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from __future__ import annotations

import json
import logging
import os
from datetime import datetime
from typing import Any

from tests_common.test_utils.version_compat import AIRFLOW_V_3_0_PLUS

if AIRFLOW_V_3_0_PLUS:
    from airflow.sdk import task
else:
    # Airflow 2 path
    from airflow.decorators import task  # type: ignore[attr-defined,no-redef]
from airflow.models.dag import DAG
from airflow.providers.google.cloud.operators.gcs import GCSCreateBucketOperator, GCSDeleteBucketOperator
from airflow.providers.google.cloud.transfers.calendar_to_gcs import GoogleCalendarToGCSOperator

try:
    from airflow.sdk import TriggerRule
except ImportError:
    # Compatibility for Airflow < 3.1
    from airflow.utils.trigger_rule import TriggerRule  # type: ignore[no-redef,attr-defined]

from system.google.gcp_api_client_helpers import create_airflow_connection, delete_airflow_connection

ENV_ID = os.environ.get("SYSTEM_TESTS_ENV_ID", "default")
PROJECT_ID = os.environ.get("SYSTEM_TESTS_GCP_PROJECT", "default")
DAG_ID = "calendar_to_gcs"

IS_COMPOSER = bool(os.environ.get("COMPOSER_ENVIRONMENT", ""))

BUCKET_NAME = f"bucket_{DAG_ID}_{ENV_ID}"
CALENDAR_ID = os.environ.get("CALENDAR_ID", "primary")
API_VERSION = "v3"

CONNECTION_ID = f"connection_{DAG_ID}_{ENV_ID}"

log = logging.getLogger(__name__)

with DAG(
    DAG_ID,
    schedule="@once",  # Override to match your needs
    start_date=datetime(2021, 1, 1),
    catchup=False,
    tags=["example", "calendar"],
) as dag:
    create_bucket = GCSCreateBucketOperator(
        task_id="create_bucket", bucket_name=BUCKET_NAME, project_id=PROJECT_ID
    )

    @task
    def create_connection(connection_id: str):
        conn_extra = {
            "scope": "https://www.googleapis.com/auth/calendar",
            "project": PROJECT_ID,
            "keyfile_dict": "",  # Override to match your needs
        }
        conn_extra_json = json.dumps(conn_extra)
        connection: dict[str, Any] = {"conn_type": "google_cloud_platform", "extra": conn_extra_json}
        create_airflow_connection(
            connection_id=connection_id,
            connection_conf=connection,
            is_composer=IS_COMPOSER,
        )

    create_connection_task = create_connection(connection_id=CONNECTION_ID)

    # [START upload_calendar_to_gcs]
    upload_calendar_to_gcs = GoogleCalendarToGCSOperator(
        task_id="upload_calendar_to_gcs",
        destination_bucket=BUCKET_NAME,
        calendar_id=CALENDAR_ID,
        api_version=API_VERSION,
        gcp_conn_id=CONNECTION_ID,
    )
    # [END upload_calendar_to_gcs]

    @task(task_id="delete_connection")
    def delete_connection(connection_id: str) -> None:
        delete_airflow_connection(connection_id=connection_id, is_composer=IS_COMPOSER)

    delete_connection_task = delete_connection(connection_id=CONNECTION_ID)

    delete_bucket = GCSDeleteBucketOperator(
        task_id="delete_bucket", bucket_name=BUCKET_NAME, trigger_rule=TriggerRule.ALL_DONE
    )

    (
        # TEST SETUP
        create_bucket
        >> create_connection_task
        # TEST BODY
        >> upload_calendar_to_gcs
        # TEST TEARDOWN
        >> delete_connection_task
        >> delete_bucket
    )

    from tests_common.test_utils.watcher import watcher

    # This test needs watcher in order to properly mark success/failure
    # when "tearDown" task with trigger rule is part of the DAG
    list(dag.tasks) >> watcher()

from tests_common.test_utils.system_tests import get_test_run  # noqa: E402

# Needed to run the example DAG with pytest (see: contributing-docs/testing/system_tests.rst)
test_run = get_test_run(dag)
