"""DAG to release reserves for a specified statement period."""

from datetime import datetime

from airflow import DAG
from airflow.operators.python import PythonOperator

from lib import constants
from tasks.reserves_release.invoke_reserves_release_lambda import \
    invoke_reserves_release_lambda_task
from tasks.reserves_release.notify_failure import \
    notify_failure_task
from tasks.reserves_release.notify_started import \
    notify_started_task
from tasks.reserves_release.notify_success import \
    notify_success_task


dag = DAG(
    constants.DAG_RESERVES_RELEASE_NAME,
    description="Reserves are credited back to an account\'s ledger.",
    start_date=datetime(2019, 1, 1),
    default_args={'provide_context': True},
    schedule_interval=None
)

"""
######################################################################
############################# OPERATORS ##############################
######################################################################
"""

invoke_reserves_release_lambda_operator = PythonOperator(
    dag=dag,
    python_callable=invoke_reserves_release_lambda_task,
    task_id='invoke_reserves_release_processor'
)

notify_failure_operator = PythonOperator(
    dag=dag,
    python_callable=notify_failure_task,
    task_id='notify_reserves_release_lambda_failure',
    trigger_rule='one_failed'
)

notify_started_operator = PythonOperator(
    dag=dag,
    python_callable=notify_started_task,
    task_id='notify_reserves_release_lambda_started'
)

notify_success_operator = PythonOperator(
    dag=dag,
    python_callable=notify_success_task,
    task_id='notify_reserves_release_lambda_success',
    trigger_rule='none_failed'
)

notify_started_operator >> \
    invoke_reserves_release_lambda_operator >> \
    [notify_success_operator, notify_failure_operator]