#!/bin/bash

set -euE -o pipefail

# shellcheck source=../scripts/helpers/index.sh
source /usr/local/bin/helpers/index.sh

function _usage
{
  # shellcheck disable=SC2059
  printf '%s' "${PURPLE}SETUP${RED}(${YELLOW}1${RED})

${ORANGE}NAME${RESET}
    setup - 'docker-mailserver' Administration & Configuration CLI

${ORANGE}SYNOPSIS${RESET}
    setup [ OPTIONS${RED}...${RESET} ] COMMAND [ help ${RED}|${RESET} ARGUMENTS${RED}...${RESET} ]

    COMMAND ${RED}:=${RESET} { email ${RED}|${RESET} alias ${RED}|${RESET} quota ${RED}|${RESET} dovecot-master ${RED}|${RESET} config ${RED}|${RESET} relay ${RED}|${RESET} debug } SUBCOMMAND

${ORANGE}DESCRIPTION${RESET}
    This is the main administration command that you use for all your interactions with
    'docker-mailserver'. Initial setup, configuration, and much more is done with this CLI tool.

    Most subcommands can provide additional information and examples by appending 'help'.
    For example: 'setup email add help'

${RED}[${ORANGE}SUB${RED}]${ORANGE}COMMANDS${RESET}
    ${LBLUE}COMMAND${RESET} email ${RED}:=${RESET}
        setup email ${CYAN}add${RESET} <EMAIL ADDRESS> [<PASSWORD>]
        setup email ${CYAN}update${RESET} <EMAIL ADDRESS> [<PASSWORD>]
        setup email ${CYAN}del${RESET} [ OPTIONS${RED}...${RESET} ] <EMAIL ADDRESS> [ <EMAIL ADDRESS>${RED}...${RESET} ]
        setup email ${CYAN}restrict${RESET} <add${RED}|${RESET}del${RED}|${RESET}list> <send${RED}|${RESET}receive> [<EMAIL ADDRESS>]
        setup email ${CYAN}list${RESET}

    ${LBLUE}COMMAND${RESET} alias ${RED}:=${RESET}
        setup alias ${CYAN}add${RESET} <EMAIL ADDRESS> <RECIPIENT>
        setup alias ${CYAN}del${RESET} <EMAIL ADDRESS> <RECIPIENT>
        setup alias ${CYAN}list${RESET}

    ${LBLUE}COMMAND${RESET} quota ${RED}:=${RESET}
        setup quota ${CYAN}set${RESET} <EMAIL ADDRESS> [<QUOTA>]
        setup quota ${CYAN}del${RESET} <EMAIL ADDRESS>

    ${LBLUE}COMMAND${RESET} dovecot-master ${RED}:=${RESET}
        setup dovecot-master ${CYAN}add${RESET} <USERNAME> [<PASSWORD>]
        setup dovecot-master ${CYAN}update${RESET} <USERNAME> [<PASSWORD>]
        setup dovecot-master ${CYAN}del${RESET} [ OPTIONS${RED}...${RESET} ] <USERNAME> [ <USERNAME>${RED}...${RESET} ]
        setup dovecot-master ${CYAN}list${RESET}

    ${LBLUE}COMMAND${RESET} config ${RED}:=${RESET}
        setup config ${CYAN}dkim${RESET} [ ARGUMENTS${RED}...${RESET} ]

    ${LBLUE}COMMAND${RESET} relay ${RED}:=${RESET}
        setup relay ${CYAN}add-auth${RESET} <DOMAIN> <USERNAME> [<PASSWORD>]
        setup relay ${CYAN}add-domain${RESET} <DOMAIN> <HOST> [<PORT>]
        setup relay ${CYAN}exclude-domain${RESET} <DOMAIN>

    ${LBLUE}COMMAND${RESET} fail2ban ${RED}:=${RESET}
        setup fail2ban ${RESET}
        setup fail2ban ${CYAN}ban${RESET} <IP>
        setup fail2ban ${CYAN}unban${RESET} <IP>
        setup fail2ban ${CYAN}log${RESET}

