import { Router } from 'express';
import SQL from 'sql-template-strings';
import md5 from "js-md5";
import {ulid} from "ulid";
import avatar from "../avatar";
import {handleErrorAsync, now} from "../../src/helpers";
import { caches }  from "../../src/cache";
import fs from 'fs';
import { minBirthdate, maxBirthdate, formatDate, parseDate } from '../../src/birthdate';
import {socialProviders} from "../../src/socialProviders";

const normalise = s => s.trim().toLowerCase();

const calcAge = birthday => {
    if (!birthday) {
        return null;
    }

    const now = new Date();
    const birth = parseDate(birthday);

    const diff = now.getTime() - birth.getTime();

    return parseInt(Math.floor(diff / 1000 / 60 / 60 / 24 / 365.25));
}

const providersWithLinks = Object.keys(socialProviders)
    .filter(p => socialProviders[p].linkRegex !== undefined);

const verifyLinks = (links, authenticators) => {
    const verifiedLinks = {};
    for (let provider of providersWithLinks) {
        for (let a of authenticators) {
            if (a.type !== provider) { continue; }
            const regex = new RegExp(socialProviders[a.type].linkRegex(JSON.parse(a.payload)));
            for (let link of links) {
                if (link.match(regex)) {
                    verifiedLinks[link] = provider;
                }
            }
        }
    }
    return verifiedLinks;
}

const fetchProfiles = async (db, username, self) => {
    const profiles = await db.all(SQL`
        SELECT profiles.*
        FROM profiles
            LEFT JOIN users on users.id == profiles.userId 
        WHERE usernameNorm = ${normalise(username)}
        ORDER BY profiles.locale
    `);

    const linkAuthenticators = await db.all(SQL`
        SELECT a.type, a.payload
        FROM authenticators a
            LEFT JOIN users u on u.id == a.userId
        WHERE u.usernameNorm = ${normalise(username)}
        AND a.type IN (`.append(providersWithLinks.map(k => `'${k}'`).join(',')).append(SQL`)
        AND (a.validUntil IS NULL OR a.validUntil > ${now()})
    `));

    const p = {}
    for (let profile of profiles) {
        const links = JSON.parse(profile.links);
        p[profile.locale] = {
            names: JSON.parse(profile.names),
            pronouns: JSON.parse(profile.pronouns),
            description: profile.description,
            age: calcAge(profile.birthday),
            links: links,
            verifiedLinks: verifyLinks(links, linkAuthenticators),
            flags: JSON.parse(profile.flags),
            customFlags: JSON.parse(profile.customFlags),
            words: JSON.parse(profile.words),
            birthday: self ? profile.birthday : undefined,
            teamName: profile.teamName,
            footerName: profile.footerName,
            footerAreas: profile.footerAreas ? profile.footerAreas.split(',') : [],
            credentials: profile.credentials ? profile.credentials.split('|') : [],
            credentialsLevel: profile.credentialsLevel,
            credentialsName: profile.credentialsName,
            card: profile.card,
            cardDark: profile.cardDark,
        };
    }
    return p;
};

export const profilesSnapshot = async (db, username) => {
    return JSON.stringify(await fetchProfiles(db, username, true), null, 4);
}

const susRegexes = fs.readFileSync(__dirname + '/../../sus.txt').toString('utf-8').split('\n').filter(x => !!x);

function* isSuspicious(profile) {
    for (let s of [
        profile.description,
        JSON.stringify(profile.customFlags),
        JSON.stringify(profile.pronouns),
        JSON.stringify(profile.names),
        JSON.stringify(profile.words),
    ]) {
        s = s.toLowerCase().replace(/\s+/g, ' ');
        for (let sus of susRegexes) {
            let m = s.match(new RegExp(sus, 'ig'));
            if (m) {
                yield `${m[0]} (${sus})`;
            }
        }
    }
}

const hasAutomatedReports = async (db, id) => {
    return (await db.get(SQL`SELECT COUNT(*) AS c FROM reports WHERE userId = ${id} AND isAutomatic = 1`)).c > 0;
}

const router = Router();

