import { describe, it, expect } from 'vitest'
import {
  DETAIL_TAB_BUDGET_ERR,
  DETAIL_TAB_BUDGET_WARN,
  DETAIL_SUMMARY_DEMAND_THRESHOLD,
  entityViewsFromPagespecFilenames,
  resolveDetailStrip,
} from '../detail-tab-strip.js'

const relTab = (key: string, extra: Record<string, unknown> = {}) => ({
  key,
  displayMode: 'table',
  relatedEntity: 'Invoice',
  relationFk: 'clientId',
  relatedModule: 'crm',
  relatedSection: 'invoices',
  ...extra,
})

describe('entityViewsFromPagespecFilenames', () => {
  it('groups <Entity>.<view>.md basenames into per-entity view sets', () => {
    const map = entityViewsFromPagespecFilenames([
      'Client.list.md', 'Client.detail.md', 'Client.form.md',
      'Invoice.list.md', 'notes.md', 'README.md',
    ])
    expect([...map.get('Client')!].sort()).toEqual(['detail', 'form', 'list'])
    expect([...map.get('Invoice')!]).toEqual(['list'])
    expect(map.has('notes')).toBe(false)
  })
})

describe('resolveDetailStrip — the rendered bar, never the authored JSON', () => {
  it('legacy strip: field tabs + strip related tabs, no synthetic info tab', () => {
    const r = resolveDetailStrip(
      { tabs: [{ key: 'a' }, { key: 'b' }], relatedTabs: [relTab('invoices')] },
      ['list', 'detail'],
    )
    expect(r.surface).toBe('legacy')
    expect(r.fieldTabCount).toBe(2)
    expect(r.syntheticInfoTab).toBe(false)
    expect(r.stripTotal).toBe(3)
  })

  it('the synthetic « info » trigger counts — it is a real trigger the reader sees', () => {
    const r = resolveDetailStrip(
      { relatedTabs: [relTab('invoices'), relTab('addresses', { relatedSection: 'addresses' })] },
      ['list', 'detail'],
    )
    expect(r.syntheticInfoTab).toBe(true)
    expect(r.stripTotal).toBe(3) // info + 2 related
  })

  it('band tabs never occupy the bar — derived (summary) and explicit placement alike', () => {
    const r = resolveDetailStrip(
      {
        tabs: [{ key: 'a' }],
        relatedTabs: [
          relTab('invoices'),
          relTab('insurances', { displayMode: 'summary' }),
          relTab('registrations', { displayMode: 'summary', placement: 'band' }),
        ],
      },
      ['list', 'detail'],
    )
    expect(r.bandCount).toBe(2)
    expect(r.stripRelatedCount).toBe(1)
    expect(r.stripTotal).toBe(2)
  })

  it("an explicit placement 'tab' opts a summary back into the bar", () => {
    const r = resolveDetailStrip(
      { tabs: [], relatedTabs: [relTab('insurances', { displayMode: 'summary', placement: 'tab' })] },
      ['list', 'detail'],
    )
    expect(r.bandCount).toBe(0)
    expect(r.stripRelatedCount).toBe(1)
    // Sole strip content is related → the synthetic info trigger appears too.
    expect(r.stripTotal).toBe(2)
  })

  it('a unified fiche zeroes the field-tab term (tabs[] render as section cards)', () => {
    const r = resolveDetailStrip(
      { tabs: [{ key: 'a' }, { key: 'b' }, { key: 'c' }], relatedTabs: [relTab('invoices')] },
      ['list', 'detail', 'form'],
    )
    expect(r.surface).toBe('unified')
    expect(r.fieldTabCount).toBe(0)
    expect(r.syntheticInfoTab).toBe(false)
    expect(r.stripTotal).toBe(1)
  })

  it("editExperience 'direct' keeps the legacy surface — field tabs count again", () => {
    const r = resolveDetailStrip(
      { editExperience: 'direct', tabs: [{ key: 'a' }], relatedTabs: [relTab('invoices')] },
      ['list', 'detail', 'form'],
    )
    expect(r.surface).toBe('legacy')
    expect(r.stripTotal).toBe(2)
  })

  it('undefined entityViews resolves legacy (the renderer contract for an unknown view set)', () => {
    const r = resolveDetailStrip({ tabs: [{ key: 'a' }] }, undefined)
    expect(r.surface).toBe('legacy')
    expect(r.stripTotal).toBe(1)
  })

  it('Zod-rejected related tabs are counted apart — never budget mass', () => {
    const r = resolveDetailStrip(
      { relatedTabs: [relTab('invoices'), { key: 'BAD KEY' }] },
      ['list', 'detail'],
    )
    expect(r.rejectedCount).toBe(1)
    expect(r.stripTotal).toBe(2) // info + invoices
  })

  it('exposes the budget thresholds as the numeric SSOT', () => {
    expect(DETAIL_TAB_BUDGET_WARN).toBe(7)
    expect(DETAIL_TAB_BUDGET_ERR).toBe(9)
    expect(DETAIL_SUMMARY_DEMAND_THRESHOLD).toBe(4)
  })
})