PCI_ER="^[0-9a-fA-F]{4}:[0-9a-fA-F]{2}:[0-9a-fA-F]{2}\.[0-9a-fA-F]{1}"

# Get values in synoinfo.conf K=V file
# 1 - key
function _get_conf_kv() {
  grep "${1}=" /etc/synoinfo.conf | sed "s|^${1}=\"\(.*\)\"$|\1|g"
}

# Replace/add values in synoinfo.conf K=V file
# Args: $1 rd|hd, $2 key, $3 val
function _set_conf_kv() {
  local ROOT
  local FILE
  [ "$1" = "rd" ] && ROOT="" || ROOT="/tmpRoot"
  for SD in etc etc.defaults; do
    FILE="${ROOT}/${SD}/synoinfo.conf"
    # Replace
    if grep -q "^$2=" ${FILE}; then
      sed -i ${FILE} -e "s\"^$2=.*\"$2=\\\"$3\\\"\""
    else
      # Add if doesn't exist
      echo "$2=\"$3\"" >>${FILE}
    fi
  done
}

# Check if the user has customized the key
# Args: $1 rd|hd, $2 key
function _check_post_k() {
  local ROOT
  [ "$1" = "rd" ] && ROOT="" || ROOT="/tmpRoot"
  if grep -q -r "^_set_conf_kv.*${2}.*" "${ROOT}/sbin/init.post"; then
    return 0 # true
  else
    return 1 # false
  fi
}

# Check if the raid has been completed currently
function _check_rootraidstatus() {
  if [ "$(_get_conf_kv supportraid)" != "yes" ]; then
    return 0
  fi
  State=$(cat /sys/block/md0/md/array_state) 2>/dev/null
  if [ $? != 0 ]; then
    return 1
  fi
  case ${State} in
  "clear" | "inactive" | "suspended " | "readonly" | "read-auto")
    return 1
    ;;
  esac
  return 0
}

# Calculate # 0 bits
function getNum0Bits() {
  local VALUE=$1
  local NUM=0
  while [ $((${VALUE} % 2)) -eq 0 -a ${VALUE} -ne 0 ]; do
    NUM=$((${NUM} + 1))
    VALUE=$((${VALUE} / 2))
  done
  echo ${NUM}
}

# USB ports
function getUsbPorts() {
  for I in $(ls -d /sys/bus/usb/devices/usb*); do
    # ROOT
    DCLASS=$(cat ${I}/bDeviceClass)
    [ "${DCLASS}" != "09" ] && continue
    SPEED=$(cat ${I}/speed)
    [ ${SPEED} -lt 480 ] && continue
    RBUS=$(cat ${I}/busnum)
    RCHILDS=$(cat ${I}/maxchild)
    HAVE_CHILD=0
    for C in $(seq 1 ${RCHILDS}); do
      SUB="${RBUS}-${C}"
      if [ -d "${I}/${SUB}" ]; then
        DCLASS=$(cat ${I}/${SUB}/bDeviceClass)
        [ "${DCLASS}" != "09" ] && continue
        SPEED=$(cat ${I}/${SUB}/speed)
        [ ${SPEED} -lt 480 ] && continue
        CHILDS=$(cat ${I}/${SUB}/maxchild)
        HAVE_CHILD=1
        for N in $(seq 1 ${CHILDS}); do
          echo -n "${RBUS}-${C}.${N} "
        done
      fi
    done
    if [ ${HAVE_CHILD} -eq 0 ]; then
      for N in $(seq 1 ${RCHILDS}); do
        echo -n "${RBUS}-${N} "
      done
    fi
  done
  echo
}

# SATA ports
# 1 - is DT model
function getSataPorts() {
  local SATA_PORTS=$(ls /sys/class/ata_port | wc -w)
  local OUTPUT=""
  for I in $(seq 1 ${SATA_PORTS}); do
    DUMMY=$((1 - $(cat /sys/class/ata_port/ata${I}/device/host*/scsi_host/host*/syno_port_thaw)))
    # Is DT
    if [ "${1}" = "true" ]; then
      [ ${DUMMY} -eq 1 ] && continue
      PORTNO=$(cat /sys/class/ata_port/ata${I}/port_no)
      _PATH=$(readlink /sys/class/ata_port/ata${I} | sed 's|^.*\(pci.*\)|\1|' | cut -d'/' -f2-)
      DSMPATH=""
      while true; do
        FIRST=$(echo "${_PATH}" | cut -d'/' -f1)
        echo "${FIRST}" | grep -qE "${PCI_ER}" || break
        [ -z "${DSMPATH}" ] &&
          DSMPATH="$(echo "${FIRST}" | cut -d':' -f2-)" ||
          DSMPATH="${DSMPATH},$(echo "${FIRST}" | cut -d':' -f3)"
        _PATH=$(echo ${_PATH} | cut -d'/' -f2-)
      done
      echo -n "${DSMPATH}:${PORTNO} "
    else
      if [ ${DUMMY} -eq 1 ]; then
        OUTPUT="0${OUTPUT}"
      else
        OUTPUT="1${OUTPUT}"
      fi
    fi
  done
  echo "${OUTPUT}"
}

