/* =============================================================================
 * B01_AccountDetail_UI_Page.ts
 * 로그인 후 01: 계정 상세 (기본 정보 수정 + 비밀번호 변경)
 *
 * 제약 준수 (frontend.md):
 *   - 모든 문구는 ui_template_locale.ts 참조 (하드코딩 금지, §3).
 *   - 색상/간격은 theme.css 변수 + 공통 컴포넌트만 사용 (§1, §2).
 *   - 이벤트 핸들러는 onB01_[기능]_[액션] 명명 (§4).
 *   - 백엔드 전송 전 1차 유효성 검사 (§4).
 * ========================================================================== */

import { ui_locales, currentLanguageIndex } from "@ui/ui_template_locale";
import { createButton, createInputField, createCard, showToast } from "@ui/ui_template_elements";
import { isBlank } from "@util/common_util_validate";
import "./B01_AccountDetail_UI_Style.css";

/** locale 헬퍼 */
function L(key: keyof typeof ui_locales): string {
  return ui_locales[key][currentLanguageIndex];
}

/** 비밀번호 최소 길이 (A07 회원가입과 동일 기준) */
const PASSWORD_MIN_LENGTH = 8;

/* -----------------------------------------------------------------------------
 * 페이지 진입점
 * -------------------------------------------------------------------------- */
export function renderB01AccountDetail(root: HTMLElement): void {
  const page = document.createElement("div");
  page.className = "b01-account";

  const header = document.createElement("div");
  header.className = "b01-account__header";
  const title = document.createElement("h1");
  title.className = "b01-account__title";
  title.textContent = L("B01_Account_Title");
  const subtitle = document.createElement("p");
  subtitle.className = "b01-account__subtitle";
  subtitle.textContent = L("B01_Account_Subtitle");
  header.append(title, subtitle);

  page.append(header, buildProfileCard(), buildSecurityCard());
  root.append(page);
}

/* -----------------------------------------------------------------------------
 * 기본 정보 카드 (회사/이름/이메일/연락처)
 * -------------------------------------------------------------------------- */
function buildProfileCard(): HTMLDivElement {
  // 회사명·이메일은 읽기 전용(가입 시 확정), 이름·연락처만 수정 가능
  const companyField = createInputField({
    label: L("B01_Account_Field_Company"),
    value: "",
  });
  companyField.input.readOnly = true;
  companyField.input.classList.add("b01-account__readonly");

  const emailField = createInputField({
    label: L("B01_Account_Field_Email"),
    type: "email",
    value: "",
  });
  emailField.input.readOnly = true;
  emailField.input.classList.add("b01-account__readonly");

  const nameField = createInputField({
    label: L("B01_Account_Field_Name"),
    required: true,
  });
  const phoneField = createInputField({
    label: L("B01_Account_Field_Phone"),
    placeholder: L("B01_Account_Field_Phone_Placeholder"),
    type: "text",
  });

  const saveBtn = createButton({
    label: L("B01_Account_Save_Profile"),
    variant: "filled",
    onClick: onB01_Profile_Save_Click,
  });
  saveBtn.classList.add("b01-account__submit");

  function onB01_Profile_Save_Click(): void {
    nameField.setError();
    if (isBlank(nameField.input.value)) {
      nameField.setError(L("B01_Account_Error_Required"));
      return;
    }
    // TODO: PATCH /api/b01/profile 연동 (로딩 오버레이 + 성공/실패 처리)
    showToast(L("B01_Account_Success_Profile"), "success");
  }

  const grid = document.createElement("div");
  grid.className = "b01-account__grid";
  grid.append(companyField.root, emailField.root, nameField.root, phoneField.root);

  return createCard({
    title: L("B01_Account_Section_Profile"),
    body: [grid, saveBtn],
    raised: true,
  });
}

/* -----------------------------------------------------------------------------
 * 보안 카드 (비밀번호 변경)
 * -------------------------------------------------------------------------- */
function buildSecurityCard(): HTMLDivElement {
  const currentPwField = createInputField({
    label: L("B01_Account_Field_CurrentPw"),
    type: "password",
    required: true,
  });
  const newPwField = createInputField({
    label: L("B01_Account_Field_NewPw"),
    type: "password",
    required: true,
  });
  const confirmPwField = createInputField({
    label: L("B01_Account_Field_ConfirmPw"),
    type: "password",
    required: true,
  });

  const saveBtn = createButton({
    label: L("B01_Account_Save_Password"),
    variant: "ghost",
    onClick: onB01_Password_Save_Click,
  });
  saveBtn.classList.add("b01-account__submit");

  function onB01_Password_Save_Click(): void {
    currentPwField.setError();
    newPwField.setError();
    confirmPwField.setError();

    const current = currentPwField.input.value;
    const next = newPwField.input.value;
    const confirm = confirmPwField.input.value;

    // 1차 유효성: 빈 값 검사
    let hasError = false;
    if (isBlank(current)) {
      currentPwField.setError(L("B01_Account_Error_Required"));
      hasError = true;
    }
    if (isBlank(next)) {
      newPwField.setError(L("B01_Account_Error_Required"));
      hasError = true;
    }
    if (isBlank(confirm)) {
      confirmPwField.setError(L("B01_Account_Error_Required"));
      hasError = true;
    }
    if (hasError) return;

    // 길이 검사
    if (next.length < PASSWORD_MIN_LENGTH) {
      newPwField.setError(L("B01_Account_Error_PwLength"));
      return;
    }
    // 일치 검사
    if (next !== confirm) {
      confirmPwField.setError(L("B01_Account_Error_PwMismatch"));
      return;
    }

    // TODO: PATCH /api/b01/password 연동 (로딩 오버레이 + 성공/실패 처리)
    currentPwField.input.value = "";
    newPwField.input.value = "";
    confirmPwField.input.value = "";
    showToast(L("B01_Account_Success_Password"), "success");
  }

  const grid = document.createElement("div");
  grid.className = "b01-account__grid";
  grid.append(currentPwField.root, newPwField.root, confirmPwField.root);

  return createCard({
    title: L("B01_Account_Section_Security"),
    body: [grid, saveBtn],
    raised: true,
  });
}