import unittest
from datetime import date

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 ArrayFieldsTest(unittest.TestCase):

    def setUp(self):
        self.database = Database('test-db', log_statements=True)
        self.database.create_table(ModelWithArrays)

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

    def test_insert_and_select(self):
        instance = ModelWithArrays(
            date_field='2016-08-30',
            arr_str=['goodbye,', 'cruel', 'world', 'special chars: ,"\\\'` \n\t\\[]'],
            arr_date=['2010-01-01'],
        )
        self.database.insert([instance])
        query = 'SELECT * from $db.modelwitharrays ORDER BY date_field'
        for model_cls in (ModelWithArrays, None):
            results = list(self.database.select(query, model_cls))
            self.assertEqual(len(results), 1)
            self.assertEqual(results[0].arr_str, instance.arr_str)
            self.assertEqual(results[0].arr_int, instance.arr_int)
            self.assertEqual(results[0].arr_date, instance.arr_date)

    def test_conversion(self):
        instance = ModelWithArrays(
            arr_int=('1', '2', '3'),
            arr_date=['2010-01-01']
        )
        self.assertEqual(instance.arr_str, [])
        self.assertEqual(instance.arr_int, [1, 2, 3])
        self.assertEqual(instance.arr_date, [date(2010, 1, 1)])

    def test_assignment_error(self):
        instance = ModelWithArrays()
        for value in (7, 'x', [date.today()], ['aaa'], [None]):
            with self.assertRaises(ValueError):
                instance.arr_int = value

    def test_parse_array(self):
        from infi.clickhouse_orm.utils import parse_array, unescape
        self.assertEqual(parse_array("[]"), [])
        self.assertEqual(parse_array("[1, 2, 395, -44]"), ["1", "2", "395", "-44"])
        self.assertEqual(parse_array("['big','mouse','','!']"), ["big", "mouse", "", "!"])
        self.assertEqual(parse_array(unescape("['\\r\\n\\0\\t\\b']")), ["\r\n\0\t\b"])
        for s in ("",
                  "[",
                  "]",
                  "[1, 2",
                  "3, 4]",
                  "['aaa', 'aaa]"):
            with self.assertRaises(ValueError):
                parse_array(s)

    def test_invalid_inner_field(self):
        for x in (DateField, None, "", ArrayField(Int32Field())):
            with self.assertRaises(AssertionError):
                ArrayField(x)


class ModelWithArrays(Model):

    date_field = DateField()
    arr_str = ArrayField(StringField())
    arr_int = ArrayField(Int32Field())
    arr_date = ArrayField(DateField())

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