import { Connection, Keypair, PublicKey, SystemProgram, Transaction, sendAndConfirmTransaction } from '@solana/web3.js';
import { describe, it } from 'mocha';
import {
  type AddCarArgs,
  Car,
  RentalOrder,
  RentalOrderStatus,
  createAddCarInstruction,
  createBookRentalInstruction,
  createPickUpCarInstruction,
  createReturnCarInstruction,
} from './generated';

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

const carBmw: AddCarArgs = {
  year: 2020,
  make: 'BMW',
  model: 'iX1',
};

const carMercedes: AddCarArgs = {
  year: 2019,
  make: 'Mercedes-Benz',
  model: 'EQS',
};

const rentalInfo = {
  name: 'Fred Flinstone',
  pickUpDate: '01/28/2023 8:00 AM',
  returnDate: '01/28/2023 10:00 PM',
  price: 300,
};

describe('Car Rental Service', () => {
  const connection = new Connection('https://api.devnet.solana.com', 'confirmed');
  const payer = loadKeypairFromFile(`${require('node:os').homedir()}/.config/solana/id.json`);
  const program = loadKeypairFromFile('./program/target/deploy/car_rental_service-keypair.json');

  let bmwPublicKey: PublicKey;
  let mercedesPublicKey: PublicKey;

  async function createCar(car: AddCarArgs): Promise<PublicKey> {
    const carAccountPublicKey = PublicKey.findProgramAddressSync(
      [Buffer.from('car'), Buffer.from(car.make), Buffer.from(car.model)],
      program.publicKey,
    )[0];
    const ix = createAddCarInstruction(
      {
        carAccount: carAccountPublicKey,
        payer: payer.publicKey,
        systemProgram: SystemProgram.programId,
      },
      { addCarArgs: { ...car } },
    );
    const sx = await sendAndConfirmTransaction(connection, new Transaction().add(ix), [payer], { skipPreflight: true });
    await connection.confirmTransaction(sx);
    const carData = await Car.fromAccountAddress(connection, carAccountPublicKey);
    console.log('New car created:');
    console.log(`   Year    : ${carData.year}`);
    console.log(`   Make    : ${carData.make}`);
    console.log(`   Model   : ${carData.model}`);
    return carAccountPublicKey;
  }

  it('Create a car that can be rented', async () => {
    bmwPublicKey = await createCar(carBmw);
  });
  it('Create another car that can be rented', async () => {
    mercedesPublicKey = await createCar(carMercedes);
  });

  const evaluateStatus = (status: RentalOrderStatus): string => {
    if (status === RentalOrderStatus.Created) return 'Created';
    if (status === RentalOrderStatus.PickedUp) return 'Picked Up';
    return 'Returned';
  };

  async function printRentalDetails(rentalPublicKey: PublicKey, carPublicKey: PublicKey) {
    const rentalData = await RentalOrder.fromAccountAddress(connection, rentalPublicKey);
    const carData = await Car.fromAccountAddress(connection, carPublicKey);
    console.log('Rental booked:');
    console.log('   Vehicle details:');
    console.log(`       Year    : ${carData.year}`);
    console.log(`       Make    : ${carData.make}`);
    console.log(`       Model   : ${carData.model}`);
    console.log(`   Name    : ${rentalData.name}`);
    console.log(`   Pick Up : ${rentalData.pickUpDate}`);
    console.log(`   Return  : ${rentalData.returnDate}`);
    console.log(`   Price   : ${rentalData.price}`);
    console.log(`   Status  : ${evaluateStatus(rentalData.status)}`);
  }

  it('Book a new rental', async () => {
    const rentalAccountPublicKey = PublicKey.findProgramAddressSync(
      [Buffer.from('rental_order'), bmwPublicKey.toBuffer(), payer.publicKey.toBuffer()],
      program.publicKey,
    )[0];
    const ix = createBookRentalInstruction(
      {
        rentalAccount: rentalAccountPublicKey,
        carAccount: bmwPublicKey,
        payer: payer.publicKey,
        systemProgram: SystemProgram.programId,
      },
      {
        bookRentalArgs: { ...rentalInfo },
      },
    );
    const sx = await sendAndConfirmTransaction(connection, new Transaction().add(ix), [payer]);
    await connection.confirmTransaction(sx);
    await printRentalDetails(rentalAccountPublicKey, bmwPublicKey);
  });

  it('Pick up your rental car', async () => {
    const rentalAccountPublicKey = PublicKey.findProgramAddressSync(
      [Buffer.from('rental_order'), bmwPublicKey.toBuffer(), payer.publicKey.toBuffer()],
      program.publicKey,
    )[0];
    const ix = createPickUpCarInstruction({
      rentalAccount: rentalAccountPublicKey,
      carAccount: bmwPublicKey,
      payer: payer.publicKey,
    });
    const sx = await sendAndConfirmTransaction(connection, new Transaction().add(ix), [payer]);
    await connection.confirmTransaction(sx);
    await printRentalDetails(rentalAccountPublicKey, bmwPublicKey);
  });

  it('Return your rental car', async () => {
    const rentalAccountPublicKey = PublicKey.findProgramAddressSync(
      [Buffer.from('rental_order'), bmwPublicKey.toBuffer(), payer.publicKey.toBuffer()],
      program.publicKey,
    )[0];
    const ix = createReturnCarInstruction({
      rentalAccount: rentalAccountPublicKey,
      carAccount: bmwPublicKey,
      payer: payer.publicKey,
    });
    const sx = await sendAndConfirmTransaction(connection, new Transaction().add(ix), [payer]);
    await connection.confirmTransaction(sx);
    await printRentalDetails(rentalAccountPublicKey, bmwPublicKey);
  });
});