#!/usr/bin/env python

"""
This application presents a 'console' prompt to the user asking for readrange commands
which create ReadRangeRequest PDUs, then lines up the coorresponding ReadRangeACK
and prints the value.
"""

import sys

from bacpypes.debugging import bacpypes_debugging, ModuleLogger
from bacpypes.consolelogging import ConfigArgumentParser
from bacpypes.consolecmd import ConsoleCmd

from bacpypes.core import run, enable_sleeping
from bacpypes.iocb import IOCB

from bacpypes.pdu import Address
from bacpypes.object import get_datatype
from bacpypes.apdu import ReadRangeRequest, ReadRangeACK

from bacpypes.app import BIPSimpleApplication
from bacpypes.primitivedata import ObjectIdentifier
from bacpypes.local.device import LocalDeviceObject

# some debugging
_debug = 0
_log = ModuleLogger(globals())

# globals
this_application = None

#
#   ReadRangeConsoleCmd
#

@bacpypes_debugging
class ReadRangeConsoleCmd(ConsoleCmd):

    def do_readrange(self, args):
        """readrange <addr> <objid> <prop> [ <indx> ]"""
        args = args.split()
        if _debug: ReadRangeConsoleCmd._debug("do_readrange %r", args)

        try:
            addr, obj_id, prop_id = args[:3]
            obj_id = ObjectIdentifier(obj_id).value

            datatype = get_datatype(obj_id[0], prop_id)
            if not datatype:
                raise ValueError("invalid property for object type")

            # build a request
            request = ReadRangeRequest(
                objectIdentifier=obj_id,
                propertyIdentifier=prop_id,
                )
            request.pduDestination = Address(addr)

            if len(args) == 4:
                request.propertyArrayIndex = int(args[3])
            if _debug: ReadRangeConsoleCmd._debug("    - request: %r", request)

            # make an IOCB
            iocb = IOCB(request)
            if _debug: ReadRangeConsoleCmd._debug("    - iocb: %r", iocb)

            # give it to the application
            this_application.request_io(iocb)

            # wait for it to complete
            iocb.wait()

            # do something for success
            if iocb.ioResponse:
                apdu = iocb.ioResponse

                # should be an ack
                if not isinstance(apdu, ReadRangeACK):
                    if _debug: ReadRangeConsoleCmd._debug("    - not an ack")
                    return

                # find the datatype
                datatype = get_datatype(apdu.objectIdentifier[0], apdu.propertyIdentifier)
                if _debug: ReadRangeConsoleCmd._debug("    - datatype: %r", datatype)
                if not datatype:
                    raise TypeError("unknown datatype")

                # cast out the data into a list
                value = apdu.itemData[0].cast_out(datatype)

                # dump it out
                for i, item in enumerate(value):
                    sys.stdout.write("[%d]\n" % (i,))
                    item.debug_contents(file=sys.stdout, indent=2)
                sys.stdout.flush()

            # do something for error/reject/abort
            if iocb.ioError:
                sys.stdout.write(str(iocb.ioError) + '\n')

        except Exception as error:
            ReadRangeConsoleCmd._exception("exception: %r", error)

#
#   __main__
#

def main():
    global this_application

    # parse the command line arguments
    args = ConfigArgumentParser(description=__doc__).parse_args()

    if _debug: _log.debug("initialization")
    if _debug: _log.debug("    - args: %r", args)

    # make a device object
    this_device = LocalDeviceObject(ini=args.ini)
    if _debug: _log.debug("    - this_device: %r", this_device)

    # make a simple application
    this_application = BIPSimpleApplication(this_device, args.ini.address)

    # make a console
    this_console = ReadRangeConsoleCmd()
    if _debug: _log.debug("    - this_console: %r", this_console)

    # enable sleeping will help with threads
    enable_sleeping()

    _log.debug("running")

    run()

    _log.debug("fini")

if __name__ == "__main__":
    main()