import test from 'node:test'
import assert from 'node:assert/strict'
import { readFile } from 'node:fs/promises'
import path from 'node:path'
import { fileURLToPath } from 'node:url'

const testDirectory = path.dirname(fileURLToPath(import.meta.url))
const workspace = path.resolve(testDirectory, '..', '..')
const manifestPath = path.join(workspace, 'design-pipeline', 'manifests', 'g01-background-candidates.json')
const wrapperPath = path.join(workspace, 'design-pipeline', 'scripts', 'build-g01-backgrounds.mjs')

test('G01 background candidate manifest preserves four portable masters and selects the approved long background', async () => {
  const manifest = JSON.parse(await readFile(manifestPath, 'utf8'))
  assert.equal(manifest.schemaVersion, 1)
  assert.equal(manifest.page, 'G01')
  assert.equal(manifest.status, 'long-flagship-selected-for-genealogy-module')
  assert.equal(manifest.selectedCandidateId, 'g01-list-background-long-flagship')
  assert.equal(manifest.runtimeOutput, 'static/assets/modules/genealogy/opaque/genealogy-page-background-long.png')
  assert.equal(manifest.candidates.length, 4)

  const ids = new Set()
  for (const candidate of manifest.candidates) {
    assert.ok(!ids.has(candidate.id), `duplicate candidate id: ${candidate.id}`)
    ids.add(candidate.id)
    assert.match(candidate.prompt, /\d+x\d+/)
    assert.ok(candidate.sourcePixels.width > 0 && candidate.sourcePixels.height > 0)
    assert.ok(['chroma-key', 'opaque-paper', 'opaque-paper-resize'].includes(candidate.processingMode))

    for (const key of ['master', 'generatedOutput']) {
      const absolute = path.resolve(workspace, candidate[key])
      const relative = path.relative(workspace, absolute)
      assert.ok(!relative.startsWith('..') && !path.isAbsolute(relative), `${key} escapes workspace`)
    }
  }

  const selected = manifest.candidates.find(({ id }) => id === manifest.selectedCandidateId)
  assert.deepEqual(selected.sourcePixels, { width: 1536, height: 3840 })
  assert.deepEqual(selected.outputPixels, { width: 1440, height: 3600 })
  assert.equal(selected.processingMode, 'opaque-paper-resize')
})

test('G01 Node wrapper delegates pixel decoding to locked Pillow without Sharp', async () => {
  const wrapper = await readFile(wrapperPath, 'utf8')
  assert.doesNotMatch(wrapper, /from ['"]sharp['"]/)
  assert.match(wrapper, /build_g01_backgrounds\.py/)
  assert.match(wrapper, /candidates\?\.length !== 4/)
})