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import json
from typing import Any, Dict
from unittest import mock
from unittest.mock import Mock, patch

import pandas as pd
import pytest
from sqlalchemy import types

import superset.config
from superset.constants import USER_AGENT
from superset.db_engine_specs.trino import TrinoEngineSpec
from superset.utils.core import GenericDataType
from tests.integration_tests.db_engine_specs.base_tests import TestDbEngineSpec


class TestTrinoDbEngineSpec(TestDbEngineSpec):
    def test_get_extra_params(self):
        database = Mock()

        database.extra = json.dumps({})
        database.server_cert = None
        extra = TrinoEngineSpec.get_extra_params(database)
        expected = {"engine_params": {"connect_args": {"source": USER_AGENT}}}
        self.assertEqual(extra, expected)

        expected = {
            "first": 1,
            "engine_params": {
                "second": "two",
                "connect_args": {"source": "foobar", "third": "three"},
            },
        }
        database.extra = json.dumps(expected)
        database.server_cert = None
        extra = TrinoEngineSpec.get_extra_params(database)
        self.assertEqual(extra, expected)

    @patch("superset.utils.core.create_ssl_cert_file")
    def test_get_extra_params_with_server_cert(self, create_ssl_cert_file_func: Mock):
        database = Mock()

        database.extra = json.dumps({})
        database.server_cert = "TEST_CERT"
        create_ssl_cert_file_func.return_value = "/path/to/tls.crt"
        extra = TrinoEngineSpec.get_extra_params(database)

        connect_args = extra.get("engine_params", {}).get("connect_args", {})
        self.assertEqual(connect_args.get("http_scheme"), "https")
        self.assertEqual(connect_args.get("verify"), "/path/to/tls.crt")
        create_ssl_cert_file_func.assert_called_once_with(database.server_cert)

    @patch("trino.auth.BasicAuthentication")
    def test_auth_basic(self, auth: Mock):
        database = Mock()

        auth_params = {"username": "username", "password": "password"}
        database.encrypted_extra = json.dumps(
            {"auth_method": "basic", "auth_params": auth_params}
        )

        params: Dict[str, Any] = {}
        TrinoEngineSpec.update_params_from_encrypted_extra(database, params)
        connect_args = params.setdefault("connect_args", {})
        self.assertEqual(connect_args.get("http_scheme"), "https")
        auth.assert_called_once_with(**auth_params)

    @patch("trino.auth.KerberosAuthentication")
    def test_auth_kerberos(self, auth: Mock):
        database = Mock()

        auth_params = {
            "service_name": "superset",
            "mutual_authentication": False,
            "delegate": True,
        }
        database.encrypted_extra = json.dumps(
            {"auth_method": "kerberos", "auth_params": auth_params}
        )

        params: Dict[str, Any] = {}
        TrinoEngineSpec.update_params_from_encrypted_extra(database, params)
        connect_args = params.setdefault("connect_args", {})
        self.assertEqual(connect_args.get("http_scheme"), "https")
        auth.assert_called_once_with(**auth_params)

    @patch("trino.auth.CertificateAuthentication")
    def test_auth_certificate(self, auth: Mock):
        database = Mock()

        auth_params = {"cert": "/path/to/cert.pem", "key": "/path/to/key.pem"}
        database.encrypted_extra = json.dumps(
            {"auth_method": "certificate", "auth_params": auth_params}
        )

        params: Dict[str, Any] = {}
        TrinoEngineSpec.update_params_from_encrypted_extra(database, params)
        connect_args = params.setdefault("connect_args", {})
        self.assertEqual(connect_args.get("http_scheme"), "https")
        auth.assert_called_once_with(**auth_params)

    @patch("trino.auth.JWTAuthentication")
    def test_auth_jwt(self, auth: Mock):
        database = Mock()

        auth_params = {"token": "jwt-token-string"}
        database.encrypted_extra = json.dumps(
            {"auth_method": "jwt", "auth_params": auth_params}
        )

        params: Dict[str, Any] = {}
        TrinoEngineSpec.update_params_from_encrypted_extra(database, params)
        connect_args = params.setdefault("connect_args", {})
        self.assertEqual(connect_args.get("http_scheme"), "https")
        auth.assert_called_once_with(**auth_params)

    def test_auth_custom_auth(self):
        database = Mock()
        auth_class = Mock()

        auth_method = "custom_auth"
        auth_params = {"params1": "params1", "params2": "params2"}
        database.encrypted_extra = json.dumps(
            {"auth_method": auth_method, "auth_params": auth_params}
        )

        with patch.dict(
            "superset.config.ALLOWED_EXTRA_AUTHENTICATIONS",
            {"trino": {"custom_auth": auth_class}},
            clear=True,
        ):
            params: Dict[str, Any] = {}
            TrinoEngineSpec.update_params_from_encrypted_extra(database, params)

            connect_args = params.setdefault("connect_args", {})
            self.assertEqual(connect_args.get("http_scheme"), "https")

            auth_class.assert_called_once_with(**auth_params)

    def test_auth_custom_auth_denied(self):
        database = Mock()
        auth_method = "my.module:TrinoAuthClass"
        auth_params = {"params1": "params1", "params2": "params2"}
        database.encrypted_extra = json.dumps(
            {"auth_method": auth_method, "auth_params": auth_params}
        )

        superset.config.ALLOWED_EXTRA_AUTHENTICATIONS = {}

        with pytest.raises(ValueError) as excinfo:
            TrinoEngineSpec.update_params_from_encrypted_extra(database, {})

        assert str(excinfo.value) == (
            f"For security reason, custom authentication '{auth_method}' "
            f"must be listed in 'ALLOWED_EXTRA_AUTHENTICATIONS' config"
        )

    def test_convert_dttm(self):
        dttm = self.get_dttm()

        self.assertEqual(
            TrinoEngineSpec.convert_dttm("TIMESTAMP", dttm),
            "TIMESTAMP '2019-01-02 03:04:05.678900'",
        )

        self.assertEqual(
            TrinoEngineSpec.convert_dttm("TIMESTAMP(3)", dttm),
            "TIMESTAMP '2019-01-02 03:04:05.678900'",
        )

        self.assertEqual(
            TrinoEngineSpec.convert_dttm("TIMESTAMP WITH TIME ZONE", dttm),
            "TIMESTAMP '2019-01-02 03:04:05.678900'",
        )

        self.assertEqual(
            TrinoEngineSpec.convert_dttm("TIMESTAMP(3) WITH TIME ZONE", dttm),
            "TIMESTAMP '2019-01-02 03:04:05.678900'",
        )

        self.assertEqual(
            TrinoEngineSpec.convert_dttm("DATE", dttm),
            "DATE '2019-01-02'",
        )

    def test_extra_table_metadata(self):
        db = mock.Mock()
        db.get_indexes = mock.Mock(
            return_value=[{"column_names": ["ds", "hour"], "name": "partition"}]
        )
        db.get_extra = mock.Mock(return_value={})
        db.has_view_by_name = mock.Mock(return_value=None)
        db.get_df = mock.Mock(
            return_value=pd.DataFrame({"ds": ["01-01-19"], "hour": [1]})
        )
        result = TrinoEngineSpec.extra_table_metadata(db, "test_table", "test_schema")
        assert result["partitions"]["cols"] == ["ds", "hour"]
        assert result["partitions"]["latest"] == {"ds": "01-01-19", "hour": 1}