/**
 * Storage root-directory resolution from `StorageOptions`.
 *
 * `storage: { type: 'filesystem', path: '…' }` is a widely-used, doc-promoted
 * config shape. A refactor once dropped the top-level `path` key from the
 * resolution chain, so it was silently ignored and every brain wrote to the
 * default `./brainy-data` instead — a quiet data-misplacement footgun on
 * upgrade. These tests pin every accepted spelling to the directory it must
 * resolve to.
 */
import { describe, it, expect } from 'vitest'
import { createStorage } from '../../../src/storage/storageFactory.js'

/** Read the resolved root directory off the concrete FileSystemStorage. */
function rootDirOf(storage: unknown): string {
  return (storage as { rootDir: string }).rootDir
}

describe('createStorage — filesystem root-directory resolution', () => {
  it('honors top-level rootDirectory', async () => {
    const storage = await createStorage({ type: 'filesystem', rootDirectory: '/tmp/brainy-rd' })
    expect(rootDirOf(storage)).toBe('/tmp/brainy-rd')
  })

  it('honors top-level path (the documented shorthand)', async () => {
    const storage = await createStorage({ type: 'filesystem', path: '/tmp/brainy-path' })
    expect(rootDirOf(storage)).toBe('/tmp/brainy-path')
  })

  it('honors nested options.rootDirectory', async () => {
    const storage = await createStorage({ type: 'filesystem', options: { rootDirectory: '/tmp/brainy-ord' } })
    expect(rootDirOf(storage)).toBe('/tmp/brainy-ord')
  })

  it('honors nested options.path', async () => {
    const storage = await createStorage({ type: 'filesystem', options: { path: '/tmp/brainy-opath' } })
    expect(rootDirOf(storage)).toBe('/tmp/brainy-opath')
  })

  it('prefers top-level rootDirectory over a nested options.path', async () => {
    const storage = await createStorage({
      type: 'filesystem',
      rootDirectory: '/tmp/brainy-win',
      options: { path: '/tmp/brainy-lose' }
    })
    expect(rootDirOf(storage)).toBe('/tmp/brainy-win')
  })

  it('falls back to ./brainy-data only when no directory is supplied', async () => {
    const storage = await createStorage({ type: 'filesystem' })
    expect(rootDirOf(storage)).toBe('./brainy-data')
  })
})