/* 410 좌표 따라감 거울 — 진짜 TS(`common_util_route_follow`)를 Node 로 돌림.
 * 입력 argv[2] JSON = { lines: [L1, L2, ...], structures, pipes, followed } · 표준출력 JSON 한 벌.
 * 차례(구조물) = L1 에서 자리 붙임(placeOnLine) → L2 따라감 → L2 에서 자리 붙임 → L3 따라감 …
 * 관 = 좌표 없는 초안 + 앞 따라감(followed) → L1 자리 붙임 → L2 투영.
 */
const fs = require("fs");
const path = require("path");
const { makeLoader } = require("./helper_ts_stub_loader.cjs");

const ROOT = path.join(__dirname, "..", "..");

function loadTs(file, stubs = {}) {
  return makeLoader({
    root: ROOT,
    cache: false,
    requireFor: (full) => (request) => {
      if (stubs[request]) return stubs[request];
      throw new Error(`stub 없음: ${request} (${file})`);
    },
  }).loadTs(path.join(ROOT, file));
}

const catalog = require("./helper_322_catalog_module.cjs");
const station = loadTs("common_util/common_util_structure_station.ts", {
  "./common_util_structure_catalog": catalog,
});
const follow = loadTs("common_util/common_util_route_follow.ts", {
  "./common_util_structure_station": station,
});

const input = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
const lines = input.lines.map((line) => line.map(([x, y]) => ({ x, y })));
const steps = [];
let items = input.structures;
for (let i = 0; i + 1 < lines.length; i += 1) {
  const placed = follow.placeOnLine(items, lines[i], [], input.interval);
  items = follow
    .followStructures(placed, lines[i + 1], undefined, input.interval)
    .map((moved) => moved.item);
  steps.push({ placed, followed: items });
}
const pipesPlaced = follow.placeOnLine(input.pipes, lines[0], input.followed);
const out = {
  steps,
  pipesPlaced,
  pipesFollowed: follow.projectPipePoints(pipesPlaced, lines[1]),
};
process.stdout.write(JSON.stringify(out));