/* =============================================================================
 * 회사 조회 후 고르기(시스템 관리자 회사 알약 · 29-5)
 * 찾기 칸(이름 · 사업자번호 · 띄어쓰기 단어 모두 맞음) → 거른 목록(처음엔 최근 등록 순) →
 * 줄 누르면 고름. 목록은 LIMIT 줄까지만 그림 — 회사가 많아도 찾기로 좁힘.
 * ========================================================================== */

import { createButton, createInputField } from "@ui/ui_template_elements";
import type { CompanyInfo } from "./B01_Dashboard_Api_Fetch";
import { L } from "./B01_Dashboard_UI_Common";

const LIMIT = 50;

/** 이름 · 사업자번호(줄표 빼고도)에 모든 단어가 들어간 회사 — 순서는 받은 그대로 */
export function filterCompanies(companies: CompanyInfo[], text: string): CompanyInfo[] {
  const words = text.toLowerCase().split(/\s+/).filter(Boolean);
  return companies.filter((c) => {
    const no = c.business_registration_number ?? "";
    const hay = `${c.name} ${no} ${no.replace(/-/g, "")}`.toLowerCase();
    return words.every((w) => hay.includes(w));
  });
}

export function openCompanyPicker(
  companies: CompanyInfo[],
  currentId: number | null,
  onPick: (company: CompanyInfo) => void,
): void {
  const modal = document.createElement("div");
  modal.className = "b01-dashboard__modal";
  const panel = document.createElement("div");
  panel.className = "b01-dashboard__modal-panel";
  const heading = document.createElement("h3");
  heading.className = "b01-dashboard__modal-title";
  heading.textContent = L("B01_Dashboard_PickCompany");
  const query = createInputField({
    label: L("B01_Dashboard_Field_Search"),
    placeholder: L("B01_Dashboard_PickCompanyHint"),
  });
  const count = document.createElement("p");
  count.className = "b01-dashboard__company-count";
  const list = document.createElement("div");
  list.className = "b01-dashboard__company-list";

  const close = (): void => {
    modal.remove();
    document.removeEventListener("keydown", onKey, true);
  };
  const pick = (company: CompanyInfo): void => {
    close();
    onPick(company);
  };
  let shown: CompanyInfo[] = [];
  const render = (): void => {
    const found = filterCompanies(companies, query.input.value);
    shown = found.slice(0, LIMIT);
    count.textContent =
      found.length > LIMIT
        ? L("B01_Dashboard_PickCompanyMore")
            .replace("{count}", String(found.length))
            .replace("{limit}", String(LIMIT))
        : L("B01_Dashboard_PickCompanyCount").replace("{count}", String(found.length));
    list.replaceChildren(
      ...shown.map((company) => {
        const row = document.createElement("button");
        row.type = "button";
        row.className = "b01-dashboard__company-row";
        row.classList.toggle("is-current", company.id === currentId);
        const name = document.createElement("span");
        name.textContent = company.name;
        const no = document.createElement("small");
        no.textContent = company.business_registration_number ?? "";
        row.append(name, no);
        row.addEventListener("click", () => pick(company));
        return row;
      }),
    );
  };
  // Enter = 첫 줄 고름 · Esc = 닫기
  const onKey = (event: KeyboardEvent): void => {
    if (event.key === "Escape") close();
    else if (event.key === "Enter" && event.target === query.input && shown[0]) pick(shown[0]);
    else return;
    event.preventDefault();
    event.stopPropagation();
  };
  query.input.addEventListener("input", render);
  document.addEventListener("keydown", onKey, true);
  modal.addEventListener("click", (event) => {
    if (event.target === modal) close();
  });

  const actions = document.createElement("div");
  actions.className = "b01-dashboard__actions";
  actions.append(createButton({ label: L("Common_Btn_Cancel"), variant: "ghost", onClick: close }));
  panel.append(heading, query.root, count, list, actions);
  modal.append(panel);
  document.body.append(modal);
  render();
  query.input.focus();
}