import assert from 'node:assert/strict'
import test from 'node:test'
import { seoPageHref, seoPageNumber } from '../app/utils/pageHref.ts'
import { seoFillPages } from '../app/utils/seo.ts'

test('seoPageHref: the UI-SPEC L2 examples', () => {
  assert.equal(seoPageHref('/blog', 1, 'query'), '/blog')
  assert.equal(seoPageHref('/blog?sort=new', 3, 'query'), '/blog?sort=new&page=3')
  assert.equal(seoPageHref('/blog', 3, 'path', 'strona'), '/blog/strona/3')
  assert.equal(seoPageHref('/en/blog', 1, 'path', 'page'), '/en/blog')
})

test('seoPageHref: a page already in the URL is replaced', () => {
  assert.equal(seoPageHref('/blog?page=5&sort=new', 6, 'query'), '/blog?sort=new&page=6')
  assert.equal(seoPageHref('/blog?page=5', 1, 'query'), '/blog')
  assert.equal(seoPageHref('/blog/strona/5', 4, 'path', 'strona'), '/blog/strona/4')
  assert.equal(seoPageHref('/blog/strona/5?sort=new', 1, 'path', 'strona'), '/blog?sort=new')
  assert.equal(seoPageHref('/strona/5', 1, 'path', 'strona'), '/')
  assert.equal(seoPageHref('/docs/page/3', 2, 'query'), '/docs/page/3?page=2', 'a path segment is left alone in the query form')
  assert.equal(seoPageHref('/blog?p=2', 3, 'query', '', 'p'), '/blog?p=3')
  assert.equal(seoPageHref('/blog', 2, 'path'), '/blog/page/2', 'the param is the segment when none is given')
})

test('seoPageHref: query values are encoded, never concatenated raw', () => {
  assert.equal(seoPageHref('/blog?q=%22%3E%3Cscript%3E', 2, 'query'), '/blog?q=%22%3E%3Cscript%3E&page=2')
  assert.equal(seoPageHref('/blog#top', 2, 'query'), '/blog?page=2')
})

test('seoPageNumber: 1 without a page, null for an invalid one', () => {
  assert.equal(seoPageNumber('/blog'), 1)
  assert.equal(seoPageNumber('/blog?page=3'), 3)
  assert.equal(seoPageNumber('/blog?page=abc'), null)
  assert.equal(seoPageNumber('/blog?page=0'), null)
  assert.equal(seoPageNumber('/blog?page=1&page=2'), null)
  assert.equal(seoPageNumber('/blog/strona/4', 'path', 'strona'), 4)
  assert.equal(seoPageNumber('/blog/strona/x', 'path', 'strona'), 1)
})

test('seoFillPages: %pages% in the title and meta, only once the count is known', () => {
  const head = { title: 'Blog – strona 5 z %pages%', meta: [{ name: 'description', content: 'strona 5 z %pages%' }, { name: 'robots', content: 'index' }] }
  const out = seoFillPages(head, 14)
  assert.equal(out.title, 'Blog – strona 5 z 14')
  assert.equal(out.meta[0]!.content, 'strona 5 z 14')
  assert.equal(out.meta[1], head.meta[1])
  assert.equal(seoFillPages(head, null), head)
  assert.equal(seoFillPages(head, 0), head)
})