    ${LBLUE}COMMAND${RESET} debug ${RED}:=${RESET}
        setup debug ${CYAN}fetchmail${RESET}
        setup debug ${CYAN}login${RESET} <COMMANDS>
        setup debug ${CYAN}show-mail-logs${RESET}

${ORANGE}EXAMPLES${RESET}
    ${LWHITE}setup email add test@example.com${RESET}
        Add the email account ${LWHITE}test@example.com${RESET}. You will be prompted
        to input a password afterwards since no password was supplied.

    ${LWHITE}setup config dkim keysize 2048 domain 'example.com,not-example.com'${RESET}
        Creates keys of length 2048 for the domains in comma-seperated list.
        This is necessary when using LDAP as the required domains cannot be inferred.

    ${LWHITE}setup config dkim help${RESET}
        This will provide you with a detailed explanation on how to use the ${LWHITE}
        config dkim${RESET} command, showing what arguments can be passed and what they do.

"
}
function _invalid_command
{
  echo "The command '${*}' is invalid.
Use \`setup help\` to get an overview of all commands." >&2
  exit 2
}

function _main
{
  case ${1:-} in

    ( email )
      case ${2:-} in
        ( add      ) shift 2 ; addmailuser "${@}" ;;
        ( update   ) shift 2 ; updatemailuser "${@}" ;;
        ( del      ) shift 2 ; delmailuser "${@}" ;;
        ( restrict ) shift 2 ; restrict-access "${@}" ;;
        ( list     ) listmailuser ;;
        ( *        ) _invalid_command "${@}" ;;
      esac
      ;;

    ( alias )
      case ${2:-} in
        ( add      ) shift 2 ; addalias "${@}" ;;
        ( del      ) shift 2 ; delalias "${@}" ;;
        ( list     ) shift 2 ; listalias ;;
        ( *        ) _invalid_command "${@}" ;;
      esac
      ;;

    ( quota )
      case ${2:-} in
        ( set      ) shift 2 ; setquota "${@}" ;;
        ( del      ) shift 2 ; delquota "${@}" ;;
        ( *        ) _invalid_command "${@}" ;;
      esac
      ;;

    ( dovecot-master )
      case ${2:-} in
        ( add      ) shift 2 ; adddovecotmasteruser "${@}" ;;
        ( update   ) shift 2 ; updatedovecotmasteruser "${@}" ;;
        ( del      ) shift 2 ; deldovecotmasteruser "${@}" ;;
        ( list     ) listdovecotmasteruser ;;
        ( *        ) _invalid_command "${@}" ;;
      esac
      ;;

    ( config )
      case ${2:-} in
        ( dkim     ) shift 2 ; open-dkim "${@}" ;;
        ( *        ) _invalid_command "${@}" ;;
      esac
      ;;

    ( relay )
      case ${2:-} in
        ( add-domain     ) shift 2 ; addrelayhost "${@}" ;;
        ( add-auth       ) shift 2 ; addsaslpassword "${@}" ;;
        ( exclude-domain ) shift 2 ; excluderelaydomain "${@}" ;;
        ( *              ) _invalid_command "${@}" ;;
      esac
      ;;

    ( fail2ban ) shift 1 ; fail2ban "${@}" ;;

    ( debug )
      case ${2:-} in
        ( fetchmail      ) debug-fetchmail ;;
        ( show-mail-logs ) cat /var/log/mail/mail.log ;;
        ( login          )
          shift 2
          if [[ -z ${1:-} ]]
          then
            /bin/bash
          else
            /bin/bash -c "${@}"
          fi
          ;;
        ( * ) _invalid_command "${*}" ;;
      esac
      ;;

    ( help ) _usage ;;
    ( *    ) _invalid_command "${*}" ;;
  esac
}

if [[ -z ${1:-} ]]
then
  _usage
else
  _main "${@}"
fi