#!/bin/sh
ARCH=$(uname)

check_curl(){
	which curl &> /dev/null 
	if [[ $? -ne 0 ]] ; then
			echo '"curl" binary not found, please install and retry'
			exit 1
	fi
}

check_os() {
	if [ "$ARCH" = "Linux" ] ; then
		TARGET="linux-amd64"
	elif [ "$ARCH" = "Darwin" ] ; then
		TARGET="darwin-amd64"
	else
		echo "Unknown operating system."
		exit 1
	fi
}

generate_url(){
	RELASE_URL="https://api.codenotary.io/foundation/v1/version/vcn/latest"
	curl --connect-timeout 100 -L $RELASE_URL >> release.json
	VERSION=$(grep -o '"release": *"[^"]*"' release.json | grep -o '"[^"]*"$' | tr -d '"')
	URL="https://github.com/codenotary/vcn/releases/download/$VERSION/vcn-$VERSION-$TARGET"
	echo "$URL - $VERSION"
}

install() {
	curl --connect-timeout 100 -L $URL >> vcn
	sudo cp $TMPDIR/vcn /usr/local/bin && sudo chmod +x /usr/local/bin/vcn
}

cleanup() {
  rm $TMPDIR/*
  rmdir $TMPDIR
}

do_install() {
	TMPDIR=$(mktemp -d) && cd $TMPDIR
	check_curl
	check_os
	echo  "";
	echo "CodeNotary vcn CLI - Install"
	echo "----------------------------"
	echo "- Checking for latest release.." 
	generate_url
	echo "- Downloading and installing vcn $VERSION for you..."
	install
	cleanup
	echo "";
	echo "🎉 Done."
	echo "You can run now: $ vcn"
}

# wrapped up in a function so that we have some protection against only getting
# half the file during "curl | sh"
do_install