/* EG-BIM-specific Q&A page behavior. */
(function () {
  'use strict';

  const config = window.QA_CONFIG || { product: 'egbim', apiBaseUrl: '', ssoUrl: 'https://test.baroncs.co.kr/' };
  const STORAGE_KEY = 'baron.qa.posts.egbim';
  const COMMENTS_KEY = 'baron.qa.comments.egbim';
  const CATEGORY_CODES = { '오류문의': 'ERROR_QNA', '개선문의': 'IMPROVEMENT_QNA', '일반문의': 'GENERAL_QNA' };
  const STATUS_LABELS = {
    NEW: "신규",
    INIT: "신규",
    RECEIVED: "접수",
    ON_REVIEW: "접수",
    DETAILED_REVIEW: "진행중",
    IN_PROGRESS: "진행중",
    RESOLVED: "완료",
    COMPLETED: "완료",
    PENDING: "보류",
    ON_HOLD: "보류"
  };
  let authReady;
  let resolvedAuthUser = null;
  let inquiryUI = null;

  function qs(selector, root) { return (root || document).querySelector(selector); }
  function qsa(selector, root) { return Array.prototype.slice.call((root || document).querySelectorAll(selector)); }
  function escapeHtml(value) {
    return String(value == null ? '' : value).replace(/[&<>'"]/g, function (char) {
      return { '&': '&amp;', '<': '&lt;', '>': '&gt;', "'": '&#039;', '"': '&quot;' }[char];
    });
  }

  function normalizeFeedbackAttachment(attachment) {
    const item = typeof attachment === 'string' ? { url: attachment } : (attachment || {});
    const url = item.url || item.download_url || item.downloadUrl || item.file_url || item.fileUrl || item.signed_url || item.signedUrl || item.presigned_url || item.presignedUrl || '';
    const safeUrl = /^(https?:\/\/|\/)/i.test(String(url)) ? String(url) : '';
    let name = item.original_file_name || item.originalFileName || item.file_name || item.fileName || item.name || '';
    if (!name && safeUrl) {
      try {
        const objectName = decodeURIComponent(new URL(safeUrl, window.location.origin).pathname.split('/').pop() || '');
        const parts = objectName.split('_');
        name = parts.length > 2 ? parts.slice(2).join('_') : objectName;
      } catch (error) {}
    }
    name = name || '첨부파일';
    return { name: name, url: safeUrl };
  }

  function readJson(key, fallback) {
    try { return JSON.parse(localStorage.getItem(key) || 'null') || fallback; } catch (error) { return fallback; }
  }

  function getPosts() {
    return readJson(STORAGE_KEY, []).filter(function (post) { return post.category !== '공지사항'; });
  }

  function firstValue(source, keys) {
    if (!source || typeof source !== "object") return "";
    for (let index = 0; index < keys.length; index += 1) {
      const value = source[keys[index]];
      if (value !== undefined && value !== null && value !== "") return value;
    }
    return "";
  }

  function formatKoreanDateTime(value, includeTime) {
    const raw = String(value == null ? '' : value).trim();
    if (!raw) return '';
    if (/^\d{4}-\d{2}-\d{2}$/.test(raw)) return raw;
    let timestamp = raw.replace(' ', 'T');
    if (!/[zZ]$|[+-]\d{2}:?\d{2}$/.test(timestamp)) timestamp += 'Z';
    const date = new Date(timestamp);
    if (Number.isNaN(date.getTime())) return raw;
    const options = { timeZone: 'Asia/Seoul', year: 'numeric', month: '2-digit', day: '2-digit' };
    if (includeTime) Object.assign(options, { hour: '2-digit', minute: '2-digit', hourCycle: 'h23' });
    const parts = new Intl.DateTimeFormat('en-CA', options).formatToParts(date).reduce(function (result, part) {
      result[part.type] = part.value;
      return result;
    }, {});
    const day = parts.year + '-' + parts.month + '-' + parts.day;
    return includeTime ? day + ' ' + parts.hour + ':' + parts.minute : day;
  }

  function toBoolean(value) {
    if (value === true || value === 1) return true;
    return ["true", "1", "yes", "y"].indexOf(String(value || "").trim().toLowerCase()) > -1;
  }

  function normalizeCategory(value) {
    const raw = String(value || "").trim();
    return ({
      ERROR_QNA: "오류문의",
      IMPROVEMENT_QNA: "개선문의",
      GENERAL_QNA: "일반문의",
      오류: "오류문의",
      개선: "개선문의",
      일반: "일반문의"
    })[raw.toUpperCase()] || raw || "일반문의";
  }

  function normalizeRemotePost(item) {
    item = item || {};
    const requester = item.requester || item.author || item.user || {};
    const fields = [item.fields, item.metadata, item.meta, item.extra_fields, item.data].find(function (candidate) { return candidate && typeof candidate === "object" && !Array.isArray(candidate); }) || {};
    function value(keys) {
      return firstValue(item, keys) || firstValue(fields, keys) || firstValue(requester, keys);
    }
    const createdAt = value(["createdAt", "created_at", "date"]) || new Date().toISOString();
    const secret = value(["is_secret", "isSecret", "secret"]);
    const requesterEmail = value(["requester_email", "requesterEmail", "email"]);
    const completionRequested = value(["completion_requested", "completionRequested"]);
    const completionConfirmed = value(["completion_confirmed", "completionConfirmed"]);
    const completionRequestedAt = value(["completion_requested_at", "completionRequestedAt"]);
    const completionConfirmedAt = value(["completion_confirmed_at", "completionConfirmedAt"]);
    return {
      id: value(["id", "feedbackId", "feedback_id"]),
      feedbackId: value(["id", "feedbackId", "feedback_id"]),
      requesterId: value(["requester_id", "requesterId", "requester_uuid"]) || firstValue(requester, ["id", "uuid", "userId"]),
      requesterTenantId: value(["requester_tenant_id", "requesterTenantId", "tenant_id", "tenantId"]),
      requesterEmail: requesterEmail,
      category: normalizeCategory(value(["Category", "category"])),
      company: value(["requester_affiliation", "requester_company", "company", "organization", "tenant_name", "tenantName"]) || getCompanyNameFromEmail(requesterEmail),
      department: value(["requester_department", "department", "team"]) || "-",
      author: value(["requester_name", "author_name", "authorName", "name", "author"]) || "작성자",
      title: value(["title", "subject"]) || "제목 없음",
      content: value(["contents", "content", "body"]) || "",
      date: formatKoreanDateTime(createdAt, false),
      dateTime: formatKoreanDateTime(createdAt, true),
      createdAt: createdAt,
      status: normalizeStatus(value(["feedback_status", "feedbackStatus", "status_code", "status"])),
      secret: toBoolean(secret),
      completionRequested: toBoolean(completionRequested) || Boolean(completionRequestedAt),
      completionRequestedAt: completionRequestedAt,
      completionConfirmed: toBoolean(completionConfirmed) || Boolean(completionConfirmedAt),
      completionConfirmedAt: completionConfirmedAt,
      attachments: value(["attachments", "images"]) || [],
      raw: item
    };
  }

  async function loadRemotePosts(onPage) {
    const posts = [];
    const seen = new Set();
    let meta = {};
    for (let page = 1; ; page += 1) {
      const result = await requestJson('/api/feedbacks?limit=100&page=' + page, { method: 'GET' });
      const items = Array.isArray(result) ? result : (result.items || result.data && result.data.items || []);
      if (!Array.isArray(items)) throw new Error('문의 목록 응답을 확인할 수 없습니다.');
      const previousCount = posts.length;
      items.map(normalizeRemotePost).forEach(function (post) {
        if (post.id && !seen.has(post.id)) { seen.add(post.id); posts.push(post); }
      });
      if (page > 1 && items.length && posts.length === previousCount) throw new Error('문의 목록의 다음 페이지를 불러오지 못했습니다.');
      meta = result.meta || result.data && result.data.meta || {};
      const totalPages = Number(meta.totalPages ?? meta.total_pages);
      const total = Number(meta.total ?? meta.totalCount ?? meta.total_count);
      if (!items.length && (Number.isFinite(total) && posts.length < total || Number.isFinite(totalPages) && page < totalPages)) {
        throw new Error('문의 목록을 끝까지 불러오지 못했습니다.');
      }
      const hasMore = items.length > 0 && (Number.isFinite(totalPages) ? page < totalPages : Number.isFinite(total) ? posts.length < total : items.length === 100);
      if (onPage) onPage({ posts: posts.slice(), meta: meta, complete: !hasMore });
      if (!hasMore) return { posts: posts, meta: meta };
    }
  }

  const HANGUL_INITIALS = 'ㄱㄲㄴㄷㄸㄹㅁㅂㅃㅅㅆㅇㅈㅉㅊㅋㅌㅍㅎ';
  const searchIndex = new WeakMap();

  function normalizeSearchText(value) {
    return String(value || '').normalize('NFKC').toLowerCase()
      .replace(/[\u1100-\u1112]/g, function (char) { return HANGUL_INITIALS[char.charCodeAt(0) - 0x1100]; })
      .replace(/[\p{P}\p{S}]+/gu, ' ').replace(/\s+/g, ' ').trim();
  }

  function hangulInitials(value) {
    return Array.from(value).map(function (char) {
      const code = char.charCodeAt(0) - 0xac00;
      return code >= 0 && code <= 11171 ? HANGUL_INITIALS[Math.floor(code / 588)] : char;
    }).join('');
  }

