# Copyright (c) 2017 ARM Limited
# All rights reserved.
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder.  You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
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# modified or unmodified, in source code or in binary form.
#
# Copyright (c) 2006 The Regents of The University of Michigan
# Copyright (c) 2013 Advanced Micro Devices, Inc.
# Copyright (c) 2013 Mark D. Hill and David A. Wood
# All rights reserved.
#
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# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
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# neither the name of the copyright holders nor the names of its
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import m5

import _m5.event
from _m5.event import GlobalSimLoopExitEvent as SimExit
from _m5.event import PyEvent as Event
from _m5.event import (
    getEventQueue,
    setEventQueue,
)

mainq = None


class EventWrapper(Event):
    """Helper class to wrap callable objects in an Event base class"""

    def __init__(self, func, **kwargs):
        super().__init__(**kwargs)

        if not callable(func):
            raise RuntimeError(
                f"Can't wrap '{str(func)}', object is not callable"
            )

        self._func = func

    def __call__(self):
        self._func()

    def __str__(self):
        return f"EventWrapper({str(self._func)})"


class ProgressEvent(Event):
    def __init__(self, eventq, period):
        super().__init__()
        self.period = int(period)
        self.eventq = eventq
        self.eventq.schedule(self, m5.curTick() + self.period)

    def __call__(self):
        print(f"Progress! Time now {m5.curTick() / 1000000000000.0:f}s")
        self.eventq.schedule(self, m5.curTick() + self.period)


def create(func, priority=Event.Default_Pri):
    """Create an Event from a function"""

    return EventWrapper(func, priority=priority)


__all__ = [
    "Event",
    "EventWrapper",
    "ProgressEvent",
    "SimExit",
    "mainq",
    "create",
]