# NVME ports
# 1 - is DT model
function nvmePorts() {
  local NVME_PORTS=$(ls /sys/class/nvme | wc -w)
  for I in $(seq 0 $((${NVME_PORTS} - 1))); do
    _PATH=$(readlink /sys/class/nvme/nvme${I} | sed 's|^.*\(pci.*\)|\1|' | cut -d'/' -f2-)
    if [ "${1}" = "true" ]; then
      # Device-tree: assemble complete path in DSM format
      DSMPATH=""
      while true; do
        FIRST=$(echo "${_PATH}" | cut -d'/' -f1)
        echo "${FIRST}" | grep -qE "${PCI_ER}" || break
        [ -z "${DSMPATH}" ] &&
          DSMPATH="$(echo "${FIRST}" | cut -d':' -f2-)" ||
          DSMPATH="${DSMPATH},$(echo "${FIRST}" | cut -d':' -f3)"
        _PATH=$(echo ${_PATH} | cut -d'/' -f2-)
      done
    else
      # Non-dt: just get PCI ID
      DSMPATH=$(echo "${_PATH}" | cut -d'/' -f1)
    fi
    echo -n "${DSMPATH} "
  done
  echo
}

#
function dtModel() {
  DEST="/exts/model.dts"
  if [ ! -f "${DEST}" ]; then # Users can put their own dts.
    echo "/dts-v1/;" >${DEST}
    echo "/ {" >>${DEST}
    echo "    compatible = \"Synology\";" >>${DEST}
    echo "    model = \"${1}\";" >>${DEST}
    echo "    version = <0x01>;" >>${DEST}
    # SATA ports
    I=1
    while true; do
      [ ! -d /sys/block/sata${I} ] && break
      PCIEPATH=$(grep 'pciepath' /sys/block/sata${I}/device/syno_block_info | cut -d'=' -f2)
      ATAPORT=$(grep 'ata_port_no' /sys/block/sata${I}/device/syno_block_info | cut -d'=' -f2)
      echo "    internal_slot@${I} {" >>${DEST}
      echo "        protocol_type = \"sata\";" >>${DEST}
      echo "        ahci {" >>${DEST}
      echo "            pcie_root = \"${PCIEPATH}\";" >>${DEST}
      echo "            ata_port = <0x$(printf '%02X' ${ATAPORT})>;" >>${DEST}
      echo "        };" >>${DEST}
      echo "    };" >>${DEST}
      I=$((${I} + 1))
    done
    NUMPORTS=$((${I} - 1))
    if [ $NUMPORTS -eq 1 ]; then
      # fix isSingleBay issue:
      #   if maxdisks is 1, there is no create button in the storage panel
      NUMPORTS=2
    fi
    _set_conf_kv rd "maxdisks" "${NUMPORTS}"
    echo "maxdisks=${NUMPORTS}"

    # NVME ports
    COUNT=1
    for P in $(nvmePorts true); do
      echo "    nvme_slot@${COUNT} {" >>${DEST}
      echo "        pcie_root = \"${P}\";" >>${DEST}
      echo "        port_type = \"ssdcache\";" >>${DEST}
      echo "    };" >>${DEST}
      COUNT=$((${COUNT} + 1))
    done

    # USB ports
    COUNT=1
    for I in $(getUsbPorts); do
      echo "    usb_slot@${COUNT} {" >>${DEST}
      echo "      usb2 {" >>${DEST}
      echo "        usb_port =\"${I}\";" >>${DEST}
      echo "      };" >>${DEST}
      echo "      usb3 {" >>${DEST}
      echo "        usb_port =\"${I}\";" >>${DEST}
      echo "      };" >>${DEST}
      echo "    };" >>${DEST}
      COUNT=$((${COUNT} + 1))
    done
    echo "};" >>${DEST}
  fi
  dtc -I dts -O dtb ${DEST} >/etc/model.dtb
  cp -fv /etc/model.dtb /run/model.dtb
  /usr/syno/bin/syno_slot_mapping
}

