#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2023
# Leandro Toledo de Souza <devs@python-telegram-bot.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser Public License for more details.
#
# You should have received a copy of the GNU Lesser Public License
# along with this program.  If not, see [http://www.gnu.org/licenses/].
import asyncio
import calendar
import datetime as dtm
import logging
import os
import platform
import time

import pytest

from telegram.ext import ApplicationBuilder, CallbackContext, ContextTypes, Job, JobQueue
from tests.auxil.envvars import TEST_WITH_OPT_DEPS
from tests.auxil.pytest_classes import make_bot
from tests.auxil.slots import mro_slots

if TEST_WITH_OPT_DEPS:
    import pytz

    UTC = pytz.utc
else:
    import datetime

    UTC = datetime.timezone.utc


class CustomContext(CallbackContext):
    pass


@pytest.fixture(scope="function")
async def job_queue(app):
    jq = JobQueue()
    jq.set_application(app)
    await jq.start()
    yield jq
    await jq.stop()


@pytest.mark.skipif(
    TEST_WITH_OPT_DEPS, reason="Only relevant if the optional dependency is not installed"
)
class TestNoJobQueue:
    def test_init_job_queue(self):
        with pytest.raises(RuntimeError, match=r"python-telegram-bot\[job-queue\]"):
            JobQueue()

    def test_init_job(self):
        with pytest.raises(RuntimeError, match=r"python-telegram-bot\[job-queue\]"):
            Job(None)


@pytest.mark.skipif(
    not TEST_WITH_OPT_DEPS, reason="Only relevant if the optional dependency is installed"
)
@pytest.mark.skipif(
    os.getenv("GITHUB_ACTIONS", False) and platform.system() in ["Windows", "Darwin"],
    reason="On Windows & MacOS precise timings are not accurate.",
)
@pytest.mark.flaky(10, 1)  # Timings aren't quite perfect
class TestJobQueue:
    result = 0
    job_time = 0
    received_error = None

    expected_warning = (
        "Prior to v20.0 the `days` parameter was not aligned to that of cron's weekday scheme."
        " We recommend double checking if the passed value is correct."
    )

    @pytest.fixture(autouse=True)
    def reset(self):
        self.result = 0
        self.job_time = 0
        self.received_error = None

    async def job_run_once(self, context):
        if (
            isinstance(context, CallbackContext)
            and isinstance(context.job, Job)
            and isinstance(context.update_queue, asyncio.Queue)
            and context.job.data is None
            and context.chat_data is None
            and context.user_data is None
            and isinstance(context.bot_data, dict)
        ):
            self.result += 1

    async def job_with_exception(self, context):
        raise Exception("Test Error")

    async def job_remove_self(self, context):
        self.result += 1
        context.job.schedule_removal()

    async def job_run_once_with_data(self, context):
        self.result += context.job.data

    async def job_datetime_tests(self, context):
        self.job_time = time.time()

    async def error_handler_context(self, update, context):
        self.received_error = (
            str(context.error),
            context.job,
            context.user_data,
            context.chat_data,
        )

    async def error_handler_raise_error(self, *args):
        raise Exception("Failing bigly")

    def test_slot_behaviour(self, job_queue):
        for attr in job_queue.__slots__:
            assert getattr(job_queue, attr, "err") != "err", f"got extra slot '{attr}'"
        assert len(mro_slots(job_queue)) == len(set(mro_slots(job_queue))), "duplicate slot"

    def test_application_weakref(self, bot):
        jq = JobQueue()
        application = ApplicationBuilder().token(bot.token).job_queue(None).build()
        with pytest.raises(RuntimeError, match="No application was set"):
            jq.application
        jq.set_application(application)
        assert jq.application is application
        del application
        with pytest.raises(RuntimeError, match="no longer alive"):
            jq.application

    async def test_run_once(self, job_queue):
        job_queue.run_once(self.job_run_once, 0.1)
        await asyncio.sleep(0.2)
        assert self.result == 1

    async def test_run_once_timezone(self, job_queue, timezone):
        """Test the correct handling of aware datetimes"""
        # we're parametrizing this with two different UTC offsets to exclude the possibility
        # of an xpass when the test is run in a timezone with the same UTC offset
        when = dtm.datetime.now(timezone)
        job_queue.run_once(self.job_run_once, when)
        await asyncio.sleep(0.1)
        assert self.result == 1

