import { describe, expect, it } from 'vitest'
import { renderMarkdown, summarise, toMediaImage } from '../../frontend/server/utils/pocketbase'

describe('renderMarkdown', () => {
  it('returns an empty string for null/undefined/empty input', () => {
    expect(renderMarkdown(null)).toBe('')
    expect(renderMarkdown(undefined)).toBe('')
    expect(renderMarkdown('')).toBe('')
  })

  it('converts Markdown to HTML', () => {
    const html = renderMarkdown('# Titolo\n\nCorpo **grassetto**.')
    expect(html).toContain('<h1>Titolo</h1>')
    expect(html).toContain('<strong>grassetto</strong>')
  })
})

describe('summarise', () => {
  it('returns short text unchanged, stripped of Markdown syntax', () => {
    expect(summarise('# Titolo\n\nTesto breve.')).toBe('Titolo Testo breve.')
  })

  it('strips code fences, images and unwraps links', () => {
    const source = '```js\nconst x = 1\n```\n![alt](img.png) [testo](https://example.com) fine.'
    expect(summarise(source)).toBe('testo fine.')
  })

  it('clips long text on a word boundary with an ellipsis', () => {
    const source = 'parola '.repeat(40).trim()
    const result = summarise(source, 20)
    expect(result.length).toBeLessThanOrEqual(21)
    expect(result.endsWith('…')).toBe(true)
    expect(result).not.toContain(' …')
  })

  it('returns an empty string for null/undefined input', () => {
    expect(summarise(null)).toBe('')
    expect(summarise(undefined)).toBe('')
  })
})

describe('toMediaImage', () => {
  it('returns null when there is no filename', () => {
    expect(toMediaImage('articles', 'abc123', '', 'alt')).toBeNull()
    expect(toMediaImage('articles', 'abc123', null, 'alt')).toBeNull()
    expect(toMediaImage('articles', 'abc123', undefined, 'alt')).toBeNull()
  })

  it('builds the PocketBase file URL from collection, id and filename', () => {
    expect(toMediaImage('articles', 'abc123', 'cover.jpg', 'Testo alternativo')).toEqual({
      url: '/api/files/articles/abc123/cover.jpg',
      alt: 'Testo alternativo',
    })
  })

  it('normalises a missing/empty alt to null', () => {
    expect(toMediaImage('articles', 'abc123', 'cover.jpg', null)).toEqual({
      url: '/api/files/articles/abc123/cover.jpg',
      alt: null,
    })
    expect(toMediaImage('articles', 'abc123', 'cover.jpg', '')).toEqual({
      url: '/api/files/articles/abc123/cover.jpg',
      alt: null,
    })
  })
})