/* =============================================================================
 * D03_PlanAnalysis_UI_Props.ts
 * D03 고름 속성 판(PLAN 585-2 · 598 · 요구 463 13·16 · 11) — 오토캐드 특성 창 꼴 · 판 하나가 고름 꼴마다 몸을 바꿈.
 *
 *   판 = 지도 위 떠 있는 판(공용 `createFloatPanel` · 머리 끌어 옮김 · 오른쪽 위) · 고름 있을 때만 · ✕ = 풂.
 *     노드 — 경위도 · 지반고 · 측점 · 앞 선 길이 · 기울기 · [노드 지움] [지점으로](그 자리에 지점 · 이미 있으면 숨김).
 *     선(토막) — 측점 · 길이 · 지반 기울기 · 든 연도 · [다시 긋기](하나 · 599) [선 지움](가운데 = 구역 둘).
 *     구역 — 길이 · 노드 수 · 연도(구역 모든 구간) · 구간 줄 · [구역 지움].
 *     전체 — 길이 · 구역 수 · 해마다 길이 · [전체 지움](되돌리기 됨).
 *     연도 구간(왼쪽 해 · 구간 줄) — 연도(모두 같으면 그 해 · 다르면 「여러 해」) · 구간 줄 · 마커 — 앞뒤 해 · [마커 지움].
 *   연도 고름 = 고른 구간 모두 그 해 = 되돌리기 한 걸음 · 보기만 계정 = 값만.
 *   좌측 「구역 · 연도」 목록 = `UI_Pieces.ts`(페이지가 붙임).
 * ========================================================================== */

import { createButton, showToast } from "@ui/ui_template_elements";
import { createFloatPanel } from "@ui/ui_template_float_panel";
import { createSelectField } from "@ui/ui_template_input";
import { createKv, type KvRow } from "@ui/ui_template_kv";
import { stationLabel } from "../common_util/common_util_station";
import { groundSlopePct, lineLength, type HeightAt } from "./logic/D03_PlanAnalysis_Draw";
import {
  lineNames,
  samePoint,
  setPiecesYear,
  type PlanNetwork,
  type PlanPiece,
  type Vertex,
} from "./logic/D03_PlanAnalysis_Plan";
import {
  placeNode,
  segmentPath,
  segmentPieces,
  segmentRange,
} from "./logic/D03_PlanAnalysis_Select";
import { nodeOff, nodeRecord } from "./logic/D03_PlanAnalysis_Span";
import { tmParams, tmToLonLat } from "./logic/D03_PlanAnalysis_Tm";
import {
  createDrawKindFields,
  DRAW_DEFAULT_LENGTH_M,
  DRAW_DEFAULT_SLOPE_PCT,
  type DrawKindValue,
} from "./D03_PlanAnalysis_UI_DrawPanel";
import type { PlanEdit, PlanSelection } from "./D03_PlanAnalysis_UI_Edit";
import { PLAN_STATION_INTERVAL_M } from "./D03_PlanAnalysis_UI_Map";
import { selectionLength } from "./D03_PlanAnalysis_UI_Select";

/** 조각 연도 고를 수 — 사업연도 시작부터. */
const YEAR_SPAN = 10;

const station = (m: number): string => stationLabel(m, PLAN_STATION_INTERVAL_M, 1);
const meters = (m: number): string => `${m.toFixed(1)} m`;
const percent = (pct: number | null): string => (pct === null ? "-" : `${pct.toFixed(1)} %`);

export interface PlanPropsParams {
  network: () => PlanNetwork;
  edit: PlanEdit;
  editable: () => boolean;
  yearStart: () => number;
  commit: (next: PlanNetwork) => void;
  heightAt: () => HeightAt;
  epsg: () => number;
  /** 지점(노드 판 [지점으로] — 이미 있으면 숨김). */
  points: () => Vertex[];
  addPoint: (point: Vertex) => void;
  /** 노드 판 방식 · 값 바꿈 — 노드 · 그 자리 지점 한 걸음. */
  commitPoints: (points: Vertex[], next: PlanNetwork) => void;
  /** [다시 긋기](599-3) — 구역 id · 앞 노드 · 뒤 노드. */
  respan: (line: string, from: number, to: number) => boolean;
}

export interface PlanProps {
  /** 지도 위 속성 판(지도 칸에 붙임). */
  panel: HTMLElement;
  /** 고름 · 꼴이 바뀜 — 판 다시. */
  render: () => void;
  /** 고를 해 — 사업연도 시작부터 열 해 + 조각에 있는 해. */
  yearOptions: () => Array<{ value: string; text: string }>;
}

export function createPlanProps(params: PlanPropsParams): PlanProps {
  const { edit } = params;
  const float = createFloatPanel({
    title: "고름",
    draggable: true,
    onClose: () => edit.select([]),
  });
  float.root.classList.add("d03-plan__props");
  float.root.dataset.role = "plan-props";
  float.root.hidden = true;

  function yearOptions(): Array<{ value: string; text: string }> {
    const start = params.yearStart();
    const years = new Set(Array.from({ length: YEAR_SPAN }, (_, i) => start + i));
    params.network().pieces.forEach((piece) => years.add(piece.year));
    return [...years].sort().map((year) => ({ value: String(year), text: `${year}년` }));
  }

  const button = (label: string, role: string, onClick: () => void): HTMLButtonElement => {
    const b = createButton({ label, variant: "ghost", size: 24, onClick });
    b.dataset.role = role;
    return b;
  };

