import './styles/common.css';
import './styles/login.css';
import { state, loadMasterDataFromDB, saveAsset } from './core/state';
import { renderNavigation } from './components/Navigation';
import { renderDashboard } from './views/DashboardView';
import { renderSWTable } from './views/SW_Table';
import { renderLocationView } from './views/LocationView';
import { renderAuditApprovalView } from './views/AuditApprovalView';
import { MapEditor } from './views/MapEditor';
import { initBaseModal } from './components/Modal/BaseModal';
import { initHwModal, openHwModal } from './components/Modal/HWModal';
import { initSwModal, openSwModal } from './components/Modal/SWModal';
import { initSwUserModal } from './components/Modal/SWUserModal';
import { initDomainModal, openDomainModal } from './components/Modal/DomainModal';
import { initPartsMasterModal, openPartsMasterModal } from './components/Modal/PartsMasterModal';
import { initJobSpecModal, openJobSpecModal } from './components/Modal/JobSpecModal';
import { initUserModal, openUserModal } from './components/Modal/UserModal';
import { activePartsMasterSubTab } from './views/List/PartsMasterListView';
import { initDashboardDetailModal } from './components/Modal/DashboardDetailModal';
import { initGuide } from './components/Guide';
import { pcFlowModal } from './components/Modal/PCFlowModal';
import { createIcons, Plus, X, LayoutDashboard, Monitor, Server, Database, Laptop, CalendarClock, Key, Cpu, Layers, Users, Paperclip, Edit2, History, RefreshCcw, BookOpen, Settings } from 'lucide';

interface AuthSessionResponse {
  authenticated: boolean;
  user: unknown;
}

let phoneLoginPollTimer: number | undefined;


let activeMapEditorInstance: MapEditor | null = null;

// 화면 갱신 통합 핸들러
async function refreshView(tab?: string) {
  const mainContent = document.getElementById('main-content')!;
  if (!mainContent) return;

  // Clean up any active MapEditor instance when navigating away
  if (activeMapEditorInstance) {
    activeMapEditorInstance.destroy();
    activeMapEditorInstance = null;
  }

  const activeTab = tab || state.activeSubTab;

  if (activeTab === '대시보드') {
    renderDashboard(mainContent);
    return;
  }

  if (activeTab === '실사 승인') {
    await renderAuditApprovalView(mainContent);
    return;
  }

  if (activeTab === '위치지정') {
    // Render Map Editor directly into main content to maximize working area
    mainContent.innerHTML = `
      <div class="map-editor-page-wrapper" style="display: flex; flex: 1; height: calc(100vh - var(--header-height) - 48px); overflow: hidden; width: 100%;">
        <!-- Left: File Selector -->
        <div class="file-sidebar" id="file-sidebar"></div>

        <!-- Center: Main Editor -->
        <div class="editor-container" id="container">
          <div class="img-wrapper" id="wrapper">
            <img src="" id="target-img" alt="Map Image">
          </div>
        </div>

        <!-- Right: Control Panel -->
        <div class="sidebar">
          <h2>Map Editor <small class="editor-version">v3.0</small></h2>
          <div class="current-path" id="current-path">파일을 선택하세요</div>
          <p>
            드래그하여 구역을 정의하세요. 저장 버튼을 누르면 즉시 시스템에 반영됩니다.
          </p>

          <div class="box-list" id="box-list"></div>

          <div class="actions" style="display: flex; flex-direction: column; gap: 0.5rem;">
            <button id="btn-clear-all" class="btn btn-outline">전체 삭제</button>
            <button id="btn-print-map-qrs" class="btn btn-outline btn-primary">이 도면 QR 일괄인쇄</button>
            <button id="btn-save-server" class="btn btn-primary">서버에 즉시 저장</button>
            <div id="save-status"></div>
          </div>
        </div>
      </div>
    `;

    // Initialize MapEditor instance
    const editor = new MapEditor();
    await editor.init();
    activeMapEditorInstance = editor;
    return;
  }

