#!/bin/bash
set -e

: "${OS_USERNAME:?Error: must set OS_USERNAME environment variable}"
: "${OS_PASSWORD:?Error: must set OS_PASSWORD environment variable}"
: "${OS_USER_DOMAIN_NAME:?Error: must set OS_USER_DOMAIN_NAME environment variable}"
: "${OS_PROJECT_DOMAIN_NAME:?Error: must set OS_PROJECT_DOMAIN_NAME environment variable}"
: "${OS_AUTH_URL:?Error: must set OS_AUTH_URL environment variable}"
: "${OS_PROJECT_NAME:?Error: must set OS_PROJECT_NAME environment variable}"

generate_post_data()
{
cat <<EOF
{
  "auth": {
      "identity": {
          "methods": [
              "password"
          ],
          "password": {
              "user": {
                  "domain": {
                      "name": "$OS_USER_DOMAIN_NAME"
                  },
                  "name": "$OS_USERNAME",
                  "password": "$OS_PASSWORD"
              }
          }
      },
      "scope": {
          "project": {
              "name": "$OS_PROJECT_NAME",
              "domain": {
                  "name": "$OS_PROJECT_DOMAIN_NAME"
              }
          }
      }
  }
}
EOF
}

response=$(curl -is \
    -H "Accept: application/json" \
    -H "Content-Type:application/json" \
    -X POST --data "$(generate_post_data)" "$OS_AUTH_URL/auth/tokens")

token=$(echo "$response" | awk '/X-Subject-Token/ {print $2}')

[ -z "$token" ] && echo -e "Error fetching token:\n$response" && exit 1;

echo "$token";