import { getAuthUserId } from '@convex-dev/auth/server';
import { ConvexError } from 'convex/values';

import type { Doc, Id } from './_generated/dataModel';
import type { MutationCtx, QueryCtx } from './_generated/server';

type Ctx = QueryCtx | MutationCtx;

export const getRequiredUserId = async (ctx: Ctx): Promise<Id<'users'>> => {
  const userId = await getAuthUserId(ctx);
  if (!userId) throw new ConvexError('Not authenticated.');
  return userId;
};

export const getOwnedSpoon = async (
  ctx: Ctx,
  spoonId: Id<'spoons'>,
  ownerId: Id<'users'>,
): Promise<Doc<'spoons'>> => {
  const spoon = await ctx.db.get(spoonId);
  if (spoon?.ownerId !== ownerId) {
    throw new ConvexError('Spoon not found.');
  }
  return spoon;
};

export const requireText = (value: string, label: string): string => {
  const trimmed = value.trim();
  if (!trimmed) throw new ConvexError(`${label} is required.`);
  return trimmed;
};

export const optionalText = (value: string | undefined) => {
  const trimmed = value?.trim();
  if (!trimmed) return undefined;
  return trimmed;
};