  // 서버 탭이 아닐 경우에는 state.viewMode가 location이더라도 강제로 목록(list) 뷰를 그리도록 함
  // (state.viewMode의 원래 상태는 보존하여, 서버 탭 복귀 시 최근 보던 모드를 유지함)
  const isServerTab = activeTab === '서버';
  const effectiveViewMode = isServerTab ? state.viewMode : 'list';
  
  mainContent.innerHTML = `
    <div id="view-body" class="view-container"></div>
  `;

  const viewBody = document.getElementById('view-body')!;
  if (effectiveViewMode === 'location') {
    renderLocationView(viewBody);
  } else {
    renderSWTable(viewBody);    // 리스트 형식
  }
}

// 통합 갱신 (저장은 이미 개별 모달에서 처리됨)
async function refreshAllData() {
    await loadMasterDataFromDB();
    refreshView();
}

// --- App Initialization ---
function initApp() {
  const mainContent = document.getElementById('main-content')!;
  if (!mainContent) return;

  const { closeAllModals } = initBaseModal(); 

  try {
    renderNavigation((tab) => {
      refreshView();
    });

    initHwModal(() => refreshAllData(), closeAllModals);
    initSwModal(() => refreshAllData(), closeAllModals);
    initSwUserModal(() => { 
        loadMasterDataFromDB().then(() => refreshView());
    }, closeAllModals);
    initDomainModal(() => refreshAllData(), closeAllModals);
    initPartsMasterModal(() => refreshAllData(), closeAllModals);
    initJobSpecModal(() => refreshAllData(), closeAllModals);
    initUserModal(() => refreshAllData(), closeAllModals);
    
    initDashboardDetailModal();
    initGuide();
    pcFlowModal.init(() => {
      loadMasterDataFromDB().then(() => refreshView());
    });

    loadMasterDataFromDB().then((success) => {
      if (success) {
        refreshView();
        initRoleSwitcher(); // [추가] 역할 전환 토글 초기화
      }
    });
  } catch (e) { console.error('❌ Initialization failed:', e); }

  console.log('🚀 ITAM App Multi-Table Optimized');

  // --- 통합 이벤트 위임 (Dynamic Elements 지원) ---
  document.addEventListener('click', (e) => {
    const target = e.target as HTMLElement;
    
    // 자산 추가
    if (target.closest('#btn-add-asset')) {
      const tab = state.activeSubTab;
      const cat = state.activeCategory;
      const newId = Math.random().toString(36).substring(2, 9);
      
      if (cat === 'hw') {
        if (tab === '부품 마스터') {
          if (activePartsMasterSubTab === 'job-spec') {
            openJobSpecModal({ id: '' } as any, 'add');
          } else {
            openPartsMasterModal({ id: '' } as any, 'add');
          }
        } else {
          openHwModal({ id: newId, asset_code: '', category: tab } as any, 'add');
        }
      } else if (cat === 'sw') {
        const swType = tab === '외부SW' ? '외부SW' : (tab === '내부SW' ? '내부SW' : '외부SW');
        openSwModal({ id: newId, asset_type: swType } as any, 'add');
      } else if (cat === 'ops') {
        if (tab === '도메인') openDomainModal(null);
        else if (tab === '사용자') openUserModal({ id: '' }, 'add');
      }
      return;
    }

    // 부품 마스터 탭으로 바로가기 연동
    if (target.closest('#btn-goto-parts-master')) {
      state.activeCategory = 'hw';
      state.activeSubTab = '부품 마스터';
      renderNavigation((tab) => { refreshView(); });
      refreshView();
      return;
    }

    // PC 이동/반납 모달 열기
    if (target.closest('#btn-pc-flow')) {
      pcFlowModal.open();
      return;
    }
  });

  createIcons({
    icons: { Plus, X, LayoutDashboard, Monitor, Server, Database, Laptop, CalendarClock, Key, Cpu, Layers, Users, Paperclip, Edit2, History, RefreshCcw, BookOpen, Settings }
  });
  window.addEventListener('refresh-view', () => refreshView());
}

/**
 * 헤더 역할 전환 토글 로직
 */
function initRoleSwitcher() {
  const checkbox = document.getElementById('role-toggle-checkbox') as HTMLInputElement;
  const userLabel = document.querySelector('.role-label.user');
  const adminLabel = document.querySelector('.role-label.admin');

  if (!checkbox || !userLabel || !adminLabel) return;

  checkbox.addEventListener('change', () => {
    if (checkbox.checked) {
      state.currentUserRole = 'admin';
      userLabel.classList.remove('active');
      adminLabel.classList.add('active');
      document.body.classList.add('admin-mode');
      
