#!/bin/sh

EXEDIR="$(dirname "$0")"
EXEDIR="$(cd "$EXEDIR"; pwd)"
BINS=binaries
BINDIR="$EXEDIR/$BINS"

ZAPRET_BASE=${ZAPRET_BASE:-"$EXEDIR"}
. "$ZAPRET_BASE/common/base.sh"

check_dir()
{
	local dir="$BINDIR/$1"
	local exe="$dir/ip2net"
	local out
	if [ -f "$exe" ]; then
		if [ -x "$exe" ]; then
			# ash and dash try to execute invalid executables as a script. they interpret binary garbage with possible negative consequences
			# bash and zsh do not do this
			if exists bash; then
				out=$(echo 0.0.0.0 | bash -c "\"$exe"\" 2>/dev/null)
			elif exists zsh; then
				out=$(echo 0.0.0.0 | zsh -c "\"$exe\"" 2>/dev/null)
			else
				# find does not use its own shell exec
				# it uses execvp(). in musl libc it does not call shell, in glibc it DOES call /bin/sh
				# that's why prefer bash or zsh if present. otherwise it's our last chance
				local FIND=find
				if ! exists find && exists busybox; then
					FIND="busybox find"
				fi
				out=$(echo 0.0.0.0 | $FIND "$dir" -maxdepth 1 -name ip2net -exec {} \; 2>/dev/null)
			fi
			[ -n "$out" ]
		else
			echo >&2 "$exe is not executable. set proper chmod."
			return 1
		fi
	else
		echo >&2 "$exe is absent"
		return 2
	fi
}

# link or copy executables. uncomment either ln or cp, comment other
ccp()
{
	local F="$(basename "$1")"
	[ -d "$ZAPRET_BASE/$2" ] || mkdir "$ZAPRET_BASE/$2"
	[ -f "$ZAPRET_BASE/$2/$F" ] && rm -f "$ZAPRET_BASE/$2/$F"
	ln -fs "../$BINS/$1" "$ZAPRET_BASE/$2" && echo linking : "../$BINS/$1" =\> "$ZAPRET_BASE/$2"
	#cp -f "../$BINS/$1" "$ZAPRET_BASE/$2" && echo copying : "../$BINS/$1" =\> "$ZAPRET_BASE/$2"
}

UNAME=$(uname)
unset PKTWS
case $UNAME in
	Linux)
		ARCHLIST="my x86_64 x86 aarch64 arm mips64r2-msb mips32r1-lsb mips32r1-msb lexra ppc"
		PKTWS=nfqws
		;;
	Darwin)
		ARCHLIST="my mac64"
		;;
	FreeBSD)
		ARCHLIST="my freebsd-x64"
		PKTWS=dvtws
		;;
	CYGWIN*)
		UNAME=CYGWIN
		ARCHLIST="win64 win32"
		PKTWS=winws
		;;
	*)
		ARCHLIST="my"
esac

if [ "$1" = "getarch" ]; then
	for arch in $ARCHLIST
	do
		[ -d "$BINDIR/$arch" ] || continue
		if check_dir $arch; then
	 		echo $arch
	 		exit 0
	 	fi
	done
else
	for arch in $ARCHLIST
	do
		[ -d "$BINDIR/$arch" ] || continue
		if check_dir $arch; then
			echo $arch is OK
			echo installing binaries ...
			ccp $arch/ip2net ip2net
			ccp $arch/mdig mdig
			[ -n "$PKTWS" ] && ccp $arch/$PKTWS nfq
			[ "$UNAME" = CYGWIN ] || ccp $arch/tpws tpws
	 		exit 0
		else
			echo $arch is NOT OK
		fi
	done
	echo no compatible binaries found
fi

exit 1