    async def test_job_with_data(self, job_queue):
        job_queue.run_once(self.job_run_once_with_data, 0.1, data=5)
        await asyncio.sleep(0.2)
        assert self.result == 5

    async def test_run_repeating(self, job_queue):
        job_queue.run_repeating(self.job_run_once, 0.1)
        await asyncio.sleep(0.25)
        assert self.result == 2

    async def test_run_repeating_first(self, job_queue):
        job_queue.run_repeating(self.job_run_once, 0.5, first=0.2)
        await asyncio.sleep(0.15)
        assert self.result == 0
        await asyncio.sleep(0.1)
        assert self.result == 1

    async def test_run_repeating_first_timezone(self, job_queue, timezone):
        """Test correct scheduling of job when passing a timezone-aware datetime as ``first``"""
        job_queue.run_repeating(
            self.job_run_once, 0.5, first=dtm.datetime.now(timezone) + dtm.timedelta(seconds=0.2)
        )
        await asyncio.sleep(0.05)
        assert self.result == 0
        await asyncio.sleep(0.25)
        assert self.result == 1

    async def test_run_repeating_last(self, job_queue):
        job_queue.run_repeating(self.job_run_once, 0.25, last=0.4)
        await asyncio.sleep(0.3)
        assert self.result == 1
        await asyncio.sleep(0.4)
        assert self.result == 1

    async def test_run_repeating_last_timezone(self, job_queue, timezone):
        """Test correct scheduling of job when passing a timezone-aware datetime as ``last``"""
        job_queue.run_repeating(
            self.job_run_once, 0.25, last=dtm.datetime.now(timezone) + dtm.timedelta(seconds=0.4)
        )
        await asyncio.sleep(0.3)
        assert self.result == 1
        await asyncio.sleep(0.4)
        assert self.result == 1

    async def test_run_repeating_last_before_first(self, job_queue):
        with pytest.raises(ValueError, match="'last' must not be before 'first'!"):
            job_queue.run_repeating(self.job_run_once, 0.5, first=1, last=0.5)

    async def test_run_repeating_timedelta(self, job_queue):
        job_queue.run_repeating(self.job_run_once, dtm.timedelta(seconds=0.1))
        await asyncio.sleep(0.25)
        assert self.result == 2

    async def test_run_custom(self, job_queue):
        job_queue.run_custom(self.job_run_once, {"trigger": "interval", "seconds": 0.2})
        await asyncio.sleep(0.5)
        assert self.result == 2

    async def test_multiple(self, job_queue):
        job_queue.run_once(self.job_run_once, 0.1)
        job_queue.run_once(self.job_run_once, 0.2)
        job_queue.run_repeating(self.job_run_once, 0.2)
        await asyncio.sleep(0.55)
        assert self.result == 4

    async def test_disabled(self, job_queue):
        j1 = job_queue.run_once(self.job_run_once, 0.1)
        j2 = job_queue.run_repeating(self.job_run_once, 0.5)

        j1.enabled = False
        j2.enabled = False

        await asyncio.sleep(0.6)

        assert self.result == 0

        j1.enabled = True

        await asyncio.sleep(0.6)

        assert self.result == 1

    async def test_schedule_removal(self, job_queue):
        j1 = job_queue.run_once(self.job_run_once, 0.3)
        j2 = job_queue.run_repeating(self.job_run_once, 0.2)

        await asyncio.sleep(0.25)
        assert self.result == 1

        j1.schedule_removal()
        j2.schedule_removal()

        await asyncio.sleep(0.4)

        assert self.result == 1

    async def test_schedule_removal_from_within(self, job_queue):
        job_queue.run_repeating(self.job_remove_self, 0.1)

        await asyncio.sleep(0.5)

        assert self.result == 1

    async def test_longer_first(self, job_queue):
        job_queue.run_once(self.job_run_once, 0.2)
        job_queue.run_once(self.job_run_once, 0.1)

        await asyncio.sleep(0.15)

        assert self.result == 1

    async def test_error(self, job_queue):
        job_queue.run_repeating(self.job_with_exception, 0.1)
        job_queue.run_repeating(self.job_run_once, 0.2)
        await asyncio.sleep(0.3)
        assert self.result == 1

    async def test_in_application(self, bot_info):
        app = ApplicationBuilder().bot(make_bot(bot_info)).build()
        async with app:
            assert not app.job_queue.scheduler.running
            await app.start()
            assert app.job_queue.scheduler.running

