import assert from 'node:assert/strict'
import { readFile } from 'node:fs/promises'
import { join } from 'node:path'
import { test } from 'node:test'
import { fileURLToPath } from 'node:url'
import type { ChatViewRow, ServiceStatus, TimelineRow } from './api.ts'
import type { AnalysisRecord, AuditEvent, ChatMessageIn, DeploymentEventMirror } from './events.ts'
import type { SegmentSidecar } from './retention.ts'

/**
 * Snapshot tier (spec AC23): pin serialization contracts against a committed
 * golden file with deterministic values only (fixed ids, clocks, digests).
 * A golden change is a wire-contract change and needs a compatibility note.
 */

const here = fileURLToPath(new URL('.', import.meta.url))

const fixedEvent: AuditEvent = {
  id: '00000000-0000-4000-8000-000000000001',
  ts: '2026-09-12T00:00:00.000Z',
  kind: 'tool_execution_start',
  sessionId: 'session-1',
  provenance: { revision: 'rev-9', worktreeDirty: false },
  payload: { tool: 'bash', args: { command: 'ls' } },
}

const fixedChat: ChatMessageIn = {
  id: 'tg-1',
  chatId: -100,
  messageId: 42,
  direction: 'in',
  ts: '2026-09-12T00:00:00.000Z',
  updateId: 7,
  senderId: '5',
  senderName: 'friend',
  replyToMessageId: 41,
  triggerReason: 'mention',
  text: 'hello',
  media: [{ digest: 'a'.repeat(64), type: 'image/png', size: 12 }],
}

const fixedTimelineRow: TimelineRow = {
  seq: 3,
  id: fixedEvent.id,
  ts: fixedEvent.ts,
  kind: fixedEvent.kind,
  sessionId: fixedEvent.sessionId,
  provenance: fixedEvent.provenance,
  payload: fixedEvent.payload,
  archived: false,
}

const fixedChatRow: ChatViewRow = {
  id: fixedChat.id,
  chatId: fixedChat.chatId,
  messageId: fixedChat.messageId,
  direction: 'in',
  ts: fixedChat.ts,
  senderId: fixedChat.senderId,
  senderName: fixedChat.senderName,
  replyToMessageId: fixedChat.replyToMessageId,
  triggerReason: 'mention',
  text: fixedChat.text,
  media: fixedChat.media,
  hidden: false,
  archived: true,
}

const fixedDeploy: DeploymentEventMirror = {
  id: 'dep-1',
  ts: '2026-09-12T00:00:00.000Z',
  kind: 'probation-failed',
  revision: 'rev-9',
  detail: { probe: 'healthz', misses: 3 },
}

const fixedSidecar: SegmentSidecar = {
  version: 1,
  kind: 'audit',
  month: '2026-09',
  segment: 'seg-1',
  count: 2,
  firstId: 'a',
  lastId: 'b',
  firstTs: '2026-09-01T00:00:00.000Z',
  lastTs: '2026-09-02T00:00:00.000Z',
  sha256: '0'.repeat(64),
  bytes: 123,
}

const fixedAnalysis: AnalysisRecord = {
  digest: 'b'.repeat(64),
  capability: 'zai_analyze_media',
  model: 'glm-5.3-flash',
  schemaVersion: 1,
  result: { answer: 'a cat' },
  createdAt: '2026-09-12T00:00:00.000Z',
}

const fixedStatus: ServiceStatus = {
  ready: true,
  schemaVersion: 1,
  lastAuditSeq: 9,
  counts: { audit: 1, chat: 2, deployments: 3, media: 4 },
  dbSizeBytes: 1024,
  storage: { freeBytes: 1, totalBytes: 2, freePct: 50 },
  storageState: 'ok',
}

const actual = {
  auditEvent: fixedEvent,
  chatMessage: fixedChat,
  timelineRow: fixedTimelineRow,
  chatViewRow: fixedChatRow,
  deploymentEvent: fixedDeploy,
  archiveSidecar: fixedSidecar,
  mediaAnalysis: fixedAnalysis,
  serviceStatus: fixedStatus,
}

test('snapshot: wire contracts match the committed golden file', async () => {
  const golden = JSON.parse(await readFile(join(here, 'contracts.golden.json'), 'utf8')) as Record<
    string,
    unknown
  >
  assert.deepEqual(
    JSON.parse(JSON.stringify(actual)),
    golden,
    'wire contract drifted: update the golden with a compatibility note',
  )
})

test('snapshot: JSON serialization is stable across round trips', () => {
  for (const [name, value] of Object.entries(actual)) {
    const wire = JSON.stringify(value)
    const back = JSON.parse(wire)
    assert.deepEqual(back, value, `${name} round-trip drift`)
  }
})