#!/bin/bash

readonly toolName="fhem"
readonly toolUser="$toolName"
readonly toolHome="/opt/fhem"
readonly toolVersion="6.1"
readonly toolDpkg="fhem-${toolVersion}.deb"
readonly toolUrl="http://fhem.de/${toolDpkg}"
# default deps listed at https://debian.fhem.de/
readonly toolDeps="perl-base libdevice-serialport-perl libwww-perl libio-socket-ssl-perl libcgi-pm-perl libjson-perl sqlite3 libdbd-sqlite3-perl libtext-diff-perl libtimedate-perl libmail-imapclient-perl libgd-graph-perl libtext-csv-perl libxml-simple-perl liblist-moreutils-perl fonts-liberation2 libimage-librsvg-perl libgd-text-perl libsocket6-perl libio-socket-inet6-perl libmime-base64-urlsafe-perl libimage-info-perl libusb-1.0-0-dev libnet-server-perl"
toolDeps2="libdate-manip-perl libhtml-treebuilder-xpath-perl libmojolicious-perl libxml-bare-perl libauthen-oath-perl libconvert-base32-perl libmodule-pluggable-perl libnet-bonjour-perl libcrypt-urandom-perl"
# for rounding operations e.g.:
# { use Math::Round qw/nearest/;; nearest('0.01',ReadingsVal("1WT_28_5728E9070000", "temperature", 0)-1.1);; }
toolDeps2+=" libmath-round-perl"
# for fritzbox connection
toolDeps2+=" libsoap-lite-perl libjson-xs-perl"
# for xmpp support (no special solution needed for raspbian buster)
toolDepsJabber=" libnet-xmpp-perl libxml-stream-perl libnet-jabber-perl"
aptOpt=

#step_config() {
#  echo "Called once before executing steps."
#  echo "e.g. to source a config file:"
#  #. "$CONFIG_FILE"
#}

step_1_info() { echo "Install prerequisits for $toolName"; }
step_1_alias() { echo "install"; }
step_1() {
  local aptOpt=
  if quiet ; then
    aptOpt="-y"
  fi
  #exe apt update
  exe apt install $toolDeps $toolDeps2 "$aptOpt"
  #exe apt install "$toolDeps2" "$aptOpt"
  endReturn -o $? "Installation of prerequisits failed"
}

step_2_info() { echo "Install jabber prerequisits"; echoinfo "(May be skipped)"; }
step_2() {
  exe apt install $toolDepsJabber "$aptOpt"
  endReturn -o $? "Installation of prerequisits for jabber failed"
}

step_3_info() { echo "Download and install $toolName version $toolVersion"; }
step_3() {
  exe wget "$toolUrl" -O "$downPath"
  endReturn -o $? "Download of $toolName failed"
  exe dpkg -i "$downPath"
  endReturn -o $? "Installation of $toolName failed"
  info "$toolName is now running on http://$(hostname -I | cut -d " " -f 1):8083"
}
downPath="/tmp/$toolDpkg"

step_20_info() { echo "List $toolName prerequisits"; }
step_20_alias() { echo "listdeps"; }
step_20() {
  echo " [I] $toolName prerequisits:"
  echo "$toolDeps $toolDeps2"
}

step_30_info() { echo "Create user $toolUser"; }
step_30() {
  exe useradd --system --home "$toolHome" --gid dialout --shell /bin/false "$toolUser"
  endReturn -o $? "Creating user $toolUser failed"
}

step_32_info() { echo "Create $toolName systemd service"; }
step_32() {
  exe cp "${toolHome}/contrib/init-scripts/fhem.service" "$systemdConfigLoc"
  exe systemctl daemon-reload
}
systemdConfigLoc="/etc/systemd/system"

step_34_info() { echo "Downgrade $toolName jabber dependencies (callbackIQ -> FHEM crash)"; }
step_34_alias() { echo "downgrade_xmpp"; }
step_34() {
  if [ ! -f $libnetDown ]; then
    exe wget "$libnetUrl" -O "$libnetDown"
    endReturn -o $? "Download of $libnetUrl failed"
  fi
  if [ ! -f $libxmlDown ]; then
    exe wget "$libxmlUrl" -O "$libxmlDown"
    endReturn -o $? "Download of $libxmlUrl failed"
  fi

  local aptOption=
  if quiet ; then
    aptOption="-y"
  else
    aptOption=""
  fi

  exe apt remove libnet-jabber-perl $aptOption
  saveReturn $?
  exe apt remove libnet-xmpp-perl $aptOption
  saveReturn $?
  exe apt remove libxml-stream-perl $aptOption
  saveReturn $?
  endReturn "Failed removing packages; Manual fix required"

  exe dpkg -i "$libxmlDown"
  saveReturn $?
  exe dpkg -i "$libnetDown"
  saveReturn $?
  exe apt install libnet-jabber-perl $aptOption 
  saveReturn $?
  endReturn "Failed removing packages; Manual fix required"

  exe rm "$libxmlDown" "$libnetDown"
}
libnetName="libnet-xmpp-perl_1.02-3_all.deb"
libnetDown="/tmp/$libnetName"
libnetUrl="http://ftp.de.debian.org/debian-archive/debian/pool/main/libn/libnet-xmpp-perl/$libnetName"
libxmlName="libxml-stream-perl_1.23-2_all.deb"
libxmlDown="/tmp/$libxmlName"
libxmlUrl="http://ftp.de.debian.org/debian/pool/main/libx/libxml-stream-perl/$libxmlName"

step_35_info() { echo "Pin downgraded $toolName jabber dependencies"; }
step_35() {
  addConf -s "$aptPinXmpp" "$aptPinFile"
}
aptPinFile="/etc/apt/preferences.d/00_FhemJabber"
aptPinXmpp="Package: libnet-xmpp-perl
Pin: version 1.02-3*
Pin-Priority: 1000 

Package: libxml-stream-perl
Pin: version 1.23-2
Pin-Priority: 1000"

step_37_info() { echo "Download latest speedtest python script"; }
step_37_alias() { echo "speedtestdownload"; }
step_37() {
  local lSpeedPath="/usr/local/bin/speedtest-cli"
  exe wget -O "$lSpeedPath" https://raw.githubusercontent.com/sivel/speedtest-cli/master/speedtest.py
  exe chmod +x "$lSpeedPath"
}

step_40_info() { echo "Execute fhem [COMMAND]"; }
step_40_alias() { echo "exe"; }
step_40() {
  shift
  exe perl "${toolHome}/fhem.pl" 7072 "${1:-}"
}

readonly sqr_minVersion=16
. /usr/local/bin/sequencer.sh