  /** 연도 고름 — 구간 모두 그 해(되돌리기 한 걸음). */
  function yearField(pieces: PlanPiece[]): HTMLElement {
    const years = new Set(pieces.map((piece) => piece.year));
    const options = yearOptions();
    const ids = pieces.map((piece) => piece.id);
    const year = createSelectField({
      label: "연도",
      options: years.size > 1 ? [{ value: "", text: "여러 해" }, ...options] : options,
      value: years.size > 1 ? "" : String(pieces[0]?.year ?? ""),
      size: 24,
      ariaLabel: "고른 구간 연도",
      disabled: !params.editable(),
      onChange: (value) =>
        value && params.commit(setPiecesYear(params.network(), ids, Number(value))),
    });
    year.select.dataset.role = "props-year";
    return year.root;
  }

  /** 구간 줄 — 누름 = 그 구간만. */
  function pieceRows(network: PlanNetwork, pieces: PlanPiece[]): HTMLElement {
    const names = lineNames(network.lines);
    const rows = document.createElement("div");
    rows.className = "d03-plan__props-rows";
    for (const piece of pieces) {
      const index = network.lines.findIndex((line) => line.id === piece.line);
      const row = button(
        `${names[index]} ${station(piece.from_m)}~${station(piece.to_m)} · ` +
          `${meters(piece.to_m - piece.from_m)} · ${piece.year}년`,
        "props-piece",
        () => edit.select([piece.id]),
      );
      row.dataset.piece = piece.id;
      rows.append(row);
    }
    return rows;
  }

  /** 노드 방식 · 값(598-4 · 599-1 부품) — 방식 고름 = 바로 · 수 칸 = Enter · 칸 떠날 때 · 앞 노드 기준 다시 놓음. */
  function nodeKind(line: number, vertex: number): HTMLElement {
    const record = params.network().lines[line].nodes?.[vertex] ?? null;
    let value: DrawKindValue = {
      kind: record?.kind ?? "free",
      lengthM: record?.length_m ?? DRAW_DEFAULT_LENGTH_M,
      slopePct: record?.slope_pct ?? DRAW_DEFAULT_SLOPE_PCT,
    };
    const apply = (): void => {
      const network = params.network();
      const next = nodeRecord(value.kind, value.lengthM, value.slopePct);
      const out = placeNode(network, params.points(), line, vertex, next, params.heightAt());
      if (typeof out === "string") return void showToast(out, "info");
      if (JSON.stringify(out.network.lines) !== JSON.stringify(network.lines))
        params.commitPoints(out.points, out.network);
    };
    const fields = createDrawKindFields({
      value,
      onChange: (next) => {
        const kindChanged = next.kind !== value.kind;
        value = next;
        if (kindChanged) apply();
      },
    });
    fields.root.addEventListener("change", apply);
    fields.root.dataset.role = "props-node-kind";
    fields.setDisabled(!params.editable());
    return fields.root;
  }

  /** 고름 꼴마다 — 머리 글 · 몸 · 단추. */
  function body(
    picked: PlanSelection,
    network: PlanNetwork,
  ): { title: string; parts: HTMLElement[]; actions: HTMLButtonElement[] } {
    const names = lineNames(network.lines);
    const nameOf = (id: string | null): string =>
      names[network.lines.findIndex((line) => line.id === id)] ?? "";
    const z = params.heightAt();
    const pieces = network.pieces.filter((piece) => picked.pieces.includes(piece.id));
    const length = selectionLength(edit.paths());

    if (picked.kind === "node") {
      const { line, vertex } = picked.node!;
      const vertices = network.lines.find((l) => l.id === line)!.vertices;
      const point = vertices[vertex];
      const tm = tmParams(params.epsg());
      const lonLat = tm ? tmToLonLat(tm, point[0], point[1]) : null;
      const height = z(point[0], point[1]);
      const rows: KvRow[] = [
        {
          label: "경위도",
          value: lonLat ? `${lonLat[0].toFixed(6)}, ${lonLat[1].toFixed(6)}` : null,
        },
        { label: "지반고", value: Number.isFinite(height) ? `${height.toFixed(2)} m` : null },
        { label: "측점", value: station(lineLength(vertices.slice(0, vertex + 1))) },
      ];
      if (vertex > 0) {
        const [a, b] = [vertices[vertex - 1], vertices[vertex]];
        rows.push(
          { label: "앞 선 길이", value: meters(lineLength([a, b])) },
          { label: "앞 선 기울기", value: percent(groundSlopePct(a, b, z)) },
        );
      }
      const entry = network.lines.find((l) => l.id === line)!;
      if (nodeOff(entry, vertex, z)) rows.push({ label: "기록", value: "⚠ 지금 자리와 어긋남" });
      const parts: HTMLElement[] = [createKv(rows)];
      if (vertex > 0) parts.push(nodeKind(network.lines.indexOf(entry), vertex));
      const toPoint = button("지점으로", "props-to-point", () =>
        params.addPoint([point[0], point[1]]),
      );
      toPoint.hidden = params.points().some((p) => samePoint(p, point));
      return {
        title: `${nameOf(line)} · 노드 ${vertex + 1}`,
        parts,
        actions: [
          button("노드 지움", "props-drop-node", () => edit.dropNode(picked.node!)),
          toPoint,
        ],
      };
    }