  // Find a near substring, allowing insertions, deletions, substitutions and adjacent swaps.
  function fuzzySubstringDistance(query, text, limit) {
    const cap = limit + 1;
    const characters = Array.from({ length: query.length }, function (_, index) { return query.charCodeAt(index); });
    let previous = new Uint8Array(query.length + 1);
    let beforePrevious = new Uint8Array(query.length + 1);
    let current = new Uint8Array(query.length + 1);
    for (let j = 0; j <= query.length; j += 1) previous[j] = Math.min(j, cap);
    let best = limit + 1;
    for (let i = 0; i < text.length; i += 1) {
      const character = text.charCodeAt(i);
      const preceding = text.charCodeAt(i - 1);
      current[0] = 0;
      for (let j = 1; j <= query.length; j += 1) {
        let distance = previous[j - 1] + (character === characters[j - 1] ? 0 : 1);
        if (previous[j] + 1 < distance) distance = previous[j] + 1;
        if (current[j - 1] + 1 < distance) distance = current[j - 1] + 1;
        if (i > 0 && j > 1 && character === characters[j - 2] && preceding === characters[j - 1] && beforePrevious[j - 2] + 1 < distance) {
          distance = beforePrevious[j - 2] + 1;
        }
        current[j] = distance > cap ? cap : distance;
      }
      if (current[query.length] < best) best = current[query.length];
      // Exact substrings are checked by the caller; one edit is the best remaining match.
      if (best <= 1) return best;
      const reusable = beforePrevious;
      beforePrevious = previous;
      previous = current;
      current = reusable;
    }
    return best;
  }

  function searchPosts(posts, query) {
    const terms = normalizeSearchText(query).split(' ').filter(Boolean);
    if (!terms.length) return posts.slice();
    return posts.map(function (post, index) {
      let fields = searchIndex.get(post);
      if (!fields) {
        fields = [post.title, post.content, getPostCompanyLabel(post), post.department, post.author].map(function (value, field) {
          const text = normalizeSearchText(value).replace(/ /g, '');
          return { text: text, initials: hangulInitials(text), characters: new Set(text), weight: field === 0 ? 0 : field === 1 ? 3 : 2 };
        });
        searchIndex.set(post, fields);
      }
      let score = 0;
      for (const term of terms) {
        let best = Infinity;
        const initialsOnly = /^[ㄱㄲㄴㄷㄸㄹㅁㅂㅃㅅㅆㅇㅈㅉㅊㅋㅌㅍㅎ]{2,}$/.test(term);
        const limit = term.length >= 6 ? 2 : term.length >= 3 ? 1 : 0;
        for (const field of fields) {
          if (field.text.includes(term)) best = Math.min(best, field.weight);
          else if (initialsOnly && field.initials.includes(term)) best = Math.min(best, 1 + field.weight);
          else if (!initialsOnly && limit && term.length <= 32 && field.text) {
            if (Array.from(term).filter(function (char) { return !field.characters.has(char); }).length > limit) continue;
            const distance = fuzzySubstringDistance(term, field.text, limit);
            if (distance <= limit) best = Math.min(best, 10 * distance + field.weight);
          }
          if (best === 0) break;
        }
        if (!Number.isFinite(best)) return { post: post, index: index, score: Infinity };
        score += best;
      }
      return { post: post, index: index, score: score };
    }).filter(function (match) { return Number.isFinite(match.score); })
      .sort(function (a, b) { return a.score - b.score || a.index - b.index; })
      .map(function (match) { return match.post; });
  }

  function savePost(post) {
    const posts = readJson(STORAGE_KEY, []);
    posts.unshift(post);
    localStorage.setItem(STORAGE_KEY, JSON.stringify(posts));
  }

  function updateStoredPost(post) {
    const posts = readJson(STORAGE_KEY, []);
    const index = posts.findIndex(function (item) { return item.id === post.id; });
    if (index < 0) return;
    posts[index] = Object.assign({}, posts[index], post);
    localStorage.setItem(STORAGE_KEY, JSON.stringify(posts));
  }

  function removeStoredPost(id) {
    const posts = readJson(STORAGE_KEY, []).filter(function (post) { return post.id !== id; });
    localStorage.setItem(STORAGE_KEY, JSON.stringify(posts));
  }

  function matchesAuthorId(authorId, user) {
    if (!user) return false;
    const normalizeId = function (id) { return String(id || '').trim().toLowerCase(); };
    const ownerId = normalizeId(authorId);
    const userId = normalizeId(user.requesterId || user.ssoSubject || user.userUuid);
    return Boolean(ownerId && userId && ownerId === userId);
  }

  function isPostOwner(post, user) {
    return Boolean(post) && matchesAuthorId(post.requesterId || post.requesterUuid, user);
  }

  function normalizeStatus(value) {
    if (value && typeof value === "object") value = value.code || value.key || value.value || value.name || "";
    const raw = String(value || "").trim();
    if (!raw) return "";
    const upper = raw.toUpperCase();
    return STATUS_LABELS[upper] || ({
      NEW: "신규", INIT: "신규", 신규: "신규",
      RECEIVED: "접수", 접수: "접수", 문의접수: "접수", ON_REVIEW: "접수", REVIEW: "접수", 문의검토: "접수",
      DETAILED_REVIEW: "진행중", DEEP: "진행중", IN_PROGRESS: "진행중", PATCH: "진행중", 처리중: "진행중", 진행중: "진행중", 정밀검토: "진행중",
      DONE: "완료", COMPLETED: "완료", RESOLVED: "완료", 답변완료: "완료", 완료: "완료",
      HOLD: "보류", ON_HOLD: "보류", PENDING: "보류", 보류: "보류"
    }[upper] || raw);
  }

  function extractFeedbackStatus(payload) {
    const root = payload && payload.feedback ? payload.feedback : payload;
    const candidates = [root, root && root.data, root && root.feedback, root && root.fields];
    for (let index = 0; index < candidates.length; index += 1) {
      const candidate = candidates[index];
      if (!candidate || typeof candidate !== 'object') continue;
      const value = candidate.feedback_status || candidate.feedbackStatus || candidate.status_code || candidate.status;
      if (value != null && value !== '') return normalizeStatus(value);
    }
    const fields = root && (Array.isArray(root.fields) ? root.fields : (root.data && Array.isArray(root.data.fields) ? root.data.fields : []));
    const statusField = fields.find(function (field) { return field && (field.key === 'feedback_status' || field.fieldKey === 'feedback_status' || field.name === 'feedback_status'); });
    return statusField ? normalizeStatus(statusField.value || statusField.val || statusField.data) : '';
  }

  async function refreshRemoteStatus(post) {
    if (!post || !post.id || post.category === '공지사항') return false;
    try {
      const result = await requestJson('/api/feedbacks/' + encodeURIComponent(post.id), { method: 'GET' });
      const status = extractFeedbackStatus(result);
      if (!status || status === post.status) return false;
      post.status = status;
      updateStoredPost(post);
      return true;
    } catch (error) {
      console.warn('[QA] feedback status sync failed:', post.id, error.message);
      return false;
    }
  }

  async function refreshRemoteStatuses(posts) {
    const changed = await Promise.all((posts || []).map(refreshRemoteStatus));
    return changed.some(Boolean);
  }

  function getComments() { return readJson(COMMENTS_KEY, {}); }

  function parseJson(value, fallback) {
    if (!value) return fallback;
    try { return typeof value === 'string' ? JSON.parse(value) : value; } catch (error) { return fallback; }
  }

