#!/bin/bash

interactive=$(if test -t 0; then echo true; else echo false; fi)
set -eux -o pipefail ${EXTRA_SHELL_OPTS-}
IFS=$'\n\t'

export JAVA_HOME=$(find /usr/lib/jvm -mindepth 1 -maxdepth 1 -type d)

# Configure Java unlimited strength cryptography
if [ "${CRYPTO_POLICY}" = "unlimited" ]; then
  echo "Configuring Java unlimited strength cryptography policy..."
  sed -i 's/^crypto.policy=limited/crypto.policy=unlimited/' "${JAVA_HOME}/conf/security/java.security"
fi

# Set capabilities when available for add-ons using Pcap4J
if capsh --print | grep -E 'Current:.+,cap_net_admin,cap_net_raw,.+' >/dev/null; then
  setcap cap_net_raw,cap_net_admin=eip "${JAVA_HOME}/bin/java"
  cat >> "/etc/ld-musl-$(arch).path" <<-EOI
/lib
/usr/lib
${JAVA_HOME}/lib
${JAVA_HOME}/lib/jli
${JAVA_HOME}/lib/security
${JAVA_HOME}/lib/server
EOI
fi

# Delete stale nrjavaserial lock files and Karaf instance.properties to avoid PID conflicts on restarts
rm -f /var/lock/LCK..*
rm -f "${OPENHAB_USERDATA}/tmp/instances/instance.properties"

# Add openhab user and add user to groups for different host distros
# Alpine:             audio=18,  dialout=20, uucp=14
# CentOS/RedHat:      audio=63,  dialout=18, uucp=14
# Debian/Ubuntu:      audio=29,  dialout=20, uucp=10
# Linux from Scratch: audio=11,  dialout=10, uucp=32
# openSUSE (old):     audio=17,  dialout=16, uucp=14
# openSUSE (new):     audio=492, dialout=490
# Raspberry Pi OS:    audio=29,  dialout=20, uucp=10, gpio=997
NEW_USER_ID=${USER_ID:-9001}
NEW_GROUP_ID=${GROUP_ID:-$NEW_USER_ID}
echo "Starting with openhab user id: $NEW_USER_ID and group id: $NEW_GROUP_ID"
if ! id -u openhab >/dev/null 2>&1; then
  if [ -z "$(getent group $NEW_GROUP_ID)" ]; then
    echo "Create group openhab with id ${NEW_GROUP_ID}"
    groupadd -g $NEW_GROUP_ID openhab
  else
    group_name=$(getent group $NEW_GROUP_ID | cut -d: -f1)
    echo "Rename group $group_name to openhab"
    groupmod --new-name openhab $group_name
  fi
  echo "Create user openhab with id ${NEW_USER_ID}"
  adduser -u $NEW_USER_ID -D -g '' -h ${OPENHAB_HOME} -G openhab openhab
  groupadd -g 29 audio2
  groupadd -g 32 uucp2
  groupadd -g 63 audio3
  groupadd -g 490 dialout2
  groupadd -g 492 audio4
  groupadd -g 997 gpio
  adduser openhab audio
  adduser openhab audio2
  adduser openhab audio3
  adduser openhab audio4
  adduser openhab dialout
  adduser openhab dialout2
  adduser openhab gpio
  adduser openhab uucp
  adduser openhab uucp2

  chown root:uucp /var/lock
  chmod g+w /var/lock
fi

initialize_volume() {
  volume="$1"
  source="$2"

  if [ -z "$(ls -A "$volume")" ]; then
    echo "Initializing empty volume ${volume} ..."
    cp -av "${source}/." "${volume}/"
  fi
}

# Initialize empty volumes and update userdata
initialize_volume "${OPENHAB_CONF}" "${OPENHAB_HOME}/dist/conf"
initialize_volume "${OPENHAB_USERDATA}" "${OPENHAB_HOME}/dist/userdata"

# Update userdata if versions do not match
if [ ! -z $(cmp "${OPENHAB_USERDATA}/etc/version.properties" "${OPENHAB_HOME}/dist/userdata/etc/version.properties") ]; then
  echo "Image and userdata versions differ! Starting an upgrade." | tee "${OPENHAB_LOGDIR}/update.log"

  # Make a backup of userdata
  backup_file=userdata-$(date +"%FT%H-%M-%S").tar
  if [ ! -d "${OPENHAB_BACKUPS}" ]; then
    mkdir "${OPENHAB_BACKUPS}"
  fi
  tar -c -f "${OPENHAB_BACKUPS}/${backup_file}" --exclude "backup/*" "${OPENHAB_USERDATA}"
  echo "You can find backup of userdata in ${OPENHAB_BACKUPS}/${backup_file}" | tee -a "${OPENHAB_LOGDIR}/update.log"

  exec "${OPENHAB_HOME}/runtime/bin/update" 2>&1 | tee -a "${OPENHAB_LOGDIR}/update.log"
fi

# Set openhab folder permission
chown -R openhab:openhab "${OPENHAB_HOME}"
sync

# Run s6-style init continuation scripts if dir exists and s6 is not installed
if [ -d /etc/cont-init.d ] && [ $(ls /bin/s6-* 2>/dev/null | wc -l) == 0 ]; then
  for script in $(find /etc/cont-init.d -type f | grep -v \~ | sort); do
    . "${script}"
  done
fi

# sync again after continuation scripts have been run
sync

# Use server mode with the default command when there is no pseudo-TTY
if [ "$interactive" == "false" ] && [ "$(IFS=" "; echo "$@")" == "su-exec openhab tini -s ./start.sh" ]; then
  command=($@ server)
  exec "${command[@]}"
else
  exec "$@"
fi