#!/bin/bash
LC_NUMERIC="en_US.utf-8"
CacheFile="/tmp/coinindex.json"
CacheFile2="/tmp/usd-nok.csv"
ApiURL="https://www.worldcoinindex.com/apiservice/json?key=srko6KyVB4VgtbfKsCKQibWe7Y6rjEcgN93"
ApiURL2="https://data.norges-bank.no/api/data/EXR/B.USD.NOK.SP.A?lastNObservations=1&format=csv-:-tab-false-y"
CacheTime="150" # 150 seconds = 2.5 minutes
NumberRegex="^[0-9]+([.][0-9]+)?$"

if [ -z ${1+x} ]; then
  Value=1
else
  Value=${1}
fi

if ! [[ ${Value} =~ ${NumberRegex} ]]; then
  echo "+++ OUT OF CHEESE ERROR +++"
  exit 1
fi

if [ -f ${CacheFile} ]; then
  if [ $(stat --format=%Y ${CacheFile}) -le $(( $(date +%s) - ${CacheTime} )) ]; then
    wget -q -O ${CacheFile} ${ApiURL}
    wget -q -O ${CacheFile2} ${ApiURL2}
  fi
else
  wget -q -O ${CacheFile} ${ApiURL}
  wget -q -O ${CacheFile2} ${ApiURL2}
fi

PriceZECinUSD="$(jq '.Markets | .[] | select(.Name=="Zcash") | .Price_usd' ${CacheFile})"
PriceUSDinNOK="$(tail -n 1 ${CacheFile2} | cut -f 2 | tr -d \")"
PriceZECinNOK="$(echo "${PriceZECinUSD}*${PriceUSDinNOK}" | bc)"
PriceZECinUSDPretty="$(printf "%0.2f\n" $PriceZECinUSD)"
PriceZECinNOKPretty="$(printf "%0.2f\n" $PriceZECinNOK)"

ValueUSD="$(echo "${PriceZECinUSD}*${Value}" | bc | sed 's/^\./0./')"
ValueNOK="$(echo "${PriceZECinNOK}*${Value}" | bc | sed 's/^\./0./')"
ValueUSDPretty="$(printf "%0.4f\n" $ValueUSD)"
ValueNOKPretty="$(printf "%0.4f\n" $ValueNOK)"

if [ -z ${1+x} ]; then
  echo "${Value} ZEC = \$ ${ValueUSDPretty} (about NOK ${ValueNOKPretty})"
else
  echo "${Value} ZEC = \$ ${ValueUSDPretty} (about NOK ${ValueNOKPretty}) (1 ZEC = \$ ${PriceZECinUSDPretty} / NOK ${PriceZECinNOKPretty})"
fi