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"""
Example usage of the TriggerDagRunOperator. This example holds 2 DAGs:
1. 1st DAG (example_trigger_controller_dag) holds a TriggerDagRunOperator, which will trigger the 2nd DAG
2. 2nd DAG (example_trigger_target_dag) which will be triggered by the TriggerDagRunOperator in the 1st DAG
"""
from airflow import DAG
from airflow.operators.trigger_dagrun import TriggerDagRunOperator
from airflow.utils.dates import days_ago

dag = DAG(
    dag_id="example_trigger_controller_dag",
    default_args={"owner": "airflow"},
    start_date=days_ago(2),
    schedule_interval="@once",
    tags=['example'],
)

trigger = TriggerDagRunOperator(
    task_id="test_trigger_dagrun",
    trigger_dag_id="example_trigger_target_dag",  # Ensure this equals the dag_id of the DAG to trigger
    conf={"message": "Hello World"},
    dag=dag,
)
