#!/bin/bash

set -e

host=$(relation-get host)
port=$(relation-get port)
connection_security=$(relation-get connection-security)
auth_method=$(relation-get auth-method)

## We are creating a URL that looks like this:
##   smtp://[login:password@]host:port/?ignoreTLS=true&secure=false
## ref: https://nodemailer.com/smtp/

opts=()
declare -A ENV
case "$connection_security" in
    "none")
        url+="smtp://"
        opts+=(
            "ignoreTLS=true"
            "secure=false"
        )
        ;;
    "ssl/tls")
        url+="smtps://"
        ;;
    *)
        error "Unsupported connection security: $connection_security"
        exit 1
        ;;
esac
case "$auth_method" in
    "none")
        :
        ;;
    "password")
        login=$(relation-get login) || true
        password=$(relation-get password) || true
        url+="$login:${password//\$/\$\$}@"
        ;;
    *)
        error "Unsupported auth method: $auth_method"
        exit 1
        ;;
esac

url+="$host:$port/"

first=1
for opt in "${opts[@]}"; do
    if [ $first -eq 1 ]; then
        url+="?"
        first=0
    else
        url+="&"
    fi
    url+="$opt"
done

config-add "\
services:
  $MASTER_BASE_SERVICE_NAME:
    environment:
      PDS_EMAIL_SMTP_URL: \"$url\"
"