import { readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import * as XLSX from 'xlsx';
import { describe, expect, it } from 'vitest';
import { parseAbutments } from '../src/core/abut/parse';
import { girderPairs, pairOf, type PairStructure, soleRowThickness } from '../src/core/bearing-pair';
import { loadP1 } from './helpers';

// RAG/받침방위각_솔플레이트검토.md §2 · §6 (Q-SH1·4·8·9). A1 from the RAG workbook's Abut sheet, P1 from the same input.
const RAG = fileURLToPath(new URL('../../../RAG/운곡교P1입력.xlsx', import.meta.url));
const a1 = parseAbutments(XLSX.read(readFileSync(RAG), { type: 'buffer' })).abutments[0];
const A1: PairStructure = { name: 'A1', bearings: a1.bearings.map((b) => ({ no: b.no, x: b.pos.e, y: b.pos.n, z: b.z, azimuthDeg: b.azimuthDeg! })) };
const p1 = loadP1();
const P1: PairStructure = { name: 'P1', bearings: p1.bearings.map((b) => ({ no: b.no, x: b.x, y: b.y, z: b.z, azimuthDeg: b.azimuthDeg })) };

describe('거더 짝 받침 · 종단경사 S (Q-SH1·4·5)', () => {
  const pairs = girderPairs([A1, P1]);

  it('pairs A1 ①–⑤ with P1 ①–⑤ on the girder line (offset 0.000 m, azimuth difference ≤ 0.1″)', () => {
    expect(pairs.map((p) => [p.from.no, p.to.no])).toEqual([[1, 1], [2, 2], [3, 3], [4, 4], [5, 5]]);
    for (const p of pairs) {
      expect(p.offsetM).toBeLessThan(0.0005);
      expect(p.fromCheckSec).toBeLessThanOrEqual(0.5);
      expect(p.distanceM).toBeCloseTo(48.791, 3);
      expect(p.warnings).toEqual([]);
    }
  });

  it('S = −1.908 / −1.906 / −1.904 / −1.904 / −1.902 % (상세도 −1.910 … −1.901, ≤ 0.002 %), A1 is the 오르막 쪽', () => {
    expect(pairs.map((p) => p.slopePct.toFixed(3))).toEqual(['-1.908', '-1.906', '-1.904', '-1.904', '-1.902']);
    const drawing = [-1.910, -1.907, -1.905, -1.903, -1.901];
    pairs.forEach((p, i) => expect(Math.abs(p.slopePct - drawing[i])).toBeLessThanOrEqual(0.0025));
    expect(pairs.every((p) => p.uphill === 'A1')).toBe(true);
  });

  it('P1 back row ⑥–⑩ (next span, P2 not in the workbook) has no pair', () => {
    for (const no of [6, 7, 8, 9, 10]) expect(pairOf(pairs, 'P1', no)).toBeUndefined();
    expect(pairOf(pairs, 'P1', 3)!.from).toEqual({ structure: 'A1', no: 3 });
  });

  it('WS01: P1 ③ azimuth typed as 75°59′ (CAD) is kept but flagged', () => {
    const typo: PairStructure = { ...P1, bearings: P1.bearings.map((b) => (b.no === 3 ? { ...b, azimuthDeg: 90 - (75 + 59 / 60) } : b)) };
    const p = girderPairs([A1, typo]).find((q) => q.to.no === 3)!;
    expect(p.warnings).toContain('WS01');
    expect(p.toCheckSec).toBeGreaterThan(10);
    expect(girderPairs([A1, typo]).filter((q) => q.to.no !== 3).every((q) => !q.warnings.includes('WS01'))).toBe(true);
  });

  it('WS04: two candidates within tolerance → the closest to the girder line is used', () => {
    const b1 = P1.bearings[0];
    const extra = { ...b1, no: 99, x: b1.x + 0.05 * Math.cos(b1.azimuthDeg * Math.PI / 180), y: b1.y - 0.05 * Math.sin(b1.azimuthDeg * Math.PI / 180) };
    const p = girderPairs([A1, { ...P1, bearings: [...P1.bearings, extra] }]).find((q) => q.from.no === 1)!;
    expect(p.warnings).toContain('WS04');
    expect(p.to.no).toBe(1);
  });
});

describe('솔플레이트 열 두께 (Q-SH3·8·9, L 800)', () => {
  it('S 1.908 % → T 30, T1 38 / T2 22 (P1 상세도)', () => {
    expect(soleRowThickness([{ lengthMm: 800, slopePct: -1.908 }])).toEqual({ T: 30, ends: [{ T1: 38, T2: 22 }] });
  });
  it('S 3 % → T 34, T1 46 / T2 22; S 0 → T 22', () => {
    expect(soleRowThickness([{ lengthMm: 800, slopePct: 3 }])).toEqual({ T: 34, ends: [{ T1: 46, T2: 22 }] });
    expect(soleRowThickness([{ lengthMm: 800, slopePct: 0 }]).T).toBe(22);
  });
  it('one T per row: the largest requirement wins, the flatter bearing gets a thicker T2', () => {
    const row = soleRowThickness([{ lengthMm: 800, slopePct: 3 }, { lengthMm: 800, slopePct: 1 }]);
    expect(row.T).toBe(34);
    expect(row.ends[1]).toEqual({ T1: 38, T2: 30 });
  });
});