#!/usr/bin/env bash

# SPDX-FileCopyrightText: 2024 3mdeb <contact@3mdeb.com>
#
# SPDX-License-Identifier: Apache-2.0

# shellcheck source=../include/dts-environment.sh
source $DTS_ENV
# shellcheck source=../include/dts-functions.sh
source $DTS_FUNCS

[ -z "$SYSTEM_VENDOR" ] && error_exit "SYSTEM_VENDOR not given"
[ -z "$SYSTEM_MODEL" ] && error_exit "SYSTEM_MODEL not given"

CMD="$1"
FUM="$2"

ask_for_version() {
  while : ; do
    echo
    echo "Please, select Dasharo firmware version to install"

    # -v: True if the shell variable varname is set (has been assigned a value).
    if [ -v BIOS_HASH_LINK_COMM ]; then
      echo "  c) Community version"
    fi
    if [ -v BIOS_HASH_LINK_DPP ]; then
      if [ -v DPP_IS_LOGGED ]; then
        echo "  d) DPP version (coreboot + UEFI)"
      else
        echo "  DPP version (coreboot + UEFI) available, if you are interested, please visit https://shop.3mdeb.com/product-category/dasharo-entry-subscription/"
      fi
    fi
    if [ -v BIOS_HASH_LINK_DPP_SEABIOS ]; then
      if [ -v DPP_IS_LOGGED ]; then
        echo "  s) DPP version (coreboot + SeaBIOS)"
      else
        echo "  DPP version (coreboot + SeaBIOS) available, if you are interested, please visit https://shop.3mdeb.com/product-category/dasharo-entry-subscription/"
      fi
    fi
    echo "  b) Back to main menu"
    echo
    read -r -p "Enter an option: " OPTION
    echo

    case ${OPTION} in
      c|C|comm|community|COMMUNITY|COMM|Community)
        if [ -v BIOS_HASH_LINK_COMM ]; then
          BIOS_LINK=$BIOS_LINK_COMM
          BIOS_HASH_LINK=$BIOS_HASH_LINK_COMM
          BIOS_SIGN_LINK=$BIOS_SIGN_LINK_COMM
          if [ -v EC_HASH_LINK_COMM ]; then
            EC_LINK=$EC_LINK_COMM
            EC_HASH_LINK=$EC_HASH_LINK_COMM
            EC_SIGN_LINK=$EC_SIGN_LINK_COMM
          fi
          echo "Community version selected"
          break
        else
          error_exit "Bad option or resignation. Returning to main menu..."
        fi
        ;;
      d|D|dpp|DPP|Dpp)
        if [ -v BIOS_HASH_LINK_DPP ]; then
          BIOS_LINK=$BIOS_LINK_DPP
          BIOS_HASH_LINK=$BIOS_HASH_LINK_DPP
          BIOS_SIGN_LINK=$BIOS_SIGN_LINK_DPP
          if [ -v EC_HASH_LINK_DPP ]; then
            EC_LINK=$EC_LINK_DPP
            EC_HASH_LINK=$EC_HASH_LINK_DPP
            # shellcheck disable=SC2034
            EC_SIGN_LINK=$EC_SIGN_LINK_DPP
          fi
          echo "Dasharo Entry Subscription (coreboot + edk2) version selected"
          break
        else
          error_exit "Bad option. Returning to main menu..."
        fi
        ;;
      s|S|sea|seabios|SeaBIOS)
        if [ -v BIOS_HASH_LINK_DPP_SEABIOS ]; then
          BIOS_LINK=$BIOS_LINK_DPP_SEABIOS
          BIOS_HASH_LINK=$BIOS_HASH_LINK_DPP_SEABIOS
          BIOS_SIGN_LINK=$BIOS_SIGN_LINK_DPP_SEABIOS
          echo "Dasharo Entry Subscription (coreboot + SeaBIOS) version selected"
          break
        else
          error_exit "Bad option. Returning to main menu..."
        fi
        ;;
      b|B)
        echo "Returning to main menu..."
        exit 0
        ;;
      *)
        ;;
    esac
  done
}

display_flashing_warning() {
  while : ; do
    echo
    print_warning "Please verify detected hardware!"
    echo

    if [ -v SYSTEM_VENDOR ]; then
      echo "Board vendor: $SYSTEM_VENDOR"
    fi
    if [ -v SYSTEM_MODEL ]; then
      echo "System model: $SYSTEM_MODEL"
    fi
    if [ -v BOARD_MODEL ]; then
      echo "Board model: $BOARD_MODEL"
    fi
    echo
    read -r -p "Does it match your actual specification? (Y|n) " OPTION
    echo

    case ${OPTION} in
      yes|y|Y|Yes|YES)
        break
        ;;
      n|N)
        echo "Returning to main menu..."
        exit 0
        ;;
      *)
        ;;
    esac
  done

