#!/bin/bash
# This file is in the public domain.
#
# This script configure libeufin-bank and libeufin-nexus.


set -eu

source functions.sh
source config/user.conf
source config/internal.conf

say "Beginning LibEuFin setup"

if test -z "${BANK_NAME:-}"; then
  say "Error: config/user.conf does not specify BANK_NAME"
  exit 1
fi
if test -z "${DOMAIN_NAME:-}"; then
  say "Error: config/user.conf does not specify DOMAIN_NAME"
  exit 1
fi
if test -z "${BANK_ADMIN_PASSWORD:-}"; then
  say "Error: config/user.conf does not specify BANK_ADMIN_PASSWORD"
  exit 1
fi
if test -z "${BANK_EXCHANGE_PASSWORD:-}"; then
  say "Error: config/user.conf does not specify BANK_EXCHANGE_PASSWORD"
  exit 1
fi

if test ${DO_CONVERSION} == y; then
  say "Configuring libeufin-nexus with ${FIAT_CURRENCY}..."

  taler-config -s nexus-ebics -o CURRENCY \
    -V "$FIAT_CURRENCY" -c /etc/libeufin/libeufin-nexus.conf
  taler-config -s nexus-ebics -o IBAN \
    -V "$FIAT_ACCOUNT_IBAN" -c /etc/libeufin/libeufin-nexus.conf
  taler-config -s nexus-ebics -o BIC \
    -V "$FIAT_ACCOUNT_BIC" -c /etc/libeufin/libeufin-nexus.conf
  taler-config -s nexus-ebics -o NAME \
    -V "$FIAT_ACCOUNT_NAME" -c /etc/libeufin/libeufin-nexus.conf
fi


say "Configuring libeufin-bank with ${CURRENCY}..."

cat >/etc/libeufin/libeufin-bank.conf <<EOF
[libeufin-bank]
CURRENCY=${CURRENCY}
NAME="${BANK_NAME}"
WIRE_TYPE=x-taler-bank
X_TALER_BANK_PAYTO_HOSTNAME=bank.${DOMAIN_NAME}
SUGGESTED_WITHDRAWAL_EXCHANGE=${PROTO}://exchange.${DOMAIN_NAME}/
SERVE=tcp
PORT=${BANK_PORT}
EOF

if test ${DO_CONVERSION} == y; then
  cat >>/etc/libeufin/libeufin-bank.conf <<EOF 
ALLOW_CONVERSION=yes
FIAT_CURRENCY=${FIAT_CURRENCY}
ALLOW_EDIT_CASHOUT_PAYTO_URI=yes
EOF
fi

if test -n "${TELESIGN_AUTH_TOKEN:-}"; then
  cat >>/etc/libeufin/libeufin-bank.conf <<EOF 
TAN_SMS=libeufin-tan-sms.sh
TAN_SMS_ENV={"AUTH_TOKEN":"$TELESIGN_AUTH_TOKEN"}
EOF
fi

say "Setting up libeufin database..."

libeufin-dbconfig &>> setup.log

say "Setting up libeufin-bank..."


say "Setting up libeufin-bank admin account..."
sudo -u libeufin-bank \
  libeufin-bank passwd \
  -c /etc/libeufin/libeufin-bank.conf \
  admin "${BANK_ADMIN_PASSWORD}" &>> setup.log

say "Setting up admin's debt limit..."
sudo -u libeufin-bank \
  libeufin-bank edit-account \
  -c /etc/libeufin/libeufin-bank.conf \
  admin --debit_threshold=${CURRENCY}:200000000 &>> setup.log

say "Setting up SPA configuration..."
echo "settings = { bankName: \"${BANK_NAME}\" }" >/etc/libeufin/settings.js

say "Create exchange account..."
if test -z "${EXCHANGE_PAYTO:-}"; then
  EXCHANGE_PAYTO_NEW="$(sudo -u libeufin-bank libeufin-bank create-account -c /etc/libeufin/libeufin-bank.conf --username exchange --password "${BANK_EXCHANGE_PASSWORD}" --name Exchange --exchange 2>> setup.log)?receiver-name=Exchange"
  echo "EXCHANGE_PAYTO=\"${EXCHANGE_PAYTO_NEW}\"" >> config/internal.conf
fi

if test -z "${EXCHANGE_WIRE_GATEWAY_URL:-}"; then
  EXCHANGE_WIRE_GATEWAY_URL_NEW="${PROTO}://bank.$DOMAIN_NAME/accounts/exchange/taler-wire-gateway/"
  echo "EXCHANGE_WIRE_GATEWAY_URL=\"${EXCHANGE_WIRE_GATEWAY_URL_NEW}\"" >> config/internal.conf
fi

say "Start the bank..."
systemctl enable libeufin-bank &>> setup.log
systemctl restart libeufin-bank &>> setup.log

say "Waiting for the bank (/config)..."
curl -sS --max-time 2 \
  --retry-all-errors \
  --retry-delay 2 \
  --retry 10 \
  ${PROTO}://bank.${DOMAIN_NAME}/config &>> setup.log

if test ${DO_CONVERSION} == y; then
say "Setting conversion rates to 1:1 ..."
# TODO only set conversion rates if known have been set
curl -sS -u "admin:${BANK_ADMIN_PASSWORD}" \
  -H 'Content-Type: application/json; charset=utf-8' \
  ${PROTO}://bank.${DOMAIN_NAME}/conversion-info/conversion-rate \
--data-binary @- &>> setup.log << EOF
{
  "cashin_ratio": "1",
  "cashin_fee": "${CURRENCY}:0",
  "cashin_tiny_amount": "${CURRENCY}:0.01",
  "cashin_rounding_mode": "nearest",
  "cashin_min_amount": "${FIAT_CURRENCY}:1",
  "cashout_ratio": "1",
  "cashout_fee": "${FIAT_CURRENCY}:0",
  "cashout_tiny_amount": "${FIAT_CURRENCY}:0.01",
  "cashout_rounding_mode": "nearest",
  "cashout_min_amount": "${CURRENCY}:1"
}
EOF
fi

say "LibEuFin setup finished"