All files / src/app/api/loyalty/history route.ts

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import { NextRequest, NextResponse } from 'next/server';
import { Session } from "next-auth";
import { prisma } from "@/lib/prisma";
import {
  withAuth,
  withErrorHandling,
  paginatedResponse,
  ApiSuccessResponse,
  ApiErrorResponse,
  RouteContext } from "@/lib/api";

interface LoyaltyTransaction {
  id: number;
  type: string;
  points: number;
  description: string | null;
  orderId: number | null;
  expiresAt: Date | null;
  createdAt: Date;
  isPositive: boolean;
}

/**
 * GET /api/loyalty/history
 * Get user's loyalty points transaction history
 */
async function handleGet(
  request: NextRequest,
  context: RouteContext | undefined,
  session: Session
): Promise<NextResponse<ApiSuccessResponse<LoyaltyTransaction[]> | ApiErrorResponse>> {
  const userId = session.user.id;
  const searchParams = request.nextUrl.searchParams;
  const page = parseInt(searchParams.get("page") || "1");
  const limit = parseInt(searchParams.get("limit") || "20");
  const type = searchParams.get("type") || ""; // "earn", "redeem", "expire", "adjust", "bonus"

  const skip = (page - 1) * limit;

  // Get customer loyalty record
  const loyalty = await prisma.customerLoyalty.findUnique({
    where: { userId } });

  if (!loyalty) {
    return paginatedResponse([], { page, limit, total: 0 });
  }

  const where: {
    customerLoyaltyId: number;
    type?: string;
  } = {
    customerLoyaltyId: loyalty.id };

  if (type) {
    where.type = type;
  }

  const [transactions, total] = await Promise.all([
    prisma.loyaltyTransaction.findMany({
      where,
      orderBy: { createdAt: "desc" },
      skip,
      take: limit }),
    prisma.loyaltyTransaction.count({ where }),
  ]);

  // Format transactions for display
  const formatted = transactions.map((tx) => ({
    id: tx.id,
    type: tx.type,
    points: tx.points,
    description: tx.description,
    orderId: tx.orderId,
    expiresAt: tx.expiresAt,
    createdAt: tx.createdAt,
    isPositive: tx.points > 0 }));

  return paginatedResponse(formatted, { page, limit, total });
}

export const GET = withErrorHandling(withAuth(handleGet));