import { readFile } from "fs/promises";


var illegalRe = /[\/\?<>\\:\*\|":]/g;
var controlRe = /[\x00-\x1f\x80-\x9f]/g;
var reservedRe = /^\.+$/;
var windowsReservedRe = /^(con|prn|aux|nul|com[0-9]|lpt[0-9])(\..*)?$/i;

function sanitize(input, replacement) {
    var sanitized = input
        .replace(illegalRe, replacement)
        .replace(controlRe, replacement)
        .replace(reservedRe, replacement)
        .replace(windowsReservedRe, replacement);
    return sanitized.slice(0, 200);
}

async function importRouters(app, routers) {
    for (let router in routers) {
        await app.use(router, (await import(routers[router])).default)
    }
}

function apiStat(res, next, message, success = false, redirect = '/') {
    res.api = { success, message, redirect };
    next();
}

async function splitUp(content) {
    let out = content.split(/(\s+)/g);

    for (let i in out) {
        let res = out[i];
        if (res.startsWith('file::')) {
            let ext = res.split('.').pop();
            let content = '';
            let path = new URL(res.slice('file::'.length), 'https://tbg.dervland.net/').pathname;
            if (ext == 'txt' || ext == 'json') {
                let san = sanitize(path.split('/').pop(), '');
                content = await readFile(`${process.cwd()}/uploads/${san}`, 'utf-8');
            }

            let contentJson = {};
            let width = 0;
            let height = 0;

            try {
                contentJson = JSON.parse(content)
            } catch (err) {
                contentJson = {};
            }

            if (contentJson.pal) {
                ext = '!neoboxels';
                console.log(Object.keys(contentJson))
                width = contentJson.width * 4;
                height = contentJson.height *4;
            }

            out[i] = { type: 'file', path, ext, content, width, height };
            continue;
        }
        if (res.startsWith('https://')) {
            out[i] = { type: 'link', name: res, href: res };
            continue;
        }
        let href = "";
        if (res[0] == '@' || res[0] == '#') {
            let type = res[0] == '@' ? '/users/' : '/walls/get/hub/';
            let type2 = res[0] == '@' ? '' : '/0';
            href = new URL(type + res.slice(1) + type2, 'https://tbg.dervland.net/').pathname
        }
        if (res[0] == '@') {
            out[i] = { type: 'link', name: res, href };
            continue;
        }
        if (res[0] == '#') {
           out[i] = { type: 'link', name: res, href };
            continue;
        }
        out[i] = {type: 'normal', data: res};
    }
    return out;
}

async function replyIterator(replies, db) {
    for (let reply of replies) {
        if (reply.childType == 'hub') {
            reply.comment = { type: reply.childType, id: reply.childId, content: `The ${reply.childId} hub.`, username: false, date: undefined };
            continue;
        } else if (reply.childType == 'users') {
            reply.comment = { type: reply.childType, id: reply.childId, content: `User ${reply.childId}'s wall.`, username: false, date: undefined };
            continue;
        }

        let dat = await db.all('SELECT * FROM comment WHERE id = ?', [
            reply.childId
        ]);

        if (reply.childType != 'comment' || dat.length < 1) {
            reply.comment = 'fail';
            continue;
        }
        reply.comment = dat[0];
        reply.comment.type = reply.childType;
        //reply.comment.id = reply.childId;
    }
    for (let reply of replies) {
        reply.comment.content = await splitUp(reply.comment.content)
    }
    return replies;
}

export { importRouters, apiStat, replyIterator, splitUp };