import { Request, Response, NextFunction } from 'express';

import { Prisma } from '@prisma/client' // Bleh

import { isDomainError } from "@app/lib/errors/base";

export const errorHandler = (

  err: unknown,

  _req: Request,

  res: Response,

  _next: NextFunction

) => {

  // TODO: Rig some improved, centralized error logging here

  console.error(`[ErrorHandler]: ${err}`);

  if (isDomainError(err)) {

    return res.status(err.status)

      .json({ error: err.message });

  }

  // Prisma errors as a fallback (or map these to domain errors in the repo)

  if (err instanceof Prisma.PrismaClientKnownRequestError) {

    if (err.code === "P2025") return res.status(404)

      .json({ error: "Record not found" });

    if (err.code === "P2002") return res.status(409)

      .json({ error: "Unique constraint violation" });

  }

  res.status(500).json({ error: "Internal server error" });

}