#!/bin/bash

set -eu

file_env() {
  local var="$1"
  local fileVar="${var}_FILE"
  local def="${2:-}"

  if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
    echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
    exit 1
  fi

  local val="$def"
  if [ "${!var:-}" ]; then
    val="${!var}"
  elif [ "${!fileVar:-}" ]; then
    val="$(< "${!fileVar}")"
  fi

  export "$var"="$val"
  unset "$fileVar"
}

urlencode() {
  raw="$1"
  encoded=""
  length=$(echo -n "$raw" | wc -c)
  i=0

  while [ $i -lt $length ]; do
    c=$(echo "$raw" | cut -c $((i + 1)))
    case "$c" in
      [a-zA-Z0-9.~_-]) encoded="$encoded$c" ;;
      *) encoded="$encoded$(printf '%%%02X' "'$c")" ;;
    esac
    i=$((i + 1))
  done

  echo "$encoded"
}

file_env "TOKEN"
file_env "MONGODB_PASSWORD"
file_env "PAYLOAD_SECRET"

MONGODB_PASSWORD_ENCODED=$(urlencode "$MONGODB_PASSWORD")

export MONGODB_URI="mongodb://$MONGODB_USER:$MONGODB_PASSWORD_ENCODED@$MONGODB_HOST:$MONGODB_PORT"

"$@"