import { PROGRAM_ID as TOKEN_METADATA_PROGRAM_ID } from "@metaplex-foundation/mpl-token-metadata";
import {
  Connection,
  Keypair,
  PublicKey,
  SystemProgram,
  SYSVAR_RENT_PUBKEY,
  TransactionInstruction,
  Transaction,
  sendAndConfirmTransaction,
} from "@solana/web3.js";
import { TOKEN_2022_PROGRAM_ID, TOKEN_PROGRAM_ID } from "@solana/spl-token";
import * as borsh from "borsh";
import { Buffer } from "buffer";

function createKeypairFromFile(path: string): Keypair {
  return Keypair.fromSecretKey(
    Buffer.from(JSON.parse(require("fs").readFileSync(path, "utf-8")))
  );
}

class Assignable {
  constructor(properties) {
    Object.keys(properties).map((key) => {
      return (this[key] = properties[key]);
    });
  }
}

class CreateTokenArgs extends Assignable {
  toBuffer() {
    return Buffer.from(borsh.serialize(CreateTokenArgsSchema, this));
  }
}
const CreateTokenArgsSchema = new Map([
  [
    CreateTokenArgs,
    {
      kind: "struct",
      fields: [["token_decimals", "u8"]],
    },
  ],
]);

describe("Create Token", async () => {
  const connection = new Connection(
    `https://api.devnet.solana.com/`,
    "confirmed"
  );
  const payer = createKeypairFromFile(
    require("os").homedir() + "/.config/solana/id.json"
  );
  const program = createKeypairFromFile(
    "./program/target/deploy/program-keypair.json"
  );

  it("Create a Token-22 SPL-Token !", async () => {
    const mintKeypair: Keypair = Keypair.generate();

    const instructionData = new CreateTokenArgs({
      token_decimals: 9,
    });

    const instruction = new TransactionInstruction({
      keys: [
        { pubkey: mintKeypair.publicKey, isSigner: true, isWritable: true }, // Mint account
        { pubkey: payer.publicKey, isSigner: false, isWritable: true }, // Mint authority account
        { pubkey: payer.publicKey, isSigner: true, isWritable: true }, // Transaction Payer
        { pubkey: SYSVAR_RENT_PUBKEY, isSigner: false, isWritable: false }, // Rent account
        { pubkey: SystemProgram.programId, isSigner: false, isWritable: false }, // System program
        { pubkey: TOKEN_2022_PROGRAM_ID, isSigner: false, isWritable: false }, // Token program
      ],
      programId: program.publicKey,
      data: instructionData.toBuffer(),
    });

    const signature = await sendAndConfirmTransaction(
      connection,
      new Transaction().add(instruction),
      [payer, mintKeypair]
    );

    console.log(`Token Mint Address: `, mintKeypair.publicKey.toBase58());
    console.log(`Transaction Signature: `, signature);
  });
});