/**
 * registry-guard — the takeover guard that keeps scaffold-component from
 * shipping a DEAD DUPLICATE page: a componentKey the live registry already
 * serves from another file (legacy app, pages outside the canonical
 * convention) must fail-close unless the spec consents with allowTakeover.
 */
import { describe, it, expect } from 'vitest'
import { checkRegistryCollisions } from '../registry-guard.js'

const EMITTED = new Map<string, string>([
  ['list', 'D:/app/web/src/pages/fleet/bikes/BikesListPage.tsx'],
  ['detail', 'D:/app/web/src/pages/fleet/bikes/BikeDetailPage.tsx'],
])

function byKey(entries: Array<[string, { file: string; resolvedAbsPath: string | null }]>) {
  return new Map(entries)
}

describe('checkRegistryCollisions', () => {
  it('flags a key served from a different page file', () => {
    const collisions = checkRegistryCollisions({
      byKey: byKey([
        ['fleet.bikes', { file: 'src/extensions/componentRegistry.generated.ts', resolvedAbsPath: 'D:/app/web/src/pages/fleet/bikes/FleetBikeListPage.tsx' }],
      ]),
      appCode: 'fleet',
      module: 'bikes',
      section: 'bikes',
      emittedByView: EMITTED,
    })
    expect(collisions).toHaveLength(1)
    expect(collisions[0]!.key).toBe('fleet.bikes')
    expect(collisions[0]!.view).toBe('list')
    expect(collisions[0]!.registeredFile).toContain('FleetBikeListPage')
  })

  it('passes when the registry already points at the emitted file (regenerate in place)', () => {
    const collisions = checkRegistryCollisions({
      byKey: byKey([
        ['fleet.bikes', { file: 'src/extensions/fleet-bikesRegistry.ts', resolvedAbsPath: 'D:\\app\\web\\src\\pages\\fleet\\bikes\\BIKESLISTPAGE.TSX' }],
      ]),
      appCode: 'fleet',
      module: 'bikes',
      section: 'bikes',
      emittedByView: EMITTED,
    })
    // path comparison is slash- and case-insensitive (win32)
    expect(collisions).toEqual([])
  })

  it('matches the routeParent 4-segment key shape', () => {
    const collisions = checkRegistryCollisions({
      byKey: byKey([
        ['fleet.bikes.maintenance.bikes.detail', { file: 'src/extensions/x.ts', resolvedAbsPath: 'D:/app/web/src/pages/legacy/Old.tsx' }],
      ]),
      appCode: 'fleet',
      module: 'bikes',
      section: 'bikes',
      emittedByView: EMITTED,
    })
    expect(collisions).toHaveLength(1)
    expect(collisions[0]!.view).toBe('detail')
  })

  it('ignores keys of other sections/modules and views this run does not emit', () => {
    const collisions = checkRegistryCollisions({
      byKey: byKey([
        ['fleet.stations', { file: 'src/extensions/x.ts', resolvedAbsPath: 'D:/app/web/src/pages/S.tsx' }],
        ['billing.bikes', { file: 'src/extensions/x.ts', resolvedAbsPath: 'D:/app/web/src/pages/B.tsx' }],
        ['fleet.bikes.create', { file: 'src/extensions/x.ts', resolvedAbsPath: 'D:/app/web/src/pages/F.tsx' }],
      ]),
      appCode: 'fleet',
      module: 'bikes',
      section: 'bikes',
      emittedByView: EMITTED, // no 'create' emitted
    })
    expect(collisions).toEqual([])
  })

  it('an unresolved live import is a collision too (the key serves a dead page)', () => {
    const collisions = checkRegistryCollisions({
      byKey: byKey([
        ['fleet.bikes', { file: 'src/extensions/componentRegistry.generated.ts', resolvedAbsPath: null }],
      ]),
      appCode: 'fleet',
      module: 'bikes',
      section: 'bikes',
      emittedByView: EMITTED,
    })
    expect(collisions).toHaveLength(1)
    expect(collisions[0]!.registeredFile).toContain('unresolved import')
  })

  it('empty registry (fresh app) — no collisions', () => {
    const collisions = checkRegistryCollisions({
      byKey: new Map(),
      appCode: 'fleet',
      module: 'bikes',
      section: 'bikes',
      emittedByView: EMITTED,
    })
    expect(collisions).toEqual([])
  })
})