#!/bin/sh
# Copyright (c) 2014 Stefan Huber
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following
# conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.

# Author: Stefan Huber <shuber@sthu.org>



CONFIG_FILE="/etc/smapi.conf"
SMAPI_SYSFS="/sys/devices/platform/smapi"
BATS="BAT0 BAT1"

load_config() {
	if [ -e ${CONFIG_FILE} ]; then
		source ${CONFIG_FILE}
	else
		echo "No config file /etc/smapi.conf found."
		exit 1
	fi
}

set_all() {
	local tstart=$1
	local tstop=$2
	local bat

	for bat in ${BATS}; do
		echo "  setting thresholds for ${bat}: $tstart $tstop"
		echo ${tstart} > ${SMAPI_SYSFS}/${bat}/start_charge_thresh
		echo ${tstop} > ${SMAPI_SYSFS}/${bat}/stop_charge_thresh
	done
}

set_default() {
	echo "Switching to default thesholds"
	load_config
	set_all ${BATTERY_THRESH_START} ${BATTERY_THRESH_STOP}
}

set_high() {
	echo "Switching to high thesholds"
	load_config
	set_all ${BATTERY_HIGH_THRESH_START} ${BATTERY_HIGH_THRESH_STOP}
}

set_low() {
	echo "Switching to low thesholds"
	load_config
	set_all ${BATTERY_LOW_THRESH_START} ${BATTERY_LOW_THRESH_STOP}
}

info() {
	local presence
	local tstart
	local tstop
	local bat

	for bat in ${BATS}; do
		tstart=$(cat ${SMAPI_SYSFS}/${bat}/start_charge_thresh)
		tstop=$(cat ${SMAPI_SYSFS}/${bat}/stop_charge_thresh)
		if [ "$(cat ${SMAPI_SYSFS}/${bat}/installed)" -eq "1" ]; then
			presence="  [installed]"
		fi
		echo "${bat}: ${tstart}..${tstop}${presence}"
	done
}

if [ "$#" = "0" ]; then
	info
else
	case "$1" in
		high)
			set_high
			;;
		low)
			set_low
			;;
		default)
			set_default
			;;
		*)
			info
			;;
	esac
fi