All files / src/app/api/admin/monitoring/alerts route.ts

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export const dynamic = 'force-dynamic';

import { NextRequest, NextResponse } from 'next/server';
import { prisma } from '@/lib/prisma';
import {
  withAdmin,
  withErrorHandling,
  successResponse,
  errorResponse,
  type ApiSuccessResponse,
  type ApiErrorResponse,
  type AuthenticatedUser,
} from '@/lib/api';
import type { PerformanceAlertConfig, PerformanceAlert, Prisma } from '@prisma/client';
import type { Session } from 'next-auth';
import { getSchedulerStatus } from '@/lib/monitoring/alertScheduler';

/**
 * Alert config with alerts included
 */
type AlertConfigWithAlerts = PerformanceAlertConfig & {
  alerts: PerformanceAlert[];
  _count: { alerts: number };
};

/**
 * Response structure for alert configs list
 */
interface AlertConfigsResponse {
  configs: AlertConfigWithAlerts[];
  activeAlerts: PerformanceAlert[];
  schedulerStatus: Awaited<ReturnType<typeof getSchedulerStatus>>;
  pagination: {
    page: number;
    limit: number;
    total: number;
    totalPages: number;
  };
}

/**
 * Input for creating a new alert config
 */
interface CreateAlertConfigInput {
  name: string;
  description?: string;
  metricType: string;
  scope: string;
  warningThreshold: number;
  criticalThreshold: number;
  evaluationWindow?: number;
  evaluationInterval?: number;
  minSamples?: number;
  notifyOnWarning?: boolean;
  notifyOnCritical?: boolean;
  notificationChannels?: string[];
  cooldownMinutes?: number;
  enabled?: boolean;
}

/**
 * GET /api/admin/monitoring/alerts
 *
 * Returns alert configurations and active alerts.
 * Requires admin authentication.
 */
async function handleGet(
  request: NextRequest
): Promise<NextResponse<ApiSuccessResponse<AlertConfigsResponse> | ApiErrorResponse>> {
  const { searchParams } = new URL(request.url);

  const page = Math.max(1, parseInt(searchParams.get('page') || '1', 10));
  const limit = Math.min(100, Math.max(1, parseInt(searchParams.get('limit') || '20', 10)));
  const skip = (page - 1) * limit;
  const enabled = searchParams.get('enabled');
  const metricType = searchParams.get('metricType');

  // Build where clause
  const where: Prisma.PerformanceAlertConfigWhereInput = {};
  if (enabled !== null) {
    where.enabled = enabled === 'true';
  }
  if (metricType) {
    where.metricType = metricType;
  }

  // Fetch configs, active alerts, and scheduler status in parallel
  const [configs, total, activeAlerts, schedulerStatus] = await Promise.all([
    prisma.performanceAlertConfig.findMany({
      where,
      include: {
        alerts: {
          where: { status: 'active' },
          orderBy: { triggeredAt: 'desc' },
          take: 5,
        },
        _count: { select: { alerts: true } },
      },
      orderBy: { createdAt: 'desc' },
      skip,
      take: limit,
    }),
    prisma.performanceAlertConfig.count({ where }),
    prisma.performanceAlert.findMany({
      where: { status: 'active' },
      include: { config: true },
      orderBy: { triggeredAt: 'desc' },
      take: 20,
    }),
    getSchedulerStatus(),
  ]);

  return successResponse({
    configs,
    activeAlerts,
    schedulerStatus,
    pagination: {
      page,
      limit,
      total,
      totalPages: Math.ceil(total / limit),
    },
  });
}

/**
 * POST /api/admin/monitoring/alerts
 *
 * Create a new alert configuration.
 * Requires admin authentication.
 */
async function handlePost(
  request: NextRequest,
  _context: { params?: Promise<Record<string, string>> } | undefined,
  _session: Session,
  user: AuthenticatedUser
): Promise<NextResponse<ApiSuccessResponse<{ config: PerformanceAlertConfig }> | ApiErrorResponse>> {
  const body = (await request.json()) as CreateAlertConfigInput;

  // Validate required fields
  if (!body.name || !body.metricType || !body.scope) {
    return errorResponse('VALIDATION_ERROR', 'name, metricType, and scope are required');
  }

  if (body.warningThreshold === undefined || body.criticalThreshold === undefined) {
    return errorResponse('VALIDATION_ERROR', 'warningThreshold and criticalThreshold are required');
  }

  // Validate thresholds
  if (body.warningThreshold >= body.criticalThreshold) {
    return errorResponse('VALIDATION_ERROR', 'warningThreshold must be less than criticalThreshold');
  }

  // Validate metricType
  const validMetricTypes = ['response_time', 'error_rate', 'throughput', 'p95_latency'];
  if (!validMetricTypes.includes(body.metricType)) {
    return errorResponse('VALIDATION_ERROR', `metricType must be one of: ${validMetricTypes.join(', ')}`);
  }

  const config = await prisma.performanceAlertConfig.create({
    data: {
      name: body.name,
      description: body.description,
      metricType: body.metricType,
      scope: body.scope,
      warningThreshold: body.warningThreshold,
      criticalThreshold: body.criticalThreshold,
      evaluationWindow: body.evaluationWindow ?? 300,
      evaluationInterval: body.evaluationInterval ?? 60,
      minSamples: body.minSamples ?? 10,
      notifyOnWarning: body.notifyOnWarning ?? true,
      notifyOnCritical: body.notifyOnCritical ?? true,
      notificationChannels: body.notificationChannels ?? ['email'],
      cooldownMinutes: body.cooldownMinutes ?? 15,
      enabled: body.enabled ?? true,
      createdBy: user.id,
    },
  });

  return successResponse({ config }, { status: 201 });
}

// Export handlers with middleware
export const GET = withErrorHandling(withAdmin(handleGet));
export const POST = withErrorHandling(withAdmin(handlePost));