#!/usr/bin/env bash

function error_handler() {
  >&2 echo "Exited with BAD EXIT CODE '${2}' in ${0} script at line: ${1}."
  exit "$2"
}
trap 'error_handler ${LINENO} $?' ERR
set -o errtrace -o errexit -o nounset -o pipefail

# you can get a list of users from the keycloak realm file like:
#   grep '"email" :' keycloak/realm_exports/spiffworkflow-realm.json | awk -F : '{print $2}' | sed -E 's/ "//g' | sed -E 's/",//g' > s

# we keep some of these in keycloak/test_user_lists
# spiffworkflow-realm.json is a mashup of the status and sartography user lists.
user_file_with_one_email_per_line="${1:-}"

keycloak_realm="${2:-spiffworkflow}"
if [[ -z "${1:-}" ]]; then
  >&2 echo "usage: $(basename "$0") [user_file_with_one_email_per_line]"
  exit 1
fi

if [[ -z "${KEYCLOAK_BASE_URL:-}" ]]; then
  KEYCLOAK_BASE_URL=http://localhost:7002
fi
if [[ -z "${ADMIN_USERNAME:-}" ]]; then
  ADMIN_USERNAME="admin"
fi
if [[ -z "${ADMIN_PASSWORD:-}" ]]; then
  ADMIN_PASSWORD="admin"
fi

REALM_NAME="$keycloak_realm"
SECURE=false

KEYCLOAK_URL=$KEYCLOAK_BASE_URL/realms/$REALM_NAME/protocol/openid-connect/token

if [[ $SECURE = 'y' ]]; then
	INSECURE=
else
	INSECURE=--insecure
fi

# https://www.appsdeveloperblog.com/keycloak-rest-api-create-a-new-user/
result=$(curl --fail -s -X POST "$KEYCLOAK_URL" "$INSECURE" \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data-urlencode "username=${ADMIN_USERNAME}" \
  --data-urlencode "password=${ADMIN_PASSWORD}" \
  --data-urlencode 'grant_type=password' \
  --data-urlencode 'client_id=admin-cli'
)
backend_token=$(jq -r '.access_token' <<< "$result")

function add_user() {
  local user_email=$1
  local username=$2
  local user_attribute_one=$3

  local credentials='{"type":"password","value":"'"${username}"'","temporary":false}'

  local data='{"email":"'"${user_email}"'", "enabled":"true", "username":"'"${username}"'", "credentials":['"${credentials}"']'
  if [[ -n "$user_attribute_one" ]]; then
    data=''${data}', "attributes": {"'${custom_attribute_one}'": [ "'$user_attribute_one'" ]}'
  fi
  data="${data}}"

  local http_code
  http_code=$(curl --silent -o /dev/null -w '%{http_code}' --location --request POST "${KEYCLOAK_BASE_URL}/admin/realms/${keycloak_realm}/users" \
    -H 'Content-Type: application/json' \
    -H "Authorization: Bearer $backend_token" \
    --data-raw "$data")
  echo "$http_code"
}

first_line_processed="false"
custom_attribute_one=''

while read -r input_line; do
  if ! grep -qE '^#' <<<"$input_line" ; then
    if [[ "$first_line_processed" == "false" ]]; then
      email_header=$(awk -F ',' '{print $1}' <<<"$input_line")
      if [[ "$email_header" != "email" ]]; then
        >&2 echo "ERROR: the first column in the first row must be email."
        exit 1
      fi
      custom_attribute_one=$(awk -F ',' '{print $2}' <<<"$input_line")
      first_line_processed="true"
    elif [[ -n "$input_line" ]]; then
      user_email=$(awk -F ',' '{print $1}' <<<"$input_line")
      username=$(awk -F '@' '{print $1}' <<<"$user_email")
      user_attribute_one=$(awk -F ',' '{print $2}' <<<"$input_line")
      http_code=$(add_user "$user_email" "$username" "$user_attribute_one")

      if [[ "$http_code" == "409" ]]; then
        user_info=$(curl --fail --silent --location --request GET "${KEYCLOAK_BASE_URL}/admin/realms/${keycloak_realm}/users?username=${username}&exact=true" \
          -H 'Content-Type: application/json' \
          -H "Authorization: Bearer $backend_token")

        user_id=$(jq -r '.[0] | .id' <<<"$user_info")
        if [[ -z "$user_id" ]]; then
          >&2 echo "ERROR: Could not find user_id for user: ${user_email}"
          exit 1
        fi
        curl --fail --location --silent --request DELETE "${KEYCLOAK_BASE_URL}/admin/realms/${keycloak_realm}/users/${user_id}" \
          -H 'Content-Type: application/json' \
          -H "Authorization: Bearer $backend_token"

        http_code=$(add_user "$user_email" "$username" "$user_attribute_one")
      fi
      if [[ "$http_code" != "201" ]]; then
        >&2 echo "ERROR: Failed to create user: ${user_email} with http_code: ${http_code}"
        exit 1
      fi
    fi
  fi
done <"$user_file_with_one_email_per_line"