#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2022
# 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
import pytz
from flaky import flaky

from telegram.ext import ApplicationBuilder, CallbackContext, ContextTypes, Job, JobQueue


class CustomContext(CallbackContext):
    pass


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


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

    @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)

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

    def test_slot_behaviour(self, job_queue, mro_slots):
        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(0.15)
        assert self.result == 0
        await asyncio.sleep(0.2)
        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 ``first``"""
        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)

        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):
        app = ApplicationBuilder().token(bot.token).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(pytz.utc)
        when = now + delta
        expected_time = (now + delta).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(pytz.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(pytz.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, recwarn):
        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."
        )
        delta, now = 1, dtm.datetime.now(pytz.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)
        assert len(recwarn) == 1
        assert str(recwarn[0].message) == 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):
        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."
        )
        delta, now = 1, dtm.datetime.now(pytz.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) == 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")
        job2 = job_queue.run_once(callback, 10, name="name1")
        job3 = job_queue.run_once(callback, 10, name="name2")

        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)
        assert self.result == 0
        await job.run(app)
        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_job_lt_eq(self, job_queue):
        job = job_queue.run_repeating(self.job_run_once, 0.2)
        assert not job == job_queue
        assert not job < job

    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)
        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

        # 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)

        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)
            assert task.done()
        else:
            await asyncio.sleep(0.1)
            assert task.done()
