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from unittest import TestCase, mock

from azure.core.exceptions import ResourceNotFoundError

from airflow.providers.microsoft.azure.secrets.key_vault import AzureKeyVaultBackend


class TestAzureKeyVaultBackend(TestCase):
    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend.get_conn_value')
    def test_get_connections(self, mock_get_value):
        mock_get_value.return_value = 'scheme://user:pass@host:100'
        conn_list = AzureKeyVaultBackend().get_connections('fake_conn')
        conn = conn_list[0]
        assert conn.host == 'host'

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.DefaultAzureCredential')
    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.SecretClient')
    def test_get_conn_uri(self, mock_secret_client, mock_azure_cred):
        mock_cred = mock.Mock()
        mock_sec_client = mock.Mock()
        mock_azure_cred.return_value = mock_cred
        mock_secret_client.return_value = mock_sec_client

        mock_sec_client.get_secret.return_value = mock.Mock(
            value='postgresql://airflow:airflow@host:5432/airflow'
        )

        backend = AzureKeyVaultBackend(vault_url="https://example-akv-resource-name.vault.azure.net/")
        returned_uri = backend.get_conn_uri(conn_id='hi')
        mock_secret_client.assert_called_once_with(
            credential=mock_cred, vault_url='https://example-akv-resource-name.vault.azure.net/'
        )
        assert returned_uri == 'postgresql://airflow:airflow@host:5432/airflow'

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend.client')
    def test_get_conn_uri_non_existent_key(self, mock_client):
        """
        Test that if the key with connection ID is not present,
        AzureKeyVaultBackend.get_connections should return None
        """
        conn_id = 'test_mysql'
        mock_client.get_secret.side_effect = ResourceNotFoundError
        backend = AzureKeyVaultBackend(vault_url="https://example-akv-resource-name.vault.azure.net/")

        assert backend.get_conn_uri(conn_id=conn_id) is None
        assert [] == backend.get_connections(conn_id=conn_id)

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend.client')
    def test_get_variable(self, mock_client):
        mock_client.get_secret.return_value = mock.Mock(value='world')
        backend = AzureKeyVaultBackend()
        returned_uri = backend.get_variable('hello')
        mock_client.get_secret.assert_called_with(name='airflow-variables-hello')
        assert 'world' == returned_uri

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend.client')
    def test_get_variable_non_existent_key(self, mock_client):
        """
        Test that if Variable key is not present,
        AzureKeyVaultBackend.get_variables should return None
        """
        mock_client.get_secret.side_effect = ResourceNotFoundError
        backend = AzureKeyVaultBackend()
        assert backend.get_variable('test_mysql') is None

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend.client')
    def test_get_secret_value_not_found(self, mock_client):
        """
        Test that if a non-existent secret returns None
        """
        mock_client.get_secret.side_effect = ResourceNotFoundError
        backend = AzureKeyVaultBackend()
        assert (
            backend._get_secret(path_prefix=backend.connections_prefix, secret_id='test_non_existent') is None
        )

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend.client')
    def test_get_secret_value(self, mock_client):
        """
        Test that get_secret returns the secret value
        """
        mock_client.get_secret.return_value = mock.Mock(value='super-secret')
        backend = AzureKeyVaultBackend()
        secret_val = backend._get_secret('af-secrets', 'test_mysql_password')
        mock_client.get_secret.assert_called_with(name='af-secrets-test-mysql-password')
        assert secret_val == 'super-secret'

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend._get_secret')
    def test_connection_prefix_none_value(self, mock_get_secret):
        """
        Test that if Connections prefix is None,
        AzureKeyVaultBackend.get_connections should return None
        AzureKeyVaultBackend._get_secret should not be called
        """
        kwargs = {'connections_prefix': None}

        backend = AzureKeyVaultBackend(**kwargs)
        assert backend.get_conn_uri('test_mysql') is None
        mock_get_secret.assert_not_called()

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend._get_secret')
    def test_variable_prefix_none_value(self, mock_get_secret):
        """
        Test that if Variables prefix is None,
        AzureKeyVaultBackend.get_variables should return None
        AzureKeyVaultBackend._get_secret should not be called
        """
        kwargs = {'variables_prefix': None}

        backend = AzureKeyVaultBackend(**kwargs)
        assert backend.get_variable('hello') is None
        mock_get_secret.assert_not_called()

    @mock.patch('airflow.providers.microsoft.azure.secrets.key_vault.AzureKeyVaultBackend._get_secret')
    def test_config_prefix_none_value(self, mock_get_secret):
        """
        Test that if Config prefix is None,
        AzureKeyVaultBackend.get_config should return None
        AzureKeyVaultBackend._get_secret should not be called
        """
        kwargs = {'config_prefix': None}

        backend = AzureKeyVaultBackend(**kwargs)
        assert backend.get_config('test_mysql') is None
        mock_get_secret.assert_not_called()