'use strict';

const knex = require('./knex');
const { HttpError } = require('./errors');

function curateStash(stash) {
	const curatedStash = {
		id: stash.id,
		name: stash.name,
		slug: stash.slug,
	};

	return curatedStash;
}

async function fetchStash(stashId, sessionUser) {
	if (!sessionUser) {
		throw new HttpError('You are not authenthicated', 401);
	}

	const stash = await knex('stashes')
		.where({
			id: stashId,
			user_id: sessionUser.id,
		})
		.first();

	if (!stash) {
		throw new HttpError('You are not authorized to modify this stash', 403);
	}

	return stash;
}

async function stashActor(actorId, stashId, sessionUser) {
	const stash = await fetchStash(stashId, sessionUser);

	await knex('stashes_actors')
		.insert({
			stash_id: stash.id,
			actor_id: actorId,
		});
}

async function stashScene(sceneId, stashId, sessionUser) {
	const stash = await fetchStash(stashId, sessionUser);

	await knex('stashes_scenes')
		.insert({
			stash_id: stash.id,
			scene_id: sceneId,
		});
}

async function unstashActor(actorId, stashId, sessionUser) {
	await knex
		.from('stashes_actors AS deletable')
		.where('deletable.actor_id', actorId)
		.where('deletable.stash_id', stashId)
		.whereExists(knex('stashes_actors') // verify user owns this stash
			.leftJoin('stashes', 'stashes.id', 'stashes_actors.stash_id')
			.where('stashes_actors.stash_id', knex.raw('deletable.stash_id'))
			.where('stashes.user_id', sessionUser.id))
		.delete();
}

async function unstashScene(sceneId, stashId, sessionUser) {
	await knex
		.from('stashes_scenes AS deletable')
		.where('deletable.scene_id', sceneId)
		.where('deletable.stash_id', stashId)
		.whereExists(knex('stashes_scenes') // verify user owns this stash
			.leftJoin('stashes', 'stashes.id', 'stashes_scenes.stash_id')
			.where('stashes_scenes.stash_id', knex.raw('deletable.stash_id'))
			.where('stashes.user_id', sessionUser.id))
		.delete();
}

module.exports = {
	curateStash,
	stashActor,
	stashScene,
	unstashScene,
	unstashActor,
};