import { Buffer } from 'node:buffer';
import { PROGRAM_ID as TOKEN_METADATA_PROGRAM_ID } from '@metaplex-foundation/mpl-token-metadata';
import { ASSOCIATED_TOKEN_PROGRAM_ID, TOKEN_PROGRAM_ID, getAssociatedTokenAddress } from '@solana/spl-token';
import {
  Connection,
  Keypair,
  PublicKey,
  SYSVAR_RENT_PUBKEY,
  SystemProgram,
  Transaction,
  TransactionInstruction,
  sendAndConfirmTransaction,
} from '@solana/web3.js';
import { CreateTokenArgs, InitArgs, MintToArgs, NftMinterInstruction } from './instructions';

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

describe('NFT Minter', async () => {
  // const connection = new Connection(`http://localhost:8899`, 'confirmed');
  const connection = new Connection('https://api.devnet.solana.com/', 'confirmed');
  const payer = createKeypairFromFile(`${require('node:os').homedir()}/.config/solana/id.json`);
  const program = createKeypairFromFile('./program/target/deploy/program-keypair.json');

  const mintAuthorityPublicKey = PublicKey.findProgramAddressSync([Buffer.from('mint_authority')], program.publicKey)[0];

  const mintKeypair: Keypair = Keypair.generate();

  it('Init Mint Authority PDA', async () => {
    const instructionData = new InitArgs({
      instruction: NftMinterInstruction.Init,
    });

    const ix = new TransactionInstruction({
      keys: [
        { pubkey: mintAuthorityPublicKey, isSigner: false, isWritable: true },
        { pubkey: payer.publicKey, isSigner: false, isWritable: true },
        { pubkey: SystemProgram.programId, isSigner: false, isWritable: false },
      ],
      programId: program.publicKey,
      data: instructionData.toBuffer(),
    });

    const sx = await sendAndConfirmTransaction(connection, new Transaction().add(ix), [payer], { skipPreflight: true });

    console.log('Success!');
    console.log(`   Mint Address: ${mintKeypair.publicKey}`);
    console.log(`   Tx Signature: ${sx}`);
  });

  it('Create an NFT!', async () => {
    const metadataAddress = PublicKey.findProgramAddressSync(
      [Buffer.from('metadata'), TOKEN_METADATA_PROGRAM_ID.toBuffer(), mintKeypair.publicKey.toBuffer()],
      TOKEN_METADATA_PROGRAM_ID,
    )[0];

    const instructionData = new CreateTokenArgs({
      instruction: NftMinterInstruction.Create,
      nft_title: 'Homer NFT',
      nft_symbol: 'HOMR',
      nft_uri: 'https://raw.githubusercontent.com/solana-developers/program-examples/new-examples/tokens/tokens/.assets/nft.json',
    });

    const ix = new TransactionInstruction({
      keys: [
        { pubkey: mintKeypair.publicKey, isSigner: true, isWritable: true }, // Mint account
        { pubkey: mintAuthorityPublicKey, isSigner: false, isWritable: true }, // Mint authority account
        { pubkey: metadataAddress, isSigner: false, isWritable: true }, // Metadata account
        { pubkey: payer.publicKey, isSigner: true, isWritable: true }, // Payer
        { pubkey: SYSVAR_RENT_PUBKEY, isSigner: false, isWritable: false }, // Rent account
        { pubkey: SystemProgram.programId, isSigner: false, isWritable: false }, // System program
        { pubkey: TOKEN_PROGRAM_ID, isSigner: false, isWritable: false }, // Token program
        {
          pubkey: TOKEN_METADATA_PROGRAM_ID,
          isSigner: false,
          isWritable: false,
        }, // Token metadata program
      ],
      programId: program.publicKey,
      data: instructionData.toBuffer(),
    });

    const sx = await sendAndConfirmTransaction(connection, new Transaction().add(ix), [payer, mintKeypair], { skipPreflight: true });

    console.log('Success!');
    console.log(`   Mint Address: ${mintKeypair.publicKey}`);
    console.log(`   Tx Signature: ${sx}`);
  });

  it('Mint the NFT to your wallet!', async () => {
    const metadataAddress = PublicKey.findProgramAddressSync(
      [Buffer.from('metadata'), TOKEN_METADATA_PROGRAM_ID.toBuffer(), mintKeypair.publicKey.toBuffer()],
      TOKEN_METADATA_PROGRAM_ID,
    )[0];

    const editionAddress = PublicKey.findProgramAddressSync(
      [Buffer.from('metadata'), TOKEN_METADATA_PROGRAM_ID.toBuffer(), mintKeypair.publicKey.toBuffer(), Buffer.from('edition')],
      TOKEN_METADATA_PROGRAM_ID,
    )[0];

    const associatedTokenAccountAddress = await getAssociatedTokenAddress(mintKeypair.publicKey, payer.publicKey);

    const instructionData = new MintToArgs({
      instruction: NftMinterInstruction.Mint,
    });

    const ix = new TransactionInstruction({
      keys: [
        { pubkey: mintKeypair.publicKey, isSigner: false, isWritable: true }, // Mint account
        { pubkey: metadataAddress, isSigner: false, isWritable: true }, // Metadata account
        { pubkey: editionAddress, isSigner: false, isWritable: true }, // Edition account
        { pubkey: mintAuthorityPublicKey, isSigner: false, isWritable: true }, // Mint authority account
        {
          pubkey: associatedTokenAccountAddress,
          isSigner: false,
          isWritable: true,
        }, // ATA
        { pubkey: payer.publicKey, isSigner: true, isWritable: true }, // Payer
        { pubkey: SYSVAR_RENT_PUBKEY, isSigner: false, isWritable: false }, // Rent account
        { pubkey: SystemProgram.programId, isSigner: false, isWritable: false }, // System program
        { pubkey: TOKEN_PROGRAM_ID, isSigner: false, isWritable: false }, // Token program
        {
          pubkey: ASSOCIATED_TOKEN_PROGRAM_ID,
          isSigner: false,
          isWritable: false,
        }, // Associated token program
        {
          pubkey: TOKEN_METADATA_PROGRAM_ID,
          isSigner: false,
          isWritable: false,
        }, // Token metadata program
      ],
      programId: program.publicKey,
      data: instructionData.toBuffer(),
    });

    const sx = await sendAndConfirmTransaction(connection, new Transaction().add(ix), [payer]);

    console.log('Success!');
    console.log(`   ATA Address: ${associatedTokenAccountAddress}`);
    console.log(`   Tx Signature: ${sx}`);
  });
});