import type { PierModel } from '../geometry';
import type { Issue, PierInput } from '../types';
import { barDepths, DEFAULT_BLOCK_REBAR, type BlockRebarSettings } from './bearing-block';

/**
 * 받침블럭 철근 입력 범위 (승인 2026-10-26, 제안 범위 확인).
 * RB01: a setting outside its range. RB02: the S2 bar sits at or below the block top-to-bottom height.
 * RB03: the bar legs do not reach into the coping (묻힘 < 0).
 */
export const BLOCK_REBAR_RANGES: Record<keyof BlockRebarSettings, [number, number]> = {
  coverTop: [50, 100],
  coverSide: [50, 100],
  firstGap: [0, 150],
  spacingS1: [100, 200],
  spacingS2: [100, 200],
  legLength: [500, 1000],
};

const LABELS: Record<keyof BlockRebarSettings, string> = {
  coverTop: '상면 피복',
  coverSide: '측면 피복',
  firstGap: '첫 철근 최소 여유',
  spacingS1: '간격 S1',
  spacingS2: '간격 S2',
  legLength: '다리 길이',
};

export function checkBlockRebar(input: PierInput, model: PierModel): Issue[] {
  const s: BlockRebarSettings = { ...DEFAULT_BLOCK_REBAR, ...input.blockRebar };
  const out: Issue[] = [];
  const add = (code: string, message: string) => out.push({ code, level: 'W', pier: input.name, message });

  for (const key of Object.keys(BLOCK_REBAR_RANGES) as (keyof BlockRebarSettings)[]) {
    const [lo, hi] = BLOCK_REBAR_RANGES[key];
    if (s[key] < lo || s[key] > hi) add('RB01', `${LABELS[key]} ${s[key]} mm가 범위 ${lo}–${hi} mm를 벗어납니다.`);
  }

  const depth = barDepths(s);
  for (const b of model.blocks) {
    const height = (b.top - b.bottom) * 1000;
    if (depth.S1 >= height) {
      add('RB02', `블럭 높이 ${height.toFixed(0)} mm보다 S1 깊이 ${depth.S1.toFixed(1)} mm가 깊습니다.`);
      break;
    }
  }
  for (const b of model.blocks) {
    const height = (b.top - b.bottom) * 1000;
    if (s.legLength - (height - depth.S1) < 0) {
      add('RB03', `다리 끝이 코핑 안에 묻히지 않습니다 (블럭 ${b.no}).`);
      break;
    }
  }
  return out;
}