 \033[32mShellclash公测版\033[0m"
$echo " 2 \033[36mShellclash稳定版\033[0m"
echo -----------------------------------------------
read -p "请输入相应数字 > " num
if [ -z $num ];then
	echo 安装已取消！ && exit 1;
elif [ "$num" = "2" ];then
	webget /tmp/clashrelease $url_cdn@master/bin/release_version echoon rediroff 2>/tmp/clashrelease
	if [ "$result" = "200" ];then
		release_new=$(cat /tmp/clashrelease | head -1)
		url_dl="$url_cdn@$release_new"
	else
		$echo "\033[33m无法获取稳定版安装地址，将尝试安装公测版！\033[0m"
	fi
fi
[ -z "$url_dl" ] && url_dl=$url
webget /tmp/clashversion "$url_dl/bin/version" echooff
[ "$result" = "200" ] && versionsh=$(cat /tmp/clashversion | grep "versionsh" | awk -F "=" '{print $2}')
[ -z "$release_new" ] && release_new=$versionsh
rm -rf /tmp/clashversion
rm -rf /tmp/clashrelease
tarurl=$url_dl/bin/ShellClash.tar.gz

#输出
$echo "最新版本：\033[32m$release_new\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 "$clashdir" ];then
	echo -----------------------------------------------
	$echo "检测到旧的安装目录\033[36m$clashdir\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 $clashdir
		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