  function decodeCookieJson(value) {
    if (!value) return null;
    try {
      const binary = window.atob(value);
      const bytes = Array.prototype.map.call(binary, function (char) { return '%' + ('00' + char.charCodeAt(0).toString(16)).slice(-2); }).join('');
      return JSON.parse(decodeURIComponent(bytes));
    } catch (error) {
      try { return JSON.parse(window.atob(value)); } catch (fallbackError) { return null; }
    }
  }

  function readCookie(name) {
    const item = document.cookie.split('; ').find(function (part) { return part.indexOf(name + '=') === 0; });
    return item ? item.slice(name.length + 1) : '';
  }

  function decodeJwtPayload(token) {
    if (!token || token.split('.').length < 2) return {};
    try {
      const encoded = token.split('.')[1].replace(/-/g, '+').replace(/_/g, '/');
      return JSON.parse(decodeURIComponent(escape(window.atob(encoded + '='.repeat((4 - encoded.length % 4) % 4)))));
    } catch (error) { return {}; }
  }

  function getTenantName(tenant) {
    if (!tenant || typeof tenant !== 'object') return '';
    return tenant.name || tenant.tenantName || tenant.displayName || tenant.label || tenant.nameKo || tenant.koreanName || '';
  }

  function getCompanyNameFromEmail(email) {
    const domain = String(email || '').split('@').pop().trim().toLowerCase();
    return ({
      'samaneng.com': '삼안',
      'hanmaceng.co.kr': '한맥기술',
      'brsw.kr': '바론그룹',
      'baroncs.co.kr': '바론컨설턴트',
      'jangheon.co.kr': '장헌산업',
      'jangheon.com': '(주)장헌',
      'hallasanup.com': '한라산업개발'
    })[domain] || '';
  }

  function getPostCompanyLabel(post, user) {
    post = post || {};
    const raw = post.raw || {};
    const savedCompany = raw.requester_affiliation || (raw.extra_fields || {}).requester_affiliation;
    if (savedCompany) return savedCompany;
    if (post.company && post.company !== "외부 사용자") return post.company;
    const emailCompany = getCompanyNameFromEmail(post.requesterEmail || raw.requester_email || raw.requesterEmail);
    if (emailCompany) return emailCompany;
    return post.company || "외부 사용자";
  }

  function collectSsoClaims() {
    const storedClaims = parseJson(
      sessionStorage.getItem('ssoClaims') || sessionStorage.getItem('baronClaims') || sessionStorage.getItem('claims'),
      decodeCookieJson(readCookie('baron_claims')) || {}
    );
    return Object.assign({}, decodeJwtPayload(sessionStorage.getItem('sessionJwt') || ''), storedClaims);
  }

  function normalizeAuthUser(raw, claims) {
    raw = raw || {};
    claims = claims || {};
    const custom = raw.customAttributes || raw.custom_attributes || {};
    const claimProfile = claims.profile || {};
    const tenants = raw.tenants || raw.tenantIds || custom.tenants || claims.tenants || claims.tenantIds || [];
    const tenantList = Array.isArray(tenants) ? tenants : Object.keys(tenants).map(function (key) {
      return typeof tenants[key] === 'object' ? Object.assign({ id: key }, tenants[key]) : { id: key, name: tenants[key] };
    });
    const tenantId = raw.tenantId || raw.tenant_id || custom.tenantId || custom.tenant_id || claims.tenantId || claims.tenant_id || (tenantList[0] && (tenantList[0].id || tenantList[0].tenantId)) || '';
    const tenantIds = tenantList.map(function (tenant) { return typeof tenant === 'string' ? tenant : (tenant.id || tenant.tenantId || tenant.key || ''); }).filter(Boolean);
    if (tenantId && tenantIds.indexOf(tenantId) === -1) tenantIds.unshift(tenantId);
    const primaryTenant = tenantList.find(function (tenant) { return typeof tenant !== 'string' && (tenant.id || tenant.tenantId) === tenantId; }) || tenantList[0] || {};
    const tenantName = raw.tenantName || raw.tenant_name || custom.tenantName || custom.tenant_name || claims.tenantName || claims.tenant_name || getTenantName(primaryTenant);
    const ssoSubject = raw.ssoSubject || raw.oauthSubject || raw.subject || claims.sub || claims.subject || raw.requesterId || raw.userUuid || raw.userId || sessionStorage.getItem('descopeUserId') || '';
    const userUuid = raw.userUuid || raw.userId || claims.userId || claims.user_id || ssoSubject || sessionStorage.getItem('descopeUserId') || '';
    const loginId = raw.loginId || (raw.loginIds || [])[0] || raw.email || claims.email || claimProfile.email || sessionStorage.getItem('loginId') || readCookie('descope_login_id') || '';
    const email = raw.email || claims.email || claimProfile.email || sessionStorage.getItem('loginId') || '';
    const company = raw.company || custom.company || claims.company || sessionStorage.getItem('company') || getCompanyNameFromEmail(email) || '';
    return {
      userUuid: userUuid,
      ssoSubject: ssoSubject,
      requesterId: raw.requesterId || ssoSubject,
      tenantId: tenantId,
      requesterTenantId: tenantId,
      tenantIds: tenantIds,
      scope: raw.scope || claims.scope || sessionStorage.getItem('ssoScope') || '',
      roles: raw.roles || raw.roleNames || claims.roles || claims.roleNames || [],
      loginId: loginId,
      email: email,
      name: raw.name || claims.name || claimProfile.name || sessionStorage.getItem('userName') || readCookie('descope_user_name') || '',
      phone: raw.phone || raw.phoneNumber || claims.phone || claims.phone_number || sessionStorage.getItem('phone') || '',
      tenantName: tenantName,
      company: company,
      familyCompany: custom.familyCompany || custom.family_company || raw.familyCompany || sessionStorage.getItem('familyCompany') || '',
      department: raw.department || custom.team || custom.department || claims.department || sessionStorage.getItem('team') || '',
      rawClaims: claims
    };
  }

  function getAuthUser() {
    if (resolvedAuthUser) return resolvedAuthUser;
    const sessionUser = normalizeAuthUser({
      loginId: sessionStorage.getItem('loginId') || '',
      userId: sessionStorage.getItem('descopeUserId') || '',
      name: sessionStorage.getItem('userName') || '',
      company: sessionStorage.getItem('company') || '',
      familyCompany: sessionStorage.getItem('familyCompany') || '',
      department: sessionStorage.getItem('team') || '',
      tenantId: sessionStorage.getItem('tenantId') || sessionStorage.getItem('tenant_id') || '',
      tenantIds: parseJson(sessionStorage.getItem('tenantIds'), [])
    }, collectSsoClaims());
    if (sessionUser.loginId || sessionUser.ssoSubject) return sessionUser;
    const baronUser = decodeCookieJson(readCookie('baron_user'));
    const descopeUser = baronUser || {
      loginId: readCookie('descope_login_id'), userId: readCookie('descope_user_id'), name: readCookie('descope_user_name'),
      email: readCookie('descope_user_email'), phone: readCookie('descope_user_phone'),
      customAttributes: decodeCookieJson(readCookie('descope_custom_attributes')) || {}
    };
    return descopeUser && (descopeUser.loginId || descopeUser.userId || descopeUser.email) ? normalizeAuthUser(descopeUser, collectSsoClaims()) : null;
  }

  async function loadAuthUser() {
    const localUser = getAuthUser();
    if (!config.ssoSessionEndpoint) {
      resolvedAuthUser = localUser;
      return localUser;
    }
    try {
      const response = await fetch(config.ssoSessionEndpoint, { credentials: 'include', headers: { Accept: 'application/json' } });
      if (!response.ok) throw new Error('SSO 세션 확인에 실패했습니다.');
      const body = await response.json();
      const rawUser = body.user || body;
      if (body.authenticated === false || !rawUser || !(rawUser.requesterId || rawUser.ssoSubject || rawUser.userUuid || rawUser.userId || rawUser.subject)) {
        resolvedAuthUser = null;
        return null;
      }
      const remoteUser = normalizeAuthUser(rawUser, body.claims || body.scope || {});
      if (remoteUser.loginId || remoteUser.ssoSubject) {
        resolvedAuthUser = remoteUser;
        return remoteUser;
      }
    } catch (error) {
      console.warn('[QA] SSO session bridge unavailable:', error.message);
    }
    resolvedAuthUser = null;
    return null;
  }