  while : ; do
    echo "Following firmware will be used to install Dasharo"
    if [ -v BIOS_HASH_LINK ]; then
      local _bios_hash
      _bios_hash="$(cat $BIOS_HASH_FILE | cut -d ' ' -f 1)"
      echo "Dasharo BIOS firmware:"
      echo "  - link: $BIOS_LINK"
      echo "  - hash: $_bios_hash"
    fi
    if [ -v EC_HASH_LINK ]; then
      local _ec_hash
      _ec_hash="$(cat $EC_HASH_FILE | cut -d ' ' -f 1)"
      echo "Dasharo EC firmware:"
      echo "  - link: $EC_LINK"
      echo "  - hash: $_ec_hash"
    fi
    echo
    echo "You can learn more about this release on: https://docs.dasharo.com/"

    if check_if_dasharo; then
        echo
        read -r -p "Do you want to update Dasharo firmware on your hardware? (Y|n) " OPTION
        echo
    else
        echo
        if [ "$CAN_INSTALL_BIOS" == "false" ] && [ "$SYSTEM_VENDOR" == "Notebook" ]; then
          echo "Notebook supports installation of only EC firmware!"
          echo "Dasharo BIOS will have to be flashed manually. More on:"
          echo "https://docs.dasharo.com/unified/novacustom/initial-deployment/"
        fi
        read -r -p "Do you want to install Dasharo firmware on your hardware? (Y|n) " OPTION
        echo
    fi

    case ${OPTION} in
      yes|y|Y|Yes|YES)
        break
        ;;
      n|N)
        echo "Returning to main menu..."
        exit 0
        ;;
      *)
        ;;
    esac
  done
}

backup() {
  rm -rf "$FW_BACKUP_DIR"
  mkdir -p "$FW_BACKUP_DIR"

  echo "Backing up BIOS firmware and store it locally..."
  echo "Remember that firmware is also backed up in HCL report."
  check_intel_regions
  if [ $BOARD_HAS_FD_REGION -eq 1 ]; then
    # Use safe defaults. Descriptor may contain additional regions not detected
    # by flashrom and will return failure when attempted to be read. BIOS and
    # Flash descriptor regions should always be readable. If not, then we have
    # some ugly case, hard to deal with.
    FLASHROM_ADD_OPT_READ="--ifd -i fd -i bios"
    if [ $BOARD_HAS_ME_REGION -eq 1 ] && [ $BOARD_ME_REGION_LOCKED -eq 0 ]; then
      # ME region is not locked, read it as well
      FLASHROM_ADD_OPT_READ+=" -i me"
    fi
    if [ $BOARD_HAS_GBE_REGION -eq 1 ] && [ $BOARD_GBE_REGION_LOCKED -eq 0 ]; then
      # GBE region is present and not locked, read it as well
      FLASHROM_ADD_OPT_READ+=" -i gbe"
    fi
  else
      # No descriptor, probably safe to read everything
      FLASHROM_ADD_OPT_READ=""
  fi
  $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} -r "${FW_BACKUP_DIR}"/rom.bin ${FLASHROM_ADD_OPT_READ} >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
  error_check "Failed to read BIOS firmware backup"

  if [ "$HAVE_EC" == "true" ]; then
    echo "Checking for Open Source Embedded Controller firmware"
    $DASHARO_ECTOOL info >> $ERR_LOG_FILE 2>&1
    if [ $? -eq 0 ]; then
      echo "Device has already Open Source Embedded Controller firmware, do not backup EC..."
    else
      echo "Backing up EC firmware..."
      $FLASHROM -p "$PROGRAMMER_EC" ${FLASH_CHIP_SELECT} -r "${FW_BACKUP_DIR}"/ec.bin >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
      error_check "Failed to read EC firmware backup"
    fi
  fi

  echo "Saving backup to: $FW_BACKUP_TAR"
  tar --gzip -cf "$FW_BACKUP_TAR" "$FW_BACKUP_DIR"
  error_check "Failed to create firmware backup archive"
  rm -rf "${FW_BACKUP_DIR}"

  echo "Successfully backed up firmware locally at: $FW_BACKUP_TAR"
}

romhole_migration() {
    cbfstool $BIOS_UPDATE_FILE layout -w | grep -q "ROMHOLE" || return

    $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} -r /tmp/rom.bin --ifd -i bios >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
    error_check "Failed to read current firmware to migrate MSI ROMHOLE"
    if check_if_dasharo; then
      cbfstool /tmp/rom.bin layout -w | grep -q "ROMHOLE" || return
      # This one is rather unlikely to fail, but just in case print a warning
      cbfstool /tmp/rom.bin read -r ROMHOLE -f /tmp/romhole.bin 2> /dev/null
      if [ $? -ne 0 ]; then
        print_warning "Failed to migrate MSI ROMHOLE, your platform's unique SMBIOS/DMI data may be lost"
        return
      fi
    else
      dd if=/tmp/rom.bin of=/tmp/romhole.bin skip=$((0x17C0000)) bs=128K count=1 iflag=skip_bytes > /dev/null 2>&1
    fi

    cbfstool "$BIOS_UPDATE_FILE" write -r ROMHOLE -f /tmp/romhole.bin -u 2> /dev/null
}

smbios_migration() {
  echo -n "$(dmidecode -s system-uuid)" > $SYSTEM_UUID_FILE
  echo -n "$(dmidecode -s baseboard-serial-number)" > $SERIAL_NUMBER_FILE

