/**
 * KANBAN_MIN_STATES — ONE threshold, stated by every document that teaches it.
 *
 * The cross-dimension audit XD-003 demanded a SmartKanban for ANY state field
 * while /ba-create-screen makes the board mandatory from 3 states on: the rule
 * and the skill it names as its own remedy disagreed, and a corpus with
 * two-value statuses could not satisfy both (support report 6819314a0164).
 * The number now lives in lib/page-spec-kanban; this test refuses a document
 * that states another one, or stops stating it.
 */
import { describe, it, expect } from 'vitest'
import { readFileSync } from 'node:fs'
import { KANBAN_MIN_STATES } from '../page-spec-kanban.js'
import { baSkillFile } from './helpers/cli-options.js'

/** Documents that state the threshold, with the sentence that carries it. */
const DOCS: { file: string; role: string }[] = [
  { file: 'create-screen/levels/kanban-screens.md', role: 'authoring level — « Mandatory when »' },
  { file: 'create-screen/references/type-mapping.md', role: 'authoring reference — SmartKanban auto-detection' },
  { file: 'create-screen/references/post-check.md', role: 'authoring self-check' },
  { file: 'audit-cross-dimension/SKILL.md', role: 'audit contract — XD-003' },
]

/** `≥3`, `≥ 3`, `at least 3` — followed by what is counted. */
const STATED = /(?:≥\s*|at\s+least\s+)(\d+)\s+(?:distinct\s+)?(?:options?|states?|values?)\b/gi

function thresholdsIn(md: string): number[] {
  return [...md.replace(/\*\*/g, '').matchAll(STATED)].map((m) => Number(m[1]))
}

describe('KANBAN_MIN_STATES ↔ the documents that teach it', () => {
  for (const doc of DOCS) {
    it(`${doc.file} (${doc.role})`, () => {
      const found = thresholdsIn(readFileSync(baSkillFile(doc.file), 'utf8'))
      expect(found, 'the document no longer states the threshold').not.toEqual([])
      expect([...new Set(found)], 'the document states another threshold than lib/page-spec-kanban').toEqual([KANBAN_MIN_STATES])
    })
  }

  it('the matcher reads the spellings in use, and only a threshold', () => {
    expect(thresholdsIn('a status enum with **≥3 options**')).toEqual([3])
    expect(thresholdsIn('with at least 3\noptions — and that')).toEqual([3])
    expect(thresholdsIn('at least 3 distinct states the user transitions between')).toEqual([3])
    expect(thresholdsIn('declares **at least 3 values**')).toEqual([3])
    expect(thresholdsIn('a lifecycle of ≥ 3 states')).toEqual([3])
    expect(thresholdsIn('≤ 7 columns, at least one screen')).toEqual([])
  })
})