"""
Powers the [jetstream](https://experimenter.info/jetstream/jetstream/)
analysis framework for experiments.

See the [jetstream repository](https://github.com/mozilla/jetstream).

*Triage notes*

In case jetstream configuration is modified it is perfectly normal for the task
`jetstream_run_config_changed` to take significantly longer to complete (hours instead of minutes).
In these cases we expect anything below 12 hours, only after that amount of time should
this task be considered potentially faulty and subject to the triage process.
"""  # noqa: D205

from datetime import datetime, timedelta

from airflow import DAG
from airflow.sensors.external_task import ExternalTaskSensor

from operators.gcp_container_operator import GKEPodOperator
from utils.constants import ALLOWED_STATES, FAILED_STATES
from utils.tags import Tag

default_args = {
    "owner": "ascholtz@mozilla.com",
    "email": [
        "ascholtz@mozilla.com",
        "mwilliams@mozilla.com",
    ],
    "depends_on_past": False,
    "start_date": datetime(2020, 3, 12),
    "email_on_failure": True,
    "email_on_retry": True,
    "retries": 2,
    "retry_delay": timedelta(minutes=30),
}

tags = [Tag.ImpactTier.tier_1]

with DAG(
    "jetstream",
    default_args=default_args,
    schedule_interval="0 4 * * *",
    doc_md=__doc__,
    tags=tags,
) as dag:
    # Built from repo https://github.com/mozilla/jetstream
    jetstream_image = "gcr.io/moz-fx-data-experiments/jetstream:latest"

    jetstream_run = GKEPodOperator(
        task_id="jetstream_run",
        name="jetstream_run",
        image=jetstream_image,
        email=default_args["email"],
        arguments=[
            "--log_to_bigquery",
            "run-argo",
            "--date={{ ds }}",
            # the Airflow cluster doesn't have Compute Engine API access so pass in IP
            # and certificate in order for the pod to connect to the Kubernetes cluster
            # running Jetstream
            "--cluster-ip={{ var.value.jetstream_cluster_ip }}",
            "--cluster-cert={{ var.value.jetstream_cluster_cert }}",
        ],
        dag=dag,
    )

    jetstream_config_changed = GKEPodOperator(
        task_id="jetstream_run_config_changed",
        name="jetstream_run_config_changed",
        image=jetstream_image,
        email=default_args["email"],
        arguments=[
            "--log_to_bigquery",
            "rerun-config-changed",
            "--argo",
            # the Airflow cluster doesn't have Compute Engine API access so pass in IP
            # and certificate in order for the pod to connect to the Kubernetes cluster
            # running Jetstream
            "--cluster-ip={{ var.value.jetstream_cluster_ip }}",
            "--cluster-cert={{ var.value.jetstream_cluster_cert }}",
        ],
        dag=dag,
    )

    wait_for_clients_daily_export = ExternalTaskSensor(
        task_id="wait_for_clients_daily",
        external_dag_id="bqetl_main_summary",
        external_task_id="telemetry_derived__clients_daily__v6",
        execution_delta=timedelta(hours=2),
        mode="reschedule",
        allowed_states=ALLOWED_STATES,
        failed_states=FAILED_STATES,
        pool="DATA_ENG_EXTERNALTASKSENSOR",
        email_on_retry=False,
        dag=dag,
    )

    wait_for_search_clients_daily = ExternalTaskSensor(
        task_id="wait_for_search_clients_daily",
        external_dag_id="bqetl_search",
        external_task_id="search_derived__search_clients_daily__v8",
        execution_delta=timedelta(hours=1),
        mode="reschedule",
        allowed_states=ALLOWED_STATES,
        failed_states=FAILED_STATES,
        pool="DATA_ENG_EXTERNALTASKSENSOR",
        email_on_retry=False,
        dag=dag,
    )

    wait_for_bq_events = ExternalTaskSensor(
        task_id="wait_for_bq_main_events",
        external_dag_id="copy_deduplicate",
        external_task_id="bq_main_events",
        execution_delta=timedelta(hours=3),
        mode="reschedule",
        allowed_states=ALLOWED_STATES,
        failed_states=FAILED_STATES,
        pool="DATA_ENG_EXTERNALTASKSENSOR",
        email_on_retry=False,
        dag=dag,
    )

    wait_for_copy_deduplicate_events = ExternalTaskSensor(
        task_id="wait_for_event_events",
        external_dag_id="copy_deduplicate",
        external_task_id="event_events",
        execution_delta=timedelta(hours=3),
        mode="reschedule",
        allowed_states=ALLOWED_STATES,
        failed_states=FAILED_STATES,
        pool="DATA_ENG_EXTERNALTASKSENSOR",
        email_on_retry=False,
        dag=dag,
    )

    jetstream_run.set_upstream(
        [
            wait_for_clients_daily_export,
            wait_for_search_clients_daily,
            wait_for_bq_events,
            wait_for_copy_deduplicate_events,
        ]
    )
    jetstream_config_changed.set_upstream(jetstream_run)