#!/usr/bin/env bash

set -u

error() {
  echo >&2 "error: $*"
  exit 1
}

# Make sure only root can run our script
(($( id -u) == 0))  || error "this script must be run as root!"

command -v sudo > /dev/null || error "sudo command not found!"
command -v openssl > /dev/null || error "openssl command not found!"
command -v psql > /dev/null || error "psql command not found!"

typeset -r DB_USER="airtime"
typeset -r DB_PASSWORD=$(openssl rand -hex 16)

echo "Changing password for database user '$DB_USER' to '$DB_PASSWORD'"
sudo -u postgres psql -c "ALTER USER $DB_USER WITH PASSWORD '$DB_PASSWORD';"