import { test } from 'node:test'
import assert from 'node:assert/strict'
import { mkdtemp, readFile, rm, writeFile } from 'node:fs/promises'
import { tmpdir } from 'node:os'
import { resolve } from 'node:path'
import { readSurfaceDefaults, updateSurfaceDefaults, validateSurfaceDefaults } from './surface-defaults.mjs'

const initial = {
  schemaVersion: 1,
  finishes: {
    'Printed ink': { finishStrength: 0.6 }, Foil: { finishStrength: 1 },
    Holographic: { finishStrength: 0.33 }, 'Gold leaf': { finishStrength: 0.6 },
    'Frosted glass': { finishStrength: 0.6 },
  },
  materials: {
    Paper: { surfaceDetail: 0.14, roughness: 0.23 },
    Linen: { surfaceDetail: 0.05, roughness: 0.23 },
    Metal: { surfaceDetail: 1, roughness: 0.23, metalBrushHorizontal: false },
    Wood: { surfaceDetail: 0.14, roughness: 0.23 },
    Leather: { surfaceDetail: 0.45, roughness: 0.23 },
  },
}

test('surface defaults validate requested finish/material strengths and reject unknown settings', () => {
  assert.equal(validateSurfaceDefaults(structuredClone(initial)).finishes.Holographic.finishStrength, 0.33)
  const malformed = structuredClone(initial)
  malformed.materials.Linen.shaderSecret = 1
  assert.throws(() => validateSurfaceDefaults(malformed), /Unsupported setting/)
})

test('surface default saves are atomic, scoped, and revision checked', async (t) => {
  const directory = await mkdtemp(resolve(tmpdir(), 'surface-defaults-'))
  t.after(() => rm(directory, { recursive: true }))
  const path = resolve(directory, 'defaults.json')
  await writeFile(path, `${JSON.stringify(initial, null, 2)}\n`)
  const before = await readSurfaceDefaults(true, path)
  const after = await updateSurfaceDefaults({ revision: before.revision, group: 'finish',
    name: 'Holographic', values: { finishStrength: 0.41 } }, path)
  assert.equal(after.defaults.finishes.Holographic.finishStrength, 0.41)
  assert.deepEqual(after.defaults.materials, initial.materials)
  assert.notEqual(after.revision, before.revision)
  await assert.rejects(updateSurfaceDefaults({ revision: before.revision, group: 'material',
    name: 'Linen', values: { surfaceDetail: 0.08, roughness: 0.23 } }, path), /changed since/)
  assert.doesNotMatch(await readFile(path, 'utf8'), /\.tmp/)
})