All files / src/app/api/admin/support/stats route.ts

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export const dynamic = "force-dynamic";

/**
 * Admin Support Statistics API
 * GET /api/admin/support/stats - Get support dashboard statistics
 */

import { NextRequest, NextResponse } from 'next/server';
import { requireAdminRole, handleAuthError } from '@/lib/auth';
import { prisma } from '@/lib/prisma';
import { TicketStatus, TicketCategory, TicketPriority, SupportStats } from '@/types/support';
import { handleError } from '@/lib/error-handler';
import { logger } from '@/lib/logging';

export async function GET(request: NextRequest) {
  try {
    await requireAdminRole();

    // Parse date range from query params
    const { searchParams } = new URL(request.url);
    const daysBack = parseInt(searchParams.get('days') || '30', 10);
    const startDate = new Date();
    startDate.setDate(startDate.getDate() - daysBack);

    // Get total ticket counts
    const totalTickets = await prisma.supportTicket.count();

    const openTickets = await prisma.supportTicket.count({
      where: {
        status: {
          in: [
            TicketStatus.OPEN,
            TicketStatus.IN_PROGRESS,
            TicketStatus.AWAITING_CUSTOMER,
            TicketStatus.AWAITING_AGENT,
          ]}}});

    const resolvedTickets = await prisma.supportTicket.count({
      where: {
        status: {
          in: [TicketStatus.RESOLVED, TicketStatus.CLOSED]},
        resolvedAt: { gte: startDate }}});

    // Get tickets by status
    const ticketsByStatus: Record<TicketStatus, number> = {} as Record<TicketStatus, number>;
    for (const status of Object.values(TicketStatus)) {
      ticketsByStatus[status] = await prisma.supportTicket.count({
        where: { status }});
    }

    // Get tickets by category
    const ticketsByCategory: Record<TicketCategory, number> = {} as Record<
      TicketCategory,
      number
    >;
    for (const category of Object.values(TicketCategory)) {
      ticketsByCategory[category] = await prisma.supportTicket.count({
        where: { category }});
    }

    // Get tickets by priority
    const ticketsByPriority: Record<TicketPriority, number> = {} as Record<
      TicketPriority,
      number
    >;
    for (const priority of Object.values(TicketPriority)) {
      ticketsByPriority[priority] = await prisma.supportTicket.count({
        where: { priority }});
    }

    // Calculate average response time (in seconds)
    const ticketsWithResponse = await prisma.supportTicket.findMany({
      where: {
        firstResponseAt: { not: null },
        createdAt: { gte: startDate }},
      select: {
        createdAt: true,
        firstResponseAt: true}});

    let avgResponseTime: number | null = null;
    if (ticketsWithResponse.length > 0) {
      const totalResponseTime = ticketsWithResponse.reduce((sum, ticket) => {
        if (ticket.firstResponseAt) {
          return sum + (ticket.firstResponseAt.getTime() - ticket.createdAt.getTime());
        }
        return sum;
      }, 0);
      avgResponseTime = Math.round(totalResponseTime / ticketsWithResponse.length / 1000);
    }

    // Calculate average resolution time (in seconds)
    const resolvedTicketsWithTime = await prisma.supportTicket.findMany({
      where: {
        resolvedAt: { not: null },
        createdAt: { gte: startDate }},
      select: {
        createdAt: true,
        resolvedAt: true}});

    let avgResolutionTime: number | null = null;
    if (resolvedTicketsWithTime.length > 0) {
      const totalResolutionTime = resolvedTicketsWithTime.reduce((sum, ticket) => {
        if (ticket.resolvedAt) {
          return sum + (ticket.resolvedAt.getTime() - ticket.createdAt.getTime());
        }
        return sum;
      }, 0);
      avgResolutionTime = Math.round(
        totalResolutionTime / resolvedTicketsWithTime.length / 1000
      );
    }

    // Calculate customer satisfaction
    const surveys = await prisma.ticketSurvey.findMany({
      where: {
        createdAt: { gte: startDate }},
      select: { rating: true }});

    let customerSatisfaction: number | null = null;
    if (surveys.length > 0) {
      const totalRating = surveys.reduce((sum, survey) => sum + survey.rating, 0);
      customerSatisfaction = Math.round((totalRating / surveys.length) * 10) / 10;
    }

    // Get recent trends (tickets per day for chart)
    const ticketTrends = await prisma.$queryRaw<{ date: Date; count: bigint }[]>`
      SELECT DATE(createdAt) as date, COUNT(*) as count
      FROM support_tickets
      WHERE createdAt >= ${startDate}
      GROUP BY DATE(createdAt)
      ORDER BY date ASC
    `;

    const stats: SupportStats = {
      totalTickets,
      openTickets,
      resolvedTickets,
      avgResponseTime,
      avgResolutionTime,
      customerSatisfaction,
      ticketsByStatus,
      ticketsByCategory,
      ticketsByPriority};

    return NextResponse.json({
      success: true,
      data: {
        ...stats,
        trends: ticketTrends.map((t) => ({
          date: t.date,
          count: Number(t.count)})),
        period: {
          start: startDate,
          end: new Date(),
          days: daysBack}}});
  } catch (error) {
    const authResponse = handleAuthError(error as Error);
    if (authResponse) return authResponse;

    logger.error('Error fetching support stats', error instanceof Error ? error : new Error(String(error)), { category: 'ADMIN_SUPPORT' });
    return handleError(error);
  }
}