'use strict';

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

const logger = require('../logger')(__filename);

async function imgurAlbumApi(host, post) {
    const res = await fetch(`https://api.imgur.com/3/album/${host.id}`, {
        headers: {
            Authorization: `Client-ID ${config.methods.imgur.clientId}`,
        },
    });

    const { data } = await res.json();

    if (res.status !== 200) {
        throw new Error(`Could not fetch info for imgur album '${host.id}': ${res.data.error}`);
    }

    const extract = config.library.extractSingleAlbumItem && data.images.length === 1;

    if (extract) {
        logger.verbose(`Extracting single item from album '${data.link}' (${post ? post.url : 'no post'})`);
    }

    return {
        album: extract ? null : {
            id: data.id,
            url: data.link,
            title: data.title,
            description: data.description,
            datetime: new Date(data.datetime * 1000),
            original: data,
        },
        items: data.images.map(item => ({
            extracted: extract,
            id: item.id,
            url: item.animated ? item.mp4 : item.link,
            title: item.title || data.title || null,
            description: item.description || data.description || null,
            type: item.animated ? 'video/mp4' : item.type,
            datetime: item.datetime * 1000,
            original: item,
        })),
    };
}

module.exports = imgurAlbumApi;