"""REST surface for per-domain bandwidth accounting.

Mounted at /api/v1/bandwidth (registered in app/__init__.py).
"""
from flask import Blueprint, jsonify, request

from ..middleware.rbac import admin_required, viewer_required
from ..services.bandwidth_service import BandwidthService

bandwidth_bp = Blueprint('bandwidth', __name__)


@bandwidth_bp.route('/apps', methods=['GET'])
@viewer_required
def get_apps_bandwidth():
    """Month totals + 30-day sparkline series for every app with traffic —
    one call for the Services list."""
    try:
        data = BandwidthService.overview(days=30)
        # JSON object keys must be strings.
        return jsonify({'apps': {str(k): v for k, v in data.items()}})
    except Exception as exc:  # noqa: BLE001 — surface as a clean JSON error
        return jsonify({'error': str(exc)}), 500


@bandwidth_bp.route('/apps/<int:app_id>', methods=['GET'])
@viewer_required
def get_app_bandwidth(app_id):
    """Full daily series (default 90 days) + current-month total for one app."""
    try:
        days = request.args.get('days', 90, type=int)
        series = BandwidthService.series(app_id=app_id, days=days)
        return jsonify({
            'app_id': app_id,
            'days': len(series),
            'series': series,
            'month_bytes': BandwidthService.monthly_total(app_id),
        })
    except Exception as exc:  # noqa: BLE001
        return jsonify({'error': str(exc)}), 500


@bandwidth_bp.route('/aggregate', methods=['POST'])
@admin_required
def run_aggregate():
    """Run the daily aggregation now (optionally for a specific day)."""
    try:
        payload = request.get_json(silent=True) or {}
        result = BandwidthService.aggregate(day=payload.get('day'))
        return jsonify(result)
    except ValueError:
        return jsonify({'error': 'day must be YYYY-MM-DD'}), 400
    except Exception as exc:  # noqa: BLE001
        return jsonify({'error': str(exc)}), 500