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"""
Example Airflow DAG that uses Google AutoML services.
"""
import os

from airflow import models
from airflow.providers.google.cloud.hooks.automl import CloudAutoMLHook
from airflow.providers.google.cloud.operators.automl import (
    AutoMLCreateDatasetOperator, AutoMLDeleteDatasetOperator, AutoMLDeleteModelOperator,
    AutoMLImportDataOperator, AutoMLTrainModelOperator,
)
from airflow.utils.dates import days_ago

GCP_PROJECT_ID = os.environ.get("GCP_PROJECT_ID", "your-project-id")
GCP_AUTOML_LOCATION = os.environ.get("GCP_AUTOML_LOCATION", "us-central1")
GCP_AUTOML_VIDEO_BUCKET = os.environ.get(
    "GCP_AUTOML_VIDEO_BUCKET", "gs://automl-video-demo-data/hmdb_split1.csv"
)

# Example values
DATASET_ID = "VCN123455678"

# Example model
MODEL = {
    "display_name": "auto_model_1",
    "dataset_id": DATASET_ID,
    "video_classification_model_metadata": {},
}

# Example dataset
DATASET = {
    "display_name": "test_video_dataset",
    "video_classification_dataset_metadata": {},
}

IMPORT_INPUT_CONFIG = {"gcs_source": {"input_uris": [GCP_AUTOML_VIDEO_BUCKET]}}

default_args = {"start_date": days_ago(1)}
extract_object_id = CloudAutoMLHook.extract_object_id


# Example DAG for AutoML Video Intelligence Classification
with models.DAG(
    "example_automl_video",
    default_args=default_args,
    schedule_interval=None,  # Override to match your needs
    user_defined_macros={"extract_object_id": extract_object_id},
    tags=['example'],
) as example_dag:
    create_dataset_task = AutoMLCreateDatasetOperator(
        task_id="create_dataset_task", dataset=DATASET, location=GCP_AUTOML_LOCATION
    )

    dataset_id = (
        '{{ task_instance.xcom_pull("create_dataset_task", key="dataset_id") }}'
    )

    import_dataset_task = AutoMLImportDataOperator(
        task_id="import_dataset_task",
        dataset_id=dataset_id,
        location=GCP_AUTOML_LOCATION,
        input_config=IMPORT_INPUT_CONFIG,
    )

    MODEL["dataset_id"] = dataset_id

    create_model = AutoMLTrainModelOperator(
        task_id="create_model", model=MODEL, location=GCP_AUTOML_LOCATION
    )

    model_id = "{{ task_instance.xcom_pull('create_model', key='model_id') }}"

    delete_model_task = AutoMLDeleteModelOperator(
        task_id="delete_model_task",
        model_id=model_id,
        location=GCP_AUTOML_LOCATION,
        project_id=GCP_PROJECT_ID,
    )

    delete_datasets_task = AutoMLDeleteDatasetOperator(
        task_id="delete_datasets_task",
        dataset_id=dataset_id,
        location=GCP_AUTOML_LOCATION,
        project_id=GCP_PROJECT_ID,
    )

    create_dataset_task >> import_dataset_task >> create_model >> \
        delete_model_task >> delete_datasets_task
