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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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from __future__ import annotations

from json import loads
from typing import Any

from fastapi import Depends, status

from airflow.api_fastapi.common.router import AirflowRouter
from airflow.api_fastapi.common.types import UIAlert
from airflow.api_fastapi.core_api.datamodels.ui.config import ConfigResponse
from airflow.api_fastapi.core_api.openapi.exceptions import create_openapi_http_exception_doc
from airflow.api_fastapi.core_api.security import requires_authenticated
from airflow.configuration import conf
from airflow.settings import DASHBOARD_UIALERTS
from airflow.utils.log.log_reader import TaskLogReader

config_router = AirflowRouter(tags=["Config"])


API_CONFIG_KEYS = [
    "enable_swagger_ui",
    "hide_paused_dags_by_default",
    "fallback_page_limit",
    "default_wrap",
    "auto_refresh_interval",
    "require_confirmation_dag_change",
]


@config_router.get(
    "/config",
    responses=create_openapi_http_exception_doc([status.HTTP_404_NOT_FOUND]),
    dependencies=[Depends(requires_authenticated())],
)
def get_configs() -> ConfigResponse:
    """Get configs for UI."""
    config = {key: conf.get("api", key) for key in API_CONFIG_KEYS}

    task_log_reader = TaskLogReader()
    additional_config: dict[str, Any] = {
        "instance_name": conf.get("api", "instance_name", fallback="Airflow"),
        "test_connection": conf.get("core", "test_connection", fallback="Disabled"),
        # Expose "dashboard_alert" using a list comprehension so UIAlert instances can be expressed dynamically.
        "dashboard_alert": [alert for alert in DASHBOARD_UIALERTS if isinstance(alert, UIAlert)],
        "show_external_log_redirect": task_log_reader.supports_external_link,
        "external_log_name": getattr(task_log_reader.log_handler, "log_name", None),
        "theme": loads(conf.get("api", "theme", fallback="{}")) or None,
        "multi_team": conf.getboolean("core", "multi_team"),
    }

    config.update({key: value for key, value in additional_config.items()})

    return ConfigResponse.model_validate(config)
