'use strict';

const knex = require('./knex');
const whereOr = require('./utils/where-or');

async function curateRelease(release) {
    const [actors, tags, media] = await Promise.all([
        knex('actors_associated')
            .select('actors.id', 'actors.name', 'actors.gender', 'actors.slug')
            .where({ release_id: release.id })
            .leftJoin('actors', 'actors.id', 'actors_associated.actor_id'),
        knex('tags_associated')
            .select('tags.name', 'tags.slug')
            .where({ release_id: release.id })
            .leftJoin('tags', 'tags.id', 'tags_associated.tag_id')
            .orderBy('tags.priority', 'desc'),
        knex('media')
            .where({ target_id: release.id })
            .orderBy('role'),
    ]);

    return {
        id: release.id,
        title: release.title,
        date: release.date,
        dateAdded: release.created_at,
        description: release.description,
        url: release.url,
        shootId: release.shoot_id,
        entryId: release.entry_id,
        actors,
        director: release.director,
        tags,
        duration: release.duration,
        photos: media.filter(item => item.role === 'photo'),
        poster: media.filter(item => item.role === 'poster')[0],
        trailer: media.filter(item => item.role === 'trailer')[0],
        rating: {
            likes: release.likes,
            dislikes: release.dislikes,
            stars: release.stars,
        },
        site: {
            id: release.site_id,
            name: release.site_name,
            independent: release.site_parameters
                ? (JSON.parse(release.site_parameters).independent || false)
                : false,
            slug: release.site_slug,
            url: release.site_url,
        },
        studio: release.studio_id
            ? {
                id: release.studio_id,
                name: release.studio_name,
                slug: release.studio_slug,
                url: release.studio_url,
            }
            : null,
        network: {
            id: release.network_id,
            name: release.network_name,
            description: release.network_description,
            slug: release.network_slug,
            url: release.network_url,
        },
    };
}

function curateReleases(releases) {
    return Promise.all(releases.map(async release => curateRelease(release)));
}

function commonQuery(queryBuilder, {
    filter = [],
    after = new Date(0), // January 1970
    before = new Date(2 ** 44), // May 2109
    limit = 100,
}) {
    const finalFilter = [].concat(filter); // ensure filter is array

    queryBuilder
        .leftJoin('sites', 'releases.site_id', 'sites.id')
        .leftJoin('studios', 'releases.studio_id', 'studios.id')
        .leftJoin('networks', 'sites.network_id', 'networks.id')
        .select(
            'releases.*',
            'sites.name as site_name', 'sites.slug as site_slug', 'sites.url as site_url', 'sites.network_id', 'sites.parameters as site_parameters',
            'studios.name as studio_name', 'sites.slug as site_slug', 'studios.url as studio_url',
            'networks.name as network_name', 'networks.slug as network_slug', 'networks.url as network_url', 'networks.description as network_description',
        )
        .whereNotExists((builder) => {
            // apply tag filters
            builder
                .select('*')
                .from('tags_associated')
                .leftJoin('tags', 'tags_associated.tag_id', 'tags.id')
                .whereIn('tags.slug', finalFilter)
                .andWhereRaw('tags_associated.release_id = releases.id');
        })
        .andWhere('date', '>', after)
        .andWhere('date', '<=', before)
        .orderBy([{ column: 'date', order: 'desc' }, { column: 'created_at', order: 'desc' }])
        .limit(limit);
}

async function fetchReleases(queryObject = {}, options = {}) {
    const releases = await knex('releases')
        .modify(commonQuery, options)
        .andWhere(builder => whereOr(queryObject, 'releases', builder));

    return curateReleases(releases);
}

async function fetchSiteReleases(queryObject, options = {}) {
    const releases = await knex('releases')
        .modify(commonQuery, options)
        .where(builder => whereOr(queryObject, 'sites', builder));

    return curateReleases(releases);
}

async function fetchNetworkReleases(queryObject, options = {}) {
    const releases = await knex('releases')
        .modify(commonQuery, options)
        .where(builder => whereOr(queryObject, 'networks', builder));

    return curateReleases(releases);
}

async function fetchActorReleases(queryObject, options = {}) {
    const releases = await knex('actors_associated')
        .leftJoin('releases', 'actors_associated.release_id', 'releases.id')
        .leftJoin('actors', 'actors_associated.actor_id', 'actors.id')
        .select(
            'actors.name as actor_name',
        )
        .modify(commonQuery, options)
        .where(builder => whereOr(queryObject, 'actors', builder));

    return curateReleases(releases);
}

async function fetchTagReleases(queryObject, options = {}) {
    const releases = await knex('tags_associated')
        .leftJoin('releases', 'tags_associated.release_id', 'releases.id')
        .leftJoin('tags', 'tags_associated.tag_id', 'tags.id')
        .select(
            'tags.name as tag_name',
        )
        .modify(commonQuery, options)
        .where(builder => whereOr(queryObject, 'tags', builder));

    return curateReleases(releases);
}

module.exports = {
    fetchReleases,
    fetchActorReleases,
    fetchSiteReleases,
    fetchNetworkReleases,
    fetchTagReleases,
};