/**
 * Task 2 — ensureSystemRoots (TDD).
 * Task 3 — ensureEntityFolder (TDD).
 *
 * Fixture convention: makePort from helpers/factories (async DB insert);
 * TEST_USER_ID resolved once via beforeAll from a seeded user — same pattern
 * as document-folders-crud.test.ts and alerts-tenant-isolation.test.ts.
 */

import { describe, it, expect, beforeAll, beforeEach } from 'vitest';
import { and, eq } from 'drizzle-orm';

import { db } from '@/lib/db';
import { documentFolders } from '@/lib/db/schema/documents';
import { clients } from '@/lib/db/schema/clients';
import { user } from '@/lib/db/schema/users';
import { ensureSystemRoots, ensureEntityFolder } from '@/lib/services/document-folders.service';
import { makePort } from '../helpers/factories';

let TEST_USER_ID = '';

beforeAll(async () => {
  const [u] = await db.select({ id: user.id }).from(user).limit(1);
  if (!u) throw new Error('No user available; run pnpm db:seed first');
  TEST_USER_ID = u.id;
});

describe('document-folders service · ensureSystemRoots', () => {
  let portId: string;

  beforeEach(async () => {
    const port = await makePort();
    portId = port.id;
    await db.delete(documentFolders).where(eq(documentFolders.portId, portId));
  });

  it('creates Clients, Companies, and Yachts root folders with system_managed=true', async () => {
    await ensureSystemRoots(portId, TEST_USER_ID);
    const rows = await db
      .select()
      .from(documentFolders)
      .where(and(eq(documentFolders.portId, portId), eq(documentFolders.entityType, 'root')));
    expect(rows.map((r) => r.name).sort()).toEqual(['Clients', 'Companies', 'Yachts']);
    for (const r of rows) {
      expect(r.systemManaged).toBe(true);
      expect(r.parentId).toBeNull();
      expect(r.entityId).toBeNull();
    }
  });

  it('is idempotent — second call does not create duplicates', async () => {
    await ensureSystemRoots(portId, TEST_USER_ID);
    await ensureSystemRoots(portId, TEST_USER_ID);
    const rows = await db
      .select()
      .from(documentFolders)
      .where(and(eq(documentFolders.portId, portId), eq(documentFolders.entityType, 'root')));
    expect(rows).toHaveLength(3);
  });

  it('returns the three root rows in a stable order (Clients, Companies, Yachts)', async () => {
    const roots = await ensureSystemRoots(portId, TEST_USER_ID);
    expect(roots.map((r) => r.name)).toEqual(['Clients', 'Companies', 'Yachts']);
  });
});

describe('document-folders service · ensureEntityFolder', () => {
  let portId: string;
  let clientId: string;
  let rootId: string;

  beforeEach(async () => {
    const port = await makePort();
    portId = port.id;
    await db.delete(documentFolders).where(eq(documentFolders.portId, portId));
    const roots = await ensureSystemRoots(portId, TEST_USER_ID);
    rootId = roots.find((r) => r.name === 'Clients')!.id;

    const [client] = await db
      .insert(clients)
      .values({
        portId,
        fullName: `Smith, John ${crypto.randomUUID().slice(0, 8)}`,
      })
      .returning();
    clientId = client!.id;
  });

  it('creates a subfolder under the matching system root with system_managed=true', async () => {
    const folder = await ensureEntityFolder(portId, 'client', clientId, TEST_USER_ID);
    expect(folder.systemManaged).toBe(true);
    expect(folder.entityType).toBe('client');
    expect(folder.entityId).toBe(clientId);
    expect(folder.parentId).toBe(rootId);
    // name is the client's fullName verbatim
    const [row] = await db.select().from(clients).where(eq(clients.id, clientId));
    expect(folder.name).toBe(row!.fullName);
  });

  it('is idempotent — returns the same row on second call', async () => {
    const a = await ensureEntityFolder(portId, 'client', clientId, TEST_USER_ID);
    const b = await ensureEntityFolder(portId, 'client', clientId, TEST_USER_ID);
    expect(a.id).toBe(b.id);
    const all = await db
      .select()
      .from(documentFolders)
      .where(
        and(eq(documentFolders.entityType, 'client'), eq(documentFolders.entityId, clientId)),
      );
    expect(all).toHaveLength(1);
  });

  it('appends a numeric suffix on name collision with an existing folder', async () => {
    // Insert a second client with the exact same fullName as the first.
    const [firstClient] = await db
      .select()
      .from(clients)
      .where(eq(clients.id, clientId));
    const sharedName = firstClient!.fullName;

    const [collidingClient] = await db
      .insert(clients)
      .values({
        portId,
        fullName: sharedName,
      })
      .returning();

    await ensureEntityFolder(portId, 'client', clientId, TEST_USER_ID);
    const second = await ensureEntityFolder(portId, 'client', collidingClient!.id, TEST_USER_ID);
    expect(second.name).toBe(`${sharedName} (2)`);
  });

  it('rejects unknown entity types', async () => {
    await expect(
      // @ts-expect-error -- runtime check
      ensureEntityFolder(portId, 'boat', clientId, TEST_USER_ID),
    ).rejects.toThrow(/entity type/i);
  });
});