#!/usr/bin/env python

import os
import sys

# TODO: openbmc/openbmc#2994 remove python 2 support
try:  # python 2
    import gobject
except ImportError:  # python 3
    from gi.repository import GObject as gobject
import dbus
import dbus.service
import dbus.mainloop.glib
import obmc.dbuslib.propertycacher as PropertyCacher
from obmc.dbuslib.bindings import get_dbus, DbusProperties, DbusObjectManager


INTF_NAME = "org.openbmc.InventoryItem"
DBUS_NAME = "org.openbmc.Inventory"

FRUS = {}


class Inventory(DbusProperties, DbusObjectManager):
    def __init__(self, bus, name):
        super(Inventory, self).__init__(conn=bus, object_path=name)


class InventoryItem(DbusProperties):
    def __init__(self, bus, name, data):
        super(InventoryItem, self).__init__(conn=bus, object_path=name)

        self.name = name

        if "present" not in data:
            data["present"] = "False"
        if "fault" not in data:
            data["fault"] = "False"
        if "version" not in data:
            data["version"] = ""

        self.SetMultiple(INTF_NAME, data)

        # this will load properties from cache
        PropertyCacher.load(name, INTF_NAME, self.properties)

    @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)
        PropertyCacher.save(self.name, INTF_NAME, self.properties)

    @dbus.service.method(INTF_NAME, in_signature="s", out_signature="")
    def setFault(self, fault):
        self.Set(INTF_NAME, "fault", fault)
        PropertyCacher.save(self.name, INTF_NAME, self.properties)


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]
                version = version.strip('"')
    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")
    INVENTORY_FILE = os.path.join(
        sys.prefix, "share", "inventory", "inventory.json"
    )

    if os.path.exists(INVENTORY_FILE):
        import json

        with open(INVENTORY_FILE, "r") as f:
            try:
                inv = json.load(f)
            except ValueError:
                print("Invalid JSON detected in " + INVENTORY_FILE)
            else:
                FRUS = inv
    else:
        try:
            import obmc_system_config as System

            FRUS = System.FRU_INSTANCES
        except ImportError:
            pass

    for f in list(FRUS.keys()):
        import obmc.inventory

        obj_path = f.replace("<inventory_root>", obmc.inventory.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})

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

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