#!/bin/sh

. /etc/init.d/globals

LSUSB=$(lsusb)

# supported dpf-devices
DPF="1908:0102"
DPFbootloader="1908:3318"
#
DPF="${DPF} ${DPFbootloader}"

# supported spf-devices
SPFstorage="04E8:200A 04E8:200E 04E8:200C 04E8:2012 04E8:2016 04E8:2025 04E8:2033 04E8:201C 04E8:2027 04E8:2035 04E8:204F 04E8:2039"
SPFmonitor="04E8:200B 04E8:200F 04E8:200D 04E8:2013 04E8:2017 04E8:2026 04E8:2034 04E8:201B 04E8:2028 04E8:2036 04E8:2050 04E8:2040"
# SPFmodel: ^SPF-72H  ^SPF-75H  ^SPF-83H  ^SPF-85H  ^SPF-85P  ^SPF-87H  ^SPF-87H  ^SPF-105P ^SPF-107H ^SPF-107H ^SPF-700T ^SPF-1000P
# SPFmodel:           ^SPF-76H            ^SPF-86H  ^SPF-86P   old                                     new
SPF="${SPFstorage} ${SPFmonitor}"

DEVICES="${DPF} ${SPF}"
for DEVICE in ${DEVICES}; do
	V=$(echo ${DEVICE:0:4} | sed 's/^[0]*//' | tr [:upper:] [:lower:]) # lower case vendor  w/o leading zeros
	P=$(echo ${DEVICE:5:4} | sed 's/^[0]*//' | tr [:upper:] [:lower:]) # lower case product w/o leading zeros

	flagLCD=/tmp/.lcd-${V}

	case "$1" in
		start|add)
			# LOGINFO "trying to process ${DEVICE} (V:{$V} P:{$P})"

			echo "${LSUSB}" | grep -q -i "${DEVICE}" || continue

			if $(echo "${LSUSB}" | grep -q "${DPFbootloader}"); then
				LOGINFO "unsupported device (ID ${DEVICE}) found"
				LOGINFO "${DEVICE} is in bootloader mode"
				break
			fi

			LOGINFO "supported device (ID ${DEVICE}) found"

			if $(echo "${DPF} ${SPF}" | grep -q "${DEVICE}"); then
				LOGINFO "creating flagfile '$flagLCD'"
				echo "${DEVICE}" > $flagLCD

				if $(echo "${DPF} ${SPFstorage}" | grep -q "${DEVICE}"); then
					LOGINFO "DPF or SPF in storage mode found"
					LOGINFO "(re)starting lcd4linux"

					service lcd4linux restart
				fi

				if $(echo "${SPFmonitor}" | grep -q "${DEVICE}"); then
					LOGINFO "SPF in monitor mode found"
					if [ -e /tmp/lcd4linux.pid ]; then
						LOGINFO "do nothing"
					else
						LOGINFO "(re)starting lcd4linux"
						service lcd4linux restart
					fi
				fi
				break
			fi
		;;
		stop|remove)
			if [ -e $flagLCD ]; then
				grep "^${DEVICE}" $flagLCD >/dev/null || continue

				LOGINFO "supported DPF/SPF (ID ${DEVICE}) removed"

				if $(echo "${DPF} ${SPFmonitor}" | grep -q "${DEVICE}"); then
					LOGINFO "DPF or SPF in monitor mode removed"
					LOGINFO "stopping lcd4linux"

					service lcd4linux stop
				fi

				if $(echo "${SPFstorage}" | grep -q "${DEVICE}"); then
					LOGINFO "SPF in storage mode removed"
					LOGINFO "do nothing"
				fi

				LOGINFO "removing flagfile '$flagLCD'"
				rm -f $flagLCD
				break
			fi
		;;
		*)
			echo "[${BASENAME}] Usage: $0 {start|stop}"
		;;
	esac
done