  function renderAuth(user) {
    user = user || getAuthUser();
    qsa('.login-link').forEach(function (element) { element.href = config.ssoUrl || element.href; });
    qsa('[data-auth-name]').forEach(function (element) { element.textContent = user ? (user.name || user.loginId) : '로그인'; });
    qsa('[data-auth-state]').forEach(function (element) {
      element.textContent = user ? (user.name || user.loginId) + '님으로 로그인됨' : '글 작성은 로그인 후 이용할 수 있습니다.';
    });
    qsa('[data-auth-required]').forEach(function (element) { element.hidden = Boolean(user); });
    qsa('[data-auth-user]').forEach(function (element) { element.hidden = !user; });
  }

  function bindGlobal() {
    renderAuth(getAuthUser());
    authReady = loadAuthUser().catch(function (error) {
      console.error('[QA] SSO session load failed:', error);
      return getAuthUser();
    }).then(function (user) { renderAuth(user); return user; });
    const accountMenu = qs('#accountMenu');
    if (accountMenu) {
      document.addEventListener('click', function (event) {
        if (!accountMenu.contains(event.target)) accountMenu.open = false;
      });
      document.addEventListener('keydown', function (event) {
        if (event.key === 'Escape' && accountMenu.open) {
          accountMenu.open = false;
          qs('#accountButton').focus();
        }
      });
    }
    const menuButton = qs('.menu-button');
    const nav = qs('.global-nav');
    if (menuButton && nav) {
      menuButton.addEventListener('click', function () {
        nav.classList.toggle('mobile-open');
      });
    }
  }

  function normalizePageHeading() {
    qsa('.egbim-page .section-heading h2').forEach(function (heading) { heading.textContent = '문의하기(Q&A)'; });
    qsa('.egbim-page .section-heading p').forEach(function (description) { description.remove(); });
  }

  function showToast(message) {
    const toast = qs('#toast');
    if (!toast) return;
    toast.textContent = message;
    toast.classList.add('show');
    window.clearTimeout(showToast.timer);
    showToast.timer = window.setTimeout(function () { toast.classList.remove('show'); }, 2600);
  }

  async function requestJson(path, options) {
    const requestPath = String(path).split("?")[0];
    const sameOriginProxy = !config.apiBaseUrl && (requestPath === config.createFeedbackPath || requestPath === "/api/feedbacks" || /^\/api\/feedbacks\/[^\/]+(?:\/comments(?:\/[^\/]+)?|\/completion-confirmation)?$/.test(requestPath));
    if (!config.apiBaseUrl && !sameOriginProxy) return { local: true };
    const target = config.apiBaseUrl ? config.apiBaseUrl.replace(/\/$/, '') + path : path;
    const response = await fetch(target, Object.assign({ credentials: 'include' }, options));
    if (!response.ok) {
      const errorBody = await response.json().catch(function () { return {}; });
      throw new Error(errorBody.message || errorBody.error || 'API 요청에 실패했습니다. (' + response.status + ')');
    }
    return response.json().catch(function () { return {}; });
  }

  async function postToApi(path, payload) {
    const isFormData = typeof FormData !== 'undefined' && payload instanceof FormData;
    return requestJson(path, isFormData ? { method: 'POST', body: payload } : { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(payload) });
  }

  function makeUuid() {
    const bytes = new Uint8Array(16);
    if (window.crypto && typeof window.crypto.getRandomValues === 'function') window.crypto.getRandomValues(bytes);
    else for (let index = 0; index < bytes.length; index += 1) bytes[index] = Math.random() * 256 | 0;
    const timestamp = Date.now();
    bytes[0] = Math.floor(timestamp / 0x10000000000) & 0xff;
    bytes[1] = Math.floor(timestamp / 0x100000000) & 0xff;
    bytes[2] = Math.floor(timestamp / 0x1000000) & 0xff;
    bytes[3] = Math.floor(timestamp / 0x10000) & 0xff;
    bytes[4] = Math.floor(timestamp / 0x100) & 0xff;
    bytes[5] = timestamp & 0xff;
    bytes[6] = (bytes[6] & 0x0f) | 0x70;
    bytes[8] = (bytes[8] & 0x3f) | 0x80;
    const hex = Array.prototype.map.call(bytes, function (byte) { return ('0' + byte.toString(16)).slice(-2); }).join('');
    return hex.slice(0, 8) + '-' + hex.slice(8, 12) + '-' + hex.slice(12, 16) + '-' + hex.slice(16, 20) + '-' + hex.slice(20);
  }

  async function sha256(file) {
    if (!window.crypto || !window.crypto.subtle) return '';
    const digest = await window.crypto.subtle.digest('SHA-256', await file.arrayBuffer());
    return Array.prototype.map.call(new Uint8Array(digest), function (byte) { return ('00' + byte.toString(16)).slice(-2); }).join('');
  }

  async function buildFeedbackSubmission(post, feedbackId, files) {
    files = Array.prototype.slice.call(files || []);
    const descriptors = await Promise.all(files.map(async function (file) {
      return { id: makeUuid(), originalFileName: file.name, mimeType: file.type || 'application/octet-stream', fileSize: file.size, checksumSha256: await sha256(file), purpose: 'FEEDBACK_ATTACHMENT' };
    }));
    const payload = { feedbackId: feedbackId, title: post.title, contents: post.content, Category: CATEGORY_CODES[post.category], is_secret: post.secret ? 'true' : 'false' };
    if (!files.length) return { body: payload, attachments: descriptors };
    const formData = new FormData();
    Object.keys(payload).forEach(function (key) { formData.append(key, payload[key]); });
    files.forEach(function (file) { formData.append('images', file, file.name); });
    return { body: formData, attachments: descriptors };
  }

  function initList() {
    const tableBody = qs("#qaRows");
    if (!tableBody) return;
    const searchForm = qs("#searchForm");
    const empty = qs("#tableEmpty");
    const resultCount = qs("#resultCount");
    const pagination = qs("#pagination");
    let page = 1;
    let posts = getPosts();
    let remoteLoaded = false;
    let loadFailed = false;
    let receivedRemotePage = false;
    const searchStatus = qs('#searchStatus');
    const changes = new Map();
    const deleted = new Set();

    function mergeChanges(remotePosts) {
      const result = remotePosts.filter(function (post) { return !deleted.has(post.id); }).map(function (post) { return changes.get(post.id) || post; });
      for (const post of changes.values()) if (!deleted.has(post.id) && !result.some(function (item) { return item.id === post.id; })) result.unshift(post);
      return result;
    }