#
function nondtModel() {
  local SATA_PORTS=0
  local SAS_PORTS=0
  local NUMPORTS=0
  local ESATAPORTCFG=$(($(_get_conf_kv esataportcfg)))
  local INTPORTCFG
  local USBPORTCFG=$(($(_get_conf_kv usbportcfg)))
  local COUNT=1
  if _check_post_k "rd" "maxdisks"; then
    NUMPORTS=$(($(_get_conf_kv maxdisks)))
    echo "get maxdisks=${NUMPORTS}"
  else
    # sysfs is populated here
    SATA_PORTS=$(ls /sys/class/ata_port | wc -w)
    [ -d '/sys/class/sas_phy' ] && SAS_PORTS=$(ls /sys/class/sas_phy | wc -w)
    [ -d '/sys/class/scsi_disk' ] && SCSI_PORTS=$(ls /sys/class/scsi_disk | wc -w)
    NUMPORTS=$((${SATA_PORTS} + ${SAS_PORTS} + ${SCSI_PORTS}))
    # Raidtool will read maxdisks, but when maxdisks is greater than 27, formatting error will occur 8%.
    if ! _check_rootraidstatus && [ ${NUMPORTS} -gt 26 ]; then
      _set_conf_kv rd "maxdisks" "26"
      echo "set maxdisks=26"
    else
      _set_conf_kv rd "maxdisks" "${NUMPORTS}"
      echo "set maxdisks=${NUMPORTS}"
    fi
  fi
  if ! _check_post_k "rd" "internalportcfg"; then
    INTPORTCFG="0x$(printf "%x" $((2 ** ${NUMPORTS} - 1 - ${ESATAPORTCFG})))"
    _set_conf_kv rd "internalportcfg" "${INTPORTCFG}"
    echo "set internalportcfg=${INTPORTCFG}"
    echo "get esataportcfg=${ESATAPORTCFG}"
  fi
  if ! _check_post_k "rd" "internalportcfg"; then
    # USB ports static, always 4 ports
    USBPORT_IDX=$(getNum0Bits ${USBPORTCFG})
    [ ${USBPORT_IDX} -lt ${NUMPORTS} ] && USBPORT_IDX=${NUMPORTS}
    USBPORTCFG="0x$(printf '%x' $((15 * 2 ** ${USBPORT_IDX})))"
    _set_conf_kv rd "usbportcfg" "${USBPORTCFG}"
    echo "set usbportcfg=${USBPORTCFG}"
  fi
  # NVME
  rm -f /etc/extensionPorts
  echo "[pci]" >/etc/extensionPorts
  chmod 755 /etc/extensionPorts
  for P in $(nvmePorts false); do
    echo "pci${COUNT}=\"${P}\"" >>/etc/extensionPorts
    COUNT=$((${COUNT} + 1))
  done

  # log
  echo "maxdisks=${NUMPORTS}"
  echo "internalportcfg=${INTPORTCFG}"
  echo "esataportcfg=${ESATAPORTCFG}"
  echo "usbportcfg=${USBPORTCFG}"

}

if [ $(mount | grep tmpRoot | wc -l) -gt 0 ]; then
  HASBOOTED="yes"
  echo "System passed junior"
else
  echo "System is booting"
  HASBOOTED="no"
fi

[ -f /etc/model.dtb ] || [ -f /etc.defaults/model.dtb ] && ISDTMODEL="true"

#
if [ "$HASBOOTED" = "no" ]; then

  cp -vf dtc /usr/sbin/
  cp -vf readlink /usr/sbin/
  cp -vf sed /usr/sbin/sed

  chmod 755 /usr/sbin/dtc /usr/sbin/readlink /usr/sbin/sed

  echo "Adjust disks related configs automatically - patches"
  [ "$ISDTMODEL" = "true" ] && dtModel ${3} || nondtModel

elif [ "$HASBOOTED" = "yes" ]; then

  cp -vf dtc /tmpRoot/usr/sbin/
  cp -vf readlink /tmpRoot/usr/sbin/
  cp -vf sed /tmpRoot/usr/sbin/sed

  chmod 755 /tmpRoot/usr/sbin/dtc /tmpRoot/usr/sbin/readlink /tmpRoot/usr/sbin/sed

  echo "Adjust disks related configs automatically - late"
  if [ "$ISDTMODEL" = "true" ]; then
    echo "Copying /etc.defaults/model.dtb"
    # copy file
    cp -vf /etc/model.dtb /tmpRoot/etc/model.dtb
    cp -vf /etc/model.dtb /tmpRoot/etc.defaults/model.dtb
  else
    echo "Adjust maxdisks and internalportcfg automatically"
    # sysfs is unpopulated here, get the values from junior synoinfo.conf
    NUMPORTS=$(_get_conf_kv maxdisks)
    INTPORTCFG=$(_get_conf_kv internalportcfg)
    USBPORTCFG=$(_get_conf_kv usbportcfg)
    [ ${NUMPORTS} -gt 16 ] && _set_conf_kv hd "maxdisks" "${NUMPORTS}" || _set_conf_kv hd "maxdisks" "${NUMPORTS}"
    _set_conf_kv hd "internalportcfg" "${INTPORTCFG}"
    _set_conf_kv hd "usbportcfg" "${USBPORTCFG}"
    # log
    echo "maxdisks=${NUMPORTS}"
    echo "internalportcfg=${INTPORTCFG}"
    echo "usbportcfg=${USBPORTCFG}"
    cp -vf /etc/extensionPorts /tmpRoot/etc/extensionPorts
    cp -vf /etc/extensionPorts /tmpRoot/etc.defaults/extensionPorts
  fi
fi