    if (picked.kind === "segment") {
      const single = picked.segments.length === 1 ? picked.segments[0] : null;
      const years = [
        ...new Set(
          segmentPieces(network, picked.segments).map(
            (id) => network.pieces.find((p) => p.id === id)?.year,
          ),
        ),
      ].sort();
      const rows: KvRow[] = [{ label: "길이", value: meters(length) }];
      if (single) {
        const [from, to] = segmentRange(network, single)!;
        const [a, b] = segmentPath(network, single)!;
        rows.unshift({ label: "측점", value: `${station(from)} ~ ${station(to)}` });
        rows.push({ label: "지반 기울기", value: percent(groundSlopePct(a, b, z)) });
      }
      rows.push({ label: "연도", value: years.map((y) => `${y}년`).join(" · ") });
      const actions = [button("선 지움", "props-drop-segment", edit.dropSelected)];
      if (single)
        actions.unshift(
          button("다시 긋기", "props-respan", () =>
            params.respan(single.line, single.index, single.index + 1),
          ),
        );
      return {
        title: single
          ? `${nameOf(single.line)} · 선 ${single.index + 1}`
          : `선 ${picked.segments.length}개`,
        parts: [createKv(rows)],
        actions,
      };
    }

    if (picked.kind === "line") {
      const vertices = network.lines.find((l) => l.id === picked.line)?.vertices ?? [];
      return {
        title: nameOf(picked.line),
        parts: [
          createKv([
            { label: "길이", value: meters(length) },
            { label: "노드", value: `${vertices.length}개` },
          ]),
          yearField(pieces),
          pieceRows(network, pieces),
        ],
        actions: [button("구역 지움", "props-drop-line", () => edit.dropRegion(picked.line!))],
      };
    }

    if (picked.kind === "all") {
      const byYear = new Map<number, number>();
      for (const p of network.pieces)
        byYear.set(p.year, (byYear.get(p.year) ?? 0) + p.to_m - p.from_m);
      return {
        title: "전체",
        parts: [
          createKv([
            { label: "길이", value: meters(length) },
            { label: "구역", value: `${network.lines.length}개` },
            ...[...byYear]
              .sort(([a], [b]) => a - b)
              .map(([year, m]) => ({ label: `${year}년`, value: meters(m) })),
          ]),
        ],
        actions: [button("전체 지움", "props-drop-all", edit.dropAll)],
      };
    }

    // 연도 구간 · 마커
    const lineIds = new Set(pieces.map((piece) => piece.line));
    const total = pieces.reduce((sum, piece) => sum + piece.to_m - piece.from_m, 0);
    const parts: HTMLElement[] = [yearField(pieces), pieceRows(network, pieces)];
    const actions: HTMLButtonElement[] = [];
    const mark = network.pieces.find((p) => p.id === picked.mark);
    if (mark) {
      const before = network.pieces.find(
        (p) => p.line === mark.line && Math.abs(p.to_m - mark.from_m) < 1e-3,
      );
      parts.unshift(
        createKv([
          { label: "측점", value: station(mark.from_m) },
          { label: "앞 · 뒤 해", value: `${before?.year ?? "-"}년 · ${mark.year}년` },
        ]),
      );
      actions.push(button("마커 지움", "props-drop-mark", edit.dropMark));
    }
    return {
      title: `구간 ${pieces.length} · 구역 ${lineIds.size} · ${meters(total)}`,
      parts,
      actions,
    };
  }

  function renderPanel(): void {
    const picked = edit.selected();
    float.root.hidden = !picked;
    if (!picked) return float.body.replaceChildren();
    const { title, parts, actions } = body(picked, params.network());
    const head = float.root.querySelector(".ui-float-panel__title");
    if (head) head.textContent = title;
    float.root.dataset.kind = picked.kind;
    const row = document.createElement("div");
    row.className = "d03-plan__row";
    if (params.editable()) row.append(...actions);
    float.body.replaceChildren(...parts, row);
  }

  return {
    panel: float.root,
    render() {
      renderPanel();
    },
    yearOptions,
  };
}