#! /bin/bash

script_dir=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )

# Data directory to dump smartctl output
# This directory will be created if it doesn't exist
data_dir="${script_dir}/smartctl-data"

# The original script used --xall but that doesn't work
# This matches the command in readSMARTctl()
smartctl_args="--json --info --health --attributes --tolerance=verypermissive --nocheck=standby --format=brief --log=error"

# Determine the json query tool to use
if command -v jq >/dev/null; then
	json_tool="jq"
	json_args="--raw-output"
elif command -v yq >/dev/null; then
	json_tool="yq"
	json_args="--unwrapScalar"
else
	echo "One of 'yq' or 'jq' is required. Please try again after installing one of them"
	exit 1
fi

if [[ $UID != 0 ]] && ! command -v sudo >/dev/null; then
	# Not root and sudo doesn't exist
	echo "sudo does not exist. Please run this as root"
	exit 1
fi

SUDO="sudo"
if [[ $UID = 0 ]]; then
	# Don't use sudo if root
	SUDO=""
fi

[[ ! -d "${data_dir}" ]] && mkdir --parents "${data_dir}"

if [[ $# -ne 0 ]]; then
	devices="$1"
else
	devices=$(smartctl --scan --json | $json_tool $json_args '.devices[].name')
fi

for device in $devices; do
	echo -n "Collecting data for '${device}'..."
	data=$($SUDO smartctl $smartctl_args "${device}")
	type=$(echo "${data}" | $json_tool $json_args '.device.type')
	family=$(echo "${data}" | $json_tool $json_args '.model_family' | tr ' ' '_')
	model=$(echo "${data}" | $json_tool $json_args '.model_name' | tr ' ' '_')
	device_name=$(basename "${device}")
	echo -e "\tSaving to ${type}-${family}-${model}-${device_name}.json"
	echo "${data}" > "${data_dir}/${type}-${family}-${model}-${device_name}.json"
done