  COREBOOT_SEC=$(cbfstool $BIOS_UPDATE_FILE layout -w | grep "COREBOOT")
  FW_MAIN_A_SEC=$(cbfstool $BIOS_UPDATE_FILE layout -w | grep "FW_MAIN_A")
  FW_MAIN_B_SEC=$(cbfstool $BIOS_UPDATE_FILE layout -w | grep "FW_MAIN_B")

  if [ -n "$COREBOOT_SEC" ]; then
    # if the migration can be done there for sure will be COREBOOT section
    echo "Beginning SMBIOS migration process..."
    echo "Migrate to COREBOOT section."
    cbfstool $BIOS_UPDATE_FILE add -f $SERIAL_NUMBER_FILE -n serial_number -t raw -r COREBOOT
    cbfstool $BIOS_UPDATE_FILE add -f $SYSTEM_UUID_FILE -n system_uuid -t raw -r COREBOOT
  fi

  if [ -n "$FW_MAIN_A_SEC" ]; then
    echo "Migrate to FW_MAIN_A section."
    cbfstool $BIOS_UPDATE_FILE expand -r FW_MAIN_A
    cbfstool $BIOS_UPDATE_FILE add -f $SERIAL_NUMBER_FILE -n serial_number -t raw -r FW_MAIN_A
    cbfstool $BIOS_UPDATE_FILE add -f $SYSTEM_UUID_FILE -n system_uuid -t raw -r FW_MAIN_A
    cbfstool $BIOS_UPDATE_FILE truncate -r FW_MAIN_A
  fi

  if [ -n "$FW_MAIN_B_SEC" ]; then
    echo "Migrate to FW_MAIN_B section."
    cbfstool $BIOS_UPDATE_FILE expand -r FW_MAIN_B
    cbfstool $BIOS_UPDATE_FILE add -f $SERIAL_NUMBER_FILE -n serial_number -t raw -r FW_MAIN_B
    cbfstool $BIOS_UPDATE_FILE add -f $SYSTEM_UUID_FILE -n system_uuid -t raw -r FW_MAIN_B
    cbfstool $BIOS_UPDATE_FILE truncate -r FW_MAIN_B
  fi
}

smmstore_migration() {
    echo -n "Backing up firmware configuration... "
    $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} -r /tmp/dasharo_dump.rom ${FLASHROM_ADD_OPT_READ} --fmap -i FMAP -i SMMSTORE >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
    cbfstool /tmp/dasharo_dump.rom read -r SMMSTORE -f /tmp/smmstore.bin >> $ERR_LOG_FILE 2>&1 || \
      print_warning "Failed! Default settings will be used."
    cbfstool "$BIOS_UPDATE_FILE" write -r SMMSTORE -f /tmp/smmstore.bin -u >> $ERR_LOG_FILE 2>&1 || \
      print_warning "Failed! Default settings will be used."
    print_ok Done.
}

bootsplash_migration() {
    $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} -r /tmp/dasharo_dump.rom ${FLASHROM_ADD_OPT_READ} --fmap -i FMAP -i BOOTSPLASH >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
    # If no custom logo, return from bootsplash_migration early and don't show
    # unnecessary messages
    cbfstool /tmp/dasharo_dump.rom extract -r BOOTSPLASH -n logo.bmp -f /tmp/logo.bmp >> $ERR_LOG_FILE 2>&1 || return 1
    echo -n "Backing up custom boot logo... "
    dcu logo $BIOS_UPDATE_FILE -l /tmp/logo.bmp >> $ERR_LOG_FILE 2>&1 || \
      print_warning "Failed! Default boot splash will be used." || return 1
    print_ok Done.
}

resign_binary() {
  if [ "$HAVE_VBOOT" -eq 0 ]; then
    download_keys
    sign_firmware.sh $BIOS_UPDATE_FILE $KEYS_DIR $RESIGNED_BIOS_UPDATE_FILE
    error_check "Cannot resign binary file. Please, make sure if you have proper keys. Aborting..."
    BIOS_UPDATE_FILE="$RESIGNED_BIOS_UPDATE_FILE"
  fi
}

check_vboot_keys() {
  if [ "$HAVE_VBOOT" -eq 0 ]; then
    # If we flash whole BIOS region, no need to check if keys match
    grep -q "\--ifd" <<< "$FLASHROM_ADD_OPT_UPDATE" && grep -q "\-i bios" <<< "$FLASHROM_ADD_OPT_UPDATE" && return
    # No FMAP flashing? Also skip
    grep -q "\--fmap" <<< "$FLASHROM_ADD_OPT_UPDATE" || return

