from __future__ import annotations

from datetime import UTC, datetime, timedelta
from typing import TYPE_CHECKING

from apscheduler.schedulers.background import BackgroundScheduler
from apscheduler.triggers.date import DateTrigger

from discord_reminder_bot.misc import calc_time, calculate, get_human_time

if TYPE_CHECKING:
    from apscheduler.job import Job


def test_calc_time() -> None:
    """Test the calc_time function with various datetime inputs."""
    test_datetime: datetime = datetime(2023, 10, 1, 12, 0, 0, tzinfo=UTC)
    expected_timestamp: str = f"<t:{int(test_datetime.timestamp())}:R>"
    assert calc_time(test_datetime) == expected_timestamp

    now: datetime = datetime.now(tz=UTC)
    expected_timestamp_now: str = f"<t:{int(now.timestamp())}:R>"
    assert calc_time(now) == expected_timestamp_now

    past_datetime: datetime = datetime(2000, 1, 1, 0, 0, 0, tzinfo=UTC)
    expected_timestamp_past: str = f"<t:{int(past_datetime.timestamp())}:R>"
    assert calc_time(past_datetime) == expected_timestamp_past

    future_datetime: datetime = datetime(2100, 1, 1, 0, 0, 0, tzinfo=UTC)
    expected_timestamp_future: str = f"<t:{int(future_datetime.timestamp())}:R>"
    assert calc_time(future_datetime) == expected_timestamp_future


def test_get_human_time() -> None:
    """Test the get_human_time function with various timedelta inputs."""
    test_timedelta = timedelta(days=1, hours=2, minutes=3, seconds=4)
    expected_output = "1d2h3m4s"
    assert get_human_time(test_timedelta) == expected_output

    test_timedelta = timedelta(hours=5, minutes=6, seconds=7)
    expected_output = "5h6m7s"
    assert get_human_time(test_timedelta) == expected_output

    test_timedelta = timedelta(minutes=8, seconds=9)
    expected_output = "8m9s"
    assert get_human_time(test_timedelta) == expected_output

    test_timedelta = timedelta(seconds=10)
    expected_output = "10s"
    assert get_human_time(test_timedelta) == expected_output

    test_timedelta = timedelta(days=0, hours=0, minutes=0, seconds=0)
    expected_output = ""
    assert get_human_time(test_timedelta) == expected_output


def test_calculate() -> None:
    """Test the calculate function with various job inputs."""
    scheduler = BackgroundScheduler()
    scheduler.start()

    # Create a job with a DateTrigger
    run_date = datetime(2270, 10, 1, 12, 0, 0, tzinfo=UTC)
    job: Job = scheduler.add_job(lambda: None, trigger=DateTrigger(run_date=run_date), id="test_job", name="Test Job")

    expected_output = "<t:9490737600:R>"
    assert calculate(job) == expected_output

    # Modify the job to have a next_run_time
    job.modify(next_run_time=run_date)
    assert calculate(job) == expected_output

    # Paused job should still return the same output
    job.pause()
    assert calculate(job) == expected_output

    scheduler.shutdown()