#!/bin/bash

set -e

echoCyan() {
	echo -n -e "\e[96m"
	echo -n "$@"
	echo -e "\e[0m"
}

checkCommand() {
	echo "$@..."
	command -v "$@" > /dev/null 2>&1 || { echo "$@ not found"; exit 1; }
}

echoCyan "Checking prerequisites..."
checkCommand wget
checkCommand 7z
checkCommand sha256sum
checkCommand sed
checkCommand java
echo

echoCyan "Creating temporary directory..."
TEMP_DIR="`mktemp -d`"
if [ -z "${TEMP_DIR}" -o ! -d "${TEMP_DIR}" ]; then
	echo "Could not create temporary directory!"
	exit 1
fi
echo "${TEMP_DIR}"
cd "${TEMP_DIR}"
echo

cleanup() {
	echoCyan "Cleaning up..."
	rm -rfv "${TEMP_DIR}"
}
trap cleanup EXIT

echoCyan "Downloading Szafir Host...."
wget -N "http://www.elektronicznypodpis.pl/gfx/elektronicznypodpis/pl/defaultstronaopisowa/146/1/1/szafirhost.msi"
echo

echoCyan "Verifying checksum..."
echo "26326be947794499266627684e9309941f17780e3a7bab7e5bf48b2417d44842	szafirhost.msi" > SHA256SUM
sha256sum -c SHA256SUM
echo

echoCyan "Extracting data..."
7z x szafirhost.msi
echo

echoCyan "Preparing Chrome Messaging Host adapter..."
CHROME_DIR=szafir-native-messaging-host
mkdir "${CHROME_DIR}"
INSTALL_DIR="${HOME}/.config/chromium/NativeMessagingHosts"
ESCAPED_INSTALL_DIR="${INSTALL_DIR////\\/}"
cp filF5D04DB8D607CF8ECF8B704134B04A67 "${CHROME_DIR}/SzafirHost.jar"
cp filE5B77E2AFEA85AA1CA660D45949DB769 "${CHROME_DIR}/pl.com.kir.szafirhost.json"
sed -i "s/szafir-native-messaging-host\\.bat/${ESCAPED_INSTALL_DIR}\\/szafir-native-messaging-host.sh/" "${CHROME_DIR}/pl.com.kir.szafirhost.json"
cat <<'EOF' > "${CHROME_DIR}/szafir-native-messaging-host.sh"
#!/bin/bash

DIR=`dirname "$0"`
cd "$DIR"
java -jar SzafirHost.jar "$@"
EOF
chmod +x "${CHROME_DIR}/szafir-native-messaging-host.sh"
echo

echoCyan "Installing Chrome Messaging Host adapter..."
mkdir -p "${INSTALL_DIR}"
cp -Rfv "${CHROME_DIR}"/* "${INSTALL_DIR}/"
echo

cleanup
trap - EXIT
echo

echo -n -e "\e[92m"
echo -n "ALL DONE!"
echo -e "\e[0m"
echo
echo -n -e "\e[93m"
echo -n "Remember to copy your PKCS#11 library to /usr/lib!"
echo -e "\e[0m"
echo
echo "Eg. (pue.zus.pl):"
echo "sudo cp ~/local/proCertumSmartSign/libcryptoCertum3PKCS.so /usr/lib/"
echo "Eg. (wfirma.pl):"
echo "sudo cp ~/local/proCertumSmartSign/libcryptoCertum3PKCS.so /usr/lib/cryptoCertumPKCS11.dll"