#!/bin/bash
# shellcheck disable=SC2154 # Variable referenced but not assigned (seq_origin)

readonly toolName=ejabberd
readonly toolDeps=(ejabberd erlang-p1-mysql)
readonly toolConfLoc="/etc/ejabberd/ejabberd.yml"
readonly toolAdminConf="/etc/ejabberd/ejabberdctl.cfg"
# for http upload
readonly toolStorageLoc="/var/ejabberd"
readonly certRoot="/etc/letsencrypt"

# needed for different steps
myDomain=
myUser=
myPass=

seq_trapExit() { unset myPass; }

step_1_info() { echo "Install $toolName via apt"; }
step_1_alias() { echo "install"; }
step_1() {
  exe apt update
  exe apt install -y "${toolDeps[@]}"
  exe systemctl stop $toolName
}

step_2_info() { echo "Use certificate from local letsencrypt"; }
step_2() {
  readDomain

  local certLoc="${certRoot}/live/${myDomain}/full.pem"
  if [ ! -f "$certLoc" ] ; then
    echo "[ERROR] $certLoc not found"
    return 1;
  fi

  local toolCertLoc="/etc/ejabberd/ejabberd.pem"
  if [ -f "${toolCertLoc}.bck" ] ; then
    echo "[ERROR] Cannot backup original $toolName certificate"
    return 1;
  fi

  exe mv "$toolCertLoc" "${toolCertLoc}.bck"
  exe ln -s "$certLoc" "$toolCertLoc"
  # read access for ejabberd to read certificate
  exe chown root:ejabberd "$certRoot"
  exe chmod 750 "$certRoot"
}

step_3_info() { echo "Create basic configuration"; }
step_3() {
  if [ ! -f "${seq_origin}/ejabberd.yml" ] ; then
    addConf -m "$MissingConfEntry" "$toolConfLoc"
  else
    readDomain
    echo -e "\nThis user will be the admin:"
    readUser
    addConf -cf "${seq_origin}/ejabberd.yml" "$toolConfLoc"
    # modify configuration
    exe sed -i "s/mydomain\.eu/${myDomain}/" "$toolConfLoc"
    exe sed -i "s/myuser/${myUser}/" "$toolConfLoc"
    # create storage for http upload
    exe mkdir -p "$toolStorageLoc"
    exe chown root:$toolName "$toolStorageLoc"
    exe chmod 770 "$toolStorageLoc"
  fi
  # Erlang-VM to listen only on local interface
  exe sed -i "s/#\(INET_DIST_INTERFACE=127\.0\.0\.1\)/\1/" "$toolAdminConf"
}

MissingConfEntry="Seq's basic configuration file \"${seq_origin}/ejabberd.yml\" missing.
Backup $toolConfLoc and create a configuration manually.

Some essential settings needed:
- Domain
- Admin User"

step_4_info() { echo "Restart $toolName"; }
step_4_alias() { echo "restart"; }
step_4() {
  exe service ejabberd restart
}

step_5_info() { echo "Create new user"; }
step_5_alias() { echo "adduser"; }
step_5() {
  readDomain
  readUser
  readUserPass
  exe ejabberdctl register "${myUser}" "${myDomain}" "${myPass}"
}

step_10_info() { echo "List existing user"; }
step_10_alias() { echo "listuser"; }
step_10() {
  readDomain
  exe ejabberdctl registered_users "${myDomain}"
}

step_12_info() { echo "Change password for existing user"; }
step_12_alias() { echo "passwd"; }
step_12() {
  readDomain
  readUser
  readUserPass
  exe ejabberdctl change_password "${myUser}" "${myDomain}" "${myPass}"
}

step_14_info() { echo "Remove registered user"; }
step_14_alias() { echo "deluser"; }
step_14() {
  readDomain
  readUser
  readUserPass
  exe ejabberdctl unregister "${myUser}" "${myDomain}" "${myPass}"
}

readDomain() {
  if [ "$myDomain" == "" ] ; then
    myDomain=$(ask "Enter your domain: ")
    endIfEmpty myDomain "$toolName domain"
  fi
}

readUser() {
  sqr::echo -e "\nDon't use spaces in user name!"
  if [ "$myUser" == "" ] ; then
    myUser=$(ask "Enter user name: ")
    sqr::echo
    endIfEmpty myUser "$toolName user name"
  fi
}

readUserPass() {
  local myPass2=
  sqr::echo -e "\nDon't use spaces in user password!"
  if [ -z "$myPass" ] ; then
    myPass=$(ask -s "Enter user password: "); echo
    sqr::echo
    myPass2=$(ask -s "Enter user password again: "); echo
    sqr::echo
    if [ "$myPass" != "$myPass2" ] ; then
      error "Passwords don't match"
      return 1;
    fi
    unset myPass2
    endIfEmpty myPass "$toolName user password"
  fi
}

# shellcheck disable=SC2034 # Appears unused
readonly sqr_minVersion=16
# shellcheck disable=SC1091 # Don't follow this source
. /usr/local/bin/sequencer.sh