            app.job_queue.run_repeating(self.job_run_once, 0.2)
            await asyncio.sleep(0.3)
            assert self.result == 1
            await app.stop()
            assert not app.job_queue.scheduler.running
            await asyncio.sleep(1)
            assert self.result == 1

    async def test_time_unit_int(self, job_queue):
        # Testing seconds in int
        delta = 0.5
        expected_time = time.time() + delta

        job_queue.run_once(self.job_datetime_tests, delta)
        await asyncio.sleep(0.6)
        assert pytest.approx(self.job_time) == expected_time

    async def test_time_unit_dt_timedelta(self, job_queue):
        # Testing seconds, minutes and hours as datetime.timedelta object
        # This is sufficient to test that it actually works.
        interval = dtm.timedelta(seconds=0.5)
        expected_time = time.time() + interval.total_seconds()

        job_queue.run_once(self.job_datetime_tests, interval)
        await asyncio.sleep(0.6)
        assert pytest.approx(self.job_time) == expected_time

    async def test_time_unit_dt_datetime(self, job_queue):
        # Testing running at a specific datetime
        delta, now = dtm.timedelta(seconds=0.5), dtm.datetime.now(UTC)
        when = now + delta
        expected_time = when.timestamp()

        job_queue.run_once(self.job_datetime_tests, when)
        await asyncio.sleep(0.6)
        assert self.job_time == pytest.approx(expected_time)

    async def test_time_unit_dt_time_today(self, job_queue):
        # Testing running at a specific time today
        delta, now = 0.5, dtm.datetime.now(UTC)
        expected_time = now + dtm.timedelta(seconds=delta)
        when = expected_time.time()
        expected_time = expected_time.timestamp()

        job_queue.run_once(self.job_datetime_tests, when)
        await asyncio.sleep(0.6)
        assert self.job_time == pytest.approx(expected_time)

    async def test_time_unit_dt_time_tomorrow(self, job_queue):
        # Testing running at a specific time that has passed today. Since we can't wait a day, we
        # test if the job's next scheduled execution time has been calculated correctly
        delta, now = -2, dtm.datetime.now(UTC)
        when = (now + dtm.timedelta(seconds=delta)).time()
        expected_time = (now + dtm.timedelta(seconds=delta, days=1)).timestamp()

        job_queue.run_once(self.job_datetime_tests, when)
        scheduled_time = job_queue.jobs()[0].next_t.timestamp()
        assert scheduled_time == pytest.approx(expected_time)

    async def test_run_daily(self, job_queue):
        delta, now = 1, dtm.datetime.now(UTC)
        time_of_day = (now + dtm.timedelta(seconds=delta)).time()
        expected_reschedule_time = (now + dtm.timedelta(seconds=delta, days=1)).timestamp()

        job_queue.run_daily(self.job_run_once, time_of_day)
        await asyncio.sleep(delta + 0.1)
        assert self.result == 1
        scheduled_time = job_queue.jobs()[0].next_t.timestamp()
        assert scheduled_time == pytest.approx(expected_reschedule_time)

    async def test_run_daily_warning(self, job_queue, recwarn):
        delta, now = 1, dtm.datetime.now(UTC)
        time_of_day = (now + dtm.timedelta(seconds=delta)).time()

        job_queue.run_daily(self.job_run_once, time_of_day)
        assert len(recwarn) == 0
        job_queue.run_daily(self.job_run_once, time_of_day, days=(0, 1, 2, 3))
        assert len(recwarn) == 1
        assert str(recwarn[0].message) == self.expected_warning
        assert recwarn[0].filename == __file__, "wrong stacklevel"

    @pytest.mark.parametrize("weekday", (0, 1, 2, 3, 4, 5, 6))
    async def test_run_daily_days_of_week(self, job_queue, recwarn, weekday):
        delta, now = 1, dtm.datetime.now(UTC)
        time_of_day = (now + dtm.timedelta(seconds=delta)).time()
        # offset in days until next weekday
        offset = (weekday + 6 - now.weekday()) % 7
        offset = offset if offset > 0 else 7
        expected_reschedule_time = (now + dtm.timedelta(seconds=delta, days=offset)).timestamp()

        job_queue.run_daily(self.job_run_once, time_of_day, days=[weekday])
        await asyncio.sleep(delta + 0.1)
        scheduled_time = job_queue.jobs()[0].next_t.timestamp()
        assert scheduled_time == pytest.approx(expected_reschedule_time)
        assert len(recwarn) == 1
        assert str(recwarn[0].message) == self.expected_warning
        assert recwarn[0].filename == __file__, "wrong stacklevel"

