#!/usr/bin/python -u

import os
import sys
import gobject
import dbus
import dbus.service
import dbus.mainloop.glib
import cPickle
import json
import obmc.dbuslib.propertycacher as PropertyCacher
from obmc.dbuslib.bindings import get_dbus, DbusProperties, DbusObjectManager

if (len(sys.argv) < 2):
	print "Usage:  inventory_items.py [system name]"
	exit(1)
System = __import__(sys.argv[1])


INTF_NAME = 'org.openbmc.InventoryItem'
DBUS_NAME = 'org.openbmc.Inventory'
FRUS = System.FRU_INSTANCES

class Inventory(DbusProperties,DbusObjectManager):
	def __init__(self,bus,name):
		DbusProperties.__init__(self)
		DbusObjectManager.__init__(self)
		dbus.service.Object.__init__(self,bus,name)
		self.InterfacesAdded(name,self.properties)


class InventoryItem(DbusProperties):
	def __init__(self,bus,name,data):		
		DbusProperties.__init__(self)
		dbus.service.Object.__init__(self,bus,name)

		self.name = name
		
		## this will load properties from cache
		if (data.has_key('present') == False):
			data['present'] = 'False'
		if (data.has_key('fault') == False):
			data['fault'] = 'False'
		if (data.has_key('version') == False):
			data['version'] = ''

		self.SetMultiple(INTF_NAME,data)
		
		
	@dbus.service.method(INTF_NAME,
		in_signature='a{sv}', out_signature='')
	def update(self,data):
		self.SetMultiple(INTF_NAME,data)
		PropertyCacher.save(self.name,INTF_NAME,self.properties)

	@dbus.service.method(INTF_NAME,
		in_signature='s', out_signature='')
	def setPresent(self,present):
		self.Set(INTF_NAME,'present',present)

	@dbus.service.method(INTF_NAME,
		in_signature='s', out_signature='')
	def setFault(self,fault):
		self.Set(INTF_NAME,'fault',fault)


def getVersion():
	version = "Error"
	with open('/etc/os-release', 'r') as f:
		for line in f:
			p = line.rstrip('\n')
			parts = line.rstrip('\n').split('=')
			if (parts[0] == "VERSION_ID"):
				version = parts[1]
	return version


if __name__ == '__main__':
    dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
    bus = get_dbus()
    mainloop = gobject.MainLoop()
    obj_parent = Inventory(bus, '/org/openbmc/inventory')

    for f in FRUS.keys():
	obj_path=f.replace("<inventory_root>",System.INVENTORY_ROOT)
    	obj = InventoryItem(bus,obj_path,FRUS[f])
	obj_parent.add(obj_path,obj)

    	## TODO:  this is a hack to update bmc inventory item with version
    	## should be done by flash object
	if (FRUS[f]['fru_type'] == "BMC"):
		version = getVersion()
		obj.update({'version': version})

    name = dbus.service.BusName(DBUS_NAME,bus)
    print "Running Inventory Manager"
    mainloop.run()