#!/bin/bash
# This file is in the public domain.

# main.sh is the main script that asks the questions and
# puts the answers into environment variables located at  "config/taler-internal.conf or config/taler.conf" files
# Nginx configuration - Reads values directly from these "config files".

set -eu

# include functions source file

source functions.sh

# include variables from configuration
mkdir -p config/
touch config/user.conf config/internal.conf
# Values supplied by user
source config/user.conf
# Values we generated
source config/internal.conf

# Ask questions to user
# START USER INTERACTION
say "Welcome to the GNU Taler Debian setup!"
say ""
say "All configuration values asked during the setup script"
say "can be changed in config/user.conf"

if test -z "${CURRENCY:-}"; then
  read -r -p "Enter the name of the currency (e.g. 'EUR'): " CURRENCY
  # convert to all-caps
  CURRENCY=$(echo "${CURRENCY}" | tr a-z A-Z)
  # libeufin currenly doesn't like currency names less than 3 letters.
  if [[ ${#CURRENCY} -lt 3 || ${#CURRENCY} -gt 11 ]]; then
    say "Currency name must be between 3 and 10 letters"
    exit 1
  fi
  echo "CURRENCY=${CURRENCY}" >>config/user.conf
fi
if test -z "${BANK_NAME:-}"; then
  read -r -p "Enter the human-readable name of the bank (e.g. 'Taler Bank'): " BANK_NAME
  echo "BANK_NAME=\"${BANK_NAME}\"" >>config/user.conf
fi
if test -z "${ENABLE_TLS:-}"; then
  read -r -p "Use TLS? (y/n): " ENABLE_TLS
  echo "ENABLE_TLS=${ENABLE_TLS}" >>config/user.conf
fi
if test -z "${DO_OFFLINE:-}"; then
  read -r -p "Run taler-exchange-offline? (y/n): " DO_OFFLINE
  echo "DO_OFFLINE=${DO_OFFLINE}" >>config/user.conf
fi
if test -z "${MASTER_PUBLIC_KEY:-}"; then
  if test "${DO_OFFLINE:-y}" == n; then
    read -r -p "Enter the exchange-offline master public key: " MASTER_PUBLIC_KEY
    echo "MASTER_PUBLIC_KEY=${MASTER_PUBLIC_KEY}" >>config/user.conf
  fi
fi
if test -z "${SANDBOX_ADMIN_PASSWORD:-}"; then
  read -r -s -p "Enter the admin password for the bank: " SANDBOX_ADMIN_PASSWORD
  echo "SANDBOX_ADMIN_PASSWORD=$(printf '%q' "${SANDBOX_ADMIN_PASSWORD}") >>config/user.conf
  echo "" # force new line
fi
if test -z "${DOMAIN_NAME:-}"; then
  read -r -p "Enter the domain name: " DOMAIN_NAME
  # convert to lower-case
  DOMAIN_NAME=$(echo "${DOMAIN_NAME}" | tr A-Z a-z)
  echo "DOMAIN_NAME=${DOMAIN_NAME}" >>config/user.conf
fi
# END USER INTERACTION

# Check DNS settings
if ! ping -c1 "exchange.${DOMAIN_NAME}" &>/dev/null; then
  say "Could not ping exchange.${DOMAIN_NAME}."
  say "Please make sure your DNS/network are working."
  exit 1
fi

# Check if the user is root, otherwise EXIT.
check_user

# Installation of deb packages required
. install_packages.sh

if test -z "${NEXUS_EXCHANGE_PASSWORD:-}"; then
  NEXUS_EXCHANGE_PASSWORD=$(uuidgen)
  echo "NEXUS_EXCHANGE_PASSWORD=\"${NEXUS_EXCHANGE_PASSWORD}\"" >>config/internal.conf
fi
if test -z "${SANDBOX_EXCHANGE_PASSWORD:-}"; then
  SANDBOX_EXCHANGE_PASSWORD=$(uuidgen)
  echo "SANDBOX_EXCHANGE_PASSWORD=\"${SANDBOX_EXCHANGE_PASSWORD}\"" >>config/internal.conf
fi

./config_launch_libeufin.sh
./config_nginx.sh
./setup-exchange.sh
./setup-merchant.sh

# Final message to the user
if test "${ENABLE_TLS:-}" == "y"; then
  PROTO="https"
else
  PROTO="http"
fi

say "Congratulations, you have successfully installed GNU Taler"
say "Your bank is at ${PROTO}://bank.${DOMAIN_NAME}/"
say "A merchant is at ${PROTO}://backend.${DOMAIN_NAME}/"
say "You should set credentials for the merchant soon."

exit 0
# END INSTALLATION