    function getPostCompany(post, user) { return getPostCompanyLabel(post, user); }

    function render() {
      const query = (qs("#query").value || "").trim().toLowerCase();
      const selectedCategory = qs("input[name=category]:checked");
      const categoryFilter = selectedCategory ? selectedCategory.value : "전체";
      const onlyMine = qs("#onlyMine").checked;
      const user = getAuthUser();
      const filtered = searchPosts(posts.filter(function (post) {
        const matchesCategory = categoryFilter === "전체" || categoryFilter === post.category;
        const matchesMine = !onlyMine || isPostOwner(post, user);
        return matchesCategory && matchesMine;
      }), query);
      const pageSize = config.pageSize || 10;
      const totalPages = Math.max(1, Math.ceil(filtered.length / pageSize));
      page = Math.min(page, totalPages);
      const rows = filtered.slice((page - 1) * pageSize, page * pageSize);
      if (resultCount) resultCount.textContent = "총 " + filtered.length + "건";
      if (searchStatus) {
        searchStatus.hidden = remoteLoaded && !loadFailed && !query;
        searchStatus.textContent = loadFailed ? '목록을 모두 불러오지 못했습니다. 현재 불러온 글에서 검색합니다. 새로고침해 주세요.' : !remoteLoaded ? '문의 목록을 불러오는 중입니다. 검색 결과가 추가될 수 있습니다.' : '검색 결과 ' + filtered.length + '건';
      }
      if (empty) {
        empty.textContent = remoteLoaded || posts.length ? "검색 조건에 맞는 문의가 없습니다." : "문의 목록을 불러오는 중입니다.";
        empty.style.display = rows.length ? "none" : "block";
      }
      tableBody.innerHTML = rows.map(function (post, index) {
        const isNotice = post.category === "공지사항";
        const number = isNotice ? "공지" : filtered.length - ((page - 1) * pageSize + index);
        const status = normalizeStatus(post.status);
        const statusClass = status === '완료' ? 'done' : status === '신규' ? 'new' : status === '보류' ? 'hold' : status === '진행중' ? 'patch' : 'review';
        const company = getPostCompany(post, user);
        return "<tr class=\"" + (isNotice ? "notice-row" : "") + "\" data-id=\"" + escapeHtml(post.id) + "\">" +
          "<td>" + number + "</td><td class=\"category-cell\">" + escapeHtml(post.category.replace("문의", "")) + "</td>" +
          '<td title="' + escapeHtml(company) + '">' + escapeHtml(company) + '</td><td title="' + escapeHtml(post.department) + '">' + escapeHtml(post.department) + '</td><td>' + escapeHtml(post.author) + '</td>' +
          '<td class="inquiry-subject"><a class="subject-link" title="' + escapeHtml(post.title) + '" href="detail.html?id=' + encodeURIComponent(post.id) + '">' + (post.secret ? '<span class="lock" aria-label="비밀글">🔒</span>' : '') + '<span>' + escapeHtml(post.title) + '</span></a></td>' +
          '<td title="' + escapeHtml(post.dateTime || post.date) + '">' + escapeHtml(post.dateTime || post.date) + '</td><td>' + (status ? '<span class="inquiry-status inquiry-status--' + statusClass + '">' + escapeHtml(status) + '</span>' : '-') + '</td></tr>';
      }).join("");
      qsa("#qaRows tr").forEach(function (row) { row.addEventListener("click", function (event) {
        if (event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) return;
        if (inquiryUI) { event.preventDefault(); inquiryUI.open('detail', row.dataset.id, row.querySelector('a')); }
        else window.location.href = 'detail.html?id=' + encodeURIComponent(row.dataset.id);
      }); });
      const visiblePages = Array.from(new Set([1, totalPages, page - 2, page - 1, page, page + 1, page + 2])).filter(function (value) { return value >= 1 && value <= totalPages; }).sort(function (a, b) { return a - b; });
      pagination.innerHTML = '<button type="button" data-page="' + Math.max(1, page - 1) + '" aria-label="이전 페이지"' + (page === 1 ? ' disabled' : '') + '>‹</button>' + visiblePages.map(function (value, index) {
        const gap = index > 0 && value - visiblePages[index - 1] > 1 ? '<span aria-hidden="true">…</span>' : '';
        return gap + '<button type="button" class="' + (value === page ? 'active' : '') + '" data-page="' + value + '"' + (value === page ? ' aria-current="page"' : '') + '>' + value + '</button>';
      }).join('') + '<button type="button" data-page="' + Math.min(totalPages, page + 1) + '" aria-label="다음 페이지"' + (page === totalPages ? ' disabled' : '') + '>›</button>';
      qsa("#pagination button").forEach(function (button) { button.addEventListener("click", function () { page = Number(button.dataset.page); render(); window.scrollTo({ top: 360, behavior: "smooth" }); }); });
    }

    searchForm.addEventListener("submit", function (event) { event.preventDefault(); page = 1; render(); });
    qsa("input[name=category], #onlyMine").forEach(function (input) { input.addEventListener("change", function () { page = 1; render(); }); });
    render();
    if (authReady) authReady.then(render);
    loadRemotePosts(function (result) { receivedRemotePage = true; posts = mergeChanges(result.posts); render(); }).then(function (result) {
      posts = mergeChanges(result.posts);
      remoteLoaded = true;
      render();
    }).catch(function (error) {
      console.warn("[QA] feedback list load failed:", error.message);
      remoteLoaded = true;
      loadFailed = true;
      render();
      if (!receivedRemotePage) refreshRemoteStatuses(posts).then(function (changed) { if (changed) render(); });
    });
    return {
      upsert: function (post) { changes.set(post.id, post); posts = mergeChanges(posts); render(); },
      remove: function (id) { changes.delete(id); deleted.add(id); posts = posts.filter(function (post) { return post.id !== id; }); render(); }
    };
  }

  function initWrite(root) {
    const find = function (selector, container) { return qs(selector, container || root); };
    const form = find('#qaForm');
    if (!form) return;
    const user = getAuthUser();
    const errorBox = find('#formError');
    Promise.resolve(authReady || user).then(function (profile) {
      for (const [selector, value] of [['#writeCompany', profile && profile.company], ['#writeDepartment', profile && profile.department], ['#writeAuthor', profile && (profile.name || profile.loginId)], ['#writeEmail', profile && profile.email]]) {
        const field = find(selector);
        if (field) field.value = value || '-';
      }
      const notice = find('[data-auth-state]');
      if (notice) notice.textContent = profile ? '로그인한 사용자 정보로 문의가 등록됩니다.' : '로그인 상태를 확인하지 못했습니다. 새로고침 후 다시 시도해주세요.';
    });
    form.addEventListener('submit', async function (event) {
      event.preventDefault();
      console.info('[QA] feedback submit started');
      errorBox.style.display = 'none';
      const currentUser = await (authReady || Promise.resolve(getAuthUser()));
      console.info('[QA] SSO user resolved:', Boolean(currentUser), currentUser ? { hasRequesterId: Boolean(currentUser.requesterId), hasTenantId: Boolean(currentUser.requesterTenantId), hasPhone: Boolean(currentUser.phone) } : null);
      if (!currentUser) { errorBox.textContent = '로그인 후 문의를 등록할 수 있습니다.'; errorBox.style.display = 'block'; return; }
      if (!currentUser.requesterId || !currentUser.requesterTenantId) { errorBox.textContent = 'SSO에서 작성자 UUID와 테넌트 정보를 확인하지 못했습니다. 다시 로그인한 뒤 시도해주세요.'; errorBox.style.display = 'block'; return; }
      const title = find('#title').value.trim();
      const content = find('#content').value.trim();
      if (!find('#category').value || !title || !content) { errorBox.textContent = '구분, 제목, 내용을 모두 입력해주세요.'; errorBox.style.display = 'block'; return; }
      const feedbackId = makeUuid();
      const createdAt = new Date().toISOString();
      const post = { id: feedbackId, feedbackId: feedbackId, requesterId: currentUser.requesterId, requesterTenantId: currentUser.requesterTenantId, category: find('#category').value, company: currentUser.company || currentUser.tenantName || currentUser.familyCompany || '외부 사용자', department: currentUser.department || '-', author: currentUser.name || currentUser.loginId, title: title, date: formatKoreanDateTime(createdAt, false), dateTime: formatKoreanDateTime(createdAt, true), createdAt: createdAt, status: '신규', secret: find('#secret').checked, content: content };
      const submitButton = find('#submitButton');
      submitButton.disabled = true;
      submitButton.textContent = '등록 중...';
      try {
        const submission = await buildFeedbackSubmission(post, feedbackId, find('#attachment').files);
        console.info('[QA] sending feedback to Worker:', config.createFeedbackPath);
        const result = await postToApi(config.createFeedbackPath, submission.body);
        console.info('[QA] Worker feedback response:', result);
        post.id = result.id || post.id;
        post.attachments = submission.attachments;
        savePost(post);
        showToast(result.local ? '테스트 글로 저장했습니다. UUID가 생성되었습니다.' : '문의가 등록되었습니다.');
        if (inquiryUI) inquiryUI.saved(post);
        else window.setTimeout(function () { window.location.href = 'detail.html?id=' + encodeURIComponent(post.id); }, 500);
      } catch (error) {
        console.error('[QA] feedback submit failed:', error);
        errorBox.textContent = error.message || '등록 중 오류가 발생했습니다.';
        errorBox.style.display = 'block';
        submitButton.disabled = false;
        submitButton.textContent = '문의 등록';
      }
    });
  }