    BINARY_KEYS=$(CBFSTOOL=$(which cbfstool) futility show $BIOS_UPDATE_FILE| grep -i 'key sha1sum')

    if [ $BOARD_HAS_FD_REGION -eq 0 ]; then
      FLASHROM_ADD_OPT_READ=""
    else
      FLASHROM_ADD_OPT_READ="--ifd -i bios"
    fi
    echo "Checking vboot keys."
    $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} ${FLASHROM_ADD_OPT_READ} -r /tmp/bios.bin > /dev/null 2>/dev/null
    if [ $? -eq 0 ] && [ -f "/tmp/bios.bin" ]; then
      FLASH_KEYS=$(CBFSTOOL=$(which cbfstool) futility show /tmp/bios.bin | grep -i 'key sha1sum')
      diff <(echo "$BINARY_KEYS") <(echo "$FLASH_KEYS") > /dev/null 2>&1
      # If keys are different we must additionally flash at least GBB region as well
      if [ $? -ne 0 ]; then
        FLASHROM_ADD_OPT_UPDATE+=" -i GBB"
      fi
    fi
  fi
}

blob_transmission() {
  echo "Extracting the UEFI image from BIOS update"
  wget -O "$DBT_BIOS_UPDATE_FILENAME" --user-agent='Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)' "$DBT_BIOS_UPDATE_URL" >> $ERR_LOG_FILE 2>&1
  error_file_check "$DBT_BIOS_UPDATE_FILENAME" "Failed to download BIOS for $SYSTEM_MODEL. Please make sure Ethernet cable is connected and try again."

  sha256sum --check <(echo "$DBT_BIOS_UPDATE_HASH")
  error_check "Failed SHA-256 sum check on the downloaded BIOS for $SYSTEM_MODEL"

  binwalk --run-as=root -e "$DBT_BIOS_UPDATE_FILENAME" -C /tmp >> $ERR_LOG_FILE 2>&1
  error_file_check "$DBT_UEFI_IMAGE" "Failed to extract UEFI image from BIOS update"

  uefi-firmware-parser -e "$DBT_UEFI_IMAGE" -O >> $ERR_LOG_FILE 2>&1

  if [ -n "$SINIT_ACM_FILENAME" ] && [ -n "$SINIT_ACM_URL" ]; then
    echo "Downloading the Intel SINIT ACM"
    wget -O "$SINIT_ACM_FILENAME" "$SINIT_ACM_URL" >> $ERR_LOG_FILE 2>&1
    error_file_check "$SINIT_ACM_FILENAME" "Failed to download Intel SINIT ACM. Please make sure Ethernet cable is connected and try again."

    # Intel does not provide hash of the package, use SHA256 we know is good
    sha256sum --check <(echo "$SINIT_ACM_HASH")
    error_check "Failed SHA-256 sum check on the downloaded Intel SINIT ACM."

    unzip -o "$SINIT_ACM_FILENAME" -d /tmp >> $ERR_LOG_FILE 2>&1
    error_check "Failed to decompress Intel SINIT ACM package."
  fi

  echo "Beginning Dasharo Blobs Transmission process..."

  if [ -n "$SCH5545_FW" ]; then
    error_file_check "$SCH5545_FW" "Failed to find SCH5545 EC firmware binary."
    echo -n "Adding SCH5545 EC firmware..."
    cbfstool "$BIOS_UPDATE_FILE" add -f "$SCH5545_FW" -n sch5545_ecfw.bin -t raw
    print_ok "Done"
  fi

  if [ -n "$ACM_BIN" ]; then
    error_file_check "$ACM_BIN" "Failed to find BIOS ACM binary."
    echo -n "Adding BIOS ACM..."
    cbfstool "$BIOS_UPDATE_FILE" add -f "$ACM_BIN" -n txt_bios_acm.bin -t raw
    print_ok "Done"
  fi

  if [ -n "$SINIT_ACM" ]; then
    error_file_check "$SINIT_ACM" "Failed to find Intel SINIT ACM binary."
    echo -n "Adding SINIT ACM..."
    cbfstool "$BIOS_UPDATE_FILE" add -f "$SINIT_ACM" -n txt_sinit_acm.bin -t raw
    print_ok "Done"
  fi
}

install_ec() {
  verify_artifacts ec
  echo "Installing EC..."
  $FLASHROM -p "$PROGRAMMER_EC" ${FLASH_CHIP_SELECT} -w "$EC_UPDATE_FILE" >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
  error_check "Failed to install Dasharo EC firmware"
  echo "Successfully installed Dasharo EC firmware"
}

install() {
  ask_for_version
  if [ "$CAN_INSTALL_BIOS" == "false" ]; then
    download_ec
    unset BIOS_HASH_LINK
    display_flashing_warning
  else
    download_artifacts
    display_flashing_warning
    check_flash_lock
    verify_artifacts bios

    check_intel_regions
    check_blobs_in_binary $BIOS_UPDATE_FILE
    check_if_me_disabled
    set_intel_regions_update_params "-N --ifd -i bios"
  fi

  if [ "$HAVE_EC" == "true" ]; then
    echo "Checking for Open Source Embedded Controller firmware"
    $DASHARO_ECTOOL info >> $ERR_LOG_FILE 2>&1
    if [ $? -eq 0 ]; then
      echo "Device has already Open Source Embedded Controller firmware, do not flash EC..."
    else
      _ec_fw_version=$($FLASHROM -p "$PROGRAMMER_EC" ${FLASH_CHIP_SELECT} | grep "Mainboard EC Version" | tr -d ' ' | cut -d ':' -f 2)
      if [ "$_ec_fw_version" != "$COMPATIBLE_EC_FW_VERSION" ]; then
        print_warning "EC version: $_ec_fw_version is not supported, update required"
        install_ec
      fi
    fi
  fi

  if [ "$CAN_INSTALL_BIOS" == "true" ]; then
    cbfstool "$BIOS_UPDATE_FILE" extract -r COREBOOT -n config -f "$BIOS_UPDATE_CONFIG_FILE"
    grep "CONFIG_VBOOT=y" "$BIOS_UPDATE_CONFIG_FILE"
    HAVE_VBOOT="$?"

