import type { RequestHandler } from './$types';
import { json, error } from '@sveltejs/kit';
import { z } from 'zod';
import { getDb } from '$lib/server/db';
import {
  removeDomain,
  updateDomain,
  setDomainFavicon
} from '$lib/server/domains/repository';
import { fetchAndStoreFavicon } from '$lib/server/domains/favicons';

const IMAGE_DIR = process.env.IMAGE_DIR ?? './data/images';

const UpdateSchema = z.object({
  domain: z.string().min(3).max(253).optional(),
  display_name: z.string().max(100).nullable().optional()
});

function parseId(raw: string): number {
  const id = Number(raw);
  if (!Number.isInteger(id) || id <= 0) error(400, { message: 'Invalid id' });
  return id;
}

export const PATCH: RequestHandler = async ({ params, request }) => {
  const id = parseId(params.id!);
  const body = await request.json().catch(() => null);
  const parsed = UpdateSchema.safeParse(body);
  if (!parsed.success) error(400, { message: 'Invalid body' });
  try {
    const db = getDb();
    const updated = updateDomain(db, id, parsed.data);
    if (!updated) error(404, { message: 'Not found' });
    // Wenn updateDomain favicon_path genullt hat (Domain geändert), frisch laden.
    if (updated.favicon_path === null) {
      const path = await fetchAndStoreFavicon(updated.domain, IMAGE_DIR);
      if (path) {
        setDomainFavicon(db, updated.id, path);
        updated.favicon_path = path;
      }
    }
    return json(updated);
  } catch (e) {
    error(409, { message: (e as Error).message });
  }
};

export const DELETE: RequestHandler = async ({ params }) => {
  const id = parseId(params.id!);
  removeDomain(getDb(), id);
  return json({ ok: true });
};