Aislo/B05_Profile/B05_Profile_UI_Drainage_Propose.ts

/* =============================================================================
 * B05_Profile_UI_Drainage_Propose.ts
 * 배수유역 칸 [자동 제안](510) — 서버가 후보를 셈(`post_pipe_proposals` · 세류선 교차 + 간격 보충 ·
 * 있는 관 · 지운 관 상태) · 화면은 목록만(점선 원 걷음 · 326-6) · 고른 것만 관 넣기 길(`addPipe`)로.
 *
 *   - 있는 관(라벨 짝 · 교차 5 m 안 관) = 목록에서 뺌(머리 글에 수만) · 지운 관 = 「지운 관」 표시 ·
 *     고르면 다시 넣음(서버가 지움 표지 걷음).
 *   - 아무것도 미리 안 고름 · [넣기] = 고른 것 · 세류선 교차 = 라벨 실음(노선 바뀐 [저장] 따라감 · 507-2).
 *   - 노선 · 관이 바뀌면(배수유역 낡음) 목록 닫음 — 옛 노선 후보가 새 노선에 안 들어가게.
 * ========================================================================== */

import { API_BASE_URL } from "@config/config_frontend";
import type { DetailPipeInput } from "../B04_PreProcess/B04_PreProcess_Api_Fetch";

export interface PipeProposal {
  chainage_m: number;
  kind: "stream" | "spacing";
  state: "new" | "held" | "dismissed";
  stream_label?: DetailPipeInput["stream_label"];
  stream_name?: string | null;
}

interface ProposalResponse {
  proposals: PipeProposal[];
  /** 간격 보충까지 셈(분석이 지금 노선) — 거짓 = 세류선 교차만. */
  spacing: boolean;
  message?: string;
}

/** 후보 한 줄 글. */
export function proposalText(item: PipeProposal): string {
  const at = `측점 ${Math.round(item.chainage_m)} m`;
  const what =
    item.kind === "stream"
      ? `세류선 교차${item.stream_name ? `(${item.stream_name})` : ""}`
      : "간격 보충(흐름이 모이는 자리)";
  return `${at} — ${what}${item.state === "dismissed" ? " · 지운 관" : ""}`;
}

export interface DrainagePropose {
  root: HTMLElement;
  /** 서버에 후보를 물어 목록을 엶. */
  open(): Promise<void>;
  close(): void;
}

export function createDrainagePropose(deps: {
  projectId: () => string | null;
  pipeRequest: () => DetailPipeInput[];
  /** 고른 후보를 관 넣기 길로(패널 `addPipe` 와 같은 길). */
  addPipes: (picks: PipeProposal[]) => void;
}): DrainagePropose {
  const root = document.createElement("div");
  root.className = "b05-drainage__suggest b05-drainage__proposals";
  root.hidden = true;
  const head = document.createElement("div");
  head.className = "b05-drainage__suggest-head";
  const title = document.createElement("span");
  const add = document.createElement("button");
  add.type = "button";
  add.className = "b05-drainage__analyze";
  add.textContent = "넣기";
  add.title = "고른 후보만 관으로 넣습니다 — 초안이라 [저장] 때 남습니다.";
  const shut = document.createElement("button");
  shut.type = "button";
  shut.className = "b05-drainage__analyze";
  shut.textContent = "닫기";
  head.append(title, add, shut);
  const list = document.createElement("ul");
  list.className = "b05-drainage__suggest-list b05-drainage__proposals-list";
  root.append(head, list);
  let shown: PipeProposal[] = [];
  const picked = new Set<number>();
  let sequence = 0;

  const close = (): void => {
    sequence += 1;
    root.hidden = true;
    shown = [];
    picked.clear();
    list.replaceChildren();
  };

  const render = (response: ProposalResponse): void => {
    shown = response.proposals.filter((item) => item.state !== "held");
    const held = response.proposals.length - shown.length;
    title.textContent =
      `자동 제안 ${shown.length}건` +
      (held ? ` · 있는 관 ${held} 뺌` : "") +
      (response.spacing ? "" : " · 배수유역 낡음 — 세류선 교차만");
    list.replaceChildren(
      ...shown.map((item, index) => {
        const row = document.createElement("li");
        const label = document.createElement("label");
        const box = document.createElement("input");
        box.type = "checkbox";
        box.addEventListener("change", () => {
          if (box.checked) picked.add(index);
          else picked.delete(index);
          add.disabled = picked.size === 0;
        });
        label.append(box, ` ${proposalText(item)}`);
        row.append(label);
        return row;
      }),
    );
    add.disabled = true;
    root.hidden = false;
  };

  add.addEventListener("click", () => {
    const picks = shown.filter((_, index) => picked.has(index));
    close();
    if (picks.length) deps.addPipes(picks);
  });
  shut.addEventListener("click", close);

  return {
    root,
    async open() {
      const projectId = deps.projectId();
      if (!projectId) return;
      const sent = ++sequence;
      title.textContent = "자동 제안 — 후보 셈 중";
      root.hidden = false;
      list.replaceChildren();
      add.disabled = true;
      try {
        const response = await fetch(
          `${API_BASE_URL}/projects/${projectId}/drainage/pipe-proposals`,
          {
            method: "POST",
            credentials: "include",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify({ points: deps.pipeRequest() }),
          },
        );
        const payload = (await response.json()) as ProposalResponse;
        if (sent !== sequence) return;
        if (!response.ok) throw new Error(payload.message ?? `HTTP ${response.status}`);
        render(payload);
      } catch (error) {
        if (sent !== sequence) return;
        title.textContent = `자동 제안 실패 — ${error instanceof Error ? error.message : error}`;
      }
    },
    close,
  };
}