"""DAG for adjustment file import process."""

from datetime import datetime

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

from lib import constants
from tasks.adjustment_file_import.invoke_adjustment_file_import_lambda import \
    invoke_adjustment_file_import_lambda_task
from tasks.adjustment_file_import.notify_failure import notify_failure_task
from tasks.adjustment_file_import.notify_started import notify_started_task
from tasks.adjustment_file_import.notify_success import notify_success_task


dag = DAG(
    constants.DAG_ADJUSTMENT_FILE_IMPORT_NAME,
    description='Import worksheet adjustments',
    start_date=datetime(2019, 1, 1),
    default_args={'provide_context': True},
    schedule_interval=None
)

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


invoke_adjustment_file_import_lambda_operator = PythonOperator(
    task_id='invoke_adjustment_file_import_lambda',
    python_callable=invoke_adjustment_file_import_lambda_task,
    dag=dag
)

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

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

notify_success_operator = PythonOperator(
    dag=dag,
    python_callable=notify_success_task,
    task_id='notify_success'
)

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