import { Connection, Keypair } from '@solana/web3.js';
import * as fs from 'fs';
import * as splToken from "@solana/spl-token";
import * as os from 'os';

// number of users
const nbUsers = process.argv[2];
// url
const url = process.argv.length > 3 ? process.argv[3] : "http://0.0.0.0:8899";
// outfile
const outFile = process.argv.length > 4 ? process.argv[4] : "out.json";

console.log("creating " + nbUsers + " Users on " + url + " out file " + outFile);

(async () => {
    const connection = new Connection(url, 'confirmed');

    const authority = Keypair.fromSecretKey(
        Uint8Array.from(
            JSON.parse(
                process.env.KEYPAIR ||
                fs.readFileSync(os.homedir() + '/.config/solana/id.json', 'utf-8'),
            ),
        ),
    );

    // create n key pairs
    const userKps = [...Array(nbUsers)].map(_x => Keypair.generate())

    // create and initialize new mint
    const mint = await splToken.createMint(
        connection,
        authority,
        authority.publicKey,
        null,
        6,
    );

    // create accounts for each key pair created earlier
    const accounts = await Promise.all(userKps.map(x => {
        return splToken.createAccount(
            connection,
            authority,
            mint,
            x.publicKey,
        )
    }));

    // mint to accounts
    await Promise.all(accounts.map(to => {
        return splToken.mintTo(
            connection,
            authority,
            mint,
            to,
            authority,
            1_000_000_000_000,
        )
    }));

    const users = userKps.map(user => {
        return {
            publicKey: user.publicKey.toBase58(),
            secretKey: Array.from(user.secretKey)
        }
    });

    const data = {
        'users': users,
        'tokenAccounts': accounts,
        'mint': mint,
        'minted_amount': 1_000_000_000_000
    };

    console.log('created ' + nbUsers + ' Users and minted 10^12 tokens for mint ' + mint);

    fs.writeFileSync(outFile, JSON.stringify(data));

})()