import knex from './knex';

function curateDatabaseShelf(shelf) {
	if (!shelf) {
		return null;
	}

	return {
		id: shelf.id,
		slug: shelf.slug,
		name: shelf.slug,
	};
}

async function fetchShelf(shelfId) {
	const shelfEntry = await knex('shelves')
		.where((builder) => {
			const id = Number(shelfId);

			if (Number.isNaN(id)) {
				builder.where('slug', shelfId);
				return;
			}

			builder.where('id', shelfId);
		})
		.first();

	return curateDatabaseShelf(shelfEntry);
}

async function fetchShelves({ limit = 10 } = {}) {
	const shelfEntries = await knex('shelves').limit(limit);

	return shelfEntries.map((shelfEntry) => curateDatabaseShelf(shelfEntry));
}

async function createShelf(shelf, user) {
	const shelfEntry = await knex('shelves')
		.insert({
			slug: shelf.slug,
			founder_id: user.id,
		})
		.returning('*');

	console.log('entry', shelfEntry);

	return curateDatabaseShelf(shelfEntry);
}

export {
	fetchShelf,
	fetchShelves,
	createShelf,
	curateDatabaseShelf,
};