#!/usr/bin/env bash

set -e

if [ -z "$CF_BIN" ]; then CF_BIN=$(which cf); fi


function construct_params_from_environment() {
  local serviceName="$1"
  local serviceNameVar=$(echo "$serviceName" | tr a-z A-Z)
  local jdbc_url=$(eval echo \$${serviceNameVar}_JDBC_URL)
  if [ -z "$jdbc_url" ]; then
      echo "${serviceNameVar}_JDBC_URL must be set to the $serviceName jdbc.url" >&2
      return 1
  fi
  local username=$(eval echo \$${serviceNameVar}_USERNAME)
  if [ -z "$username" ]; then
      echo "${serviceNameVar}_USERNAME must be set to the $serviceName username" >&2
      return 1
  fi
  local password=$(eval echo \$${serviceNameVar}_PASSWORD)
  if [ -z "$password" ]; then
      echo "${serviceNameVar}_PASSWORD must be set to the $serviceName password" >&2
      return 1
  fi
  params="{\"jdbc.url\":\"$jdbc_url\",\"username\":\"$username\",\"password\":\"$password\"}"
  echo "$params"
}

function log_into_cf() {
  if [ -z "$CF_API" ]; then
      echo "CF_API must be set to a Cloud Foundry API endpoint" >&2
      exit 1
  fi
  if [ -z "$CF_USERNAME" ]; then
      echo "CF_USERNAME must be set to a Cloud Foundry username" >&2
      exit 1
  fi
  if [ -z "$CF_PASSWORD" ]; then
      echo "CF_PASSWORD must be set to a Cloud Foundry password" >&2
      exit 1
  fi
  if [ -z "$CF_ORG" ]; then
      echo "CF_ORG must be set to a Cloud Foundry organization" >&2
      exit 1
  fi
  if [ -z "$CF_SPACE" ]; then
      echo "CF_SPACE must be set to a Cloud Foundry space" >&2
      exit 1
  fi

  #    cf login [-a API_URL] [-u USERNAME] [-p PASSWORD] [-o ORG] [-s SPACE] [--sso | --sso-passcode PASSCODE]
  "$CF_BIN" login -a "$CF_API" -u "$CF_USERNAME" -p "$CF_PASSWORD" \
    -o "$CF_ORG" -s "$CF_SPACE"
}

function create_service() {
	local serviceName="$1"
  local parameters=$(construct_params_from_environment "$serviceName")

  if "$CF_BIN" services | grep "$serviceName"; then
      echo "$serviceName already exists, doing nothing"
      return 0
  fi

  echo "Configuring $serviceName secrets in $CF_ORG/$CF_SPACE."
  if "$CF_BIN" create-user-provided-service "$serviceName" -p "$parameters"; then
      echo "Created $serviceName successfully"
  else
      echo "Failed to create $serviceName" >&2
      return 1
  fi
	"$CF_BIN" cups "$serviceName" -p "$serviceSecrets"
}

# If we're executing this script, log in and create services
if [ "$0" == "$BASH_SOURCE" ]; then
  log_into_cf
  create_service "$@"
fi