      // 관리자 모드 전환 시 대시보드로 이동
      state.activeCategory = 'hw';
      state.activeSubTab = '대시보드';
    } else {
      state.currentUserRole = 'user';
      adminLabel.classList.remove('active');
      userLabel.classList.add('active');
      document.body.classList.remove('admin-mode');
      
      // 실무자 모드 전환 시 서버 목록으로 이동
      state.activeCategory = 'hw';
      state.activeSubTab = '서버';
    }
    // 모든 렌더링을 refreshView 하나로 통합하여 규격 유지
    renderNavigation(() => refreshView());
    refreshView();
  });
}

/**
 * 앱 초기화 (로그인 과정 없이 즉시 시작)
 */
function initializeAppDirectly() {
  const loginContainer = document.getElementById('login-container');
  const appLayout = document.getElementById('app-layout');

  // 기본 권한 설정: 실무자 (User)
  state.currentUserRole = 'user';
  state.activeCategory = 'hw';
  state.activeSubTab = '서버'; // 실무자 기본 탭

  // 화면 전환
  if (loginContainer) loginContainer.style.display = 'none';
  if (appLayout) appLayout.style.display = 'flex';

  // 앱 초기화 및 내비게이션(헤더 포함) 렌더링
  initApp();
  renderNavigation((tab) => refreshView(tab));
}

function showLoginScreen(errorMessage?: string) {
  const loginContainer = document.getElementById('login-container');
  const appLayout = document.getElementById('app-layout');
  const loginError = document.getElementById('login-error');
  const phoneLoginError = document.getElementById('phone-login-error');
  const phoneLoginStatus = document.getElementById('phone-login-status');
  const loginForm = document.getElementById('login-form') as HTMLFormElement | null;
  const phoneLoginForm = document.getElementById('phone-login-form') as HTMLFormElement | null;
  const loginModeTabs = document.querySelectorAll<HTMLButtonElement>('.login-mode-tab');

  if (appLayout) appLayout.style.display = 'none';
  if (loginContainer) loginContainer.style.display = 'flex';

  const setMessage = (element: HTMLElement | null, message?: string) => {
    if (!element) return;
    if (message) {
      element.textContent = message;
      element.removeAttribute('hidden');
    } else {
      element.textContent = '';
      element.setAttribute('hidden', 'true');
    }
  };

  setMessage(loginError, errorMessage);
  setMessage(phoneLoginError, undefined);
  setMessage(phoneLoginStatus, undefined);

  const switchLoginMode = (mode: 'password' | 'phone') => {
    if (loginForm) loginForm.hidden = mode !== 'password';
    if (phoneLoginForm) phoneLoginForm.hidden = mode !== 'phone';
    loginModeTabs.forEach((tab) => tab.classList.toggle('active', tab.dataset.mode === mode));
    setMessage(loginError, mode === 'password' ? errorMessage : undefined);
    setMessage(phoneLoginError, mode === 'phone' ? errorMessage : undefined);
  };

  loginModeTabs.forEach((tab) => {
    if (!tab.dataset.bound) {
      tab.dataset.bound = 'true';
      tab.addEventListener('click', () => switchLoginMode((tab.dataset.mode as 'password' | 'phone') || 'password'));
    }
  });

  const clearPhonePollTimer = () => {
    if (phoneLoginPollTimer) {
      window.clearTimeout(phoneLoginPollTimer);
      phoneLoginPollTimer = undefined;
    }
  };

  const pollPhoneLogin = async (pendingRef: string, intervalMs: number) => {
    clearPhonePollTimer();
    phoneLoginPollTimer = window.setTimeout(async () => {
      try {
        const response = await fetch('/api/auth/headless/phone/poll', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ pendingRef })
        });
        const payload = await response.json();

        if (!response.ok) {
          const message = payload.redirectTo
            ? '접근 권한이 없는 테넌트입니다. 관리자에게 문의하세요.'
            : (payload.error || '전화번호 로그인 확인에 실패했습니다.');
          clearPhonePollTimer();
          setMessage(phoneLoginStatus, undefined);
          setMessage(phoneLoginError, message);
          return;
        }

