const config = require('config');

exports.up = async (knex) => {
	await knex.raw(`
		CREATE MATERIALIZED VIEW releases_summaries AS (
			SELECT
				releases.id as release_id,
				channels.slug as channel_slug,
				channels.type as channel_type,
				networks.slug as network_slug,
				networks.type as network_type,
				parent_networks.slug as parent_network_slug,
				parent_networks.type as parent_network_type,
				studios.showcased IS NOT false
				AND (channels.showcased IS NOT false OR COALESCE(studios.showcased, false) = true)
				AND (networks.showcased IS NOT false OR COALESCE(channels.showcased, false) = true OR COALESCE(studios.showcased, false) = true)
				AS showcased,
				releases.effective_date,
				releases.created_at,
				array_agg(tags.slug) FILTER (WHERE tags.slug IS NOT NULL) AS tags
			FROM releases
			LEFT JOIN releases_tags ON releases_tags.release_id = releases.id
			LEFT JOIN tags ON tags.id = releases_tags.tag_id
			LEFT JOIN entities AS channels ON channels.id = releases.entity_id
			LEFT JOIN entities AS studios ON studios.id = releases.studio_id
			LEFT JOIN entities AS networks ON networks.id = channels.parent_id
			LEFT JOIN entities AS parent_networks ON parent_networks.id = networks.parent_id
			GROUP BY releases.id, studios.showcased,
			channels.showcased, channels.slug, channels.type,
			networks.showcased, networks.slug, networks.type,
			parent_networks.slug, parent_networks.type
		);

		COMMENT ON MATERIALIZED VIEW releases_summaries IS E'@foreignKey (release_id) references releases (id)';
		GRANT ALL ON ALL TABLES IN SCHEMA public TO :visitor;
	`, {
		visitor: knex.raw(config.database.query.user),
	});
};

exports.down = async (knex) => {
	await knex.raw(`
		DROP MATERIALIZED VIEW IF EXISTS releases_summaries;
	`);
};