#
#    Copyright (c) 2023 Project CHIP Authors
#    All rights reserved.
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#    Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
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#        http://www.apache.org/licenses/LICENSE-2.0
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#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.
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import queue
import time
import typing
from datetime import datetime, timedelta, timezone

import chip.clusters as Clusters
from chip.clusters.Types import NullValue
from chip.interaction_model import InteractionModelError
from chip.tlv import uint
from matter_testing_support import (MatterBaseTest, SimpleEventCallback, async_test_body, default_matter_test_main,
                                    get_wait_seconds_from_set_time, type_matches, utc_time_in_matter_epoch)
from mobly import asserts


class TC_TIMESYNC_2_11(MatterBaseTest):
    async def send_set_time_zone_cmd(self, tz: typing.List[Clusters.Objects.TimeSynchronization.Structs.TimeZoneStruct]) -> Clusters.Objects.TimeSynchronization.Commands.SetTimeZoneResponse:
        ret = await self.send_single_cmd(cmd=Clusters.Objects.TimeSynchronization.Commands.SetTimeZone(timeZone=tz), endpoint=self.endpoint)
        return ret

    async def send_set_dst_cmd(self, dst: typing.List[Clusters.Objects.TimeSynchronization.Structs.DSTOffsetStruct]) -> None:
        await self.send_single_cmd(cmd=Clusters.Objects.TimeSynchronization.Commands.SetDSTOffset(DSTOffset=dst))

    async def send_set_utc_cmd(self, utc: uint) -> None:
        await self.send_single_cmd(cmd=Clusters.Objects.TimeSynchronization.Commands.SetUTCTime(UTCTime=utc, granularity=Clusters.Objects.TimeSynchronization.Enums.GranularityEnum.kMillisecondsGranularity))

    def wait_for_dst_status(self, th_utc, wait_s, expect_active):
        timeout = get_wait_seconds_from_set_time(th_utc, wait_s)
        try:
            ret = self.q.get(block=True, timeout=timeout)
            asserts.assert_true(type_matches(received_value=ret.Data,
                                desired_type=Clusters.TimeSynchronization.Events.DSTStatus), "Unexpected event type returned")
            asserts.assert_equal(ret.Data.DSTOffsetActive, expect_active, "Unexpected value for DSTOffsetActive")
        except queue.Empty:
            asserts.fail("Did not receive DSTStatus event")
            pass

    def pics_TC_TIMESYNC_2_11(self) -> list[str]:
        return ["TIMESYNC.S.F00"]

    @async_test_body
    async def test_TC_TIMESYNC_2_11(self):

        self.endpoint = 0

        self.print_step(0, "Commissioning, already done")
        time_cluster = Clusters.Objects.TimeSynchronization
        tz_struct = time_cluster.Structs.TimeZoneStruct
        dst_struct = time_cluster.Structs.DSTOffsetStruct

        self.print_step(1, "Send SetUTCCommand")
        # It doesn't actually matter if this succeeds. The DUT is free to reject this command and use its own time.
        # If the DUT fails to get the time completely, all other tests will fail.
        try:
            await self.send_set_utc_cmd(utc_time_in_matter_epoch())
        except InteractionModelError:
            pass

        self.print_step(2, "Send SetTimeZone command")
        tz = [tz_struct(offset=7200, validAt=0)]
        ret = await self.send_set_time_zone_cmd(tz)
        asserts.assert_true(ret.DSTOffsetRequired, "DSTOffsetRequired not set to true")

        self.print_step(3, "Subscribe to DSTStatus event")
        event = time_cluster.Events.DSTStatus
        self.q = queue.Queue()
        cb = SimpleEventCallback("DSTStatus", event.cluster_id, event.event_id, self.q)
        urgent = 1
        subscription = await self.default_controller.ReadEvent(nodeid=self.dut_node_id, events=[(self.endpoint, event, urgent)], reportInterval=[1, 3])
        subscription.SetEventUpdateCallback(callback=cb)

        self.print_step(4, "TH reads the DSTOffsetListMaxSize")
        dst_list_size = await self.read_single_attribute_check_success(cluster=Clusters.TimeSynchronization, attribute=Clusters.TimeSynchronization.Attributes.DSTOffsetListMaxSize)
        asserts.assert_greater_equal(dst_list_size, 1, "Invalid dst list size")

        self.print_step(5, "TH sets two DST items if dst_list_size > 1")
        th_utc = utc_time_in_matter_epoch(datetime.now(tz=timezone.utc))
        expiry_first = utc_time_in_matter_epoch(datetime.now(tz=timezone.utc) + timedelta(seconds=10))
        dst_first = dst_struct(offset=3600, validStarting=0, validUntil=expiry_first)
        if dst_list_size > 1:
            start_second = utc_time_in_matter_epoch(datetime.now(tz=timezone.utc) + timedelta(seconds=25))
            expiry_second = utc_time_in_matter_epoch(datetime.now(tz=timezone.utc) + timedelta(seconds=40))
            dst_second = dst_struct(offset=3600, validStarting=start_second, validUntil=expiry_second)
            dst = [dst_first, dst_second]
            await self.send_set_dst_cmd(dst)

        self.print_step(6, "TH sets 1 DST item if dst_list_size == 1")
        if dst_list_size == 1:
            dst = [dst_first]
            await self.send_set_dst_cmd(dst)

        self.print_step(7, "TH reads LocalTime")
        await self.read_single_attribute_check_success(cluster=Clusters.TimeSynchronization, attribute=Clusters.TimeSynchronization.Attributes.LocalTime)

        self.print_step(8, "TH waits for DSTStatus event until th_utc + 5s")
        self.wait_for_dst_status(th_utc, 5, True)

        self.print_step(9, "If dst_list_size > 1, TH waits until th_utc + 15s")
        if dst_list_size > 1:
            time.sleep(get_wait_seconds_from_set_time(th_utc, 15))

        self.print_step(10, "If dst_list_size > 1, TH reads LocalTime")
        if dst_list_size > 1:
            await self.read_single_attribute_check_success(cluster=Clusters.TimeSynchronization, attribute=Clusters.TimeSynchronization.Attributes.LocalTime)

        self.print_step(11, "If dst_list_size > 1, TH waits for DSTStatus event until th_utc + 20s")
        if dst_list_size > 1:
            self.wait_for_dst_status(th_utc, 20, False)

        self.print_step(12, "If dst_list_size > 1, TH waits until th_utc + 30s")
        if dst_list_size > 1:
            time.sleep(get_wait_seconds_from_set_time(th_utc, 30))

        self.print_step(13, "If dst_list_size > 1, TH reads LocalTime")
        if dst_list_size > 1:
            await self.read_single_attribute_check_success(cluster=Clusters.TimeSynchronization, attribute=Clusters.TimeSynchronization.Attributes.LocalTime)

        self.print_step(14, "If dst_list_size > 1, TH waits for a DSTStatus event until th_utc + 35s")
        if dst_list_size > 1:
            self.wait_for_dst_status(th_utc, 35, True)

        self.print_step(15, "Set time zone back to 0")
        tz = [tz_struct(offset=0, validAt=0)]
        ret = await self.send_set_time_zone_cmd(tz)
        asserts.assert_true(ret.DSTOffsetRequired, "DSTOffsetRequired not set to true")

        self.print_step(16, "Set DST back to 0")
        dst = [dst_struct(offset=0, validStarting=0, validUntil=NullValue)]
        await self.send_set_dst_cmd(dst)


if __name__ == "__main__":
    default_matter_test_main()