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 });
  });
});

describe('교량 전체 짝 받침 (bridgePairs, 구조물 순서 A1 · P1 … · A2)', () => {
  it('builds the same A1 ↔ P1 pairs from the loaded records', async () => {
    const { bridgePairs } = await import('../src/core/bridge-pairs');
    const pairs = bridgePairs([p1], [a1]);
    expect(pairs.map((p) => `${p.from.structure}${p.from.no}-${p.to.structure}${p.to.no}`)).toEqual(['A11-P11', 'A12-P12', 'A13-P13', 'A14-P14', 'A15-P15']);
  });
});

describe('짝 받침 성립 범위 (검토 2026-11-06)', () => {
  // A2 made from A1: each bearing moved 30 m along its girder and 0.6 m lower (S −2 %).
  const a2 = { ...a1, name: 'A2', type: 'A2' as const, bearings: a1.bearings.map((b) => {
    const t = (b.azimuthDeg! * Math.PI) / 180;
    return { ...b, pos: { e: b.pos.e + 30 * Math.sin(t), n: b.pos.n + 30 * Math.cos(t) }, z: b.z - 0.6 };
  }) };

  it('A1 and A2 only (one span, no pier): A1 ①–⑤ pair with A2 ①–⑤, S −2 %', async () => {
    const { bridgePairs } = await import('../src/core/bridge-pairs');
    const pairs = bridgePairs([], [a1, a2]);
    expect(pairs.map((p) => `${p.from.structure}${p.from.no}-${p.to.structure}${p.to.no}`)).toEqual(['A11-A21', 'A12-A22', 'A13-A23', 'A14-A24', 'A15-A25']);
    expect(pairs.every((p) => Math.abs(p.slopePct + 2) < 1e-6 && p.warnings.length === 0)).toBe(true);
  });

  it('A1 and P1 only: the front row ①–⑤ is computed from A1, the back row ⑥–⑩ takes the assumed front value (가정, WS03)', async () => {
    const { bridgePairs } = await import('../src/core/bridge-pairs');
    const { buildPier } = await import('../src/core/geometry');
    const m = buildPier(p1, { pairs: bridgePairs([p1], [a1]) });
    const front = m.soles.filter((s) => s.row === '전열'), back = m.soles.filter((s) => s.row === '후열');
    expect(front.every((s) => s.slopeSource === '계산' && s.pair?.structure === 'A1')).toBe(true);
    expect(back.every((s, i) => s.slopeSource === '가정' && !s.pair && s.slopePct === front[i].slopePct && s.warnings.includes('WS03'))).toBe(true);
  });

  it('straight bridge: a back row on the same girder lines is not taken for the A1 partner (the nearest along the girder is)', () => {
    const straight: PairStructure = { name: 'P1', bearings: P1.bearings.map((b) => {
      if (b.no <= 5) return b;
      const f = P1.bearings.find((q) => q.no === b.no - 5)!;
      const t = (f.azimuthDeg * Math.PI) / 180;
      return { ...b, azimuthDeg: f.azimuthDeg, x: f.x + 1.2 * Math.sin(t), y: f.y + 1.2 * Math.cos(t) };
    }) };
    const pairs = girderPairs([A1, straight]);
    expect(pairs.map((p) => p.to.no)).toEqual([1, 2, 3, 4, 5]);
    expect(pairs.every((p) => p.warnings.length === 0)).toBe(true);
  });
});

describe('교대만 있는 프로젝트 (가져오기 허용 2026-11-06)', () => {
  it('a project file with no pier and A1 only round-trips', async () => {
    const { parseProject, serializeProject, SCHEMA_VERSION } = await import('../src/core/project');
    const file = { schemaVersion: SCHEMA_VERSION, project: { name: '교대만', bridge: '', client: '', author: '', crs: '', memo: '' },
      source: { fileName: '운곡교P1입력.xlsx', sheets: [] }, history: [], piers: [], abutments: [a1] };
    const back = parseProject(serializeProject(file as Parameters<typeof serializeProject>[0]));
    expect(back.piers).toEqual([]);
    expect(back.abutments?.map((a) => a.name)).toEqual(['A1']);
  });
});

describe('두 노선 (광주 · 완도) — 목록 순서와 무관하게 거더 기하로 짝 (2026-11-06)', () => {
  it('A1-광주, A1-완도, P1-완도, P1-광주 in that order still pair 광주 with 광주 and 완도 with 완도', () => {
    const shift = (s: PairStructure, name: string, de: number): PairStructure => ({ name, bearings: s.bearings.map((b) => ({ ...b, x: b.x + de })) });
    const list = [shift(A1, 'A1-광주', 13), shift(A1, 'A1-완도', 0), shift(P1, 'P1-완도', 0), shift(P1, 'P1-광주', 13)];
    const pairs = girderPairs(list);
    expect(pairs).toHaveLength(10);
    expect(pairs.every((p) => p.from.structure.slice(3) === p.to.structure.slice(3) && p.from.structure.startsWith('A1') && p.from.no === p.to.no)).toBe(true);
  });
});

