#!/usr/bin/env bash
# Helper to enable a bank account for the exchange via taler-exchange-offline.
# Run this inside the exchange container (where the master private key lives).
# Requires taler-exchange-offline and a valid master key in the secrets path.

set -euo pipefail

EXCHANGE_CONFIG="${EXCHANGE_CONFIG:-/etc/taler/taler-exchange.conf}"
PAYTO_URI="${PAYTO_URI:-payto://x-taler-bank/ob.antifa.ltd/demogeld?receiver-name=demogeld}"
OUT="${ENABLE_ACCOUNT_JSON:-/tmp/enable-account.json}"
EXCHANGE_KEYS_URL="${EXCHANGE_KEYS_URL:-http://exchange:8081/keys}"
EXCHANGE_WAIT_RETRIES="${EXCHANGE_WAIT_RETRIES:-60}"
EXCHANGE_WAIT_INTERVAL="${EXCHANGE_WAIT_INTERVAL:-2}"
EXCHANGE_CURL_OPTS="${EXCHANGE_CURL_OPTS:-}"

render_template() {
  local src="$1"
  local dst="$2"
  if [[ -f "${src}" ]]; then
    echo "Rendering template ${src} -> ${dst}"
    envsubst < "${src}" > "${dst}"
  fi
}

render_template /etc/taler/taler-exchange.conf.tmpl /etc/taler/taler-exchange.conf
render_template /etc/taler/conf.d/99-exchange.conf.tmpl /etc/taler/conf.d/99-exchange.conf

enabled_flag="${ENABLE_EXCHANGE_ACCOUNT:-0}"
case "${enabled_flag,,}" in
  1|true|yes|on) ;;
  *)
    echo "ENABLE_EXCHANGE_ACCOUNT not set to true; skipping enable-account."
    exit 0
    ;;
esac

echo "Using config: ${EXCHANGE_CONFIG}"
echo "Payto URI:   ${PAYTO_URI}"
echo "Output JSON: ${OUT}"
echo "Waiting for exchange at: ${EXCHANGE_KEYS_URL}"

wait_for_exchange() {
  local i
  for ((i=1; i<=EXCHANGE_WAIT_RETRIES; i++)); do
    if curl -fsS ${EXCHANGE_CURL_OPTS} "${EXCHANGE_KEYS_URL}" >/dev/null 2>&1; then
      echo "Exchange reachable (attempt ${i})."
      return 0
    fi
    sleep "${EXCHANGE_WAIT_INTERVAL}"
  done
  echo "Exchange not reachable after ${EXCHANGE_WAIT_RETRIES} attempts." >&2
  return 1
}

wait_for_exchange

taler-exchange-offline -c "${EXCHANGE_CONFIG}" enable-account "${PAYTO_URI}" > "${OUT}"
echo "enable-account JSON written to ${OUT}"

taler-exchange-offline -c "${EXCHANGE_CONFIG}" upload < "${OUT}"
echo "Upload complete."