    async def test_run_monthly(self, job_queue, timezone):
        delta, now = 1, dtm.datetime.now(timezone)
        expected_reschedule_time = now + dtm.timedelta(seconds=delta)
        time_of_day = expected_reschedule_time.time().replace(tzinfo=timezone)

        day = now.day
        this_months_days = calendar.monthrange(now.year, now.month)[1]
        if now.month == 12:
            next_months_days = calendar.monthrange(now.year + 1, 1)[1]
        else:
            next_months_days = calendar.monthrange(now.year, now.month + 1)[1]

        expected_reschedule_time += dtm.timedelta(this_months_days)
        if day > next_months_days:
            expected_reschedule_time += dtm.timedelta(next_months_days)

        expected_reschedule_time = timezone.normalize(expected_reschedule_time)
        # Adjust the hour for the special case that between now and next month a DST switch happens
        expected_reschedule_time += dtm.timedelta(
            hours=time_of_day.hour - expected_reschedule_time.hour
        )
        expected_reschedule_time = expected_reschedule_time.timestamp()

        job_queue.run_monthly(self.job_run_once, time_of_day, day)
        await asyncio.sleep(delta + 0.1)
        assert self.result == 1
        scheduled_time = job_queue.jobs()[0].next_t.timestamp()
        assert scheduled_time == pytest.approx(expected_reschedule_time, rel=1e-3)

    async def test_run_monthly_non_strict_day(self, job_queue, timezone):
        delta, now = 1, dtm.datetime.now(timezone)
        expected_reschedule_time = now + dtm.timedelta(seconds=delta)
        time_of_day = expected_reschedule_time.time().replace(tzinfo=timezone)

        expected_reschedule_time += dtm.timedelta(
            calendar.monthrange(now.year, now.month)[1]
        ) - dtm.timedelta(days=now.day)
        # Adjust the hour for the special case that between now & end of month a DST switch happens
        expected_reschedule_time = timezone.normalize(expected_reschedule_time)
        expected_reschedule_time += dtm.timedelta(
            hours=time_of_day.hour - expected_reschedule_time.hour
        )
        expected_reschedule_time = expected_reschedule_time.timestamp()

        job_queue.run_monthly(self.job_run_once, time_of_day, -1)
        scheduled_time = job_queue.jobs()[0].next_t.timestamp()
        assert scheduled_time == pytest.approx(expected_reschedule_time)

    async def test_default_tzinfo(self, tz_bot):
        # we're parametrizing this with two different UTC offsets to exclude the possibility
        # of an xpass when the test is run in a timezone with the same UTC offset
        app = ApplicationBuilder().bot(tz_bot).build()
        jq = app.job_queue
        await jq.start()

        when = dtm.datetime.now(tz_bot.defaults.tzinfo) + dtm.timedelta(seconds=0.1)
        jq.run_once(self.job_run_once, when.time())
        await asyncio.sleep(0.15)
        assert self.result == 1

        await jq.stop()

    async def test_get_jobs(self, job_queue):
        callback = self.job_run_once

        job1 = job_queue.run_once(callback, 10, name="name1")
        await asyncio.sleep(0.03)  # To stablize tests on windows
        job2 = job_queue.run_once(callback, 10, name="name1")
        await asyncio.sleep(0.03)
        job3 = job_queue.run_once(callback, 10, name="name2")
        await asyncio.sleep(0.03)

        assert job_queue.jobs() == (job1, job2, job3)
        assert job_queue.get_jobs_by_name("name1") == (job1, job2)
        assert job_queue.get_jobs_by_name("name2") == (job3,)

    async def test_job_run(self, app):
        job = app.job_queue.run_repeating(self.job_run_once, 0.02)
        await asyncio.sleep(0.05)  # the job queue has not started yet
        assert self.result == 0  # so the job will not run
        await job.run(app)  # but this will force it to run
        assert self.result == 1

    async def test_enable_disable_job(self, job_queue):
        job = job_queue.run_repeating(self.job_run_once, 0.2)
        await asyncio.sleep(0.5)
        assert self.result == 2
        job.enabled = False
        assert not job.enabled
        await asyncio.sleep(0.5)
        assert self.result == 2
        job.enabled = True
        assert job.enabled
        await asyncio.sleep(0.5)
        assert self.result == 4

