#!/bin/bash
# Shell functions for common operations using fbwhiptail
. /etc/functions

# Pause for the configured timeout before booting automatically.  Returns 0 to
# continue with automatic boot, nonzero if user interrupted.
pause_automatic_boot()
{
	if IFS= read -t "$CONFIG_AUTO_BOOT_TIMEOUT" -s -n 1 -p \
		"Automatic boot in $CONFIG_AUTO_BOOT_TIMEOUT seconds unless interrupted by keypress... "; then
		return 1 # Interrupt automatic boot
	fi
	return 0 # Continue with automatic boot
}

mount_usb()
{
  TRACE "under gui_functions:mount_usb"
  # Unmount any previous USB device
  if grep -q /media /proc/mounts ; then
    umount /media || die "Unable to unmount /media"
  fi
  # Mount the USB boot device
  mount-usb && USB_FAILED=0 || ( [ $? -eq 5 ] && exit 1 || USB_FAILED=1 )
  if [ $USB_FAILED -ne 0 ]; then
    whiptail $BG_COLOR_ERROR --title 'USB Drive Missing' \
      --msgbox "Insert your USB drive and press Enter to continue." 16 60
    mount-usb && USB_FAILED=0 || ( [ $? -eq 5 ] && exit 1 || USB_FAILED=1 )
    if [ $USB_FAILED -ne 0 ]; then
      whiptail $BG_COLOR_ERROR --title 'ERROR: Mounting /media Failed' \
        --msgbox "Unable to mount USB device" 16 60
      exit 1
    fi
  fi
}

file_selector()
{
  TRACE "under gui_functions:file_selector"
  FILE=""
  FILE_LIST=$1
  MENU_MSG=${2:-"Choose the file"}
  MENU_TITLE=${3:-"Select your File"}

  # create file menu options
  if [ `cat "$FILE_LIST" | wc -l` -gt 0 ]; then
    option=""
    while [ -z "$option" ]
    do
      MENU_OPTIONS=""
      n=0
      while read option
      do
        n=`expr $n + 1`
        option=$(echo $option | tr " " "_")
        MENU_OPTIONS="$MENU_OPTIONS $n ${option}"
      done < $FILE_LIST

      MENU_OPTIONS="$MENU_OPTIONS a Abort"
      whiptail --title "${MENU_TITLE}" \
        --menu "${MENU_MSG} [1-$n, a to abort]:" 20 120 8 \
        -- $MENU_OPTIONS \
        2>/tmp/whiptail || die "Aborting"

      option_index=$(cat /tmp/whiptail)

      if [ "$option_index" = "a" ]; then
        option="a"
        return
      fi

      option=`head -n $option_index $FILE_LIST | tail -1`
      if [ "$option" == "a" ]; then
        return
      fi
    done
    if [ -n "$option" ]; then
      FILE=$option
    fi
  else
    whiptail $BG_COLOR_ERROR --title 'ERROR: No Files Found' \
      --msgbox "No Files found matching the pattern. Aborting." 16 60
    exit 1
  fi
}

show_system_info()
{
  TRACE "Under /bin/gui-init:show_system_info"
  battery_charge="$(print_battery_charge)"
  battery_health="$(print_battery_health)"
  if [ -n $battery_charge -a -n $battery_health ];then
	  battery_status="\nBattery charge: $battery_charge%\nBattery health: $battery_health%\n"
  fi

  memtotal=$(cat /proc/meminfo | grep 'MemTotal' | tr -s ' ' | cut -f2 -d ' ')
  memtotal=$((${memtotal} / 1024 / 1024 + 1))
  cpustr=$(cat /proc/cpuinfo | grep 'model name' | uniq | sed -r 's/\(R\)//;s/\(TM\)//;s/CPU //;s/model name.*: //')
  kernel=$(uname -s -r)

  whiptail $BG_COLOR_MAIN_MENU --title 'System Info' \
    --msgbox "${BOARD_NAME}\n\nFW_VER: ${FW_VER}\nKernel: ${kernel}\n\nCPU: ${cpustr}\nRAM: ${memtotal} GB\n$battery_status\n$(fdisk -l | grep -e '/dev/sd.:' -e '/dev/nvme.*:' | sed 's/B,.*/B/')" 16 60
}

# Get "Enable" or "Disable" to display in the configuration menu, based on a
# setting value
get_config_display_action()
{
  [ "$1" = "y" ] && echo "Disable" || echo "Enable"
}

# Invert a config value
invert_config()
{
  [ "$1" = "y" ] && echo "n" || echo "y"
}

# Get "Enable" or "Disable" for a config that internally is inverted (because it
# disables a behavior that is on by default).
get_inverted_config_display_action()
{
  get_config_display_action "$(invert_config "$1")"
}