    if [ "$NEED_ROMHOLE_MIGRATION" = "true" ]; then
      romhole_migration
    fi

    if [ "$NEED_BOOTSPLASH_MIGRATION" = "true" ]; then
      bootsplash_migration
    fi

    if [ "$NEED_SMBIOS_MIGRATION" = "true" ]; then
      smbios_migration
      resign_binary
    fi

    if [ "$NEED_BLOB_TRANSMISSION" = "true" ]; then
      blob_transmission
    fi

    echo "Installing Dasharo firmware..."
    # FIXME: It seems we do not have an easy way to add some flasrhom extra args
    # globally for specific platform and variant
    local _flashrom_extra_args=""
    if [ "${BIOS_LINK}" = "${BIOS_LINK_DPP_SEABIOS}" ]; then
      _flashrom_extra_args="--fmap -i COREBOOT"
    fi
    $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} ${FLASHROM_ADD_OPT_REGIONS} -w "$BIOS_UPDATE_FILE" ${_flashrom_extra_args} >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
    error_check "Failed to install Dasharo firmware"

    print_ok "Successfully installed Dasharo firmware"
  fi

  echo -n "Syncing disks... "
  sync
  echo "Done."
  if [ "$NEED_EC_RESET" = "true" ]; then
    echo "The computer will shut down automatically in 5 seconds"
  else
    echo "The computer will reboot automatically in 5 seconds"
  fi
  sleep 0.5
  echo "Rebooting in 5s:"
  echo "5..."
  sleep 1
  echo "4..."
  sleep 1
  echo "3..."
  sleep 1
  echo "2..."
  sleep 1
  echo "1..."
  sleep 0.5
  echo "Rebooting"
  sleep 1
  if [ "$NEED_EC_RESET" = "true" ]; then
    it5570_shutdown
  else
    send_dts_logs
    ${CMD_REBOOT}
  fi
}

update_ec() {
  verify_artifacts ec
  echo "Updating EC..."
  $DASHARO_ECTOOL flash "$EC_UPDATE_FILE" &>> $ERR_LOG_FILE
  error_check "Failed to update EC firmware"
}

update() {
  local _can_switch_to_heads="false"

  sync_clocks
  check_if_ac
  error_check "Firmware update process interrupted on user request."

