import { describe, expect, it } from 'vitest';
import { buildPier } from '../src/core/geometry';
import { solplateGeometry } from '../src/core/solplate';
import { loadP1 } from './helpers';

const model = buildPier(loadP1());
const front1 = model.blocks.filter((b) => b.row === '전열')[0];
const params = { A: 700, B: 640, margin: 100, T: 30, slopePct: -1.91 };

describe('솔플레이트 기하 (1단계, 승인 2026-10-23)', () => {
  it('L = A + 100 and W = B + 100 along the 교축 and the 교각축 직각', () => {
    const g = solplateGeometry(front1, 181, params);
    expect(g.L).toBeCloseTo(0.8, 6);
    expect(g.W).toBeCloseTo(0.74, 6);
  });

  it('the thick end T1 is on the 시점 side (−s): T1 ≈ 38, T2 ≈ 22 mm, and T1 + T2 = 2T', () => {
    const g = solplateGeometry(front1, 181, params);
    expect(g.T1 * 1000).toBeCloseTo(37.64, 1);
    expect(g.T2 * 1000).toBeCloseTo(22.36, 1);
    expect((g.T1 + g.T2) * 1000).toBeCloseTo(60, 6);
    // The top at the 시점 corners is the thick side.
    const topAtStart = g.corners.filter((c) => Math.abs(c[1] - (g.bottom + g.T1)) < 1e-9);
    expect(topAtStart.length).toBe(2);
  });

  it('the underside is the bearing top: block top (EL.X) + h3', () => {
    const g = solplateGeometry(front1, 181, params);
    expect(g.bottom).toBeCloseTo(front1.padTop + 0.181, 6);
  });

  it('volume = L·W·T (the taper averages to the centre thickness)', () => {
    const g = solplateGeometry(front1, 181, params);
    expect(g.volume).toBeCloseTo(g.L * g.W * 0.03, 9);
  });

  it('the solplate is centred on the block and follows the row direction', () => {
    const g = solplateGeometry(front1, 181, params);
    const c = g.corners.reduce((acc, p) => [acc[0] + p[0] / 8, acc[1] + p[2] / 8] as [number, number], [0, 0]);
    expect(c[0]).toBeCloseTo(front1.s, 6);
    expect(c[1]).toBeCloseTo(front1.n, 6);
  });
});