module.exports = apex => {
    const constant = require("./constant"),
        urlToId = url => {
            try {
                if (typeof new URL(url) === 'object' && url.split('/').length === 5 && url.split('/')[3].length > 0) {
                    return '@' + url.split('/')[4] + '@' + url.split('/')[2]
                } else {
                    return url
                }
            } catch (e) {
                return url
            }
        },
        sendFederatedMessage = async (id, summary, message, recipient, reply) => {
            const users = message.split(' ').filter(token => token.startsWith('@') && token.split('@').length === 3)
                .map(token => `https://${token.split('@')[2]}/users/${token.split('@')[1]}`),
                mentions = message.split(' ').filter(token => token.startsWith('@') && token.split('@').length === 3)
                    .map(token => { return { type: 'Mention', href: `https://${token.split('@')[2]}/users/${token.split('@')[1]}`, name: `@${token.split('@')[1]}` } }),
                hashtags = message.split(' ').filter(token => token.startsWith('#'))
                    .map(token => { return { id: `https://${constant.apexdomain}/tags/${token.split('#')[1]}`, name: token } }),
                images = message.split(' ').filter(token => token.match(/^https?:\/\//i) && token.match(/\.(jpg|png|gif|jpeg|ppm)$/i))
                    .map(token => { return { type: 'Image', url: token } }),
                audio = message.split(' ').filter(token => token.match(/^https?:\/\//i) && token.match(/\.(mp3|wav|flac)$/i))
                    .map(token => { return { type: 'Audio', url: token } }),
                video = message.split(' ').filter(token => token.match(/^https?:\/\//i) && token.match(/\.(mp4|flv|avi)$/i))
                    .map(token => { return { type: 'Video', url: token } }),
                links = message.split(' ').filter(token => token.match(/^https?:\/\//i) && !images.concat(audio).concat(video)
                    .some(link => link.url === token)).map(token => { return { type: 'Link', href: token } }),
                allusers = users.concat([recipient || (await apex.store.getObject(apex.utils.usernameToIRI(id), true)).followers[0]]),
                act = await apex.buildActivity('Create', apex.utils.usernameToIRI(id), ['https://www.w3.org/ns/activitystreams#Public'].concat(allusers), {
                    object: {
                        type: 'Note',
                        name: `Fediblock Instance`,
                        summary: summary || null,
                        content: `<p>${message.replace(/(\b(https?|ftp|file):\/\/([-A-Z0-9+&@#%?=~_|!:,.;]*)([-A-Z0-9+&@#%?/=~_|!:,.;]*))/ig,
                            '<a href="$1" target="_blank">$3</a>').replace(/\s#(\S+)/g, '<a href="https://mastodon.social/tags/$1">#$1</a>').replace(/\r?\n/g, '<br />')}</p>`,
                        tag: hashtags.concat(mentions),
                        attachment: images.concat(links).concat(audio).concat(video),
                        inReplyTo: reply || null
                    }
                })
            act.object[0].id = act.id
            await apex.addToOutbox(await apex.store.getObject(apex.utils.usernameToIRI(id), true), act)
        }
    return { urlToId, sendFederatedMessage }
}