src/server/errors.ts

import { Prisma } from "@prisma/client";
import { NextResponse } from "next/server";
import { ZodError } from "zod";

export class AppError extends Error {
  status: number;
  details?: unknown;

  constructor(message: string, status = 400, details?: unknown) {
    super(message);
    this.name = "AppError";
    this.status = status;
    this.details = details;
  }
}

export function isPrismaUniqueConstraintError(
  error: unknown,
  field?: string,
): boolean {
  if (!(error instanceof Prisma.PrismaClientKnownRequestError)) {
    return false;
  }

  if (error.code !== "P2002") {
    return false;
  }

  if (!field) {
    return true;
  }

  const target = error.meta?.target;

  return Array.isArray(target) ? target.includes(field) : false;
}

export function createRouteErrorResponse(
  error: unknown,
  fallbackMessage = "حصل خطأ، حاول تاني بعد شوية.",
) {
  if (error instanceof ZodError) {
    return NextResponse.json(
      {
        message: "البيانات اللي دخلتها محتاجة مراجعة.",
        errors: error.flatten(),
      },
      { status: 400 },
    );
  }

  if (error instanceof AppError) {
    return NextResponse.json(
      {
        message: error.message,
        details: error.details,
      },
      { status: error.status },
    );
  }

  console.error(error);

  return NextResponse.json({ message: fallbackMessage }, { status: 500 });
}