'use strict';

const config = require('config');
const Promise = require('bluebird');
const UrlPattern = require('url-pattern');

const interpolate = require('../interpolate');
const fetchItem = require('../fetch/item');
// const textToStream = require('./textToStream');
const save = require('./save');
const logger = require('../logger')(__filename);

async function saveProfileImage(user, args) {
    if (!args.redownloadProfile && user.indexed.profile.image) {
        logger.verbose(`Ignoring already present profile image for '${user.name}' (https://reddit.com/user/${user.name})`);

        return user.indexed.profile.image;
    }

    if (config.library.profile.image && !user.fallback && !user.deleted) {
        const image = user.profile ? user.profile.image : user.image;

        if (config.library.profile.avoidAvatar && new UrlPattern('http(s)\\://(www.)redditstatic.com/avatars/:id(.:ext)(?:query)').match(image)) {
            logger.verbose(`Ignoring standard avatar profile image for '${user.name}' (https://reddit.com/user/${user.name})`);

            return null;
        }

        const filepath = interpolate(
            config.library.profile.image,
            {
            // pass profile image as item to interpolate extension variable
                url: image,
            },
            null,
            null,
            null,
            user,
        );

        try {
            const { protocol, hostname, pathname } = new URL(image);
            const stream = await fetchItem(`${protocol}//${hostname}${pathname}`, 0, { permalink: `https://reddit.com/user/${user.name}` });
            const targets = await save(filepath, stream);

            return targets[0];
        } catch (error) {
            logger.warn(`Could not save profile image for '${user.name}': ${error} (https://reddit.com/user/${user.name})`);

            return null;
        }
    }

    return null;
}

async function saveProfileDescription(user, args) {
    if (!args.redownloadProfile && user.indexed.profile.description) {
        logger.verbose(`Ignoring already present profile description for '${user.name}' (https://reddit.com/user/${user.name})`);

        return user.indexed.profile.description;
    }

    if (config.library.profile.description && !user.fallback && !user.deleted) {
        if (user.profile && user.profile.description) {
            const filepath = interpolate(config.library.profile.description, null, null, null, null, user);
            const stream = Buffer.from(user.profile.description, 'utf8');

            try {
                const targets = await save(filepath, stream);

                return targets[0];
            } catch (error) {
                logger.error(`Could not save profile description for '${user.name}': ${error} (https://reddit.com/user/${user.name})`);

                return null;
            }
        }

        logger.verbose(`No profile description for '${user.name}' (https://reddit.com/user/${user.name})`);

        return null;
    }

    return null;
}

async function saveProfileDetails(user, args) {
    const [image, description] = await Promise.all([saveProfileImage(user, args), saveProfileDescription(user, args)]);

    return { image, description };
}

module.exports = saveProfileDetails;