"""
Stolen from https://github.com/django/django/blob/master/tests/utils_tests/test_dateparse.py at
9718fa2e8abe430c3526a9278dd976443d4ae3c6

Changed to:
* use standard pytest layout
* parametrize tests
"""
from datetime import date, datetime, time, timedelta, timezone

import pytest

from pydantic import BaseModel, ValidationError, errors
from pydantic.datetime_parse import parse_date, parse_datetime, parse_duration, parse_time


def create_tz(minutes):
    return timezone(timedelta(minutes=minutes))


@pytest.mark.parametrize(
    'value,result',
    [
        # Valid inputs
        ('1494012444.883309', date(2017, 5, 5)),
        (b'1494012444.883309', date(2017, 5, 5)),
        (1_494_012_444.883_309, date(2017, 5, 5)),
        ('1494012444', date(2017, 5, 5)),
        (1_494_012_444, date(2017, 5, 5)),
        (0, date(1970, 1, 1)),
        ('2012-04-23', date(2012, 4, 23)),
        (b'2012-04-23', date(2012, 4, 23)),
        ('2012-4-9', date(2012, 4, 9)),
        (date(2012, 4, 9), date(2012, 4, 9)),
        (datetime(2012, 4, 9, 12, 15), date(2012, 4, 9)),
        # Invalid inputs
        ('x20120423', errors.DateError),
        ('2012-04-56', errors.DateError),
        (19_999_999_999, date(2603, 10, 11)),  # just before watershed
        (20_000_000_001, date(1970, 8, 20)),  # just after watershed
        (1_549_316_052, date(2019, 2, 4)),  # nowish in s
        (1_549_316_052_104, date(2019, 2, 4)),  # nowish in ms
        (1_549_316_052_104_324, date(2019, 2, 4)),  # nowish in μs
        (1_549_316_052_104_324_096, date(2019, 2, 4)),  # nowish in ns
    ],
)
def test_date_parsing(value, result):
    if result == errors.DateError:
        with pytest.raises(errors.DateError):
            parse_date(value)
    else:
        assert parse_date(value) == result


@pytest.mark.parametrize(
    'value,result',
    [
        # Valid inputs
        ('09:15:00', time(9, 15)),
        ('10:10', time(10, 10)),
        ('10:20:30.400', time(10, 20, 30, 400_000)),
        (b'10:20:30.400', time(10, 20, 30, 400_000)),
        ('4:8:16', time(4, 8, 16)),
        (time(4, 8, 16), time(4, 8, 16)),
        (3610, time(1, 0, 10)),
        (3600.5, time(1, 0, 0, 500000)),
        (86400 - 1, time(23, 59, 59)),
        ('11:05:00-05:30', time(11, 5, 0, tzinfo=create_tz(-330))),
        ('11:05:00-0530', time(11, 5, 0, tzinfo=create_tz(-330))),
        ('11:05:00Z', time(11, 5, 0, tzinfo=timezone.utc)),
        ('11:05:00+00', time(11, 5, 0, tzinfo=timezone.utc)),
        ('11:05-06', time(11, 5, 0, tzinfo=create_tz(-360))),
        ('11:05+06', time(11, 5, 0, tzinfo=create_tz(360))),
        # Invalid inputs
        (86400, errors.TimeError),
        ('xxx', errors.TimeError),
        ('091500', errors.TimeError),
        (b'091500', errors.TimeError),
        ('09:15:90', errors.TimeError),
        ('11:05:00Y', errors.TimeError),
        ('11:05:00-25:00', errors.TimeError),
    ],
)
def test_time_parsing(value, result):
    if result == errors.TimeError:
        with pytest.raises(errors.TimeError):
            parse_time(value)
    else:
        assert parse_time(value) == result


