/**
 * Girder pairs over the whole bridge (A1, P1 … Pn, A2 — structureOrder) for the solplate slope S (결정 2026-11-06, Q-SH1).
 * Pure. Bearing coordinates and z cannot be edited on the screens, so the pairs change only when structures are loaded.
 */
import type { AbutRecord } from './abut/parse';
import { structureOrder } from './abut/order';
import { type BearingPair, girderPairs, type PairStructure } from './bearing-pair';
import type { PierInput } from './types';

export function bridgePairs(piers: Pick<PierInput, 'name' | 'bearings'>[], abuts: AbutRecord[]): BearingPair[] {
  const byPier = new Map(piers.map((p) => [p.name, p]));
  const byAbut = new Map(abuts.map((a) => [a.name, a]));
  const structures: PairStructure[] = structureOrder(abuts, piers.map((p) => p.name)).map((ref) => {
    if (ref.kind === 'pier') {
      const p = byPier.get(ref.name)!;
      return { name: p.name, bearings: p.bearings.filter((b) => Number.isFinite(b.azimuthDeg)).map((b) => ({ no: b.no, x: b.x, y: b.y, z: b.z, azimuthDeg: b.azimuthDeg })) };
    }
    const a = byAbut.get(ref.name)!;
    return { name: a.name, bearings: a.bearings.filter((b) => b.azimuthDeg !== undefined).map((b) => ({ no: b.no, x: b.pos.e, y: b.pos.n, z: b.z, azimuthDeg: b.azimuthDeg! })) };
  });
  return girderPairs(structures);
}