--[[Road Loco Storage]]--
local departures_indicator = POS(-4107, 20, -5791)
local departures_busy_indicator = POS(-4107, 20, -5795)
local TYARD_notify_indicator = POS(-4107, 20, -5789)

local notification_id = "DLG"
local print_notification = true

local function send_train()
	local cmd = { -- base RC to collect from TYARD
		"FREIGHT",
		"DLG_FREIGHT",
		"M27",
		"TYARD",
		"TY_RTS",
		"TY_COLLECT_DLG",
	}

	if F.indicator(departures_indicator) then
		--departures available, if not busy then collect departures
		if F.indicator(departures_busy_indicator) then
			-- shunter still on departures track. wait a bit and check again
			schedule_in("1;0","check_again")
			return false
		end
		--actually send train via departures track
		--departures track will disable departures_indicator
		cmd[#cmd+1] = "DLG_HS_N"
		cmd[#cmd+1] = "DLG_HS_N_AC"
		cmd[#cmd+1] = "DLG_COLLECT_DEPARTURES"
		cmd[#cmd+1] = "DLG_Departures_REV_S"
		set_rc(table.concat(cmd," "))
		atc_send("S0WRD2A1S4")
		return true
	end
	--no departures to collect, go straight to TYARD
	set_rc(table.concat(cmd," "))
	atc_send("I+S0WR;D2A1S4")
	F.indicator(TYARD_notify_indicator,false)
	return true
end

if event.schedule then
	print(rwt.to_string(rwt.now())..tostring(event.msg))
	if event.msg == "check_again" then
		if not send_train() then --will either send train or continue clock
			schedule_in("1;0","check_again")
			return
		end
	end
end

if event.ext_int then
	if event.message == "departures" or event.message == "manual" then
		if print_notification then print(rwt.to_string(rwt.now()).. " "..notification_id.." RX Notification - "..event.message) end
		if atc_id then
			send_train()
		else
			F.indicator(departures_indicator,true)
		end
		return
	end

	if event.message == "notify" then
		if print_notification then print(rwt.to_string(rwt.now()).. " "..notification_id.." RX Notification - notify") end
		if F.indicator(TYARD_notify_indicator) then return end
		if atc_id then
			send_train()
		else
			F.indicator(TYARD_notify_indicator,true)
		end
		return
	end
end

if event.train then
	if F.indicator(TYARD_notify_indicator) or F.indicator(departures_indicator) then
		print("DLG loco returned. Servicing loco before next departure")
		atc_send("B0")
		schedule_in("2;0","start_checking")
		return
	end
	atc_send("B0")
	return
end