router.get('/profile/get/:username', handleErrorAsync(async (req, res) => {
    const isSelf = req.user && req.user.username === req.params.username;
    const isAdmin = req.isGranted('users');
    const user = await req.db.get(SQL`
        SELECT
            users.id,
            users.username,
            users.email,
            users.avatarSource,
            users.bannedReason,
            users.bannedTerms,
            users.roles != '' AS team
        FROM users
        WHERE users.usernameNorm = ${normalise(req.params.username)}
    `);

    if (!user || (user.bannedReason !== null && !isAdmin && !isSelf)) {
        return res.json({
            profiles: {},
        });
    }

    user.emailHash = md5(user.email);
    delete user.email;
    user.avatar = await avatar(req.db, user);

    user.bannedTerms = user.bannedTerms ? user.bannedTerms.split(',') : [];

    return res.json({
        ...user,
        profiles: await fetchProfiles(req.db, req.params.username, isSelf),
    });
}));

const sanitiseBirthday = (bd) => {
    if (!bd) { return null; }
    const match = bd.match(/^(\d\d\d\d)-(\d\d)-(\d\d)$/);
    if (!match) { return null; }

    bd = new Date(parseInt(match[1]), parseInt(match[2]) - 1, parseInt(match[3]));
    if (bd < minBirthdate || bd > maxBirthdate) {
        return null;
    }

    return formatDate(bd);
}

router.post('/profile/save', handleErrorAsync(async (req, res) => {
    if (!req.user) {
        return res.status(401).json({error: 'Unauthorised'});
    }

    // TODO just make it a transaction...
    const ids = (await req.db.all(SQL`SELECT * FROM profiles WHERE userId = ${req.user.id} AND locale = ${global.config.locale}`)).map(row => row.id);
    if (ids.length) {
        await req.db.get(SQL`UPDATE profiles
            SET
                names = ${JSON.stringify(req.body.names)},
                pronouns = ${JSON.stringify(req.body.pronouns)},
                description = ${req.body.description},
                birthday = ${sanitiseBirthday(req.body.birthday || null)},
                links = ${JSON.stringify(req.body.links.filter(x => !!x))},
                flags = ${JSON.stringify(req.body.flags)},
                customFlags = ${JSON.stringify(req.body.customFlags)},
                words = ${JSON.stringify(req.body.words)},
                teamName = ${req.isGranted() ? req.body.teamName || null : ''},
                footerName = ${req.isGranted() ? req.body.footerName || null : ''},
                footerAreas = ${req.isGranted() ? req.body.footerAreas.join(',') || null : ''},
                credentials = ${req.isGranted() ? req.body.credentials.join('|') || null : null},
                credentialsLevel = ${req.isGranted() ? req.body.credentialsLevel || null : null},
                credentialsName = ${req.isGranted() ? req.body.credentialsName || null : null},
                card = NULL,
                cardDark = NULL
            WHERE id = ${ids[0]}
        `);
    } else {
        await req.db.get(SQL`INSERT INTO profiles (id, userId, locale, names, pronouns, description, birthday, links, flags, customFlags, words, active, teamName, footerName, footerAreas)
            VALUES (${ulid()}, ${req.user.id}, ${global.config.locale}, ${JSON.stringify(req.body.names)}, ${JSON.stringify(req.body.pronouns)},
                ${req.body.description}, ${sanitiseBirthday(req.body.birthday || null)}, ${JSON.stringify(req.body.links.filter(x => !!x))}, ${JSON.stringify(req.body.flags)}, ${JSON.stringify(req.body.customFlags)},
                ${JSON.stringify(req.body.words)}, 1,
                ${req.isGranted() ? req.body.teamName || null : ''},
                ${req.isGranted() ? req.body.footerName || null : ''},
                ${req.isGranted() ? req.body.footerAreas.join(',') || null : ''}
        )`);
    }

    if ((req.body.propagate || []).includes('teamName')) {
        await req.db.get(SQL`UPDATE profiles
            SET teamName = ${req.isGranted() ? req.body.teamName || null : ''}
            WHERE userId = ${req.user.id} AND teamName != '' AND teamName IS NOT NULL;
        `);
    }

    if ((req.body.propagate || []).includes('footerName')) {
        await req.db.get(SQL`UPDATE profiles
            SET footerName = ${req.isGranted() ? req.body.footerName || null : ''}
            WHERE userId = ${req.user.id} AND footerName != '' AND footerName IS NOT NULL;
        `);
    }

