import type { FastifyRequest } from 'fastify';
import { z } from 'zod';
import { badRequest, unauthorized } from '../errors.js';
import type { ActionContext } from '../services/audit.js';

// z.output statt z.input: nur so zaehlen .default()-Werte als gesetzt.
export function parseWith<S extends z.ZodTypeAny>(schema: S, input: unknown): z.output<S> {
  const result = schema.safeParse(input);
  if (!result.success) {
    const message = result.error.issues
      .map((issue) => {
        const path = issue.path.join('.');
        return path ? `${path}: ${issue.message}` : issue.message;
      })
      .join('; ');
    throw badRequest('VALIDATION_FAILED', message);
  }
  return result.data;
}

export function contextOf(request: FastifyRequest): ActionContext {
  if (!request.user) throw unauthorized();
  return {
    actorId: request.user.id,
    actorName: request.user.username,
    ip: request.ip,
  };
}

export const idParam = z.object({ id: z.coerce.number().int().positive() });

export const optionalNote = z.string().trim().max(500).optional();