@pytest.mark.parametrize(
    'value,result',
    [
        # Valid inputs
        # values in seconds
        ('1494012444.883309', datetime(2017, 5, 5, 19, 27, 24, 883_309, tzinfo=timezone.utc)),
        (1_494_012_444.883_309, datetime(2017, 5, 5, 19, 27, 24, 883_309, tzinfo=timezone.utc)),
        ('1494012444', datetime(2017, 5, 5, 19, 27, 24, tzinfo=timezone.utc)),
        (b'1494012444', datetime(2017, 5, 5, 19, 27, 24, tzinfo=timezone.utc)),
        (1_494_012_444, datetime(2017, 5, 5, 19, 27, 24, tzinfo=timezone.utc)),
        # values in ms
        ('1494012444000.883309', datetime(2017, 5, 5, 19, 27, 24, 883, tzinfo=timezone.utc)),
        ('-1494012444000.883309', datetime(1922, 8, 29, 4, 32, 35, 999117, tzinfo=timezone.utc)),
        (1_494_012_444_000, datetime(2017, 5, 5, 19, 27, 24, tzinfo=timezone.utc)),
        ('2012-04-23T09:15:00', datetime(2012, 4, 23, 9, 15)),
        ('2012-4-9 4:8:16', datetime(2012, 4, 9, 4, 8, 16)),
        ('2012-04-23T09:15:00Z', datetime(2012, 4, 23, 9, 15, 0, 0, timezone.utc)),
        ('2012-4-9 4:8:16-0320', datetime(2012, 4, 9, 4, 8, 16, 0, create_tz(-200))),
        ('2012-04-23T10:20:30.400+02:30', datetime(2012, 4, 23, 10, 20, 30, 400_000, create_tz(150))),
        ('2012-04-23T10:20:30.400+02', datetime(2012, 4, 23, 10, 20, 30, 400_000, create_tz(120))),
        ('2012-04-23T10:20:30.400-02', datetime(2012, 4, 23, 10, 20, 30, 400_000, create_tz(-120))),
        (b'2012-04-23T10:20:30.400-02', datetime(2012, 4, 23, 10, 20, 30, 400_000, create_tz(-120))),
        (datetime(2017, 5, 5), datetime(2017, 5, 5)),
        (0, datetime(1970, 1, 1, 0, 0, 0, tzinfo=timezone.utc)),
        # Invalid inputs
        ('x20120423091500', errors.DateTimeError),
        ('2012-04-56T09:15:90', errors.DateTimeError),
        ('2012-04-23T11:05:00-25:00', errors.DateTimeError),
        (19_999_999_999, datetime(2603, 10, 11, 11, 33, 19, tzinfo=timezone.utc)),  # just before watershed
        (20_000_000_001, datetime(1970, 8, 20, 11, 33, 20, 1000, tzinfo=timezone.utc)),  # just after watershed
        (1_549_316_052, datetime(2019, 2, 4, 21, 34, 12, 0, tzinfo=timezone.utc)),  # nowish in s
        (1_549_316_052_104, datetime(2019, 2, 4, 21, 34, 12, 104_000, tzinfo=timezone.utc)),  # nowish in ms
        (1_549_316_052_104_324, datetime(2019, 2, 4, 21, 34, 12, 104_324, tzinfo=timezone.utc)),  # nowish in μs
        (1_549_316_052_104_324_096, datetime(2019, 2, 4, 21, 34, 12, 104_324, tzinfo=timezone.utc)),  # nowish in ns
    ],
)
def test_datetime_parsing(value, result):
    if result == errors.DateTimeError:
        with pytest.raises(errors.DateTimeError):
            parse_datetime(value)
    else:
        assert parse_datetime(value) == result


@pytest.mark.parametrize(
    'delta',
    [
        timedelta(days=4, minutes=15, seconds=30, milliseconds=100),  # fractions of seconds
        timedelta(hours=10, minutes=15, seconds=30),  # hours, minutes, seconds
        timedelta(days=4, minutes=15, seconds=30),  # multiple days
        timedelta(days=1, minutes=00, seconds=00),  # single day
        timedelta(days=-4, minutes=15, seconds=30),  # negative durations
        timedelta(minutes=15, seconds=30),  # minute & seconds
        timedelta(seconds=30),  # seconds
    ],
)
def test_parse_python_format(delta):
    assert parse_duration(delta) == delta
    assert parse_duration(str(delta)) == delta


