/**
 * @module tests/integration/null-metadata-delete
 * @description The null-metadata delete skip is CLOSED. remove() used to
 * guard its index legs with `if (metadata)` — a row whose canonical
 * metadata was unreadable at delete time (torn, or a leg lost to an old
 * defect) kept its postings FOREVER, silently. Now: the JS index gets an
 * id-keyed cleanup (deleted bitmap + id mapper), the id-keyed native
 * contract is used when a provider offers it, and the one remaining
 * skip-shape (native without the contract) is narrated and tracked, never
 * silent. Pinned: a metadata-less row with live postings deletes cleanly
 * and leaves the query universe.
 */
import { describe, it, expect, afterEach } from 'vitest'
import { mkdtempSync, rmSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { Brainy } from '../../src/index.js'
import { NounType } from '../../src/types/graphTypes.js'

type RawBox = {
  storage: {
    readNounRaw(id: string): Promise<{ metadata: unknown; vector: unknown }>
    writeNounRaw(id: string, r: { metadata: unknown; vector: unknown }): Promise<void>
  }
}

const dirs: string[] = []
const brains: Brainy[] = []
afterEach(async () => {
  for (const b of brains.splice(0)) await b.close().catch(() => {})
  for (const d of dirs.splice(0)) rmSync(d, { recursive: true, force: true })
})

describe('null-metadata delete', () => {
  it('a row whose metadata leg is gone still deletes — id-keyed cleanup, no silent skip, gone from the query universe', async () => {
    const dir = mkdtempSync(join(tmpdir(), 'brainy-nullmeta-del-'))
    dirs.push(dir)
    const brain = new Brainy({ storage: { type: 'filesystem', path: dir }, requireSubtype: false, silent: true })
    await brain.init()
    brains.push(brain)

    const keep = await brain.add({ data: 'survivor', type: NounType.Document, metadata: { team: 'atlas' } })
    const victim = await brain.add({ data: 'doomed', type: NounType.Document, metadata: { team: 'atlas' } })
    await brain.flush()
    expect((await brain.find({ where: { team: 'atlas' } })).length).toBe(2)

    // Manufacture the shape: the victim's metadata leg vanishes behind the
    // engine's back (vector leg + postings stay live).
    const storage = (brain as unknown as RawBox).storage
    const raw = await storage.readNounRaw(victim)
    await storage.writeNounRaw(victim, { metadata: null, vector: raw.vector })

    // THE PIN: the delete neither throws nor silently strands postings.
    await brain.remove(victim)
    await brain.flush()

    const after = await brain.find({ where: { team: 'atlas' } })
    expect(after.length, 'victim left the query universe; survivor serves').toBe(1)
    expect(after[0].id).toBe(keep)
    expect(await brain.get(victim)).toBeNull()
  }, 120000)
})