  async function initDetail(root, requestedId) {
    const find = function (selector, container) { return qs(selector, container || root); };
    const detail = find('#detail');
    if (!detail) return;
    const detailListLink = find('.detail-actions > a', detail);
    if (detailListLink) detailListLink.textContent = '목록으로';
    const bottomBackButton = find('#backButton', detail);
    if (bottomBackButton && bottomBackButton.parentElement) bottomBackButton.parentElement.remove();
    const id = requestedId || new URLSearchParams(window.location.search).get("id") || "EG-1048";
    const storedPost = getPosts().find(function (item) { return item.id === id; });
    let post = storedPost;
    try {
      const result = await requestJson("/api/feedbacks/" + encodeURIComponent(id), { method: "GET" });
      const remotePost = normalizeRemotePost(result.feedback || result.data || result);
      if (remotePost.id) post = Object.assign({}, storedPost || {}, remotePost);
    } catch (error) {
      console.warn("[QA] feedback detail load failed:", error.message);
    }
    if (!post) {
      find('[data-detail-title]').textContent = '문의 내용을 찾을 수 없습니다.';
      find('[data-detail-content]').textContent = '목록에 등록된 문의가 없습니다.';
      const commentBox = find('.comment-box');
      if (commentBox) commentBox.hidden = true;
      return;
    }
    find('[data-detail-category]').textContent = post.category;
    find('[data-detail-title]').textContent = post.title;
    const renderDetailStatus = function () {
      const statusElement = find("[data-detail-status]");
      const status = normalizeStatus(post.status) || "공지";
      if (!statusElement) return;
      statusElement.textContent = status;
      statusElement.classList.toggle("done", status === "완료");
      statusElement.classList.toggle("review", status !== "완료");
      if (statusElement.setAttribute) statusElement.setAttribute('data-status', status);
    };
    renderDetailStatus();
    find('[data-detail-date]').textContent = post.dateTime || post.date;
    find('[data-detail-author]').textContent = post.author;
    const detailUser = await (authReady || Promise.resolve(getAuthUser()));
    find('[data-detail-company]').textContent = getPostCompanyLabel(post, detailUser);
    find('[data-detail-department]').textContent = post.department;
    find('[data-detail-content]').textContent = post.content;
    find('[data-detail-secret]').hidden = !post.secret;
    const attachmentBox = find('[data-detail-attachments]');
    const attachments = Array.isArray(post.attachments) ? post.attachments : [];
    if (attachmentBox) attachmentBox.innerHTML = attachments.length ? attachments.map(function (attachment) {
      const file = normalizeFeedbackAttachment(attachment);
      if (!file.url) return '<div class="attachment-item">📎 ' + escapeHtml(file.name) + '</div>';
      return '<div class="attachment-item"><a href="' + escapeHtml(file.url) + '" target="_blank" rel="noopener noreferrer">📎 ' + escapeHtml(file.name) + '</a></div>';
    }).join('') : '<span class="help-text">첨부된 파일이 없습니다.</span>';
    const editButton = find('#editButton');
    const deleteButton = find('#deleteButton');
    const editForm = find('#editForm');
    const editError = find('#editError');
    const completionNotice = find("#completionNotice");
    const completionDoneNotice = find("#completionDoneNotice");
    const completionButton = find("#completionButton");
    const renderCompletionNotice = function () {
      const owner = isPostOwner(post, detailUser);
      const completed = normalizeStatus(post.status) === "완료" || post.completionConfirmed;
      const visible = owner && !completed && post.completionRequested;
      if (completionNotice) completionNotice.hidden = !visible;
      if (completionDoneNotice) completionDoneNotice.hidden = !(owner && completed);
    };
    const ownerActions = function () {
      const owner = isPostOwner(post, detailUser);
      if (editButton) editButton.hidden = !owner;
      if (deleteButton) deleteButton.hidden = !owner;
      renderCompletionNotice();
    };
    ownerActions();
    if (completionButton) completionButton.addEventListener("click", async function () {
      if (!post.completionRequested || post.completionConfirmed) return;
      completionButton.disabled = true;
      completionButton.textContent = "확인 처리 중...";
      try {
        await requestJson("/api/feedbacks/" + encodeURIComponent(post.id) + "/completion-confirmation", { method: "POST" });
        post.completionRequested = false;
        post.completionConfirmed = true;
        post.status = "완료";
        updateStoredPost(post);
        if (inquiryUI) inquiryUI.changed(post);
        renderDetailStatus();
        renderCompletionNotice();
        showToast("문의가 완료 처리되었습니다.");
      } catch (error) {
        showToast(error.message || "문의 완료 확인에 실패했습니다.");
      } finally {
        completionButton.disabled = false;
        completionButton.textContent = "완료 확인";
      }
    });
    if (editButton && editForm) editButton.addEventListener('click', function () {
      find('#editCategory').value = post.category || '일반문의';
      find('#editTitle').value = post.title || '';
      find('#editContent').value = post.content || '';
      find('#editSecret').checked = Boolean(post.secret);
      editError.hidden = true;
      editError.style.display = 'none';
      editForm.hidden = false;
      detail.classList.add('is-editing');
      editForm.scrollIntoView({ behavior: 'smooth', block: 'start' });
      if (inquiryUI) inquiryUI.markClean(editForm);
    });
    const editCancel = find('#editCancel');
    if (editCancel && editForm) editCancel.addEventListener('click', function () {
      if (inquiryUI && !inquiryUI.discardForm(editForm)) return;
      editForm.reset(); editForm.hidden = true; detail.classList.remove('is-editing');
      if (inquiryUI) inquiryUI.markClean(editForm);
    });
    if (editForm) editForm.addEventListener('submit', async function (event) {
      event.preventDefault();
      editError.hidden = true;
      editError.style.display = 'none';
      const title = find('#editTitle').value.trim();
      const content = find('#editContent').value.trim();
      const category = find('#editCategory').value;
      if (!title || !content || !category) {
        editError.textContent = '구분, 제목, 내용을 모두 입력해주세요.';
        editError.hidden = false;
        editError.style.display = 'block';
        return;
      }
      const saveButton = find('button[type="submit"]', editForm);
      saveButton.disabled = true;
      saveButton.textContent = '저장 중...';
      try {
        await requestJson('/api/feedbacks/' + encodeURIComponent(post.id), {
          method: 'PATCH',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ title: title, contents: content, Category: CATEGORY_CODES[category], is_secret: find('#editSecret').checked ? 'true' : 'false' })
        });
        post.category = category;
        post.title = title;
        post.content = content;
        post.secret = find('#editSecret').checked;
        updateStoredPost(post);
        if (inquiryUI) { inquiryUI.changed(post); inquiryUI.markClean(editForm); }
        find('[data-detail-category]').textContent = post.category;
        find('[data-detail-title]').textContent = post.title;
        find('[data-detail-content]').textContent = post.content;
        find('[data-detail-secret]').hidden = !post.secret;
        editForm.hidden = true;
        detail.classList.remove('is-editing');
        showToast('문의가 수정되었습니다.');
      } catch (error) {
        editError.textContent = error.message || '문의 수정에 실패했습니다.';
        editError.hidden = false;
        editError.style.display = 'block';
      } finally {
        saveButton.disabled = false;
        saveButton.textContent = '수정 저장';
      }
    });
    if (deleteButton) deleteButton.addEventListener('click', async function () {
      if (!window.confirm('이 문의를 삭제하시겠습니까?')) return;
      deleteButton.disabled = true;
      try {
        await requestJson('/api/feedbacks/' + encodeURIComponent(post.id), { method: 'DELETE' });
        removeStoredPost(post.id);
        if (inquiryUI) inquiryUI.deleted(post.id);
        else window.location.href = 'index.html';
      } catch (error) {
        deleteButton.disabled = false;
        showToast(error.message || '문의 삭제에 실패했습니다.');
      }
    });
    function safeMediaUrl(value) {
      value = String(value || '');
      return /^(https?:\/\/|\/|blob:)/i.test(value) ? value : '';
    }

    function normalizeAttachment(attachment) {
      if (typeof attachment === 'string') return { name: '첨부 이미지', url: safeMediaUrl(attachment), thumbnailUrl: safeMediaUrl(attachment) };
      attachment = attachment || {};
      const url = attachment.url || attachment.download_url || attachment.downloadUrl || attachment.signed_url || attachment.signedUrl || attachment.presigned_url || attachment.presignedUrl || '';
      const thumbnailUrl = attachment.thumbnail_url || attachment.thumbnailUrl || attachment.thumb_url || attachment.thumbUrl || url;
      return {
        name: attachment.original_file_name || attachment.originalFileName || attachment.file_name || attachment.fileName || attachment.name || '첨부 이미지',
        url: safeMediaUrl(url),
        thumbnailUrl: safeMediaUrl(thumbnailUrl)
      };
    }

    function normalizeComment(comment) {
      comment = comment || {};
      const rawAttachments = comment.attachments || comment.images || comment.comment_attachments || comment.commentAttachments || [];
      return {
        id: String(comment.id || comment.comment_id || comment.commentId || '').trim(),
        authorId: comment.author_id || comment.authorId || comment.requester_id || comment.requesterId || '',
        author: comment.author_name || comment.authorName || comment.author?.name || comment.author || '작성자',
        date: comment.date || formatKoreanDateTime(comment.created_at || comment.createdAt || comment.updated_at || '', true),
        content: comment.content || comment.body || '',
        attachments: (Array.isArray(rawAttachments) ? rawAttachments : [rawAttachments]).map(normalizeAttachment)
      };
    }