@pytest.mark.parametrize(
    'value,result',
    [
        # seconds
        (timedelta(seconds=30), timedelta(seconds=30)),
        ('30', timedelta(seconds=30)),
        (30, timedelta(seconds=30)),
        (30.1, timedelta(seconds=30, milliseconds=100)),
        # minutes seconds
        ('15:30', timedelta(minutes=15, seconds=30)),
        ('5:30', timedelta(minutes=5, seconds=30)),
        # hours minutes seconds
        ('10:15:30', timedelta(hours=10, minutes=15, seconds=30)),
        ('1:15:30', timedelta(hours=1, minutes=15, seconds=30)),
        ('100:200:300', timedelta(hours=100, minutes=200, seconds=300)),
        # days
        ('4 15:30', timedelta(days=4, minutes=15, seconds=30)),
        ('4 10:15:30', timedelta(days=4, hours=10, minutes=15, seconds=30)),
        # fractions of seconds
        ('15:30.1', timedelta(minutes=15, seconds=30, milliseconds=100)),
        ('15:30.01', timedelta(minutes=15, seconds=30, milliseconds=10)),
        ('15:30.001', timedelta(minutes=15, seconds=30, milliseconds=1)),
        ('15:30.0001', timedelta(minutes=15, seconds=30, microseconds=100)),
        ('15:30.00001', timedelta(minutes=15, seconds=30, microseconds=10)),
        ('15:30.000001', timedelta(minutes=15, seconds=30, microseconds=1)),
        (b'15:30.000001', timedelta(minutes=15, seconds=30, microseconds=1)),
        # negative
        ('-4 15:30', timedelta(days=-4, minutes=15, seconds=30)),
        ('-172800', timedelta(days=-2)),
        ('-15:30', timedelta(minutes=-15, seconds=30)),
        ('-1:15:30', timedelta(hours=-1, minutes=15, seconds=30)),
        ('-30.1', timedelta(seconds=-30, milliseconds=-100)),
        # iso_8601
        ('P4Y', errors.DurationError),
        ('P4M', errors.DurationError),
        ('P4W', errors.DurationError),
        ('P4D', timedelta(days=4)),
        ('P0.5D', timedelta(hours=12)),
        ('PT5H', timedelta(hours=5)),
        ('PT5M', timedelta(minutes=5)),
        ('PT5S', timedelta(seconds=5)),
        ('PT0.000005S', timedelta(microseconds=5)),
        (b'PT0.000005S', timedelta(microseconds=5)),
    ],
)
def test_parse_durations(value, result):
    if result == errors.DurationError:
        with pytest.raises(errors.DurationError):
            parse_duration(value)
    else:
        assert parse_duration(value) == result


@pytest.mark.parametrize(
    'field, value, error_message',
    [
        ('dt', [], 'invalid type; expected datetime, string, bytes, int or float'),
        ('dt', {}, 'invalid type; expected datetime, string, bytes, int or float'),
        ('dt', object, 'invalid type; expected datetime, string, bytes, int or float'),
        ('d', [], 'invalid type; expected date, string, bytes, int or float'),
        ('d', {}, 'invalid type; expected date, string, bytes, int or float'),
        ('d', object, 'invalid type; expected date, string, bytes, int or float'),
        ('t', [], 'invalid type; expected time, string, bytes, int or float'),
        ('t', {}, 'invalid type; expected time, string, bytes, int or float'),
        ('t', object, 'invalid type; expected time, string, bytes, int or float'),
        ('td', [], 'invalid type; expected timedelta, string, bytes, int or float'),
        ('td', {}, 'invalid type; expected timedelta, string, bytes, int or float'),
        ('td', object, 'invalid type; expected timedelta, string, bytes, int or float'),
    ],
)
def test_model_type_errors(field, value, error_message):
    class Model(BaseModel):
        dt: datetime = None
        d: date = None
        t: time = None
        td: timedelta = None

    with pytest.raises(ValidationError) as exc_info:
        Model(**{field: value})
    assert len(exc_info.value.errors()) == 1
    error = exc_info.value.errors()[0]
    assert error == {'loc': (field,), 'type': 'type_error', 'msg': error_message}


@pytest.mark.parametrize('field', ['dt', 'd', 't', 'dt'])
def test_unicode_decode_error(field):
    class Model(BaseModel):
        dt: datetime = None
        d: date = None
        t: time = None
        td: timedelta = None

    with pytest.raises(ValidationError) as exc_info:
        Model(**{field: b'\x81'})
    assert len(exc_info.value.errors()) == 1
    error = exc_info.value.errors()[0]
    assert error == {
        'loc': (field,),
        'type': 'value_error.unicodedecode',
        'msg': "'utf-8' codec can't decode byte 0x81 in position 0: invalid start byte",
    }