import dotenv from 'dotenv'
dotenv.config({
    path: '../../.env'
})
import twitter from './twitter.js'
import fansly from './fansly.js'


/**
 * Acquire a vtuber image from the www
 * 
 * Sources preference
 *   1. Twitter
 *   2. Fansly
 * 
 * Our task is to download an avatar image of the vtuber. 
 * A slug is good for pulling a record from the database. From there, we can see any social medias such as Twitter or Fansly.
 * Twitter is preferred.
 * 
 * We depend on one of these social media URLs. If there is neither Twitter or fansly listed, we throw an error. 
 * 
 * @param {Object} limiter      -- instance of node-rate-limiter
 * @param {Object} vtuber       -- vtuber instance from strapi
 * @returns {String} filePath   -- path on disk where the image was saved
 */
export async function getImage(limiter, vtuber) {
    if (!limiter) throw new Error('first arg must be node-rate-limiter instace');
    if (!vtuber) throw new Error('second arg must be vtuber instance');
    await limiter.removeTokens(1);
    
    const { twitter: twitterUrl, fanslyId: fanslyId } = vtuber.attributes
    const twitterUsername = twitterUrl && twitter.regex.username.exec(twitterUrl).at(1)

    let img;
    if (twitterUrl) {
        img = await twitter.data.image(limiter, twitterUsername)
    } else if (fanslyId) {
        img = await fansly.data.image(limiter, fanslyId)
    } else {
        const msg = 'while attempting to get vtuber image, there was neither twitter nor fansly listed. One of these must exist for us to download an image.'
        console.error(msg)
        throw new Error(msg)
    }
    return img
    
}