import { describe, it, expect } from 'vitest';
import * as m from '../../src/lib/core/math.js';
import { prepareInventoryMetadata } from '../../src/lib/core/inventory.js';

describe('prepareInventoryMetadata', () => {
  it('calculates correct metadata for a 21in x 12in slab at 1.75in thick', () => {
    const Lpx = 3360, L = 21, scale = 160, thickness = 1.75;
    const widthPx = 1920; // 12in
    const maskPx = Lpx * widthPx; // 6,451,200

    const result = prepareInventoryMetadata(
      maskPx,
      scale,
      L,
      thickness,
      [1600, 1920, 2080, 1600]
    );

    // sqft = (6,451,200 / 160^2) / 144 = 1.75
    expect(result.sqft).toBe(1.75);
    // bdft = 1.75 * 1.75 = 3.0625 -> 3.06
    expect(result.bdft).toBe(3.06);
    expect(result.lengthIn).toBe(21);
    expect(result.thicknessIn).toBe(1.75);
    expect(result.minWidth).toBe(10);
    expect(result.maxWidth).toBe(13);
    expect(result.avgWidth).toBe(11.25);
  });

  it('handles zero area', () => {
    const result = prepareInventoryMetadata(0, 160, 21, 1.75, []);
    expect(result.sqft).toBe(0);
    expect(result.bdft).toBe(0);
  });
});