import datetime
from typing import Tuple, Any

import pytest
from pytz import timezone, utc

from sync_ics2gcal import CalendarConverter
from sync_ics2gcal.ical import format_datetime_utc

uid = "UID:uisgtr8tre93wewe0yr8wqy@test.com"
only_start_date = (
    uid
    + """
DTSTART;VALUE=DATE:20180215
"""
)
date_val = (
    only_start_date
    + """
DTEND;VALUE=DATE:20180217
"""
)
date_duration = (
    only_start_date
    + """
DURATION:P2D
"""
)
datetime_utc_val = (
    uid
    + """
DTSTART;VALUE=DATE-TIME:20180319T092001Z
DTEND:20180321T102501Z
"""
)
datetime_utc_duration = (
    uid
    + """
DTSTART;VALUE=DATE-TIME:20180319T092001Z
DURATION:P2DT1H5M
"""
)
created_updated = (
    date_val
    + """
CREATED:20180320T071155Z
LAST-MODIFIED:20180326T120235Z
"""
)


def ics_test_cal(content: str) -> str:
    return "BEGIN:VCALENDAR\r\n{}END:VCALENDAR\r\n".format(content)


def ics_test_event(content: str) -> str:
    return ics_test_cal("BEGIN:VEVENT\r\n{}END:VEVENT\r\n".format(content))


def test_empty_calendar() -> None:
    converter = CalendarConverter()
    converter.loads(ics_test_cal(""))
    evnts = converter.events_to_gcal()
    assert evnts == []


def test_empty_event() -> None:
    converter = CalendarConverter()
    converter.loads(ics_test_event(""))
    with pytest.raises(KeyError):
        converter.events_to_gcal()


def test_event_no_end() -> None:
    converter = CalendarConverter()
    converter.loads(ics_test_event(only_start_date))
    with pytest.raises(ValueError):
        converter.events_to_gcal()


@pytest.fixture(
    params=[
        ("date", ics_test_event(date_val), "2018-02-15", "2018-02-17"),
        ("date", ics_test_event(date_duration), "2018-02-15", "2018-02-17"),
        (
            "dateTime",
            ics_test_event(datetime_utc_val),
            "2018-03-19T09:20:01.000001Z",
            "2018-03-21T10:25:01.000001Z",
        ),
        (
            "dateTime",
            ics_test_event(datetime_utc_duration),
            "2018-03-19T09:20:01.000001Z",
            "2018-03-21T10:25:01.000001Z",
        ),
    ],
    ids=[
        "date values",
        "date duration",
        "datetime utc values",
        "datetime utc duration",
    ],
)
def param_events_start_end(request: Any) -> Any:
    return request.param


def test_event_start_end(param_events_start_end: Tuple[str, str, str, str]) -> None:
    (date_type, ics_str, start, end) = param_events_start_end
    converter = CalendarConverter()
    converter.loads(ics_str)
    events = converter.events_to_gcal()
    assert len(events) == 1
    event = events[0]
    assert event["start"] == {date_type: start}
    assert event["end"] == {date_type: end}


def test_event_created_updated() -> None:
    converter = CalendarConverter()
    converter.loads(ics_test_event(created_updated))
    events = converter.events_to_gcal()
    assert len(events) == 1
    event = events[0]
    assert event["created"] == "2018-03-20T07:11:55.000001Z"
    assert event["updated"] == "2018-03-26T12:02:35.000001Z"


@pytest.mark.parametrize(
    "value,expected_str",
    [
        (
            datetime.datetime(2022, 6, 3, 13, 52, 15, 1, utc),
            "2022-06-03T13:52:15.000001Z",
        ),
        (
            datetime.datetime(2022, 6, 3, 13, 52, 15, 1, timezone("Europe/Moscow")),
            "2022-06-03T11:22:15.000001Z",
        ),
        (datetime.date(2022, 6, 3), "2022-06-03T00:00:00.000001Z"),
    ],
    ids=["utc", "with timezone", "date"],
)
def test_format_datetime_utc(value: datetime.datetime, expected_str: str) -> None:
    assert format_datetime_utc(value) == expected_str