  echo "Checking for the latest Dasharo update available..."
  echo "Current Dasharo version: $DASHARO_VERSION"
  if [ -v DPP_IS_LOGGED ]; then
    if [ -v DASHARO_REL_VER_DPP ]; then
      if [ "$DASHARO_FLAVOR" != "Dasharo (coreboot+heads)" ]; then
        echo "Latest available Dasharo version: $DASHARO_REL_VER_DPP"
      fi
      curl -sfI -u "$USER_DETAILS" -H "$CLOUD_REQUEST" "$BIOS_LINK_DPP" -o /dev/null
      if [ $? -ne 0 ]; then
        echo "Current DPP credentials do not match the current platform/firmware flavor."
        echo "Latest possible and available update is $DASHARO_REL_VER"
        BIOS_HASH_LINK=$BIOS_HASH_LINK_COMM
        BIOS_SIGN_LINK=$BIOS_SIGN_LINK_COMM
        BIOS_LINK=$BIOS_LINK_COMM
        if [ "$HAVE_EC" == "true" ]; then
          EC_HASH_LINK=$EC_HASH_LINK_COMM
          EC_SIGN_LINK=$EC_SIGN_LINK_COMM
          EC_LINK=$EC_LINK_COMM
        fi
        UPDATE_VERSION=$DASHARO_REL_VER
      else
        BIOS_HASH_LINK=$BIOS_HASH_LINK_DPP
        BIOS_SIGN_LINK=$BIOS_SIGN_LINK_DPP
        BIOS_LINK=$BIOS_LINK_DPP
        if [ "$HAVE_EC" == "true" ]; then
          EC_HASH_LINK=$EC_HASH_LINK_DPP
          EC_SIGN_LINK=$EC_SIGN_LINK_DPP
          EC_LINK=$EC_LINK_DPP
        fi
        UPDATE_VERSION=$DASHARO_REL_VER_DPP
      fi
    else
      if [ "$DASHARO_FLAVOR" != "Dasharo (coreboot+heads)" ]; then
        echo "Latest available Dasharo version: $DASHARO_REL_VER"
      fi
      BIOS_HASH_LINK=$BIOS_HASH_LINK_COMM
      BIOS_SIGN_LINK=$BIOS_SIGN_LINK_COMM
      BIOS_LINK=$BIOS_LINK_COMM
      if [ "$HAVE_EC" == "true" ]; then
        EC_HASH_LINK=$EC_HASH_LINK_COMM
        EC_SIGN_LINK=$EC_SIGN_LINK_COMM
        EC_LINK=$EC_LINK_COMM
      fi
      UPDATE_VERSION=$DASHARO_REL_VER
    fi
    if [ -v HAVE_HEADS_FW ] && [ "$DASHARO_FLAVOR" != "Dasharo (coreboot+heads)" ]; then
      # Check if given DPP credentials give access to heads, if not,
      # then it means DPP is for regular releases
      curl -sfI -u "$USER_DETAILS" -H "$CLOUD_REQUEST" "$HEADS_LINK_DPP" -o /dev/null
      if [ $? -ne 0 ]; then
        print_warning "Dasharo Heads firmware version is available, but your"
        print_warning "subscription does not give you the access to this firmware."
        print_warning "If you are interested, please visit https://shop.3mdeb.com/product-category/dasharo-entry-subscription/"
      else
        # Access to the heads FW is possible, allow to switch to heads
        _can_switch_to_heads="true"
        print_ok "Dasharo Heads firmware version is available and your subscription"
        print_ok "gives you access to this firmware."
      fi
    elif [ -v HAVE_HEADS_FW ] && [ "$DASHARO_FLAVOR" == "Dasharo (coreboot+heads)" ]; then
      # Set the switch flag to offer switch back
      echo "Latest available Dasharo version: $HEADS_REL_VER_DPP"
      _can_switch_to_heads="true"
    fi
  else
    if [ -v DASHARO_REL_VER_DPP ]; then
      print_green "DPP version (coreboot + UEFI) available, if you are interested"
      print_ok "please visit https://shop.3mdeb.com/product-category/dasharo-entry-subscription/"
    fi
    if [ "$DASHARO_FLAVOR" != "Dasharo (coreboot+heads)" ]; then
      echo "Latest available Dasharo version: $DASHARO_REL_VER"
    fi
    BIOS_HASH_LINK=$BIOS_HASH_LINK_COMM
    # shellcheck disable=SC2034
    BIOS_SIGN_LINK=$BIOS_SIGN_LINK_COMM
    BIOS_LINK=$BIOS_LINK_COMM
    if [ "$HAVE_EC" == "true" ]; then
      EC_HASH_LINK=$EC_HASH_LINK_COMM
      # shellcheck disable=SC2034
      EC_SIGN_LINK=$EC_SIGN_LINK_COMM
      EC_LINK=$EC_LINK_COMM
    fi
    UPDATE_VERSION=$DASHARO_REL_VER
    if [ -v HAVE_HEADS_FW ] && [ "$DASHARO_FLAVOR" != "Dasharo (coreboot+heads)" ]; then
      print_ok "Dasharo heads firmware version is available. If you are interested,"
      print_ok "please provide your subscription credentials in the main DTS menu"
      print_ok "and select 'Update Dasharo firmware' again to check if you are eligible."
    elif [ -v HAVE_HEADS_FW ] && [ "$DASHARO_FLAVOR" == "Dasharo (coreboot+heads)" ]; then
      # Set the switch flag to offer switch back
      _can_switch_to_heads="true"
    fi
  fi

  handle_fw_switching $_can_switch_to_heads

  if [[ "$UPDATE_VERSION" == "1.1.1" && \
    ( "$BOARD_MODEL" == "PRO Z690-A WIFI DDR4(MS-7D25)" || \
      "$BOARD_MODEL" == "PRO Z690-A DDR4(MS-7D25)" || \
      "$BOARD_MODEL" == "PRO Z690-A (MS-7D25)" || \
      "$BOARD_MODEL" == "PRO Z690-A WIFI (MS-7D25)" ) ]]; then

    cpu_gen_check=$(lscpu | grep -F "Model name" | grep -E "\-(13|14)[0-9]{3}" | wc -l)

    if [ $cpu_gen_check -ne 0 ]; then
      echo "You have a 13th gen or above CPU and are trying to flash Dasharo v1.1.1 on a MSI PRO Z690-A DDR4 or DDR5 board"
      echo "That version does not support gen 13 and above CPU. Therefore we cannot continue with flashing."
      error_exit "Aborting update process..."
    fi

  fi

  while : ; do
    echo
    read -r -p "Are you sure you want to proceed with update? (Y|n) " OPTION
    echo

    case ${OPTION} in
      yes|y|Y|Yes|YES)
        break
        ;;
      n|N)
        error_exit "Aborting update process..."
        ;;
      *)
        ;;
    esac
  done

  download_artifacts
  if [ ! "$FUM" == "fum" ]; then
    display_flashing_warning
  fi
  check_flash_lock

  verify_artifacts bios

  if [ "$HAVE_EC" == "true" ]; then
    $DASHARO_ECTOOL info >> $ERR_LOG_FILE 2>&1
    error_check "Device does not have Dasharo EC firmware - cannot continue update!"
  fi

  if [ "$NEED_SMMSTORE_MIGRATION" = "true" ]; then
    smmstore_migration
  fi

  if [ "$NEED_BOOTSPLASH_MIGRATION" = "true" ]; then
    bootsplash_migration
  fi

  cbfstool "$BIOS_UPDATE_FILE" extract -r COREBOOT -n config -f "$BIOS_UPDATE_CONFIG_FILE"
  grep -q "CONFIG_VBOOT=y" "$BIOS_UPDATE_CONFIG_FILE"
  HAVE_VBOOT="$?"

  check_intel_regions
  check_blobs_in_binary $BIOS_UPDATE_FILE
  check_if_me_disabled
  set_flashrom_update_params $BIOS_UPDATE_FILE
  set_intel_regions_update_params "-N --ifd"
  check_vboot_keys

  echo "Updating Dasharo firmware..."
  print_warning "This may take several minutes. Please be patient and do not power off your computer or touch the keyboard!"

