import { describe, it, expect } from 'vitest'
import { render } from '@testing-library/react'
import { KnowledgeUnitCard } from './KnowledgeUnitCard'
import type { KnowledgeUnit } from '@/lib/sdk/advisor/evidence'

const base: KnowledgeUnit = { id: 's1', regulation: { code: 'dsk', short: 'DSK Sdm B51' } }

describe('KnowledgeUnitCard', () => {
  it('does not duplicate the regulation when label equals the short name', () => {
    const { container } = render(<KnowledgeUnitCard unit={{ ...base, label: 'DSK Sdm B51' }} />)
    const occurrences = (container.textContent?.match(/DSK Sdm B51/g) || []).length
    expect(occurrences).toBe(1)
  })

  it('shows the label when it differs from the short name (no breadcrumb)', () => {
    const { container } = render(<KnowledgeUnitCard unit={{ ...base, label: 'Art. 30 DSGVO' }} />)
    expect(container.textContent).toContain('DSK Sdm B51')
    expect(container.textContent).toContain('Art. 30 DSGVO')
  })

  it('renders the section/paragraph breadcrumb when present', () => {
    const { container } = render(
      <KnowledgeUnitCard unit={{ ...base, section: 'Art. 5', paragraph: 'Abs. 2' }} />,
    )
    expect(container.textContent).toContain('Art. 5')
    expect(container.textContent).toContain('Abs. 2')
  })
})