import express from 'express';

import morgan from 'morgan';

import http from 'node:http';

import asyncHandler from 'express-async-handler';

import assert from 'node:assert';

import { homepage } from './constants.js';

import logger from './logger.js';

export default ({ port, onKeyboardAction }: {

port: number, onKeyboardAction: (action: string, args: unknown[]) => Promise<void>,

}) => {

const app = express();

// https://expressjs.com/en/resources/middleware/morgan.html

const morganFormat = ':remote-addr :method :url HTTP/:http-version :status - :response-time ms';

// https://stackoverflow.com/questions/27906551/node-js-logging-use-morgan-and-winston

app.use(morgan(morganFormat, {

stream: { write: (message) => logger.info(message.trim()) },

}));

const apiRouter = express.Router();

app.get('/', (_req, res) => res.send(`See ${homepage}`));

app.use('/api', apiRouter);

apiRouter.post('/action/:action', express.json(), asyncHandler(async (req, res) => {

// eslint-disable-next-line prefer-destructuring

const action = req.params['action'];

const parameters = req.body as unknown;

assert(action != null);

await onKeyboardAction(action, [parameters]);

res.end();

}));

const server = http.createServer(app);

server.on('error', (err) => logger.error('http server error', err));

const startHttpServer = async () => new Promise<void>((resolve, reject) => {

// force ipv4

const host = '127.0.0.1';

server.listen(port, host, () => {

logger.info('HTTP API listening on', `http://${host}:${port}/`);

resolve();

});

server.once('error', reject);

});

return {

startHttpServer,

};

};