  # FLASHROM_ADD_OPT_UPDATE_OVERRIDE takes priority over auto-detected update params.
  # It set only by platform-specific and firmware version-specific conditions
  if [ -v FLASHROM_ADD_OPT_UPDATE_OVERRIDE ]; then
    # To standardize the operation of the FLASHROM_ADD_OPT_UPDATE_OVERRIDE flag,
    # by default it contains only the bios section, below we verify the
    # downloaded binary and add more sections when they were detected after
    # using the `check_blobs_in_binary` function.
    set_intel_regions_update_params "$FLASHROM_ADD_OPT_UPDATE_OVERRIDE"
    FLASHROM_ADD_OPT_UPDATE_OVERRIDE="$FLASHROM_ADD_OPT_REGIONS"
    $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} ${FLASHROM_ADD_OPT_UPDATE_OVERRIDE} -w "$BIOS_UPDATE_FILE"  >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
    error_check "Failed to update Dasharo firmware"
  else
    $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} ${FLASHROM_ADD_OPT_UPDATE} -w "$BIOS_UPDATE_FILE"  >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
    error_check "Failed to update Dasharo firmware"

    if [ $BINARY_HAS_RW_B -eq 0 ]; then
      echo "Updating second firmware partition..."
      $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} --fmap -N -i RW_SECTION_B -w "$BIOS_UPDATE_FILE"  >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
      error_check "Failed to update second firmware partition"
    fi
  fi

  # We use FLASHROM_ADD_OPT_REGIONS for updating ME and IFD.
  # If FLASHROM_ADD_OPT_REGIONS remains the same after
  # set_intel_regions_update_params or is cleared, it means
  # we either cannot update any region, or were not allowed to,
  # or platform has no descriptor.
  if [ "$FLASHROM_ADD_OPT_REGIONS" != "-N --ifd" ] && [ "$FLASHROM_ADD_OPT_REGIONS" != "" ]; then
    UPDATE_STRING=""
    grep -q "\-i fd" <<< "$FLASHROM_ADD_OPT_REGIONS"
    UPDATE_IFD=$?
    grep -q "\-i me" <<< "$FLASHROM_ADD_OPT_REGIONS"
    UPDATE_ME=$?
    if [ $UPDATE_IFD -eq 0 ]; then
      UPDATE_STRING+="Flash Descriptor"
      if [ $UPDATE_ME -eq 0 ]; then
        UPDATE_STRING+=" and "
      fi
    fi
    if [ $UPDATE_ME -eq 0 ]; then
      UPDATE_STRING+="Management Engine"
    fi
    echo "Updating $UPDATE_STRING"
    $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} ${FLASHROM_ADD_OPT_REGIONS} -w "$BIOS_UPDATE_FILE" >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
    error_check "Failed to update $UPDATE_STRING"
  fi

  if [ ! -z "$SWITCHING_TO" ]; then
    # Any post-branch-switch messaging should go here
    case "$SWITCHING_TO" in
      "uefi")
        print_ok "Successfully switched to Dasharo UEFI firmware."
        print_warning "You may need to re-create boot manager entries!"
        ;;
      "heads")
        print_ok "Successfully switched to Dasharo Heads firmware."
        print_warning "On first boot you will see a warning about unsealing TOTP secrets."
        print_warning "This is expected. Run OEM Factory Reset / Re-Ownership to finish deploying Heads."
        ;;
    esac
    read -p "Press any key to continue" # Make sure the user acknowledges.
  else
    # Regular update flow
    print_ok "Successfully updated Dasharo firmware."
  fi

  if [ "$HAVE_EC" == "true" ]; then
    echo "Updating Embedded Controller firmware. Your computer will power off automatically when done."
    update_ec # Ends in a reset, does not exit
  else
    echo -n "Syncing disks... "
    sync
    echo "Done."
    echo "The computer will reboot automatically in 5 seconds"
    sleep 0.5
    echo "Rebooting in 5s:"
    echo "5..."
    sleep 1
    echo "4..."
    sleep 1
    echo "3..."
    sleep 1
    echo "2..."
    sleep 1
    echo "1..."
    sleep 0.5
    echo "Rebooting"
    sleep 1
    send_dts_logs
    ${CMD_REBOOT}
  fi
}

restore() {
  while : ; do
    echo
    echo "Restoring firmware from HCL report."
    echo "Take note that this will only restore BIOS firmware, no EC."
    echo "Please select one of available options."

    echo "  1) Check for HCL report stored locally"
    if [ -n "${DPP_IS_LOGGED}" ]; then
      echo "  2) Check for HCL report stored on 3mdeb cloud"
    fi
    echo "  b) Back to main menu"
    echo
    read -r -p "Enter an option: " OPTION
    echo

    local network_dev=""
    local mac_addr=""
    local uuid_string=""

    # HCL report should be named as in dasharo-hcl-report so we can find
    # the package based on uuid saved in name, we need to check two options
    # with and without MAC address
    network_dev="$(ip route show default | head -1 | awk '/default/ {print $5}')"
    mac_addr="$(cat /sys/class/net/${network_dev}/address)"
    uuid_string="$(cat /sys/class/net/)"
    # if above gives error then there is no internet connection and first
    # part of uuid should be blank
    if [ ! $? -eq 0 ]; then
      uuid_string=""
    fi
    uuid_string="${mac_addr}_$(dmidecode -s system-product-name)"
    uuid_string+="_$(dmidecode -s system-manufacturer)"
    uuid="$(uuidgen -n @x500 -N $uuid_string -s)"

    case ${OPTION} in
      1)
        echo
        echo "Searching for HCL report on device..."

