#!/bin/bash
set -eo pipefail; [[ $TRACE ]] && set -x

. /usr/share/debconf/confmodule

readonly DOKKU_ROOT="${DOKKU_ROOT:-/home/dokku}"
readonly DOKKU_LIB_ROOT="${DOKKU_LIB_PATH:-/var/lib/dokku}"

case "$1" in
  abort-upgrade|abort-remove|abort-deconfigure)
    ;;

  configure)
    mandb
    [ ! -x /usr/bin/docker.io ] || ln -sf /usr/bin/docker.io /usr/local/bin/docker
    modprobe aufs || echo "WARNING: Restart server to finish installing dokku!"
    sshcommand create dokku /usr/local/bin/dokku
    egrep -i "^docker" /etc/group || groupadd docker
    usermod -aG docker dokku

    echo "Setting up plugin directories"
    # should be replaced by `plugn init`
    mkdir -p ${DOKKU_LIB_ROOT}/core-plugins/available ${DOKKU_LIB_ROOT}/plugins/available
    mkdir -p ${DOKKU_LIB_ROOT}/core-plugins/enabled ${DOKKU_LIB_ROOT}/plugins/enabled
    touch ${DOKKU_LIB_ROOT}/core-plugins/config.toml ${DOKKU_LIB_ROOT}/plugins/config.toml

    echo "Migrating old plugins"
    find ${DOKKU_LIB_ROOT}/plugins/ -mindepth 1 -maxdepth 1 -type d -printf '%f\n' | while read -r plugin; do
      if [ "$plugin" = "available" ] || [ "$plugin" = "enabled" ]; then
        continue
      elif [ -f ${DOKKU_LIB_ROOT}/plugins/$plugin/.core ]; then
        rm -rf ${DOKKU_LIB_ROOT}/plugins/$plugin
      elif [ ! -d ${DOKKU_LIB_ROOT}/plugins/available/$plugin ]; then
        mv ${DOKKU_LIB_ROOT}/plugins/$plugin ${DOKKU_LIB_ROOT}/plugins/available;
      fi
    done

    echo "Enabling all core plugins"
    find ${DOKKU_LIB_ROOT}/core-plugins/available -mindepth 1 -maxdepth 1 -type d -printf '%f\n' | while read -r plugin; do
      if [ ! -d ${DOKKU_LIB_ROOT}/plugins/available/$plugin ]; then
        ln -s ${DOKKU_LIB_ROOT}/core-plugins/available/$plugin ${DOKKU_LIB_ROOT}/plugins/available/$plugin;
        PLUGIN_PATH=${DOKKU_LIB_ROOT}/core-plugins plugn enable $plugin
        PLUGIN_PATH=${DOKKU_LIB_ROOT}/plugins plugn enable $plugin
      fi
    done
    find -L ${DOKKU_LIB_ROOT} -type l -delete
    chown dokku:dokku -R ${DOKKU_LIB_ROOT}/plugins ${DOKKU_LIB_ROOT}/core-plugins

    echo "Install all core plugins"
    dokku plugin:install --core

    rm -f ${DOKKU_ROOT}/VERSION
    cp ${DOKKU_LIB_ROOT}/STABLE_VERSION ${DOKKU_ROOT}/VERSION

    if [[ -f /etc/nginx/conf.d/dokku-installer.conf ]]; then
      echo "Setting up dokku-installer"
      /usr/share/dokku/contrib/dokku-installer.py onboot

      if command -v systemctl &>/dev/null; then
        echo "Enabling dokku-installer"
        systemctl enable dokku-installer
      fi

      installer_status="$(service dokku-installer status 2> /dev/null || true)"
      if echo $installer_status | grep -Eq "(inactive|waiting)" > /dev/null; then
        echo "Starting dokku-installer"
        service dokku-installer start || echo "Unable to start dokku-installer"
      fi
    fi

    db_get "dokku/web_config"
    if [ "$RET" = "true" ]; then
      db_stop
      exit 0
    fi

    db_get "dokku/vhost_enable"
    if [ "$RET" = "true" ]; then
        db_get "dokku/hostname"
        echo "$RET" > "${DOKKU_ROOT}/VHOST"
    else
        rm -f "${DOKKU_ROOT}/VHOST"
    fi

    db_get "dokku/hostname"
    echo "$RET" > "${DOKKU_ROOT}/HOSTNAME"

    if [ -z "${DEBCONF_RECONFIGURE}" ]; then
      db_get "dokku/key_file"
      if [ -f "$RET" ]; then
        sshcommand acl-add dokku default < "$RET"
      fi
    fi
    ;;

  *)
    echo "postinst called with unknown argument \`$1'" >&2
    exit 1
    ;;
esac

db_stop
exit 0