#!/bin/bash

#=================================================
# COMMON VARIABLES
#=================================================

pkg_dependencies="sipcalc hostapd iw kmod"
nonfree_firmware_packages="firmware-atheros firmware-realtek firmware-ralink firmware-libertas atmel-firmware firmware-zd1211"
free_firmware_packages="firmware-ath9k-htc"

#=================================================
# PERSONAL HELPERS
#=================================================

function other_hotspot_apps()
{
  local app_shortname="${app%%__*}"
  local hotspot_apps=$(yunohost app list --output-as json | jq -r .apps[].id | grep -F $app_shortname)
  # Remove this app from hotspot apps list
  grep -F -x -v $app <<< ${hotspot_apps}
}

function iw_devices()
{
  /sbin/iw dev | grep Interface | grep -v 'mon\.' | grep -v hotspot | awk '{ print $NF }'
}

function used_iw_devices()
{
  for hotspot_app in $(other_hotspot_apps); do
    hotspot_wifi_device=$(ynh_app_setting_get --app=$hotspot_app --key=wifi_device)
    if [[ -n "${hotspot_wifi_device}" ]]; then
      echo "${hotspot_wifi_device}"
    fi
  done
}

function unused_iw_devices()
{
  # Only prints devices that are not in the list of used devices
  iw_devices | grep -F -v -f <(used_iw_devices)
}

function check_armbian_nonfree_conflict()
{

  # If we're on armbian, force $firmware_nonfree
  # because armbian-firmware conflicts with firmware-misc-nonfree package
  if dpkg --list | grep -q armbian-firmware; then
    echo "You are running Armbian and firmware-misc-nonfree are known to conflict with armbian-firwmare. " >&2
    echo "The package firmware-misc-nonfree is a dependency of firmware-ralink, so firmware-ralink will NOT be installed" >&2
    echo "You can manually install firmware-ralink with 'apt -o Dpkg::Options::=\"--force-overwrite\" firmware-ralink'" >&2
    nonfree_firmware_packages=$(echo $nonfree_firmware_packages | sed 's/ firmware-ralink//')
  fi

}


function hot_reload_usb_wifi_cards()
{
  modulesList="acx-mac80211 ar5523 ar9170usb at76c50x-usb at76_usb ath9k_htc carl9170 orinoco_usb p54usb prism2_usb r8712u r8192s_usb r8192u_usb rndis_wlan rt2500usb rt2800usb rt2870sta rt73usb rtl8187 rtl8192cu usb8xxx vt6656_stage zd1201 zd1211rw"
  modprobe --quiet --remove $modulesList || true
  possibleUsbDevicesNeedingReload=$(dmesg | grep -Pio '(?<=usb )[0-9-]+(?=:.*firmware)' | sort | uniq)
  for usbPath in $possibleUsbDevicesNeedingReload; do
    if [[ -f "/sys/bus/usb/devices/$usbPath/authorized" ]]; then
      echo "Try to reload driver for usb $usbPath" >&2
      echo 0 > /sys/bus/usb/devices/$usbPath/authorized
      echo 1 > /sys/bus/usb/devices/$usbPath/authorized
      # Wait for driver reloading
      sleep 2
    fi
  done
}

function configure_hostapd()
{
  if [[ "${wifi_secure}" -eq 1 ]]; then
		sec_comment=""
	else
		sec_comment="#"
	fi

	ynh_add_config --template="/etc/hostapd/$app/hostapd.conf.tpl" --destination="/etc/hostapd/$app/hostapd.conf"
}

function configure_dnsmasq()
{
  ynh_add_config --template="/etc/dnsmasq.$app/dnsmasq.conf.tpl" --destination="/etc/dnsmasq.d/$app.conf"
  systemctl restart dnsmasq
}

function configure_dhcp()
{
  ynh_add_config --template="/etc/dnsmasq.$app/dhcpdv4.conf.tpl" --destination="/etc/dnsmasq.$app/dhcpdv4.conf"

	if [[ -n "${ip6_net}" ]] && [[ "${ip6_net}" != "none" ]]; then
		ynh_add_config --template="/etc/dnsmasq.$app/dhcpdv6.conf.tpl" --destination="/etc/dnsmasq.$app/dhcpdv6.conf"
	fi  
}

#=================================================
# EXPERIMENTAL HELPERS
#=================================================

#=================================================
# FUTURE OFFICIAL HELPERS
#=================================================