import { render, screen } from '@testing-library/react';
import { describe, expect, it } from 'vitest';
import { Numeric } from '../numeric';

describe('Numeric', () => {
  it('formats VND by default', () => {
    render(<Numeric value={1000000} />);
    // Intl.NumberFormat vi-VN with currency VND — should contain digits
    expect(screen.getByText(/1\.000\.000/)).toBeInTheDocument();
  });

  it('formats percent', () => {
    render(<Numeric value={5.5} format="percent" />);
    expect(screen.getByText('+5.5%')).toBeInTheDocument();
  });

  it('formats negative percent without plus sign', () => {
    render(<Numeric value={-3.2} format="percent" />);
    expect(screen.getByText('-3.2%')).toBeInTheDocument();
  });

  it('formats decimal', () => {
    render(<Numeric value={1234.5} format="decimal" fractionDigits={2} />);
    // vi-VN decimal uses comma as decimal separator
    expect(screen.getByText(/1\.234/)).toBeInTheDocument();
  });

  it('formats compact', () => {
    render(<Numeric value={2000000} format="compact" />);
    expect(screen.getByText(/\d/)).toBeInTheDocument();
  });

  it('renders as span with data-numeric attribute', () => {
    render(<Numeric value={100} data-testid="num" />);
    const el = screen.getByTestId('num');
    expect(el.tagName).toBe('SPAN');
    expect(el).toHaveAttribute('data-numeric');
  });

  it('has tabular-nums and font-mono classes', () => {
    render(<Numeric value={100} data-testid="num" />);
    const el = screen.getByTestId('num');
    expect(el).toHaveClass('tabular-nums', 'font-mono');
  });
});
