const Hyperswarm = require('hyperswarm')
const crypto = require('hypercore-crypto')
const b4a = require('b4a')
const readline = require('readline')
const fs = require("fs");
const { login } = require('./commands/login');
const { execute } = require('./commands/exec');
const { stop } = require('./commands/stop');
const { start } = require('./commands/start');
const { restart } = require('./commands/restart');
const { stats } = require('./commands/stats');
const { changeDir } = require('./commands/cd');
const { AIRequest } = require('./commands/AI');

let rand = Math.floor(Math.random() * 99999).toString();

let USERPWD = "/"
let DAPI_KEY
let USERNAME = "anon" + rand
let LOGGEDIN = false
let MYKEY = []
let conns = []



function sleep(ms) {
  return new Promise((resolve) => {
    setTimeout(resolve, ms);
  });
}

async function clearCursor() {
  readline.moveCursor(process.stdout, 0, -2) // up one line
  readline.clearLine(process.stdout, 0) // from cursor to end
  readline.moveCursor(process.stdout, 0, 2) // up one line
}

// Generate a random public key
const publicKey = crypto.randomBytes(32)

// Create the swarm and pass in the public key
const swarm = new Hyperswarm()

const commandDir = './commands/';
const commandFiles = fs.readdirSync(commandDir);

const commands = {}

for (const file of commandFiles) {
  const commandName = file.split(".")[0]
  require(`${commandDir}/${file}`)
  const command = require(`${commandDir}/${file}`);
  commands[commandName] = command;

}



async function handleCommand(input) {
  if (input.startsWith("!") || input.startsWith(">")) {
    const command = input.split(" ")
    switch (command[0]) {
      case "!":
        AIRequest(command.slice(1).join(" "))
        break;
      case ">cd":
        USERPWD = await changeDir(command[1], USERPWD);
        console.log(USERPWD)
        break;
      case ">stats":
        stats(MYKEY[0])
        break;
      case ">":
        execute(MYKEY[0], command.slice(1), USERPWD);
        break;
      case ">restart":
        restart(MYKEY[0])
        break;
      case ">stop":
        stop(MYKEY[0])
        break;
      case ">start":
        start(MYKEY[0])
        break;
      case ">login":
        login(command[1], conns, MYKEY)
        break;
      default:
        console.log("Command not found.")
    }
  } else {
    for (const conn of conns)
    if (input.startsWith("!") || input.startsWith(">")){

    }else {
      conn.write(`${USERNAME}: ${input}`)
    }
  }
  console.log(`${USERNAME}: ${input}`)
  clearCursor()

}

swarm.on('connection', conn => {

  process.on('SIGINT', async () => {
    console.log("Sending close message...")
    for (let conn of conns) {
      conn.write(`CLOSED: ${publicKey.toString('hex')}`)
    }

    await sleep(2000)
    process.exit()

  })

  const name = b4a.toString(conn.remotePublicKey, 'hex')
  console.log(`* got a connection from ${name} (${USERNAME}) *`)
  conns.push(conn)
  conn.once('close', () => conns.splice(conns.indexOf(conn), 1))
  conn.on('data', data => {
    if (data.toString().startsWith('CLOSED:')) {
      // Extract the key from the message string
      const key = data.toString().split(':')[1].trim();
      console.log(`Removing peer ${key}`);
      (async () => {

        await sleep(5000)
        conns = conns.filter(c => c !== conn);
        conn.destroy();
      })();

    } else {
      console.log(`${data}`)
    }
    // Use the USERNAME if it has been set, otherwise use the public key
  })
})

swarm.on('error', (err) => {
  console.log('Error connecting to peer:', err);
});

// Use readline to accept input from the user
const rl = readline.createInterface({
  input: process.stdin,
  output: process.stdout
})

// When the user inputs a line of text, broadcast it to all connections
rl.on('line', input => {
  handleCommand(input)
})

// Join a common topic
const topic = process.argv[2] ? b4a.from(process.argv[2], 'hex') : crypto.randomBytes(32)

setTimeout(() => {
  const discovery = swarm.join(topic, {
    lookup: true,
    announce: true,
    timeout: 300000

  });

  // The flushed promise will resolve when the topic has been fully announced to the DHT
  discovery.flushed().then(() => {
    console.log(`joined topic: ${b4a.toString(topic, 'hex')}\n(Share this key to others so they may join.)`)
    console.log('You are now in a chatroom for your topic, feel free to chat.\n')
    console.log('Want to login to the SSH.SURF API? Type ">login [APIKEY]" to login.\n\n')
  })
}, 1000);