import { bookingTonsSql } from './booking-tons.sql';

describe('bookingTonsSql', () => {
  const sql = bookingTonsSql('b');

  // The regression this exists for: a plain COALESCE stops at the portal's
  // literal 0 for container bookings and reports them as weighing nothing.
  it('treats a stored 0 as "no figure" on both booking-level columns', () => {
    expect(sql).toContain('NULLIF(b.bulk_total_weight_tons, 0)');
    expect(sql).toContain('NULLIF(b.cargo_total_weight_vgm, 0)');
  });

  it('falls back to the per-line container VGM, excluding soft-deleted lines', () => {
    expect(sql).toContain('SUM(bc.total_vgm_tons)');
    expect(sql).toContain('freight.booking_container bc');
    expect(sql).toContain('bc.booking_id = b.id');
    expect(sql).toContain('bc.deleted_at IS NULL');
  });

  it('never returns NULL, so callers may SUM it directly', () => {
    expect(sql.trimEnd().endsWith('0)')).toBe(true);
  });

  it('rewrites every reference when embedded under another alias', () => {
    const aliased = bookingTonsSql('bk');
    expect(aliased).not.toMatch(/\bb\./);
    expect(aliased).toContain('bk.cargo_total_weight_vgm');
    expect(aliased).toContain('bc.booking_id = bk.id');
  });
});