import { MASS_HAUL_DEFAULT_VISIBLE, normalizeVisibleBasis } from "@util/common_util_mass_haul";
import { readStateRaw, stateKey } from "../A00_Common/b_page_state";
import { MASS_HAUL_HEIGHT, MASS_HAUL_MIN_HEIGHT } from "@util/common_util_mass_haul_view";
import { LONG_HEIGHT } from "./B06_Section_UI_Section_Common";

export const PANEL_CHROME_PX = 102;
export const BASE_PANEL_HEIGHT = LONG_HEIGHT + MASS_HAUL_HEIGHT + PANEL_CHROME_PX;
export const MIN_LONG_HEIGHT = 110;
export const MIN_PANEL_HEIGHT = MIN_LONG_HEIGHT + MASS_HAUL_MIN_HEIGHT + PANEL_CHROME_PX;
export const MAX_PANEL_HEIGHT_RATIO = 0.8;
/* 패널 접힘·높이·유토곡선 범례는 화면 취향(①) — 키는 등록표(`b_page_state`)가 만든다.
   범례 키는 B05 와 **같은 값**이어야 한다(두 화면이 같은 그림의 두 창). */
export const PANEL_HEIGHT_KEY = stateKey("section-panel-height") ?? "";

/** 처음 열 때는 **곡선만** — 토량 분배는 범례에서 켠다(2026-09-06 사용자 지시).
 *  B05 `_UI_Profile_MassHaul` 과 같은 값이어야 한다(두 화면 공용 키). */
const DEFAULT_VISIBLE_KEYS = [...MASS_HAUL_DEFAULT_VISIBLE];

export function readVisibleSeries(): Set<string> {
  try {
    const raw = readStateRaw("masshaul-visible");
    if (!raw) return new Set(DEFAULT_VISIBLE_KEYS);
    const parsed: unknown = JSON.parse(raw);
    return Array.isArray(parsed)
      ? normalizeVisibleBasis(new Set(parsed.map(String)))
      : new Set(DEFAULT_VISIBLE_KEYS);
  } catch {
    return new Set(DEFAULT_VISIBLE_KEYS);
  }
}

export function chartHeights(availableHeightPx: number): { long: number; mass: number } {
  if (!Number.isFinite(availableHeightPx) || availableHeightPx <= 0) {
    return { long: LONG_HEIGHT, mass: MASS_HAUL_HEIGHT };
  }
  const available = Math.max(availableHeightPx, MIN_LONG_HEIGHT + MASS_HAUL_MIN_HEIGHT);
  if (available >= LONG_HEIGHT + MASS_HAUL_HEIGHT) {
    return { long: LONG_HEIGHT, mass: available - LONG_HEIGHT };
  }
  const ratio = available / (LONG_HEIGHT + MASS_HAUL_HEIGHT);
  const mass = Math.min(
    Math.max(MASS_HAUL_MIN_HEIGHT, Math.round(MASS_HAUL_HEIGHT * ratio)),
    available - MIN_LONG_HEIGHT,
  );
  return { long: available - mass, mass };
}

export function unwrapChart(node: HTMLElement): Element {
  return node.classList.contains("b06-section__chart-wrap") && node.firstElementChild
    ? node.firstElementChild
    : node;
}