import unittest
import datetime
import pytz

from infi.clickhouse_orm.database import Database
from infi.clickhouse_orm.models import Model
from infi.clickhouse_orm.fields import *
from infi.clickhouse_orm.engines import *


class DateFieldsTest(unittest.TestCase):

    def setUp(self):
        self.database = Database('test-db', log_statements=True)
        if self.database.server_version < (20, 1, 2, 4):
            raise unittest.SkipTest('ClickHouse version too old')
        self.database.create_table(ModelWithDate)

    def tearDown(self):
        self.database.drop_database()

    def test_ad_hoc_model(self):
        self.database.insert([
            ModelWithDate(
                date_field='2016-08-30',
                datetime_field='2016-08-30 03:50:00',
                datetime64_field='2016-08-30 03:50:00.123456',
                datetime64_3_field='2016-08-30 03:50:00.123456'
            ),
            ModelWithDate(
                date_field='2016-08-31',
                datetime_field='2016-08-31 01:30:00',
                datetime64_field='2016-08-31 01:30:00.123456',
                datetime64_3_field='2016-08-31 01:30:00.123456')
        ])

        # toStartOfHour returns DateTime('Asia/Yekaterinburg') in my case, so I test it here to
        query = 'SELECT toStartOfHour(datetime_field) as hour_start, * from $db.modelwithdate ORDER BY date_field'
        results = list(self.database.select(query))
        self.assertEqual(len(results), 2)
        self.assertEqual(results[0].date_field, datetime.date(2016, 8, 30))
        self.assertEqual(results[0].datetime_field, datetime.datetime(2016, 8, 30, 3, 50, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[0].hour_start, datetime.datetime(2016, 8, 30, 3, 0, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[1].date_field, datetime.date(2016, 8, 31))
        self.assertEqual(results[1].datetime_field, datetime.datetime(2016, 8, 31, 1, 30, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[1].hour_start, datetime.datetime(2016, 8, 31, 1, 0, 0, tzinfo=pytz.UTC))

        self.assertEqual(results[0].datetime64_field, datetime.datetime(2016, 8, 30, 3, 50, 0, 123456, tzinfo=pytz.UTC))
        self.assertEqual(results[0].datetime64_3_field, datetime.datetime(2016, 8, 30, 3, 50, 0, 123000,
                                                                          tzinfo=pytz.UTC))
        self.assertEqual(results[1].datetime64_field, datetime.datetime(2016, 8, 31, 1, 30, 0, 123456, tzinfo=pytz.UTC))
        self.assertEqual(results[1].datetime64_3_field, datetime.datetime(2016, 8, 31, 1, 30, 0, 123000,
                                                                          tzinfo=pytz.UTC))


class ModelWithDate(Model):
    date_field = DateField()
    datetime_field = DateTimeField()
    datetime64_field = DateTime64Field()
    datetime64_3_field = DateTime64Field(precision=3)

    engine = MergeTree('date_field', ('date_field',))


class ModelWithTz(Model):
    datetime_no_tz_field = DateTimeField()  # server tz
    datetime_tz_field = DateTimeField(timezone='Europe/Madrid')
    datetime64_tz_field = DateTime64Field(timezone='Europe/Madrid')
    datetime_utc_field = DateTimeField(timezone=pytz.UTC)

    engine = MergeTree('datetime_no_tz_field', ('datetime_no_tz_field',))


class DateTimeFieldWithTzTest(unittest.TestCase):

    def setUp(self):
        self.database = Database('test-db', log_statements=True)
        if self.database.server_version < (20, 1, 2, 4):
            raise unittest.SkipTest('ClickHouse version too old')
        self.database.create_table(ModelWithTz)

    def tearDown(self):
        self.database.drop_database()

    def test_ad_hoc_model(self):
        self.database.insert([
            ModelWithTz(
                datetime_no_tz_field='2020-06-11 04:00:00',
                datetime_tz_field='2020-06-11 04:00:00',
                datetime64_tz_field='2020-06-11 04:00:00',
                datetime_utc_field='2020-06-11 04:00:00',
            ),
            ModelWithTz(
                datetime_no_tz_field='2020-06-11 07:00:00+0300',
                datetime_tz_field='2020-06-11 07:00:00+0300',
                datetime64_tz_field='2020-06-11 07:00:00+0300',
                datetime_utc_field='2020-06-11 07:00:00+0300',
            ),
        ])
        query = 'SELECT * from $db.modelwithtz ORDER BY datetime_no_tz_field'
        results = list(self.database.select(query))

        self.assertEqual(results[0].datetime_no_tz_field, datetime.datetime(2020, 6, 11, 4, 0, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[0].datetime_tz_field, datetime.datetime(2020, 6, 11, 4, 0, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[0].datetime64_tz_field, datetime.datetime(2020, 6, 11, 4, 0, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[0].datetime_utc_field, datetime.datetime(2020, 6, 11, 4, 0, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[1].datetime_no_tz_field, datetime.datetime(2020, 6, 11, 4, 0, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[1].datetime_tz_field, datetime.datetime(2020, 6, 11, 4, 0, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[1].datetime64_tz_field, datetime.datetime(2020, 6, 11, 4, 0, 0, tzinfo=pytz.UTC))
        self.assertEqual(results[1].datetime_utc_field, datetime.datetime(2020, 6, 11, 4, 0, 0, tzinfo=pytz.UTC))

        self.assertEqual(results[0].datetime_no_tz_field.tzinfo.zone, self.database.server_timezone.zone)
        self.assertEqual(results[0].datetime_tz_field.tzinfo.zone, pytz.timezone('Europe/Madrid').zone)
        self.assertEqual(results[0].datetime64_tz_field.tzinfo.zone, pytz.timezone('Europe/Madrid').zone)
        self.assertEqual(results[0].datetime_utc_field.tzinfo.zone, pytz.timezone('UTC').zone)
        self.assertEqual(results[1].datetime_no_tz_field.tzinfo.zone, self.database.server_timezone.zone)
        self.assertEqual(results[1].datetime_tz_field.tzinfo.zone, pytz.timezone('Europe/Madrid').zone)
        self.assertEqual(results[1].datetime64_tz_field.tzinfo.zone, pytz.timezone('Europe/Madrid').zone)
        self.assertEqual(results[1].datetime_utc_field.tzinfo.zone, pytz.timezone('UTC').zone)