import { describe, expect, it } from 'vitest'

import { BULLETIN_HIGHLIGHT_LIMIT, buildBulletin } from '../../scripts/lib/dossieBulletin.mjs'
import { MUNICIPALITY_UNIT } from '../../scripts/lib/dossieUnit.mjs'

const fact = (index: number, overrides: Record<string, unknown> = {}) => ({
  id: `fato-${index}`,
  era: 'C',
  sphere: 'municipio',
  area: 'Saúde',
  headline: `Entrega ${index}`,
  detail: `Detalhe ${index}`,
  value: `R$ ${index} mil`,
  year: '2024',
  phase: 'empenhado',
  sourceUrl: `https://exemplo.test/${index}`,
  sourceDate: '2026-09-10',
  ...overrides,
})

const generatedAt = new Date('2026-09-17T12:00:00.000Z')

describe('buildBulletin', () => {
  it('caps highlights and "e mais" items', () => {
    const facts = Array.from({ length: 30 }, (_value, index) => fact(index))
    const bulletin = buildBulletin({ facts, municipality: 'Ilhéus', generatedAt })
    expect(bulletin.highlights).toHaveLength(BULLETIN_HIGHLIGHT_LIMIT)
    // The unit descriptor owns the "E mais" budget (long labels wrap).
    expect(bulletin.moreItems).toHaveLength(MUNICIPALITY_UNIT.bulletinMoreLimit)
  })

  it('counts the facts left out of the one-page boletim (never a silent drop, C188)', () => {
    const facts = Array.from({ length: 25 }, (_value, index) => fact(index))
    const bulletin = buildBulletin({ facts, municipality: 'Ilhéus', generatedAt })
    expect(bulletin.factsTotal).toBe(25)
    expect(bulletin.highlights.length + bulletin.moreItems.length + bulletin.factsRemaining).toBe(
      bulletin.factsTotal,
    )
  })

  it('has no remainder when everything fits', () => {
    const bulletin = buildBulletin({ facts: [fact(1)], municipality: 'Ilhéus', generatedAt })
    expect(bulletin.factsRemaining).toBe(0)
  })

  it('orders município before região and a sourced number before none', () => {
    const facts = [
      fact(1, { sphere: 'regiao' }),
      fact(2, { value: null }),
      fact(3, { sphere: 'municipio', value: '10 UPAs' }),
    ]
    const bulletin = buildBulletin({ facts, municipality: 'Ilhéus', generatedAt })
    expect(bulletin.highlights[0].title).toBe('Entrega 3')
  })

  it('composes the card eyebrow with area and sphere', () => {
    const bulletin = buildBulletin({
      facts: [fact(1, { sphere: 'regiao' })],
      municipality: 'Ilhéus',
      generatedAt,
    })
    expect(bulletin.highlights[0].eyebrow).toBe('Saúde · região')
  })

  it('renders an empty state without inventing facts', () => {
    const bulletin = buildBulletin({ facts: [], municipality: 'Ilhéus', generatedAt })
    expect(bulletin.highlights).toEqual([])
    expect(bulletin.moreItems).toEqual([])
    expect(bulletin.timeline.length).toBe(4)
  })

  it('maps every highlight and "e mais" item to a ledger fact (never invents)', () => {
    const facts = Array.from({ length: 25 }, (_value, index) => fact(index))
    const bulletin = buildBulletin({ facts, municipality: 'Ilhéus', generatedAt })
    const headlines = new Set(facts.map((row) => row.headline))
    expect(bulletin.highlights.length + bulletin.moreItems.length).toBe(
      BULLETIN_HIGHLIGHT_LIMIT + MUNICIPALITY_UNIT.bulletinMoreLimit,
    )
    expect(bulletin.highlights.every((row) => headlines.has(row.title))).toBe(true)
    expect(bulletin.moreItems.every((row) => headlines.has(row.label))).toBe(true)
  })
})