"use strict";

const express = require("express");
const router = express.Router();
const { Client } = require("./Client");
const { Room } = require("./Services/Room");

const apiKeys = new Map();
const webhooks = new Map();

function auth(req, res, next) {
    const key = req.headers['x-api-key'];
    
    if (!key) {
        return res.status(401).json({ status: 'fail', message: 'API_KEY_REQUIRED' });
    }
    
    if (!apiKeys.has(key)) {
        return res.status(401).json({ status: 'fail', message: 'INVALID_API_KEY' });
    }
    
    req.server = apiKeys.get(key);
    next();
}

router.post('/auth/key', (req, res) => {
    const { domain } = req.body;
    
    if (!domain) {
        return res.json({ status: 'fail', message: 'DOMAIN_REQUIRED' });
    }
    
    const key = require("crypto").randomUUID();
    apiKeys.set(key, { domain, key });
    
    res.json({ status: 'success', key });
});

router.post('/client/:id/send', auth, (req, res) => {
    const { id } = req.params;
    const { pack } = req.body;
    
    const client = Client.clients.get(id);
    
    if (!client) {
        return res.json({ status: 'fail', message: 'CLIENT_NOT_FOUND' });
    }
    
    if (!pack) {
        return res.json({ status: 'fail', message: 'PACK_REQUIRED' });
    }
    
    const fromServer = req.server;
    client.send([{ from: 'server', fromServer, pack }, 'server/pack']);
    
    res.json({ status: 'success' });
});

router.post('/room/:id/send', auth, (req, res) => {
    const { id } = req.params;
    const { pack, wom } = req.body;
    
    const room = Room.rooms.get(id);
    
    if (!room) {
        return res.json({ status: 'fail', message: 'ROOM_NOT_FOUND' });
    }
    
    if (!pack) {
        return res.json({ status: 'fail', message: 'PACK_REQUIRED' });
    }
    
    const fromServer = req.server;
    
    room.send(
        [{ from: 'server', fromServer, pack, roomId: id }, 'server/pack/room'],
        wom ? undefined : 'server',
        () => true
    );
    
    res.json({ status: 'success' });
});

router.post('/room/create', auth, (req, res) => {
    const { name, accessType, joinType, description, credential } = req.body;
    
    if (!name) {
        return res.json({ status: 'fail', message: 'NAME_REQUIRED' });
    }
    
    for (const [, room] of Room.rooms) {
        if (room.name === name) {
            return res.json({ status: 'fail', message: 'ROOM_ALREADY_EXISTS' });
        }
    }
    
    const room = new Room();
    room.name = name;
    room.accessType = accessType || 'public';
    room.joinType = joinType || 'free';
    room.description = description || '';
    room.owner = { id: 'server', isServer: true };
    
    if (credential) {
        const { createHash } = require("crypto");
        room.credential = createHash("sha256").update(credential).digest("hex");
    }
    
    room.publish();
    
    res.json({ status: 'success', room: room.toJSON() });
});

router.post('/room/:id/join', auth, (req, res) => {
    const { id } = req.params;
    const { credential } = req.body;
    
    const room = Room.rooms.get(id);
    
    if (!room) {
        return res.json({ status: 'fail', message: 'ROOM_NOT_FOUND' });
    }
    
    if (room.joinType === 'lock') {
        return res.json({ status: 'fail', message: 'ROOM_LOCKED' });
    }
    
    if (room.joinType === 'password') {
        const { createHash } = require("crypto");
        const hash = createHash(credential || '').digest("hex");
        if (room.credential !== hash) {
            return res.json({ status: 'fail', message: 'WRONG_PASSWORD' });
        }
    }
    
    const fakeClient = {
        id: 'server-joined',
        isServer: true,
        rooms: new Set(),
        send: (msg) => {
            const fromServer = req.server;
            room.send([{ from: 'server', fromServer, ...msg[0] }, msg[1]], 'server');
        }
    };
    
    room.join(fakeClient);
    
    res.json({ status: 'success', room: room.toJSON() });
});

router.delete('/room/:id/leave', auth, (req, res) => {
    const { id } = req.params;
    
    const room = Room.rooms.get(id);
    
    if (!room) {
        return res.json({ status: 'fail', message: 'ROOM_NOT_FOUND' });
    }
    
    const fakeClient = { id: 'server-joined', isServer: true };
    room.eject(fakeClient);
    
    res.json({ status: 'success' });
});

router.get('/room/:id', (req, res) => {
    const { id } = req.params;
    
    const room = Room.rooms.get(id);
    
    if (!room) {
        return res.json({ status: 'fail', message: 'ROOM_NOT_FOUND' });
    }
    
    res.json({ status: 'success', room: room.toJSON() });
});

router.get('/rooms', (req, res) => {
    const rooms = [];
    
    for (const [id, room] of Room.rooms) {
        rooms.push({
            id,
            name: room.name,
            accessType: room.accessType,
            joinType: room.joinType,
            description: room.description,
            clientCount: room.clients.size
        });
    }
    
    res.json({ status: 'success', rooms });
});

router.get('/clients', (req, res) => {
    const clients = [];
    
    for (const [id, client] of Client.clients) {
        clients.push({
            id,
            rooms: [...client.rooms],
            pairs: [...client.pairs]
        });
    }
    
    res.json({ status: 'success', clients });
});

router.post('/webhook', auth, (req, res) => {
    const { url, events } = req.body;
    
    if (!url) {
        return res.json({ status: 'fail', message: 'URL_REQUIRED' });
    }
    
    const server = req.server;
    webhooks.set(server.domain, { url, events: events || ['server/pack', 'server/pack/room'] });
    
    res.json({ status: 'success' });
});

function triggerWebhook(event, data) {
    for (const [, webhook] of webhooks) {
        if (webhook.events.includes(event)) {
            fetch(webhook.url, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({ event, data })
            }).catch(console.error);
        }
    }
}

module.exports = router;
module.exports.triggerWebhook = triggerWebhook;