    function renderCommentAttachments(attachments) {
      return (attachments || []).map(function (attachment) {
        const imageUrl = attachment.thumbnailUrl || attachment.url;
        if (!imageUrl) return '<div class="comment-attachment-name">📎 ' + escapeHtml(attachment.name) + '</div>';
        const linkUrl = attachment.url || imageUrl;
        return '<a class="comment-image-link" href="' + escapeHtml(linkUrl) + '" target="_blank" rel="noopener noreferrer"><img class="comment-image" src="' + escapeHtml(imageUrl) + '" alt="' + escapeHtml(attachment.name) + '" loading="lazy"></a>';
      }).join('');
    }

    let editingCommentId = null;
    const objectUrls = new Set();
    const previewUrls = new Set();
    function imageObjectUrl(file, preview) {
      const url = URL.createObjectURL(file);
      objectUrls.add(url);
      if (preview) previewUrls.add(url);
      return url;
    }
    function clearImagePreview() {
      previewUrls.forEach(function (url) { URL.revokeObjectURL(url); objectUrls.delete(url); });
      previewUrls.clear();
    }
    if (inquiryUI) inquiryUI.onCleanup(root, function () { objectUrls.forEach(function (url) { URL.revokeObjectURL(url); }); });
    function isCommentOwner(comment, user) {
      return matchesAuthorId(comment.authorId, user);
    }

    function renderComments(comments) {
      comments = (comments || []).map(normalizeComment).filter(function (comment) { return comment.content; });
      const usedUrls = new Set(comments.flatMap(function (comment) {
        return comment.attachments.flatMap(function (attachment) { return [attachment.url, attachment.thumbnailUrl]; });
      }));
      objectUrls.forEach(function (url) {
        if (!usedUrls.has(url) && !previewUrls.has(url)) { URL.revokeObjectURL(url); objectUrls.delete(url); }
      });
      find('#commentCount').textContent = comments.length;
      const user = detailUser;
      find('#comments').innerHTML = comments.length ? comments.map(function (comment) {
        const owner = Boolean(comment.id) && isCommentOwner(comment, user);
        const editing = Boolean(editingCommentId) && editingCommentId === comment.id && owner;
        const actions = owner ? '<div class="comment-actions"><button class="button button-outline" type="button" data-comment-edit="' + escapeHtml(comment.id) + '">수정</button><button class="button button-danger" type="button" data-comment-delete="' + escapeHtml(comment.id) + '">삭제</button></div>' : '';
        const content = editing ? '<textarea class="textarea comment-edit-input" data-comment-edit-input maxlength="5000">' + escapeHtml(comment.content) + '</textarea><div class="comment-actions"><button class="button button-outline" type="button" data-comment-cancel>취소</button><button class="button button-primary" type="button" data-comment-save="' + escapeHtml(comment.id) + '">저장</button></div>' : '<div class="comment-content">' + escapeHtml(comment.content) + '</div>';
        return '<div class="comment" data-comment-id="' + escapeHtml(comment.id) + '"><div class="comment-meta"><strong>' + escapeHtml(comment.author) + '</strong><span>' + escapeHtml(comment.date) + '</span></div>' + content + (comment.attachments.length ? '<div class="comment-attachments-list">' + renderCommentAttachments(comment.attachments) + '</div>' : '') + (editing ? '' : actions) + '</div>';
      }).join('') : '<div class="comment-empty">등록된 답변이 없습니다.</div>';
      const storedComments = getComments();
      storedComments[post.id] = comments;
      localStorage.setItem(COMMENTS_KEY, JSON.stringify(storedComments));
      return comments;
    }
    let comments = renderComments(getComments()[post.id] || []);
    const commentsPath = '/api/feedbacks/' + encodeURIComponent(post.id) + '/comments';
    requestJson(commentsPath, { method: 'GET' }).then(function (result) {
      comments = renderComments(result.comments || result.items || []);
    }).catch(function (error) {
      console.warn('[QA] comments load failed:', error.message);
    });
    find('#comments').addEventListener('click', async function (event) {
      const editButton = event.target.closest('[data-comment-edit]');
      const cancelButton = event.target.closest('[data-comment-cancel]');
      const saveButton = event.target.closest('[data-comment-save]');
      const deleteButton = event.target.closest('[data-comment-delete]');
      if (editButton) {
        editingCommentId = editButton.getAttribute('data-comment-edit');
        comments = renderComments(comments);
        const input = find('[data-comment-edit-input]');
        if (input) { input.focus(); input.setSelectionRange(input.value.length, input.value.length); }
        return;
      }
      if (cancelButton) {
        const input = find('[data-comment-edit-input]');
        if (inquiryUI && input && !inquiryUI.discardEditor(input)) return;
        editingCommentId = null; comments = renderComments(comments); return;
      }
      if (saveButton) {
        const commentId = saveButton.getAttribute('data-comment-save');
        const comment = comments.find(function (item) { return item.id === commentId; });
        const input = find('[data-comment-edit-input]');
        const content = input ? input.value.trim() : '';
        if (!content) { showToast('댓글 내용을 입력해주세요.'); return; }
        saveButton.disabled = true;
        try {
          const result = await requestJson(commentsPath + '/' + encodeURIComponent(commentId), { method: 'PATCH', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ content: content }) });
          const updatedComment = normalizeComment(Object.assign({}, comment, result.comment || result, { content: content }));
          comments = comments.map(function (item) { return item.id === commentId ? updatedComment : item; });
          editingCommentId = null;
          renderComments(comments);
          showToast('댓글이 수정되었습니다.');
        } catch (error) { showToast(error.message || '댓글 수정에 실패했습니다.'); saveButton.disabled = false; }
        return;
      }
      if (deleteButton) {
        const commentId = deleteButton.getAttribute('data-comment-delete');
        if (!window.confirm('이 댓글을 삭제하시겠습니까?')) return;
        deleteButton.disabled = true;
        try {
          await requestJson(commentsPath + '/' + encodeURIComponent(commentId), { method: 'DELETE' });
          comments = comments.filter(function (item) { return item.id !== commentId; });
          renderComments(comments);
          showToast('댓글이 삭제되었습니다.');
        } catch (error) { showToast(error.message || '댓글 삭제에 실패했습니다.'); deleteButton.disabled = false; }
      }
    });
    const commentForm = find('#commentForm');
    if (commentForm) commentForm.addEventListener('submit', async function (event) {
      event.preventDefault();
      const contentInput = find('#commentContent');
      const errorBox = find('#commentError');
      const submitButton = find('#commentSubmit');
      const imageInput = find('#commentImages');
      const files = imageInput ? Array.prototype.slice.call(imageInput.files || []) : [];
      const content = contentInput.value.trim();
      errorBox.hidden = true;
      if (!content) { errorBox.textContent = '댓글 내용을 입력해주세요.'; errorBox.hidden = false; return; }
      if (files.some(function (file) { return !/^image\//i.test(file.type); })) { errorBox.textContent = '댓글 첨부는 이미지 파일만 등록할 수 있습니다.'; errorBox.hidden = false; return; }
      if (files.some(function (file) { return file.size > 30 * 1024 * 1024; })) { errorBox.textContent = '댓글 이미지는 파일당 30MB 이하만 등록할 수 있습니다.'; errorBox.hidden = false; return; }
      submitButton.disabled = true;
      submitButton.textContent = '등록 중...';
      try {
        let payload = { content: content };
        if (files.length) {
          payload = new FormData();
          payload.append('content', content);
          files.forEach(function (file) { payload.append('attachments', file, file.name); });
        }
        const result = await postToApi(commentsPath, payload);
        const localAttachments = files.map(function (file) { const url = imageObjectUrl(file); return { name: file.name, url: url, thumbnailUrl: url }; });
        const savedComment = normalizeComment(Object.assign({
          content: content,
          author: (getAuthUser() || {}).name || '작성자',
          createdAt: new Date().toISOString(),
          attachments: localAttachments
        }, result.comment || result.data || result));
        if (!savedComment.id) savedComment.id = normalizeComment(result).id;
        if (!savedComment.authorId) savedComment.authorId = (getAuthUser() || {}).requesterId || '';
        if (!savedComment.attachments.length) savedComment.attachments = localAttachments;
        comments.push(savedComment);
        renderComments(comments);
        contentInput.value = '';
        if (imageInput) imageInput.value = '';
        const imagePreview = find('#commentImagePreview');
        if (imagePreview) imagePreview.innerHTML = '';
        clearImagePreview();
        if (inquiryUI) inquiryUI.markClean(commentForm);
      } catch (error) {
        errorBox.textContent = error.message || '댓글 등록에 실패했습니다.';
        errorBox.hidden = false;
      } finally {
        submitButton.disabled = false;
        submitButton.textContent = '댓글 등록';
      }
    });
    const commentImages = find('#commentImages');
    const commentImagePreview = find('#commentImagePreview');
    const commentImageLabel = find('label[for="commentImages"]');
    if (commentImageLabel) commentImageLabel.textContent = '댓글 이미지 첨부';
    if (commentImages && commentImagePreview) commentImages.addEventListener('change', function () {
      clearImagePreview();
      const files = Array.prototype.slice.call(commentImages.files || []);
      commentImagePreview.innerHTML = files.filter(function (file) { return /^image\//i.test(file.type); }).map(function (file) {
        const url = imageObjectUrl(file, true);
        return '<div class="comment-image-preview-item"><img src="' + escapeHtml(url) + '" alt="' + escapeHtml(file.name) + '"><span>' + escapeHtml(file.name) + '</span></div>';
      }).join('');
    });
    refreshRemoteStatus(post).then(function (changed) {
      if (changed && (!inquiryUI || inquiryUI.isCurrent(root))) {
        renderDetailStatus();
        if (inquiryUI) inquiryUI.changed(post);
      }
    });
  }

