/* =============================================================================
 * M02_SO_Def_Layout.ts
 * 구조물 정의 편집 화면(PLAN 48-2) — 고른 종류의 **배치 격자**(B05 · B06 좌측 구조물 칸 = 두 칸)
 * 옵션마다 줄 · 칸 · 너비 + 미리보기(기준 측점은 맨 위 한 줄 · 겹치면 빨강).
 * 자리를 안 정한 옵션은 차례대로 빈 칸을 채움 · 숫자를 고치면 그 옵션 자리만 정의 `배치` 에 남음.
 * ========================================================================== */

import { el } from "@ui/ui_template_elements";
import {
  baseShown,
  GRID_COLS,
  live,
  overlaps,
  placeAll,
  type Spot,
  type StructDef,
  type TypeDef,
} from "./M02_SO_Def_Model";
import { head, numberBox } from "./M02_SO_Def_Ui";
import { to } from "./M02_SO_Text";

export interface LayoutBlockOptions {
  def: StructDef;
  type: TypeDef;
  edit: boolean;
  changed: () => void;
}

const ROW_MAX = 60;

/** 미리보기 — 두 칸 격자 · 옵션마다 상자 */
function preview(def: StructDef, type: TypeDef, cells: Map<string, Spot>): HTMLElement {
  const bad = new Set(overlaps(cells));
  const base = baseShown(def, type.type_id);
  const offset = base ? 1 : 0;
  const boxes: HTMLElement[] = [];
  if (base)
    boxes.push(
      el("div", {
        className: "m02-sod__cell is-base",
        text: to("BaseStation"),
        attrs: { style: `grid-row: 1; grid-column: 1 / span ${GRID_COLS}` },
      }),
    );
  for (const o of live(type.options)) {
    const c = cells.get(o.key)!;
    boxes.push(
      el("div", {
        className: `m02-sod__cell${bad.has(o.key) ? " is-bad" : ""}`,
        text: o.label,
        attrs: {
          "data-sod-cell": o.key,
          title: o.label,
          style: `grid-row: ${c.줄 + offset}; grid-column: ${c.칸} / span ${c.너비}`,
        },
      }),
    );
  }
  return el("div", {
    className: "m02-sod__grid",
    attrs: {
      "data-sod-preview": "",
      style: `grid-template-columns: repeat(${GRID_COLS}, minmax(0, 1fr))`,
    },
    children: boxes,
  });
}

export function buildLayoutBlock(opt: LayoutBlockOptions): HTMLElement {
  const { def, type, edit, changed } = opt;
  const cells = placeAll(type.options, def.배치[type.type_id]);
  const rows = live(type.options).map((o) => {
    const c = cells.get(o.key)!;
    const fix = (patch: Partial<Spot>): void => {
      (def.배치[type.type_id] ??= {})[o.key] = { ...c, ...patch };
      changed();
    };
    return el("div", {
      className: "m02-sod__place",
      attrs: { "data-sod-place-row": o.key },
      children: [
        el("span", { className: "m02-sod__placename", text: o.label }),
        el("small", { text: to("GridRow") }),
        numberBox(c.줄, (n) => fix({ 줄: n }), {
          edit,
          min: 1,
          max: ROW_MAX,
          attr: "data-sod-row",
        }),
        el("small", { text: to("GridCol") }),
        numberBox(c.칸, (n) => fix({ 칸: n }), {
          edit,
          min: 1,
          max: GRID_COLS,
          attr: "data-sod-col",
        }),
        el("small", { text: to("GridWidth") }),
        numberBox(c.너비, (n) => fix({ 너비: n }), {
          edit,
          min: 1,
          max: GRID_COLS,
          attr: "data-sod-width",
        }),
      ],
    });
  });
  return el("div", {
    className: "m02-sod__block",
    children: [
      ...head(to("LayoutHead"), to("LayoutNote")),
      el("div", {
        className: "m02-sod__layout",
        children: [
          el("div", { className: "m02-sod__places", children: rows }),
          preview(def, type, cells),
        ],
      }),
    ],
  });
}