/* 586 TM ↔ 경위도 · 화면 TM 틀 헬퍼 — `D03_PlanAnalysis_Tm.ts` 를 stdin 점 목록으로 돌려 JSON 으로 냄.
 *   입력 { points: [[epsg, x, y]], lonlat: [[epsg, lon, lat]], frames: [{ epsg, box, view, probes }] }
 */
const path = require("path");
const { makeLoader } = require("./helper_ts_stub_loader.cjs");

const ROOT = path.join(__dirname, "..", "..");
const { load } = makeLoader({ root: ROOT });
const tm = load("D03_PlanAnalysis", "logic", "D03_PlanAnalysis_Tm.ts");

const input = JSON.parse(require("fs").readFileSync(0, "utf-8"));
const out = {
  unknown: tm.tmParams(5174),
  toLonLat: input.points.map(([epsg, x, y]) => tm.tmToLonLat(tm.tmParams(epsg), x, y)),
  toTm: input.lonlat.map(([epsg, lon, lat]) => tm.lonLatToTm(tm.tmParams(epsg), lon, lat)),
  frames: input.frames.map(({ epsg, box, view, probes }) => {
    // 경위도 상자를 화면 직사각형에 펴는 바탕(캔버스 지금 꼴) · 가운데 = (cx, cy)
    const [lonMin, latMin, lonMax, latMax] = box;
    const [w, h, x0, y0, sx, sy] = view;
    const project = (lon, lat) => [
      x0 + ((lon - lonMin) / (lonMax - lonMin)) * sx,
      y0 + ((latMax - lat) / (latMax - latMin)) * sy,
    ];
    const unproject = (px, py) => [
      lonMin + ((px - x0) / sx) * (lonMax - lonMin),
      latMax - ((py - y0) / sy) * (latMax - latMin),
    ];
    const p = tm.tmParams(epsg);
    const frame = tm.localTmFrame(p, project, unproject, w / 2, h / 2);
    return {
      pxPerMeter: frame.pxPerMeter,
      probes: probes.map(([x, y]) => {
        const exact = project(...tm.tmToLonLat(p, x, y));
        const got = frame.toScreen(x, y);
        const back = frame.toMetric(...got);
        return { exact, got, back };
      }),
    };
  }),
};
process.stdout.write(JSON.stringify(out));