const TableImporter = require('./TableImporter');
const {faker} = require('@faker-js/faker');
const {luck} = require('../utils/random');

class MembersSubscriptionCreatedEventsImporter extends TableImporter {
    static table = 'members_subscription_created_events';
    static dependencies = ['members_stripe_customers_subscriptions', 'subscriptions', 'posts'];

    constructor(knex, transaction) {
        super(MembersSubscriptionCreatedEventsImporter.table, knex, transaction);
    }

    async import(quantity) {
        const membersStripeCustomersSubscriptions = await this.transaction.select('id', 'ghost_subscription_id').from('members_stripe_customers_subscriptions');
        this.subscriptions = await this.transaction.select('id', 'created_at', 'member_id').from('subscriptions');
        this.posts = await this.transaction.select('id', 'published_at', 'visibility', 'type', 'slug').from('posts').orderBy('published_at', 'desc');

        await this.importForEach(membersStripeCustomersSubscriptions, quantity ? quantity / membersStripeCustomersSubscriptions.length : 1);
    }

    generate() {
        const subscription = this.subscriptions.find(s => s.id === this.model.ghost_subscription_id);
        let attribution = {};
        if (luck(10)) {
            const post = this.posts.find(p => p.visibility === 'public' && new Date(p.published_at) < new Date(subscription.created_at));
            if (post) {
                attribution = {
                    attribution_id: post.id,
                    attribution_type: post.type,
                    attribution_url: post.slug
                };
            }
        }
        return Object.assign({}, {
            id: faker.database.mongodbObjectId(),
            created_at: subscription.created_at,
            member_id: subscription.member_id,
            subscription_id: this.model.id,
            // TODO: Implement referrers
            referrer_source: null,
            referrer_medium: null,
            referrer_url: null
        }, attribution);
    }
}

module.exports = MembersSubscriptionCreatedEventsImporter;