import { randomUUID } from 'node:crypto';
import { describe, it, expect, beforeAll, afterAll, beforeEach } from 'vitest';
import { PrismaClient } from '@prisma/client';
import { makeFakePorts } from '@insignia/iios-testkit';
import { resetDb } from '../test-utils/reset-db';
import { ActorResolver } from '../identity/actor.resolver';
import { IngestService } from '../interactions/ingest.service';
import { RetentionService } from './retention.service';
import type { PrismaService } from '../prisma/prisma.service';

const url = process.env.DATABASE_URL ?? 'postgresql://iios:iios@localhost:5434/iios?schema=public';
const prisma = new PrismaClient({ datasources: { db: { url } } });
const asService = prisma as unknown as PrismaService;
const actors = new ActorResolver(asService);
const svc = () => new RetentionService(asService);

async function ingest(text: string, orgId = 'org_demo'): Promise<{ interactionId: string; scopeId: string }> {
  const res = await new IngestService(asService, makeFakePorts(), actors).ingest(
    {
      scope: { orgId, appId: 'portal-demo' },
      channel: { type: 'WEBHOOK', externalChannelId: 'webhook' },
      source: { handleKind: 'EXTERNAL_VISITOR', externalId: 'ext-1' },
      kind: 'MESSAGE',
      thread: { externalThreadId: `wh-${randomUUID().slice(0, 6)}` },
      parts: [{ kind: 'TEXT', bodyText: text }],
      occurredAt: new Date().toISOString(),
      providerEventId: `pe-${randomUUID()}`,
    },
    `ing-${randomUUID()}`,
  );
  const it = await prisma.iiosInteraction.findUniqueOrThrow({ where: { id: res.interactionId } });
  return { interactionId: res.interactionId, scopeId: it.scopeId };
}

const past = new Date(Date.now() - 86_400_000);
const future = new Date(Date.now() + 86_400_000);
const setSnapshot = (targetId: string, data: { archiveAfter?: Date; deleteAfter?: Date }) =>
  prisma.iiosRetentionPolicySnapshot.update({ where: { targetType_targetId: { targetType: 'interaction', targetId } }, data });
const bodyOf = async (interactionId: string) => (await prisma.iiosMessagePart.findFirstOrThrow({ where: { interactionId } })).bodyText;

beforeAll(async () => { await prisma.$connect(); });
afterAll(async () => { await prisma.$disconnect(); });
beforeEach(async () => { await resetDb(prisma); });

describe('RetentionService (P9 — retention sweep)', () => {
  it('ensureSnapshots captures one ACTIVE snapshot per interaction with archive < delete', async () => {
    const { interactionId } = await ingest('hello');
    await svc().ensureSnapshots();
    const snap = await prisma.iiosRetentionPolicySnapshot.findUniqueOrThrow({ where: { targetType_targetId: { targetType: 'interaction', targetId: interactionId } } });
    expect(snap.status).toBe('ACTIVE');
    expect(snap.dataClass).toBe('internal');
    expect(snap.archiveAfter.getTime()).toBeLessThan(snap.deleteAfter.getTime());
  });

  it('redacts an interaction whose delete window has passed', async () => {
    const { interactionId } = await ingest('my secret');
    await svc().ensureSnapshots();
    await setSnapshot(interactionId, { archiveAfter: past, deleteAfter: past });

    const res = await svc().applySweep();
    expect(res.redacted).toBe(1);
    expect(await bodyOf(interactionId)).toBe('[redacted]');
    expect((await prisma.iiosInteraction.findUniqueOrThrow({ where: { id: interactionId } })).status).toBe('REDACTED');
    expect((await prisma.iiosRetentionPolicySnapshot.findUniqueOrThrow({ where: { targetType_targetId: { targetType: 'interaction', targetId: interactionId } } })).status).toBe('REDACTED');
    expect(await prisma.iiosAuditLink.count({ where: { action: 'retention.redacted' } })).toBe(1);
  });

  it('archives (not deletes) when only the archive window has passed, then deletes later', async () => {
    const { interactionId } = await ingest('still needed');
    await svc().ensureSnapshots();
    await setSnapshot(interactionId, { archiveAfter: past, deleteAfter: future });

    let res = await svc().applySweep();
    expect(res).toMatchObject({ archived: 1, redacted: 0 });
    expect(await bodyOf(interactionId)).toBe('still needed'); // content untouched by archive

    await setSnapshot(interactionId, { deleteAfter: past });
    res = await svc().applySweep();
    expect(res.redacted).toBe(1);
    expect(await bodyOf(interactionId)).toBe('[redacted]');
  });

  it('an active compliance hold blocks the sweep until released', async () => {
    const { interactionId, scopeId } = await ingest('held content');
    await svc().ensureSnapshots();
    await setSnapshot(interactionId, { archiveAfter: past, deleteAfter: past });
    const hold = await prisma.iiosComplianceHold.create({ data: { scopeId, targetType: 'message', targetId: interactionId, holdReason: 'legal' } });

    let res = await svc().applySweep();
    expect(res).toMatchObject({ redacted: 0, skippedHeld: 1 });
    expect(await bodyOf(interactionId)).toBe('held content');

    await prisma.iiosComplianceHold.update({ where: { id: hold.id }, data: { status: 'RELEASED' } });
    res = await svc().applySweep();
    expect(res.redacted).toBe(1);
    expect(await bodyOf(interactionId)).toBe('[redacted]');
  });

  it('is idempotent — a REDACTED snapshot is terminal', async () => {
    const { interactionId } = await ingest('x');
    await svc().ensureSnapshots();
    await setSnapshot(interactionId, { archiveAfter: past, deleteAfter: past });
    await svc().applySweep();
    expect(await svc().applySweep()).toMatchObject({ archived: 0, redacted: 0, skippedHeld: 0 });
  });

  it('sweep is tenant-scoped', async () => {
    const a = await ingest('tenant a', 'org_A');
    const b = await ingest('tenant b', 'org_B');
    await svc().ensureSnapshots();
    await setSnapshot(a.interactionId, { archiveAfter: past, deleteAfter: past });
    await setSnapshot(b.interactionId, { archiveAfter: past, deleteAfter: past });

    const res = await svc().applySweep(a.scopeId);
    expect(res.redacted).toBe(1);
    expect(await bodyOf(a.interactionId)).toBe('[redacted]');
    expect(await bodyOf(b.interactionId)).toBe('tenant b'); // scope B untouched
  });
});