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from __future__ import absolute_import, division, print_function
import pytest
from tests.common.custom_cluster_test_suite import CustomClusterTestSuite


class TestStatestoreRpcErrors(CustomClusterTestSuite):
  """Tests for statestore RPC handling."""

  @classmethod
  def setup_class(cls):
    if cls.exploration_strategy() != 'exhaustive':
      pytest.skip('runs only in exhaustive')
    super(TestStatestoreRpcErrors, cls).setup_class()

  @pytest.mark.execute_serially
  @CustomClusterTestSuite.with_args(
      " --debug_actions=REGISTER_SUBSCRIBER_FIRST_ATTEMPT:FAIL@1.0")
  def test_register_subscriber_rpc_error(self):
    self.assert_impalad_log_contains("INFO",
        "Injected RPC error.*Debug Action: REGISTER_SUBSCRIBER_FIRST_ATTEMPT")

    # Ensure cluster has started up by running a query.
    result = self.execute_query("select count(*) from functional_parquet.alltypes")
    assert result.success, str(result)

  @pytest.mark.execute_serially
  @CustomClusterTestSuite.with_args(
      impalad_args=" --debug_actions=GET_PROTOCOL_VERSION_FIRST_ATTEMPT:FAIL@1.0",
      disable_log_buffering=True)
  def test_get_protocol_version_rpc_error(self):
    self.assert_impalad_log_contains("INFO",
        "Injected RPC error.*Debug Action: GET_PROTOCOL_VERSION_FIRST_ATTEMPT")

    # Ensure cluster has started up by running a query.
    result = self.execute_query("select count(*) from functional_parquet.alltypes")
    assert result.success, str(result)


class TestCatalogRpcErrors(CustomClusterTestSuite):
  """Tests for catalog RPC handling."""

  @classmethod
  def setup_class(cls):
    if cls.exploration_strategy() != 'exhaustive':
      pytest.skip('runs only in exhaustive')
    super(TestCatalogRpcErrors, cls).setup_class()

  @pytest.mark.execute_serially
  @CustomClusterTestSuite.with_args(
      impalad_args=" --debug_actions=CATALOG_RPC_FIRST_ATTEMPT:FAIL@1.0",
      disable_log_buffering=True)
  def test_register_subscriber_rpc_error(self, unique_database):
    """Validate that RPCs to the catalogd are retried by injecting a failure into the
    first RPC attempt for any catalogd RPC. Run a variety of queries that require
    catalogd interaction to ensure all RPCs are retried."""
    log_pattern = "{0}.*Injected RPC error.*Debug Action: CATALOG_RPC_FIRST_ATTEMPT"
    # Validate create table queries.
    result = self.execute_query("create table {0}.tmp (col int)".format(unique_database))
    assert result.success
    self.assert_impalad_log_contains("INFO", log_pattern.format(result.query_id), -1)

    # Validate insert queries.
    result = self.execute_query("insert into table {0}.tmp values (1)"
        .format(unique_database))
    assert result.success
    self.assert_impalad_log_contains("INFO", log_pattern.format(result.query_id), -1)

    # Validate compute stats queries.
    result = self.execute_query("compute stats {0}.tmp".format(unique_database))
    assert result.success
    self.assert_impalad_log_contains("INFO", log_pattern.format(result.query_id), -1)

    # Validate refresh table queries.
    result = self.execute_query("refresh {0}.tmp".format(unique_database))
    assert result.success
    self.assert_impalad_log_contains("INFO", log_pattern.format(result.query_id), -1)

    # Validate drop table queries.
    result = self.execute_query("drop table {0}.tmp".format(unique_database))
    assert result.success
    self.assert_impalad_log_contains("INFO", log_pattern.format(result.query_id), -1)

    # Validate select queries against pre-existing, but not-loaded tables.
    result = self.execute_query("select count(*) from functional_parquet.alltypes")
    assert result.success, str(result)
    self.assert_impalad_log_contains("INFO", log_pattern.format(result.query_id), -1)