describe('교대만 (교각 0기): A1 ↔ A2 현 짝 (검토 2026-11-06)', () => {
  // Circular arc: A2_i lies at chord azimuth θ_i − δ, 350 m away, with azimuth θ_i − 2δ (the chord is the mean azimuth).
  const curved = (rec: typeof a1, name: string, type: 'A1' | 'A2', de = 0) => ({ ...rec, name, type, bearings: rec.bearings.map((b) => {
    const delta = 4, t = ((b.azimuthDeg! - delta) * Math.PI) / 180;
    return type === 'A1' ? { ...b, pos: { e: b.pos.e + de, n: b.pos.n } }
      : { ...b, azimuthDeg: b.azimuthDeg! - 2 * delta, pos: { e: b.pos.e + de + 350 * Math.sin(t), n: b.pos.n + 350 * Math.cos(t) }, z: b.z - 6.65 };
  }) });
  const abuts = [curved(a1, 'A1-광주', 'A1', 13), curved(a1, 'A1-완도', 'A1'), curved(a1, 'A2-광주', 'A2', 13), curved(a1, 'A2-완도', 'A2')];

  it('two curved lines without piers: each A1 bearing pairs with the same number on its own line\'s A2 (현), S = Δz / chord', async () => {
    const { bridgePairs } = await import('../src/core/bridge-pairs');
    const pairs = bridgePairs([], abuts);
    expect(pairs).toHaveLength(10);
    expect(pairs.every((p) => p.kind === 'chord' && p.from.structure.slice(3) === p.to.structure.slice(3) && p.from.no === p.to.no && p.warnings.length === 0)).toBe(true);
    expect(pairs.every((p) => p.fromCheckSec < 1 && Math.abs(p.slopePct + 1.9) < 1e-6)).toBe(true);
  });

  it('the 교대 card shows the 현 pair: A1-광주 ① ↔ A2-광주-① (현), S 계산', async () => {
    const { bridgePairs } = await import('../src/core/bridge-pairs');
    const { abutSolplateRows, resolveBearingRule } = await import('../src/core/abut/bearing-table');
    const { buildAbut } = await import('../src/core/abut/geometry');
    const { toAbutInput } = await import('../src/core/abut/parse');
    const rec = abuts[0];
    const rows = abutSolplateRows(buildAbut(toAbutInput(rec)), resolveBearingRule(), rec.bearingHeightMm, { pairs: bridgePairs([], abuts), slopeI: rec.slopeI });
    expect(rows[0]).toMatchObject({ pair: 'A2-광주-① (현)', pairKind: 'chord', source: '계산' });
    expect(rows[0].S).toBeCloseTo(-1.9, 6);
  });

  it('with a pier loaded the chord rule is not used', async () => {
    const { bridgePairs } = await import('../src/core/bridge-pairs');
    expect(bridgePairs([p1], [a1, abuts[3]]).some((p) => p.kind === 'chord')).toBe(false);
  });
});

describe('방위각 입력 · 계산 · 적용 (2026-11-06)', () => {
  it('P1: the 계산 방위각 is the A1 girder direction (≤ 0.5″ from the input); the back row has none', async () => {
    const { bridgePairs } = await import('../src/core/bridge-pairs');
    const { buildPier } = await import('../src/core/geometry');
    const m = buildPier(p1, { pairs: bridgePairs([p1], [a1]) });
    for (const s of m.soles.filter((x) => x.row === '전열')) expect(Math.abs(s.azimuthCalcDeg! - s.azimuthInputDeg) * 3600).toBeLessThanOrEqual(0.5);
    expect(m.soles.filter((x) => x.row === '후열').every((x) => x.azimuthCalcDeg === undefined)).toBe(true);
  });

  it('applying a value turns that block and keeps the workbook value as the input', async () => {
    const { bridgePairs } = await import('../src/core/bridge-pairs');
    const { buildPier } = await import('../src/core/geometry');
    const pairs = bridgePairs([p1], [a1]);
    const base = buildPier(p1, { pairs });
    const turned = buildPier({ ...p1, azimuthApplied: { 3: p1.bearings[2].azimuthDeg + 1 } }, { pairs });
    const skew = (m: typeof base, no: number) => m.blocks.find((b) => b.no === no)!.rowSkewDeg;
    expect(skew(turned, 3) - skew(base, 3)).toBeCloseTo(1, 6);
    expect(skew(turned, 2)).toBe(skew(base, 2));
    expect(turned.soles.find((s) => s.no === 3)!.azimuthInputDeg).toBe(p1.bearings[2].azimuthDeg);
  });

  it('현 짝 (교대만): the 계산 방위각 is the arc tangent — equal to the input on a circular arc', async () => {
    const { chordPairs } = await import('../src/core/bearing-pair');
    const a2: PairStructure = { name: 'A2', bearings: A1.bearings.map((b) => {
      const t = ((b.azimuthDeg - 4) * Math.PI) / 180;
      return { ...b, x: b.x + 350 * Math.sin(t), y: b.y + 350 * Math.cos(t), azimuthDeg: b.azimuthDeg - 8, z: b.z - 6.65 };
    }) };
    const pairs = chordPairs([A1], [a2]);
    expect(pairs).toHaveLength(5);
    pairs.forEach((p, i) => {
      expect(Math.abs(p.fromCalcDeg - A1.bearings[i].azimuthDeg) * 3600).toBeLessThan(0.5);
      expect(Math.abs(p.toCalcDeg - a2.bearings[i].azimuthDeg) * 3600).toBeLessThan(0.5);
    });
  });

  it('교대: an applied 계산 방위각 reaches the abutment model through toAbutInput', async () => {
    const { toAbutInput } = await import('../src/core/abut/parse');
    const input = toAbutInput({ ...a1, azimuthApplied: { 1: 10 } });
    expect(input.bearings.find((b) => b.no === 1)!.azimuthDeg).toBe(10);
    expect(input.bearings.find((b) => b.no === 2)!.azimuthDeg).toBe(a1.bearings[1].azimuthDeg);
  });
});