import { describe, it, expect } from 'vitest';
import { WalletTransactionViewModel, FullTransactionDto } from './WalletTransactionViewModel';

const createTx = (overrides: Partial<FullTransactionDto> = {}): FullTransactionDto => ({
  id: 'tx-1',
  type: 'sponsorship',
  description: 'Test',
  amount: 100,
  fee: 10,
  netAmount: 90,
  date: new Date('2024-01-01T00:00:00Z'),
  status: 'completed',
  reference: 'ref-1',
  ...overrides,
});

describe('WalletTransactionViewModel', () => {
  it('maps DTO fields into the view model', () => {
    const vm = new WalletTransactionViewModel(createTx());

    expect(vm.id).toBe('tx-1');
    expect(vm.type).toBe('sponsorship');
    expect(vm.amount).toBe(100);
    expect(vm.netAmount).toBe(90);
    expect(vm.status).toBe('completed');
  });

  it('formats amount with sign and currency symbol', () => {
    const incoming = new WalletTransactionViewModel(createTx({ amount: 50 }));
    const outgoing = new WalletTransactionViewModel(createTx({ amount: -20 }));

    expect(incoming.formattedAmount).toBe('+$50.00');
    expect(outgoing.formattedAmount).toBe('$20.00');
  });

  it('derives amount color and isIncoming from amount sign', () => {
    const incoming = new WalletTransactionViewModel(createTx({ amount: 10 }));
    const outgoing = new WalletTransactionViewModel(createTx({ amount: -5 }));

    expect(incoming.amountColor).toBe('green');
    expect(incoming.isIncoming).toBe(true);
    expect(outgoing.amountColor).toBe('red');
    expect(outgoing.isIncoming).toBe(false);
  });

  it('derives typeDisplay and formattedDate', () => {
    const vm = new WalletTransactionViewModel(createTx({ type: 'membership' }));

    expect(vm.typeDisplay).toBe('Membership');
    expect(typeof vm.formattedDate).toBe('string');
  });
});