"""Aggregate status API blueprint.

Exposed at /api/status/* and delegates all operations to vacuum-walld.
"""

from __future__ import annotations

import logging

from flask import Blueprint, request

from daemon.client import get, post
from daemon.iface import (
    GET_STATUS_PENDING,
    GET_SYSTEM_METRICS,
    POST_STATUS_APPLY_ALL,
    POST_STATUS_REFRESH,
)
from webui.api.common import _error, _ok

logger = logging.getLogger(__name__)
bp = Blueprint("status", __name__)


@bp.route("/pending", methods=["GET"])
def pending():
    """Retrieve aggregate pending changes across all subsystems.

    Endpoint:
        GET /api/status/pending

    Returns:
        JSON response with per-subsystem pending status and total change count.
    """
    try:
        return _ok(get(GET_STATUS_PENDING))
    except RuntimeError as exc:
        logger.error("Failed to get pending status: %s", exc)
        return _error(str(exc), 500)


@bp.route("/apply-all", methods=["POST"])
def apply_all():
    """Apply pending changes for all subsystems in dependency order.

    Endpoint:
        POST /api/status/apply-all

    Returns:
        JSON response with applied subsystems list and any errors encountered.
    """
    try:
        return _ok(post(POST_STATUS_APPLY_ALL))
    except RuntimeError as exc:
        logger.error("Failed to apply all pending changes: %s", exc)
        return _error(str(exc), 500)


@bp.route("/refresh", methods=["POST"])
def refresh():
    """Re-collect state from the daemon, optionally filtered by subsystem.

    Endpoint:
        POST /api/status/refresh
    Body:
        {"subsystems": ["firewall"]} or {} for all.
    """
    body = request.get_json(silent=True) or {}
    try:
        return _ok(post(POST_STATUS_REFRESH, body))
    except RuntimeError as exc:
        logger.error("Failed to refresh state: %s", exc)
        return _error(str(exc), 500)


@bp.route("/system-metrics", methods=["GET"])
def system_metrics():
    """Retrieve system-wide metrics.

    Endpoint:
        GET /api/status/system-metrics

    Returns:
        JSON response with CPU load, memory usage, and network traffic stats.
    """
    try:
        return _ok(get(GET_SYSTEM_METRICS))
    except RuntimeError as exc:
        logger.error("Failed to get system metrics: %s", exc)
        return _error(str(exc), 500)