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#
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from __future__ import absolute_import, division, print_function
from copy import deepcopy

from tests.common.impala_test_suite import ImpalaTestSuite
from tests.common.test_dimensions import (
    create_client_protocol_dimension,
    create_exec_option_dimension,
    default_protocol_or_parquet_constraint,
    default_protocol_or_text_constraint,
)


class TestStringQueries(ImpalaTestSuite):

  @classmethod
  def add_test_dimensions(cls):
    super(TestStringQueries, cls).add_test_dimensions()
    cls.ImpalaTestMatrix.add_dimension(
      create_exec_option_dimension(disable_codegen_options=[False, True]))
    cls.ImpalaTestMatrix.add_constraint(lambda v:
        v.get_value('table_format').file_format in ['text', 'json']
        and v.get_value('table_format').compression_codec in ['none'])
    # Run these queries through both beeswax and HS2 to get coverage of CHAR/VARCHAR
    # returned via both protocols.
    cls.ImpalaTestMatrix.add_dimension(create_client_protocol_dimension())
    cls.ImpalaTestMatrix.add_constraint(default_protocol_or_text_constraint)

  def test_chars(self, vector):
    self.run_test_case('QueryTest/chars', vector)

  def test_chars_tmp_tables(self, vector, unique_database):
    # Tests that create temporary tables and require a unique database.
    self.run_test_case('QueryTest/chars-tmp-tables', vector, unique_database)

  # Regression tests for IMPALA-10753.
  def test_chars_values_stmt(self, vector, unique_database):
    vector = deepcopy(vector)
    vector.get_value('exec_option')['values_stmt_avoid_lossy_char_padding'] = True
    self.run_test_case('QueryTest/chars-values-stmt-no-lossy-char-padding',
        vector, unique_database)

    vector.get_value('exec_option')['values_stmt_avoid_lossy_char_padding'] = False
    self.run_test_case('QueryTest/chars-values-stmt-lossy-char-padding',
        vector, unique_database)


class TestCharFormats(ImpalaTestSuite):

  @classmethod
  def add_test_dimensions(cls):
    super(TestCharFormats, cls).add_test_dimensions()
    cls.ImpalaTestMatrix.add_dimension(
      create_exec_option_dimension(disable_codegen_options=[False, True]))
    cls.ImpalaTestMatrix.add_constraint(lambda v:
        (v.get_value('table_format').file_format in ['avro']
         and v.get_value('table_format').compression_codec in ['snap'])
        or v.get_value('table_format').file_format in ['parquet']
        or v.get_value('table_format').file_format in ['orc']
        or (v.get_value('table_format').file_format in ['text', 'json']
            and v.get_value('table_format').compression_codec in ['none']))
    # Run these queries through both beeswax and HS2 to get coverage of CHAR/VARCHAR
    # returned via both protocols.
    cls.ImpalaTestMatrix.add_dimension(create_client_protocol_dimension())
    cls.ImpalaTestMatrix.add_constraint(default_protocol_or_parquet_constraint)

  def test_char_format(self, vector):
    self.run_test_case('QueryTest/chars-formats', vector)

  def test_string_literal(self, vector):
    self.run_test_case('QueryTest/string-literals', vector)