import { createHash } from 'node:crypto'
import { readFile, stat, writeFile } from 'node:fs/promises'
import { resolve } from 'node:path'

const root = resolve(new URL('..', import.meta.url).pathname)
const sourcePath = resolve(root, '.cache/freecad/reference-desktop.json')
const outputPath = resolve(root, 'config/freecad-native-property-semantics.json')
const harnessPath = resolve(root, 'scripts/run-freecad-native-property-semantics.mjs')
const sourceContent = await readFile(sourcePath)
const source = JSON.parse(sourceContent)
const fail = (message) => { throw new Error(`FreeCAD native property semantics probe failed: ${message}`) }

if (source.schemaVersion !== 1 || source.freecadVersion !== '1.1.1' || source.gitCommit !== '0108fd4b4850cc46e625b60e53cea7a7bbe69f8d') fail('desktop oracle is not the locked FreeCAD baseline')
const runtime = source.runtimeObjects
if (!runtime?.available || runtime.candidateCount !== 352 || runtime.availableCount !== 348 || runtime.unavailableCount !== 4 || !Array.isArray(runtime.types)) fail('runtime Document.supportedTypes inventory is incomplete')

const editableTypes = new Set([
  'App::PropertyAcceleration', 'App::PropertyAngle', 'App::PropertyArea', 'App::PropertyBool', 'App::PropertyBoolList', 'App::PropertyColor', 'App::PropertyColorList', 'App::PropertyDistance', 'App::PropertyEnumeration',
  'App::PropertyFloat', 'App::PropertyFloatConstraint', 'App::PropertyFloatList', 'App::PropertyInteger', 'App::PropertyIntegerConstraint',
  'App::PropertyIntegerList', 'App::PropertyLength', 'App::PropertyLink', 'App::PropertyLinkHidden', 'App::PropertyLinkList',
  'App::PropertyLinkSub', 'App::PropertyLinkSubList', 'App::PropertyPlacement', 'App::PropertyString',
  'App::PropertyPrecision', 'App::PropertyQuantityConstraint', 'App::PropertyStringList', 'App::PropertyVector', 'App::PropertyDirection', 'App::PropertyFile', 'App::PropertyFileIncluded',
])
const specializedTypes = new Set([
  'App::PropertyExpressionEngine', 'Part::PropertyGeometryList', 'Part::PropertyPartShape',
  'Path::PropertyPath', 'Sketcher::PropertyConstraintList',
])
const numericStatusNames = new Map([
  [13, 'Ordered'], [22, 'PropNoPersist'], [23, 'PropNoRecompute'], [24, 'PropReadOnly'],
  [25, 'PropTransient'], [26, 'PropHidden'], [27, 'PropOutput'],
])
const facadeBehaviorStatusNames = new Set([
  'Hidden', 'Immutable', 'LockDynamic', 'NoModify', 'Ordered', 'Output', 'PartialTrigger',
  'PropHidden', 'PropNoPersist', 'PropNoRecompute', 'PropOutput', 'PropReadOnly', 'PropTransient',
  'ReadOnly', 'Transient',
])
const normalizeStatus = (status) => status.map((entry) => typeof entry === 'number' ? (numericStatusNames.get(entry) ?? `UnknownBit${entry}`) : entry)
const properties = runtime.types.flatMap((object) => (object.properties ?? []).map((property) => ({ ...property, objectTypeId: object.typeId, status: normalizeStatus(property.status) })))
if (properties.length !== 5510 || properties.some((property) => !property.name || !property.typeId || !Array.isArray(property.status))) fail('runtime property records are incomplete')

const byType = new Map()
for (const property of properties) {
  const entry = byType.get(property.typeId) ?? { typeId: property.typeId, recordCount: 0, objectTypeIds: new Set(), statusNames: new Set() }
  entry.recordCount += 1
  entry.objectTypeIds.add(property.objectTypeId)
  property.status.forEach((status) => entry.statusNames.add(status))
  byType.set(property.typeId, entry)
}
const types = [...byType.values()].sort((left, right) => left.typeId.localeCompare(right.typeId)).map((entry) => ({
  typeId: entry.typeId,
  support: editableTypes.has(entry.typeId) ? 'native-editable-codec' : specializedTypes.has(entry.typeId) ? 'native-specialized-codec' : 'opaque-fcstd-proxy',
  recordCount: entry.recordCount,
  objectTypeCount: entry.objectTypeIds.size,
  statusNames: [...entry.statusNames].sort(),
}))
const supportSummary = Object.fromEntries(['native-editable-codec', 'native-specialized-codec', 'opaque-fcstd-proxy'].map((support) => {
  const selected = types.filter((entry) => entry.support === support)
  return [support, { typeCount: selected.length, recordCount: selected.reduce((total, entry) => total + entry.recordCount, 0) }]
}))
const observedStatuses = [...new Set(properties.flatMap((property) => property.status))].sort()
const preservedOnlyStatusNames = observedStatuses.filter((status) => !facadeBehaviorStatusNames.has(status))
const preservedOnlyStatusRecordCount = properties.filter((property) => property.status.some((status) => preservedOnlyStatusNames.includes(status))).length
const unavailableObjects = runtime.types.filter(({ available }) => !available).map(({ typeId, error }) => ({ typeId, error }))
const harnessContent = await readFile(harnessPath)
const opaqueSupport = supportSummary['opaque-fcstd-proxy']
const exactPromotionReady = opaqueSupport.typeCount === 0 && opaqueSupport.recordCount === 0
const exactBlocker = exactPromotionReady ? null : `${opaqueSupport.typeCount} runtime property types and ${opaqueSupport.recordCount} records remain opaque-only; complete native document and property semantics`
const report = {
  schemaVersion: 1,
  status: 'pass',
  baseline: { freecadVersion: source.freecadVersion, commit: source.gitCommit },
  source: { path: '.cache/freecad/reference-desktop.json', bytes: sourceContent.length, sha256: createHash('sha256').update(sourceContent).digest('hex') },
  runtime: { registeredObjectTypes: runtime.candidateCount, instantiableObjectTypes: runtime.availableCount, unavailableObjectTypes: runtime.unavailableCount, unavailableObjects, propertyRecords: properties.length, propertyTypes: types.length },
  supportSummary,
  types,
  propertyStatus: {
    observed: observedStatuses,
    facadeNative: observedStatuses,
    behaviorNative: [...facadeBehaviorStatusNames].sort(),
    preservedOnly: preservedOnlyStatusNames,
    preservedOnlyRecordCount: preservedOnlyStatusRecordCount,
    proxyOnly: [],
    proxyOnlyRecordCount: 0,
    unknownNumericBits: observedStatuses.filter((status) => status.startsWith('UnknownBit')),
  },
  harness: { path: 'scripts/run-freecad-native-property-semantics.mjs', bytes: (await stat(harnessPath)).size, sha256: createHash('sha256').update(harnessContent).digest('hex') },
  exactPromotionReady,
  exactBlocker,
  generatedAt: new Date().toISOString(),
}
await writeFile(outputPath, `${JSON.stringify(report, null, 2)}\n`)
console.log(JSON.stringify({ status: report.status, runtime: report.runtime, supportSummary, propertyStatus: report.propertyStatus, exactPromotionReady, exactBlocker }, null, 2))