    async def test_remove_job(self, job_queue):
        job = job_queue.run_repeating(self.job_run_once, 0.2)
        await asyncio.sleep(0.5)
        assert self.result == 2
        assert not job.removed
        job.schedule_removal()
        assert job.removed
        await asyncio.sleep(0.5)
        assert self.result == 2

    async def test_equality(self, job_queue):
        job = job_queue.run_repeating(self.job_run_once, 0.2)
        job_2 = job_queue.run_repeating(self.job_run_once, 0.2)
        job_3 = Job(self.job_run_once, 0.2)
        job_3._job = job.job
        assert job == job
        assert job != job_queue
        assert job != job_2
        assert job == job_3

        assert hash(job) == hash(job)
        assert hash(job) != hash(job_queue)
        assert hash(job) != hash(job_2)
        assert hash(job) == hash(job_3)

    async def test_process_error_context(self, job_queue, app):
        app.add_error_handler(self.error_handler_context)

        job = job_queue.run_once(self.job_with_exception, 0.1, chat_id=42, user_id=43)
        await asyncio.sleep(0.15)
        assert self.received_error[0] == "Test Error"
        assert self.received_error[1] is job
        self.received_error = None
        await job.run(app)
        assert self.received_error[0] == "Test Error"
        assert self.received_error[1] is job
        assert self.received_error[2] is app.user_data[43]
        assert self.received_error[3] is app.chat_data[42]

        # Remove handler
        app.remove_error_handler(self.error_handler_context)
        self.received_error = None

        job = job_queue.run_once(self.job_with_exception, 0.1)
        await asyncio.sleep(0.15)
        assert self.received_error is None
        await job.run(app)
        assert self.received_error is None

    async def test_process_error_that_raises_errors(self, job_queue, app, caplog):
        app.add_error_handler(self.error_handler_raise_error)

        with caplog.at_level(logging.ERROR):
            job = job_queue.run_once(self.job_with_exception, 0.1)
        await asyncio.sleep(0.15)
        assert len(caplog.records) == 1
        rec = caplog.records[-1]
        assert "An error was raised and an uncaught" in rec.getMessage()
        caplog.clear()

        with caplog.at_level(logging.ERROR):
            await job.run(app)
        assert len(caplog.records) == 1
        rec = caplog.records[-1]
        assert "uncaught error was raised while handling" in rec.getMessage()
        caplog.clear()

        # Remove handler
        app.remove_error_handler(self.error_handler_raise_error)
        self.received_error = None

        with caplog.at_level(logging.ERROR):
            job = job_queue.run_once(self.job_with_exception, 0.1)
        await asyncio.sleep(0.15)
        assert len(caplog.records) == 1
        rec = caplog.records[-1]
        assert "No error handlers are registered" in rec.getMessage()
        caplog.clear()

        with caplog.at_level(logging.ERROR):
            await job.run(app)
        assert len(caplog.records) == 1
        rec = caplog.records[-1]
        assert "No error handlers are registered" in rec.getMessage()

    async def test_custom_context(self, bot, job_queue):
        application = (
            ApplicationBuilder()
            .token(bot.token)
            .context_types(
                ContextTypes(
                    context=CustomContext, bot_data=int, user_data=float, chat_data=complex
                )
            )
            .build()
        )
        job_queue.set_application(application)

        async def callback(context):
            self.result = (
                type(context),
                context.user_data,
                context.chat_data,
                type(context.bot_data),
            )

        job_queue.run_once(callback, 0.1)
        await asyncio.sleep(0.15)
        assert self.result == (CustomContext, None, None, int)

    async def test_attribute_error(self):
        job = Job(self.job_run_once)
        with pytest.raises(
            AttributeError, match="nor 'apscheduler.job.Job' has attribute 'error'"
        ):
            job.error

    @pytest.mark.parametrize("wait", (True, False))
    async def test_wait_on_shut_down(self, job_queue, wait):
        ready_event = asyncio.Event()

        async def callback(_):
            await ready_event.wait()

        await job_queue.start()
        job_queue.run_once(callback, when=0.1)
        await asyncio.sleep(0.15)

        task = asyncio.create_task(job_queue.stop(wait=wait))
        if wait:
            assert not task.done()
            ready_event.set()
            await asyncio.sleep(0.1)  # no CancelledError (see source of JobQueue.stop for details)
            assert task.done()
        else:
            await asyncio.sleep(0.1)  # unfortunately we will get a CancelledError here
            assert task.done()