'use strict';

const config = require('config');
const fetch = require('node-fetch');

async function imgurImageApi(post) {
    return fetch(`https://api.imgur.com/3/image/${post.host.id}`, {
        headers: {
            Authorization: `Client-ID ${config.methods.imgur.clientId}`,
        },
    }).then(res => res.json()).then((res) => {
        if (res.status !== 200) {
            throw new Error(`Could not fetch info for imgur image '${post.host.id}': ${res.data.error}`);
        }

        return {
            album: null,
            items: [{
                id: res.data.id,
                url: res.data.animated ? res.data.mp4 : res.data.link,
                title: res.data.title,
                description: res.data.description,
                type: res.data.animated ? 'video/mp4' : res.data.type,
                datetime: new Date(res.data.datetime * 1000),
                original: res.data,
            }],
        };
    });
}

async function imgurImage(post) {
    return imgurImageApi(post);

    /*
     * as of late 2019, imgur requires log in to view albums and gallery images
    const res = await fetch(`https://imgur.com/${post.host.id}`);
    const html = await res.text();

    if (res.status !== 200) {
        if (config.methods.imgur.clientId) {
            console.log('\x1b[31m%s\x1b[0m', `Could not scrape info for imgur image '${post.host.id}' (${res.statusText}), trying API fallback (${post.permalink})`);

            return imgurImageApi(post);
        }

        throw new Error(`Could not scrape info for imgur image '${post.host.id}' (${res.statusText}), no API fallback configured`);
    }

    const dataString = html.replace(/\s+/g, ' ').match(/}}, item:(.*)}; var PREBID_TIMEOUT/)[1];
    const data = JSON.parse(dataString);

    return {
        album: null,
        items: [{
            id: data.hash,
            url: data.animated ? `https://i.imgur.com/${post.host.id}.mp4` : `https://i.imgur.com/${post.host.id}${data.ext}`,
            title: data.title,
            description: data.description,
            type: data.animated ? 'video/mp4' : data.mimetype,
            datetime: new Date(data.timestamp || data.datetime),
        }],
    };
    */
}

module.exports = imgurImage;