  function initInquiryUI(list) {
    const dialogs = { write: qs('#composeModal'), detail: qs('#detailModal') };
    if (!dialogs.write || !dialogs.detail) return;
    const baselines = new WeakMap();
    let active = null;
    let restoringHistory = false;
    let depth = 0;

    function snapshot(form) {
      return JSON.stringify(Array.from(form.elements).filter(function (input) {
        return !input.readOnly && !input.disabled && !['submit', 'button'].includes(input.type);
      }).map(function (input) {
        return [input.id, input.type === 'file' ? Array.from(input.files).map(function (file) { return [file.name, file.size, file.lastModified]; }) : input.type === 'checkbox' ? input.checked : input.value];
      }));
    }

    function dirty(form) { return !form.hidden && snapshot(form) !== baselines.get(form); }
    function dirtyEditor(input) { return input.value !== input.defaultValue; }
    function busy() { return active && Boolean(active.root.querySelector('button:disabled')); }
    function hasChanges() {
      return active && (qsa('form', active.root).some(dirty) || qsa('[data-comment-edit-input]', active.root).some(dirtyEditor));
    }
    function confirmDiscard() { return window.confirm('작성 중인 내용이 있습니다. 닫으면 입력한 내용이 사라집니다. 닫으시겠습니까?'); }
    function canLeave(force) {
      if (force || !active) return true;
      if (busy()) { showToast('처리가 끝난 후 닫을 수 있습니다.'); return false; }
      return !hasChanges() || confirmDiscard();
    }

    function clear(restoreFocus) {
      if (!active) return;
      const previous = active;
      active = null;
      previous.dialog.close();
      previous.cleanups.forEach(function (cleanup) { cleanup(); });
      const toast = qs('#toast');
      if (toast) document.body.append(toast);
      previous.dialog.querySelector('[data-modal-content]').replaceChildren();
      document.documentElement.classList.remove('inquiry-modal-open');
      if (restoreFocus) {
        window.scrollTo({ top: previous.scroll, behavior: 'instant' });
        const opener = previous.opener && previous.opener.isConnected ? previous.opener : qs('#writeButton') || qs('#boardHeading');
        if (opener) opener.focus({ preventScroll: true });
      }
    }

    function routeURL(view, id) {
      const url = new URL(window.location.href);
      url.searchParams.delete('view'); url.searchParams.delete('id');
      if (view) url.searchParams.set('view', view);
      if (view === 'detail' && id) url.searchParams.set('id', id);
      return url;
    }

    async function mount(view, id, opener) {
      const scroll = active ? active.scroll : window.scrollY;
      const previousOpener = active && active.opener;
      clear(false);
      const dialog = dialogs[view];
      if (!dialog) return;
      const root = document.createElement('div');
      root.setAttribute('aria-busy', view === 'detail' ? 'true' : 'false');
      root.append(qs(view === 'write' ? '#writeTemplate' : '#detailTemplate').content.cloneNode(true));
      dialog.querySelector('[data-modal-content]').replaceChildren(root);
      const toast = qs('#toast');
      if (toast) dialog.append(toast);
      active = { view: view, id: id, root: root, dialog: dialog, opener: opener || previousOpener, scroll: scroll, cleanups: [] };
      qsa('form', root).forEach(function (form) { baselines.set(form, snapshot(form)); });
      document.documentElement.classList.add('inquiry-modal-open');
      dialog.showModal();
      const heading = root.querySelector('h2');
      if (heading) heading.focus({ preventScroll: true });
      try {
        if (view === 'write') initWrite(root);
        else if (id) await initDetail(root, id);
        else {
          root.querySelector('[data-detail-title]').textContent = '문의 내용을 찾을 수 없습니다.';
          root.querySelector('.comment-box').hidden = true;
        }
      } catch (error) {
        if (active && active.root === root) showToast('화면을 불러오지 못했습니다. 잠시 후 다시 시도해주세요.');
        console.warn('[QA] dialog initialization failed:', error.message);
      } finally {
        root.setAttribute('aria-busy', 'false');
      }
    }

    function open(view, id, opener, options) {
      options = options || {};
      if (!canLeave(options.force)) return;
      const url = routeURL(view, id);
      if (active || options.replace) history.replaceState({ qaModal: true }, '', url);
      else history.pushState({ qaModal: true }, '', url);
      depth = 1;
      mount(view, id, opener);
    }

    function close(force) {
      if (!canLeave(force)) return;
      clear(true);
      if (depth === 1) history.back();
      else history.replaceState({ qaModal: false }, '', routeURL());
    }

    inquiryUI = {
      open: open,
      isCurrent: function (root) { return Boolean(active && active.root === root); },
      markClean: function (form) { baselines.set(form, snapshot(form)); },
      discardForm: function (form) { return !dirty(form) || confirmDiscard(); },
      discardEditor: function (input) { return !dirtyEditor(input) || confirmDiscard(); },
      onCleanup: function (root, callback) { if (active && active.root === root) active.cleanups.push(callback); else callback(); },
      changed: function (post) { if (list) list.upsert(post); },
      saved: function (post) { if (list) list.upsert(post); open('detail', post.id, null, { force: true, replace: true }); },
      deleted: function (id) { if (list) list.remove(id); close(true); }
    };

    qsa('[data-open-write]').forEach(function (button) {
      button.addEventListener('click', function (event) { event.preventDefault(); open('write', null, button); });
    });
    Object.values(dialogs).forEach(function (dialog) {
      dialog.addEventListener('cancel', function (event) { event.preventDefault(); close(false); });
      dialog.addEventListener('click', function (event) {
        if (event.target.closest('[data-modal-close]')) { close(false); return; }
        const rect = dialog.getBoundingClientRect();
        if (event.target === dialog && (event.clientX < rect.left || event.clientX > rect.right || event.clientY < rect.top || event.clientY > rect.bottom)) close(false);
      });
    });
    window.addEventListener('beforeunload', function (event) {
      if (hasChanges() || busy()) { event.preventDefault(); event.returnValue = ''; }
    });
    window.addEventListener('popstate', function (event) {
      if (restoringHistory) { restoringHistory = false; return; }
      const nextDepth = event.state && event.state.qaModal ? 1 : 0;
      if (!canLeave(false)) {
        restoringHistory = true;
        history.go(depth > nextDepth ? 1 : -1);
        return;
      }
      depth = nextDepth;
      const url = new URL(window.location.href);
      const view = url.searchParams.get('view');
      if (view === 'write' || view === 'detail') mount(view, url.searchParams.get('id'));
      else clear(true);
    });

    const initial = new URL(window.location.href);
    const view = initial.searchParams.get('view');
    history.replaceState({ qaModal: false }, '', routeURL());
    if (view === 'write' || view === 'detail') open(view, initial.searchParams.get('id'));
  }

  document.addEventListener('DOMContentLoaded', function () {
    normalizePageHeading(); bindGlobal();
    const list = initList();
    if (qs('#composeModal')) initInquiryUI(list);
    else { initWrite(); initDetail(); }
  });
})();