#!/bin/sh /etc/rc.common

# SIM slot switcher for HuastLink HC-G60 or ZBT-WE2806-A
# by Konstantine Shevlakov at <shevlakov@132lan.ru> 2025
# Audited & fixed 2025

START=99
STOP=10
USE_PROCD=1

load_config_gpio(){
	local gpio value
	for c in gpio value; do
		config_get $1_$c "$1" $c
	done
}

load_config_failover(){
	local enable mode interval times_rsrp times_ping revert rsrp host
	for c in enable mode interval times_rsrp times_ping revert rsrp host; do
		config_get $1_$c "$1" $c
	done
}

reload_iface(){
	[ "$iface" ] && {
		for i in $iface; do
			ifup "$i"
		done
	}
}

_apply_modem_state(){
	echo "$sim_value"   > /sys/class/gpio/"$sim_gpio"/value
	echo "$modem_value" > /sys/class/gpio/"$modem_gpio"/value
	if [ -x /etc/init.d/smstools3 ]; then
		/etc/init.d/smstools3 restart
	fi
	sleep 30 && reload_iface &
}

start_service(){
	config_load ssw
	config_foreach load_config_gpio modem
	config_foreach load_config_gpio sim

	local modem_cur sim_cur
	modem_cur=$(cat /sys/class/gpio/"$modem_gpio"/value)
	sim_cur=$(cat /sys/class/gpio/"$sim_gpio"/value)

	iface=$(uci show network | awk -F'[.]' '/devices/{gsub("'\''",""); print $2}' | tail -1)

	if [ "$modem_value" = "$modem_cur" ] && [ "$sim_value" = "$sim_cur" ]; then
		logger -t "SIM SW" "Modem and SIM already in correct state. Nothing to do."
		return 0
	elif [ "$modem_value" = "$modem_cur" ] && [ "$modem_value" = "1" ]; then
		logger -t "SIM SW" "Modem already enabled on gpio $modem_gpio. Restart it."
		echo "0" > /sys/class/gpio/"$modem_gpio"/value
		sleep 2
		_apply_modem_state
	else
		logger -t "SIM SW" "Modem power state changed."
		_apply_modem_state
	fi

	procd_open_instance
	procd_set_param command /usr/share/ssw_track.sh
	procd_close_instance
}


reload_service(){
	start_service
}

service_triggers(){
	procd_add_reload_trigger "ssw"
}
