#!/usr/bin/env bash

#colors
help() {
	cat <<EOF

ssh-serve-files

usage: ssh-serve-files [user@]hostname [-p port] [-d dir]

optional flags:
  -h, --help  show this help text
  -p, --port   port to tunnel and start http server at
  -d, --dir    directory of files to serve [default: ~/]
EOF
}

if [[ $# -eq 0 ]]; then
	echo "please provide [user@]hostname"
	help
	exit 1
fi

PORT=8090
DIR="~/"

USER_HOST=$1
shift

while [[ $1 =~ ^- && $1 != "--" ]]; do
	echo checking $1
	case $1 in
	-h | --help)
		help
		exit 0
		;;
	-p | --port)
		shift
		PORT=${PORT:+$1}
		;;
	-d | --dir)
		shift
		DIR=${DIR:+$1}
		;;
	-* | --*)
		echo "Invalid option: $opt"
		help
		exit 1
		;;
	esac
	shift
done

URL="http://localhost:$PORT"

echo "connecting to $USER_HOST with port $PORT"
echo "serving directory:"
echo "->>$DIR"

echo "opening $URL using $BROWSER"
$BROWSER $URL > /dev/null 2>&1 &

# first change directory in case python<3.7
ssh -tL localhost:$PORT:localhost:$PORT $USER_HOST \
	"cd $DIR && python3 -m http.server $PORT"