import type pg from 'pg';
import { afterAll, beforeAll, describe, expect, it } from 'vitest';
import { createPool } from '../../infrastructure/db/pool.js';
import {
  getTestDbUrl,
  recreateDatabase,
  runMigrations,
} from '../../infrastructure/db/tests/db-test-support.js';
import { DEFAULT_STORE_ID } from '../../modules/inventory/index.js';

const hasDb = Boolean(process.env.TEST_DATABASE_URL);

describe.skipIf(!hasDb)('F-144 reporting store/VAT/cost/shipping snapshots (real PostgreSQL)', () => {
  const url = hasDb ? getTestDbUrl() : '';
  let pool: pg.Pool;

  beforeAll(async () => {
    await recreateDatabase(url);
    await runMigrations(url, 'up');
    pool = createPool(url);
  });

  afterAll(async () => {
    await pool.end();
  });

  async function columnInfo(table: string, column: string) {
    return pool.query(
      'SELECT column_name, is_nullable, column_default FROM information_schema.columns WHERE table_name = $1 AND column_name = $2',
      [table, column],
    );
  }

  it('adds store_id to orders_orders as NOT NULL w/ default store + FK + index (AC1)', async () => {
    const col = (await columnInfo('orders_orders', 'store_id')).rows[0];
    expect(col).toBeDefined();
    expect(col.is_nullable).toBe('NO');
    expect(col.column_default).toMatch(DEFAULT_STORE_ID);

    const fk = (
      await pool.query(
        "SELECT conname, contype FROM pg_constraint WHERE conrelid = 'orders_orders'::regclass AND conname = 'orders_orders_store_id_fkey'",
      )
    ).rows[0];
    expect(fk).toBeDefined();
    expect(fk.contype).toBe('f'); // foreign key

    const idx = (
      await pool.query(
        "SELECT indexname FROM pg_indexes WHERE tablename = 'orders_orders' AND indexname = 'orders_orders_store_id_created_at_idx'",
      )
    ).rows[0];
    expect(idx).toBeDefined();

    // New inserts inherit the default store without app-layer changes.
    // `source = 'pos'` is provided to satisfy the 047 CHECK
    // (source = 'pos' OR user_id IS NOT NULL) without touching store_id.
    const inserted = (
      await pool.query("INSERT INTO orders_orders (source) VALUES ('pos') RETURNING store_id, shipping_cents")
    ).rows[0];
    expect(inserted.store_id).toBe(DEFAULT_STORE_ID);
    expect(inserted.shipping_cents).toBe(0);
  });

  it('adds shipping_cents to orders_orders as NOT NULL DEFAULT 0 (AC2)', async () => {
    const col = (await columnInfo('orders_orders', 'shipping_cents')).rows[0];
    expect(col).toBeDefined();
    expect(col.is_nullable).toBe('NO');
    expect(col.column_default).toContain('0');
  });

  it('adds cost_at_sale_cents and vat_rate snapshots to orders_items as nullable — no history rewrite (AC3)', async () => {
    const cost = (await columnInfo('orders_items', 'cost_at_sale_cents')).rows[0];
    expect(cost).toBeDefined();
    expect(cost.is_nullable).toBe('YES');

    const vat = (await columnInfo('orders_items', 'vat_rate')).rows[0];
    expect(vat).toBeDefined();
    expect(vat.is_nullable).toBe('YES');
  });
});