'use strict';

const config = require('config');
const Promise = require('bluebird');

// const logger = require('./logger')(__filename);
const knex = require('./knex');
const scrapers = require('./scrapers/scrapers');

const argv = require('./argv');
const slugify = require('./utils/slugify');
const capitalize = require('./utils/capitalize');

function toBaseActors(actorsOrNames, release) {
	return actorsOrNames.map((actorOrName) => {
		const name = capitalize(actorOrName.name || actorOrName);
		const slug = slugify(name);

		const baseActor = {
			name,
			slug,
			network: release?.site.network,
		};

		if (actorOrName.name) {
			return {
				...actorOrName,
				...baseActor,
			};
		}

		return baseActor;
	});
}

function curateActorEntry(baseActor, batchId) {
	return {
		name: baseActor.name,
		slug: baseActor.slug,
		network_id: null,
		batch_id: batchId,
	};
}

function curateActorEntries(baseActors, batchId) {
	return baseActors.map(baseActor => curateActorEntry(baseActor, batchId));
}

async function scrapeActors(actorNames) {
	const baseActors = toBaseActors(actorNames);

	const sources = argv.sources || config.profiles || Object.keys(scrapers.actors);
	const siteSlugs = sources.flat();

	const [networks, sites, existingActorEntries] = await Promise.all([
		knex('networks').whereIn('slug', siteSlugs),
		knex('sites').whereIn('slug', siteSlugs),
		knex('actors')
			.select(['id', 'name', 'slug'])
			.whereIn('slug', baseActors.map(baseActor => baseActor.slug))
			.whereNull('network_id'),
	]);

	const existingActorEntriesBySlug = existingActorEntries.reduce((acc, actorEntry) => ({ ...acc, [actorEntry.slug]: actorEntry }), {});
	const networksBySlug = networks.reduce((acc, network) => ({ ...acc, [network.slug]: { ...network, isNetwork: true } }), {});
	const sitesBySlug = sites.reduce((acc, site) => ({ ...acc, [site.slug]: site }), {});

	const newBaseActors = baseActors.filter(baseActor => !existingActorEntriesBySlug[baseActor.slug]);

	const [batchId] = newBaseActors.length > 0 ? await knex('batches').insert({ comment: null }).returning('id') : [null];
	const curatedActorEntries = batchId && curateActorEntries(newBaseActors, batchId);
	const newActorEntries = batchId && await knex('actors').insert(curatedActorEntries).returning(['id', 'name', 'slug']);

	const actorEntries = existingActorEntries.concat(Array.isArray(newActorEntries) ? newActorEntries : []);

	console.log(actorEntries, newActorEntries, actorEntries);
}

async function getOrCreateActors(baseActors, batchId) {
	const existingActors = await knex('actors')
		.select('id', 'alias_for', 'name', 'slug', 'network_id')
		.whereIn('slug', baseActors.map(baseActor => baseActor.slug))
		.whereNull('network_id')
		.orWhereIn(['slug', 'network_id'], baseActors.map(baseActor => [baseActor.slug, baseActor.network.id]));

	// const existingActorSlugs = new Set(existingActors.map(actor => actor.slug));
	const existingActorSlugs = existingActors.reduce((acc, actor) => ({
		...acc,
		[actor.network_id]: {
			...acc[actor.network_id],
			[actor.slug]: true,
		},
	}), {});

	const uniqueBaseActors = baseActors.filter(baseActor => !existingActorSlugs[baseActor.network.id]?.[baseActor.slug] && !existingActorSlugs.null?.[baseActor.slug]);

	const curatedActorEntries = curateActorEntries(uniqueBaseActors, batchId);
	const newActors = await knex('actors').insert(curatedActorEntries, ['id', 'alias_for', 'name', 'slug', 'network_id']);

	if (Array.isArray(newActors)) {
		return newActors.concat(existingActors);
	}

	return existingActors;
}

async function associateActors(releases, batchId) {
	const baseActorsByReleaseId = releases.reduce((acc, release) => {
		if (release.actors) {
			acc[release.id] = toBaseActors(release.actors, release);
		}

		return acc;
	}, {});

	const baseActors = Object.values(baseActorsByReleaseId).flat();

	if (baseActors.length === 0) {
		return;
	}

	const baseActorsBySlugAndNetworkId = baseActors.reduce((acc, baseActor) => ({
		...acc,
		[baseActor.slug]: {
			...acc[baseActor.slug],
			[baseActor.network.id]: baseActor,
		},
	}), {});

	const uniqueBaseActors = Object.values(baseActorsBySlugAndNetworkId).map(baseActorsByNetworkId => Object.values(baseActorsByNetworkId)).flat();

	const actors = await getOrCreateActors(uniqueBaseActors, batchId);

	const actorIdsBySlugAndNetworkId = actors.reduce((acc, actor) => ({
		...acc,
		[actor.network_id]: {
			...acc[actor.network_id],
			[actor.slug]: actor.alias_for || actor.id,
		},
	}), {});

	const releaseActorAssociations = Object.entries(baseActorsByReleaseId)
		.map(([releaseId, releaseActors]) => releaseActors
			.map(releaseActor => ({
				release_id: releaseId,
				actor_id: actorIdsBySlugAndNetworkId[releaseActor.network.id]?.[releaseActor.slug] || actorIdsBySlugAndNetworkId.null[releaseActor.slug],
			})))
		.flat();

	await knex.raw(`${knex('releases_actors').insert(releaseActorAssociations).toString()} ON CONFLICT DO NOTHING;`);
}

module.exports = {
	associateActors,
	scrapeActors,
};