    if ((req.body.propagate || []).includes('names')) {
        await req.db.get(SQL`UPDATE profiles
            SET names = ${JSON.stringify(req.body.names)}
            WHERE userId = ${req.user.id};
        `);
    }

    if ((req.body.propagate || []).includes('flags')) {
        await req.db.get(SQL`UPDATE profiles
            SET flags = ${JSON.stringify(req.body.flags)}
            WHERE userId = ${req.user.id};
        `);
    }

    if ((req.body.propagate || []).includes('customFlags')) {
        await req.db.get(SQL`UPDATE profiles
            customFlags = ${JSON.stringify(req.body.customFlags)}
            WHERE userId = ${req.user.id};
        `);
    }

    if ((req.body.propagate || []).includes('links')) {
        await req.db.get(SQL`UPDATE profiles
            SET links = ${JSON.stringify(req.body.links.filter(x => !!x))}
            WHERE userId = ${req.user.id};
        `);
    }

    if ((req.body.propagate || []).includes('links')) {
        await req.db.get(SQL`UPDATE profiles
            SET links = ${JSON.stringify(req.body.links.filter(x => !!x))}
            WHERE userId = ${req.user.id};
        `);
    }

    if ((req.body.propagate || []).includes('birthday')) {
        await req.db.get(SQL`UPDATE profiles
            SET birthday = ${sanitiseBirthday(req.body.birthday || null)}
            WHERE userId = ${req.user.id};
        `);
    }

    const sus = [...isSuspicious(req.body)];
    if (sus.length && !await hasAutomatedReports(req.db, req.user.id)) {
        await req.db.get(SQL`
            INSERT INTO reports (id, userId, reporterId, isAutomatic, comment, isHandled)
            VALUES (${ulid()}, ${req.user.id}, null, 1, ${sus.join(', ')}, 0);
        `);
    }

    if (req.body.teamName) {
        await caches.admins.invalidate();
        await caches.adminsFooter.invalidate();
    }

    return res.json(await fetchProfiles(req.db, req.user.username, true));
}));

router.post('/profile/delete/:locale', handleErrorAsync(async (req, res) => {
    await req.db.get(SQL`DELETE FROM profiles WHERE userId = ${req.user.id} AND locale = ${req.params.locale}`);

    return res.json(await fetchProfiles(req.db, req.user.username, true));
}));

router.post('/profile/report/:username', handleErrorAsync(async (req, res) => {
    const user = await req.db.get(SQL`SELECT id FROM users WHERE usernameNorm = ${normalise(req.params.username)}`);
    if (!user) {
        return res.status(400).json({error: 'Missing user'});
    }
    if (!req.body.comment) {
        return res.status(400).json({error: 'Missing comment'});
    }

    await req.db.get(SQL`
        INSERT INTO reports (id, userId, reporterId, isAutomatic, comment, isHandled, snapshot)
        VALUES (${ulid()}, ${user.id}, ${req.user.id}, 0, ${req.body.comment}, 0, ${await profilesSnapshot(req.db, normalise(req.params.username))});
    `);

    return res.json('OK');
}));

router.post('/profile/request-card', handleErrorAsync(async (req, res) => {
    if (!req.user) {
        return res.status(400).json({error: 'Missing user'});
    }

    if (req.query.dark === '1') {
        await req.db.get(SQL`
            UPDATE profiles
            SET cardDark = ''
            WHERE userId=${req.user.id} AND locale=${global.config.locale} AND cardDark IS NULL 
        `);
    } else {
        await req.db.get(SQL`
            UPDATE profiles
            SET card = ''
            WHERE userId=${req.user.id} AND locale=${global.config.locale} AND card IS NULL 
        `);
    }

    return res.json('OK');
}));

router.get('/profile/has-card', handleErrorAsync(async (req, res) => {
    if (!req.user) {
        return res.status(400).json({error: 'Missing user'});
    }

    const card = await req.db.get(SQL`
        SELECT card, cardDark
        FROM profiles
        WHERE userId=${req.user.id} AND locale=${global.config.locale}
    `);

    return res.json(card);
}));

export default router;