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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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from typing import Optional

from sqlalchemy import func
from sqlalchemy.orm import Session

from airflow.api_connexion import security
from airflow.api_connexion.exceptions import NotFound
from airflow.api_connexion.parameters import apply_sorting, check_limit, format_parameters
from airflow.api_connexion.schemas.event_log_schema import (
    EventLogCollection,
    event_log_collection_schema,
    event_log_schema,
)
from airflow.api_connexion.types import APIResponse
from airflow.models import Log
from airflow.security import permissions
from airflow.utils.session import NEW_SESSION, provide_session


@security.requires_access([(permissions.ACTION_CAN_READ, permissions.RESOURCE_AUDIT_LOG)])
@provide_session
def get_event_log(*, event_log_id: int, session: Session = NEW_SESSION) -> APIResponse:
    """Get a log entry"""
    event_log = session.query(Log).get(event_log_id)
    if event_log is None:
        raise NotFound("Event Log not found")
    return event_log_schema.dump(event_log)


@security.requires_access([(permissions.ACTION_CAN_READ, permissions.RESOURCE_AUDIT_LOG)])
@format_parameters({"limit": check_limit})
@provide_session
def get_event_logs(
    *,
    limit: int,
    offset: Optional[int] = None,
    order_by: str = "event_log_id",
    session: Session = NEW_SESSION,
) -> APIResponse:
    """Get all log entries from event log"""
    to_replace = {"event_log_id": "id", "when": "dttm"}
    allowed_filter_attrs = [
        'event_log_id',
        "when",
        "dag_id",
        "task_id",
        "event",
        "execution_date",
        "owner",
        "extra",
    ]
    total_entries = session.query(func.count(Log.id)).scalar()
    query = session.query(Log)
    query = apply_sorting(query, order_by, to_replace, allowed_filter_attrs)
    event_logs = query.offset(offset).limit(limit).all()
    return event_log_collection_schema.dump(
        EventLogCollection(event_logs=event_logs, total_entries=total_entries)
    )
