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import unittest

from airflow.providers.amazon.aws.hooks.logs import AwsLogsHook

try:
    from moto import mock_logs
except ImportError:
    mock_logs = None


class TestAwsLogsHook(unittest.TestCase):
    @unittest.skipIf(mock_logs is None, 'mock_logs package not present')
    @mock_logs
    def test_get_conn_returns_a_boto3_connection(self):
        hook = AwsLogsHook(aws_conn_id='aws_default', region_name="us-east-1")
        assert hook.get_conn() is not None

    @unittest.skipIf(mock_logs is None, 'mock_logs package not present')
    # moto.logs does not support proper pagination so we cannot test that yet
    # https://github.com/spulec/moto/issues/2259
    @mock_logs
    def test_get_log_events(self):
        log_group_name = 'example-group'
        log_stream_name = 'example-log-stream'

        hook = AwsLogsHook(aws_conn_id='aws_default', region_name="us-east-1")

        # First we create some log events
        conn = hook.get_conn()
        conn.create_log_group(logGroupName=log_group_name)
        conn.create_log_stream(logGroupName=log_group_name, logStreamName=log_stream_name)

        input_events = [{'timestamp': 1, 'message': 'Test Message 1'}]

        conn.put_log_events(
            logGroupName=log_group_name, logStreamName=log_stream_name, logEvents=input_events
        )

        events = hook.get_log_events(log_group=log_group_name, log_stream_name=log_stream_name)

        # Iterate through entire generator
        events = list(events)
        count = len(events)

        assert count == 1
        assert events[0]['timestamp'] == input_events[0]['timestamp']
        assert events[0]['message'] == input_events[0]['message']
