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#
#   http://www.apache.org/licenses/LICENSE-2.0
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from airflow.api_connexion.schemas.health_schema import health_schema
from airflow.api_connexion.types import APIResponse
from airflow.jobs.scheduler_job import SchedulerJob

HEALTHY = "healthy"
UNHEALTHY = "unhealthy"


def get_health() -> APIResponse:
    """Return the health of the airflow scheduler and metadatabase"""
    metadatabase_status = HEALTHY
    latest_scheduler_heartbeat = None
    scheduler_status = UNHEALTHY
    try:
        scheduler_job = SchedulerJob.most_recent_job()

        if scheduler_job:
            latest_scheduler_heartbeat = scheduler_job.latest_heartbeat.isoformat()
            if scheduler_job.is_alive():
                scheduler_status = HEALTHY
    except Exception:
        metadatabase_status = UNHEALTHY

    payload = {
        "metadatabase": {"status": metadatabase_status},
        "scheduler": {
            "status": scheduler_status,
            "latest_scheduler_heartbeat": latest_scheduler_heartbeat,
        },
    }

    return health_schema.dump(payload)
