#!/bin/bash
set -eo pipefail

log-info() {
  declare desc="Log info formatter"
  echo "       $*" 1>&2
}

log-fail() {
  declare desc="Log fail formatter"
  echo " !     $*" 1>&2
  exit 1
}

log-warn() {
  declare desc="Log fail formatter"
  echo " !     $*" 1>&2
}

support-userns() {
  chown 0:0 /usr/bin/sudo
  chmod 4755 /usr/bin/sudo
  chown 0:0 /usr/lib/sudo/sudoers.so
  chown -R 0:0 /etc/sudoers
  chown -R 0:0 /etc/sudoers.d
  chown -R 0:0 /run/sshd
}

main() {
  local NGINX_ROOT

  support-userns

  if [[ ! -d /mnt/dokku ]]; then
    log-info "Creating missing /mnt/dokku"
    mkdir -p /mnt/dokku
  fi

  directories=("/etc/ssh" "/home/dokku" "/var/lib/dokku/config" "/var/lib/dokku/data" "/var/lib/dokku/services")
  for dir in "${directories[@]}"; do
    if [[ ! -e "$dir" ]]; then
      log-info "Copying ${dir} skel into place"
      mkdir -p "/mnt/dokku${dir}"
      if [[ -d "/skel${dir}" ]]; then
        rsync -a "/skel${dir}/" "${dir}/" || log-fail "Unable to copy ${dir} skel into place"
      fi
    fi

    # chown mount directories to "dokku:dokku"
    if [[ "$dir" == "/var/lib/dokku/services" ]]; then
      chown dokku:dokku /var/lib/dokku/services
    elif [[ "$dir" != "/etc/ssh" ]]; then
      find "$dir" -print0 | xargs -0 chown -h dokku:dokku
    fi
  done

  if [[ -f /mnt/dokku/plugin-list ]]; then
    while read line; do
      local plugin_name="$(echo "$line" | awk -F: '{print $1}')"
      if dokku plugin:installed "$plugin_name"; then
        log-warn "Skipping already installed plugin: $plugin_name"
      else
        dokku plugin:install "$(echo "$line" | awk -F': ' '{print $2}')" --name "$plugin_name"
      fi
    done </mnt/dokku/plugin-list
  fi

  if [[ -n "$DOKKU_HOSTNAME" ]]; then
    echo "dokku dokku/hostname string $DOKKU_HOSTNAME" | debconf-set-selections
    echo "dokku dokku/vhost_enable boolean true" | debconf-set-selections
    dokku --quiet domains:set-global "$DOKKU_HOSTNAME"
  fi

  if [[ -x /usr/local/bin/docker ]]; then
    mkdir -p /home/dokku/.dokkurc
    echo "export DOCKER_BIN=/usr/local/bin/docker" >"/home/dokku/.dokkurc/DOCKER_BIN"
  fi

  if [[ -n "$DOKKU_HOST_ROOT" ]]; then
    touch /etc/default/dokku
    echo "export DOKKU_HOST_ROOT=$DOKKU_HOST_ROOT" >>/etc/default/dokku
    chown dokku:dokku /etc/default/dokku
  fi

  NGINX_ROOT="/etc/nginx"
  if [[ -x /usr/bin/openresty ]]; then
    NGINX_ROOT="/usr/local/openresty/nginx/conf"
    rm -rf /etc/runit/runsvdir/default/nginx
  else
    rm -rf /etc/runit/runsvdir/default/openresty
  fi

  if [[ ! -f "/mnt/dokku${NGINX_ROOT}/dhparam.pem" ]]; then
    mkdir -p "/mnt/dokku${NGINX_ROOT}"
    openssl dhparam -out "/mnt/dokku${NGINX_ROOT}/dhparam.pem" 2048
  fi

  mkdir -p "${NGINX_ROOT}/conf.d"
  cp -f "/mnt/dokku${NGINX_ROOT}/dhparam.pem" "${NGINX_ROOT}/dhparam.pem"
  chown root:root "${NGINX_ROOT}/dhparam.pem"
  chown root:root "${NGINX_ROOT}/conf.d"
}

main "$@"
