import type { RequestHandler } from './$types';
import { json, error } from '@sveltejs/kit';
import { z } from 'zod';
import { getDb } from '$lib/server/db';
import { deleteRecipe, getRecipeById } from '$lib/server/recipes/repository';
import {
  listComments,
  listCookingLog,
  listRatings,
  renameRecipe
} from '$lib/server/recipes/actions';

const RenameSchema = z.object({ title: z.string().min(1).max(200) });

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

export const GET: RequestHandler = async ({ params }) => {
  const id = parseId(params.id!);
  const db = getDb();
  const recipe = getRecipeById(db, id);
  if (!recipe) error(404, { message: 'Recipe not found' });
  const ratings = listRatings(db, id);
  const comments = listComments(db, id);
  const cooking_log = listCookingLog(db, id);
  const avg_stars =
    ratings.length === 0 ? null : ratings.reduce((s, r) => s + r.stars, 0) / ratings.length;
  return json({ recipe, ratings, comments, cooking_log, avg_stars });
};

export const PATCH: RequestHandler = async ({ params, request }) => {
  const id = parseId(params.id!);
  const body = await request.json().catch(() => null);
  const parsed = RenameSchema.safeParse(body);
  if (!parsed.success) error(400, { message: 'Invalid body' });
  renameRecipe(getDb(), id, parsed.data.title);
  return json({ ok: true });
};

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