import { describe, it, expect } from 'vitest';
import { render, screen } from '@testing-library/react';
import { computeBadgeState, FirmwareBadge } from '@/components/firmware/firmware-badge';
import type { Device } from '@/types/device';

function makeDevice(overrides: Partial<Device> = {}): Device {
  return {
    id: 'dev-1',
    name: 'KL520 #1',
    type: 'kneron_kl520',
    port: '/dev/usb0',
    status: 'connected',
    firmwareVersion: 'v2.2.0',
    bundledFirmwareVersion: 'v2.2.0',
    firmwareIsLegacy: false,
    firmwareCanUpgrade: false,
    ...overrides,
  };
}

describe('computeBadgeState — AC-FW-1.1 4-color rule', () => {
  it('returns legacy when firmwareIsLegacy is true', () => {
    expect(
      computeBadgeState(
        makeDevice({ firmwareIsLegacy: true, firmwareVersion: 'KDP1' }),
      ),
    ).toBe('legacy');
  });

  it('returns unknown when firmwareVersion is missing', () => {
    expect(computeBadgeState(makeDevice({ firmwareVersion: '' }))).toBe('unknown');
  });

  it('returns unknown when bundledFirmwareVersion is missing or "unknown"', () => {
    expect(
      computeBadgeState(makeDevice({ bundledFirmwareVersion: '' })),
    ).toBe('unknown');
    expect(
      computeBadgeState(makeDevice({ bundledFirmwareVersion: 'unknown' })),
    ).toBe('unknown');
  });

  it('returns current when firmwareVersion equals bundled', () => {
    expect(computeBadgeState(makeDevice())).toBe('current');
  });

  it('returns older when both KDP2 but versions differ', () => {
    expect(
      computeBadgeState(
        makeDevice({ firmwareVersion: 'KDP2.1.0', bundledFirmwareVersion: 'KDP2.2.0' }),
      ),
    ).toBe('older');
  });

  it('legacy precedence: if isLegacy=true, even with matching version returns legacy', () => {
    // 邊界 case：driver 端 isLegacy=true 但 firmwareVersion 又恰好等於 bundled
    // （理論不會發生、但若發生、isLegacy 優先）。
    expect(
      computeBadgeState(
        makeDevice({ firmwareIsLegacy: true, firmwareVersion: 'v2.2.0' }),
      ),
    ).toBe('legacy');
  });
});

describe('FirmwareBadge — renders correct state + a11y', () => {
  it('renders with data-state attribute matching computeBadgeState', () => {
    const { container } = render(<FirmwareBadge device={makeDevice()} />);
    const el = container.querySelector('[data-testid="firmware-badge"]');
    expect(el).not.toBeNull();
    expect(el?.getAttribute('data-state')).toBe('current');
  });

  it('renders legacy badge with KDP1 label', () => {
    render(
      <FirmwareBadge
        device={makeDevice({ firmwareIsLegacy: true, firmwareVersion: 'KDP1' })}
      />,
    );
    const badge = screen.getByTestId('firmware-badge');
    expect(badge.getAttribute('data-state')).toBe('legacy');
    // 顯示 KDP1 文字（不是版本字串）
    expect(badge.textContent).toContain('KDP1');
  });

  it('renders unknown badge when firmwareVersion is missing', () => {
    render(<FirmwareBadge device={makeDevice({ firmwareVersion: '' })} />);
    const badge = screen.getByTestId('firmware-badge');
    expect(badge.getAttribute('data-state')).toBe('unknown');
  });

  it('has aria-label and title (tooltip)', () => {
    render(<FirmwareBadge device={makeDevice()} />);
    const badge = screen.getByTestId('firmware-badge');
    expect(badge.getAttribute('aria-label')).toBeTruthy();
    expect(badge.getAttribute('title')).toBeTruthy();
  });
});