        HCL_REPORT_PACKAGE="$(find / -name "*$uuid*" | head -n1)"
        if [ ! -z $HCL_REPORT_PACKAGE ]; then
          tar -zxf "$HCL_REPORT_PACKAGE" -C /tmp
          echo "Restoring BIOS firmware..."
          if [ -f "/tmp/logs/rom.bin" ]; then
            print_ok "Found $HCL_REPORT_PACKAGE"
            read -p "Do you want to restore firmware from the given HCL report? [N/y] "
            case ${REPLY} in
                yes|y|Y|Yes|YES)
                  # Ideally we would like to write the entire flash when restoring,
                  # but in reality we may face locked or unaccessible regions.
                  # To be on the safe side, flash whatever can be flashed by determining
                  # what is writable.
                  check_flash_lock
                  check_intel_regions
                  check_blobs_in_binary /tmp/logs/rom.bin
                  check_if_me_disabled
                  set_intel_regions_update_params "-N --ifd -i bios"
                  $FLASHROM -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} ${FLASHROM_ADD_OPT_REGIONS} -w "/tmp/logs/rom.bin" >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
                  error_check "Failed to restore BIOS firmware! You can try one more time."
                  print_ok "Successfully restored firmware"
                  echo "Returning to main menu..."
                  exit 0
                  ;;
                *)
                  echo "Returning to main menu..."
                  exit 0
                  ;;
            esac
          else
            print_error "Report does not have firmware backup!"
          fi
        else
          print_warning "No HCL report found, cannot restore firmware"
          echo "Returning to main menu..."
          exit 0
        fi
        ;;
      2)
        echo
        echo "Searching for HCL report on cloud..."

        ${CMD_CLOUD_LIST} $uuid
        error_check "Could not download HCL report from cloud."

        HCL_REPORT_PACKAGE="$(find / -name "*$uuid*" | head -n1)"
        tar -zxf "$HCL_REPORT_PACKAGE" -C /tmp
        echo "Restoring BIOS firmware..."
        if [ -f "/tmp/logs/rom.bin" ]; then
          # Ideally we would like to write the entire flash when restoring,
          # but in reality we may face locked or unaccessible regions.
          # To be on the safe side, flash whatever can be flashed by determining
          # what is writable.
          check_flash_lock
          check_intel_regions
          check_blobs_in_binary /tmp/logs/rom.bin
          check_if_me_disabled
          set_intel_regions_update_params "-N --ifd -i bios"
          flashrom -p "$PROGRAMMER_BIOS" ${FLASH_CHIP_SELECT} ${FLASHROM_ADD_OPT_REGIONS} -w "/tmp/logs/rom.bin" >> $FLASHROM_LOG_FILE 2>> $ERR_LOG_FILE
          error_check "Failed to restore BIOS firmware! You can try one more time."
          print_ok "Successfully restored firmware"
        else
          print_error "Report does not have firmware backup!"
        fi
        ;;
      b|B)
        echo "Returning to main menu..."
        exit 0
        ;;
      *)
        ;;
    esac
  done
}

usage() {
  echo "Usage:"
  echo "  $0 install  - Install Dasharo on this device"
  echo "  $0 backup   - Backup current firmware"
  echo "  $0 restore  - Restore from a previously saved backup"
}

# for FUM we start in dasharo-deploy so we need to verify that we have internet
# connection to download shasums in board_config
if [ "$FUM" == "fum" ]; then
    wait_for_network_connection
fi

board_config
check_flash_chip
if [ -v PLATFORM_SIGN_KEY ]; then
    get_signing_keys
fi

case "$CMD" in
  install)
    if check_if_dasharo; then
      error_exit "Dasharo Firmware is already installed. This script is only for\r
        initial deployment of Dasharo Firmware. Aborting..."
    fi
    backup
    install
    ;;
  update)
    if [ "$FUM" == "fum" ]; then
        echo "Firmware Update Mode detected; proceed with automatic update in 5 seconds"
        echo "Updating in 5s:"
        echo "5..."
        sleep 1
        echo "4..."
        sleep 1
        echo "3..."
        sleep 1
        echo "2..."
        sleep 1
        echo "1..."
        sleep 0.5
    fi
    update
    ;;
  backup)
    backup
    ;;
  restore)
    if ! check_if_dasharo; then
      error_exit "Dasharo Firmware is not installed. This script is only for\r
        restoring original firmware on platforms that runs Dasharo Firmware. Aborting..."
    fi
    restore
    ;;
  *)
    usage
    ;;
esac