        if (payload.status === 'authenticated') {
          clearPhonePollTimer();
          initializeAppDirectly();
          return;
        }

        setMessage(phoneLoginStatus, '모바일에서 인증 링크를 승인하는 중입니다. 승인 후 자동으로 로그인됩니다.');
        pollPhoneLogin(payload.pendingRef || pendingRef, payload.intervalMs || intervalMs);
      } catch (error) {
        console.error('Phone SSO poll failed:', error);
        clearPhonePollTimer();
        setMessage(phoneLoginStatus, undefined);
        setMessage(phoneLoginError, '전화번호 로그인 확인 중 오류가 발생했습니다.');
      }
    }, intervalMs);
  };

  if (loginForm && !loginForm.dataset.bound) {
    loginForm.dataset.bound = 'true';
    loginForm.addEventListener('submit', async (event) => {
      event.preventDefault();
      const submitButton = document.getElementById('login-submit') as HTMLButtonElement | null;
      const loginId = (document.getElementById('login-id') as HTMLInputElement | null)?.value.trim() || '';
      const password = (document.getElementById('login-password') as HTMLInputElement | null)?.value || '';

      if (!loginId || !password) {
        showLoginScreen('사번과 비밀번호를 입력하세요.');
        return;
      }

      if (submitButton) {
        submitButton.disabled = true;
        submitButton.textContent = '로그인 중...';
      }

      try {
        const response = await fetch('/api/auth/headless/login', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ loginId, password })
        });
        const payload = await response.json();

        if (!response.ok) {
          const message = payload.redirectTo
            ? '접근 권한이 없는 테넌트입니다. 관리자에게 문의하세요.'
            : (payload.error || '로그인에 실패했습니다.');
          showLoginScreen(message);
          return;
        }

        initializeAppDirectly();
      } catch (error) {
        console.error('SSO login failed:', error);
        showLoginScreen('로그인 요청 처리 중 오류가 발생했습니다.');
      } finally {
        if (submitButton) {
          submitButton.disabled = false;
          submitButton.textContent = '로그인';
        }
      }
    });
  }

  if (phoneLoginForm && !phoneLoginForm.dataset.bound) {
    phoneLoginForm.dataset.bound = 'true';
    phoneLoginForm.addEventListener('submit', async (event) => {
      event.preventDefault();
      const submitButton = document.getElementById('phone-login-submit') as HTMLButtonElement | null;
      const loginId = (document.getElementById('phone-login-id') as HTMLInputElement | null)?.value.trim() || '';

      if (!loginId) {
        setMessage(phoneLoginError, '전화번호를 입력하세요.');
        return;
      }

      clearPhonePollTimer();
      setMessage(phoneLoginError, undefined);
      setMessage(phoneLoginStatus, '인증 링크를 요청하는 중입니다...');

      if (submitButton) {
        submitButton.disabled = true;
        submitButton.textContent = '링크 전송 중...';
      }

      try {
        const response = await fetch('/api/auth/headless/phone/init', {
          method: 'POST',
          headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ loginId })
        });
        const payload = await response.json();

        if (!response.ok) {
          setMessage(phoneLoginStatus, undefined);
          setMessage(phoneLoginError, payload.error || '전화번호 로그인 시작에 실패했습니다.');
          return;
        }

        setMessage(phoneLoginStatus, payload.message || '인증 링크를 발송했습니다. 모바일에서 승인해 주세요.');
        pollPhoneLogin(payload.pendingRef, payload.intervalMs || 3000);
      } catch (error) {
        console.error('Phone SSO init failed:', error);
        setMessage(phoneLoginStatus, undefined);
        setMessage(phoneLoginError, '전화번호 로그인 요청 중 오류가 발생했습니다.');
      } finally {
        if (submitButton) {
          submitButton.disabled = false;
          submitButton.textContent = '인증 링크 보내기';
        }
      }
    });
  }

  switchLoginMode('password');
}

async function bootstrapApp() {
  const params = new URLSearchParams(window.location.search);
  const authError = params.get('auth_error_description') || params.get('auth_error');

  try {
    const response = await fetch('/api/auth/session');
    const sessionInfo = await response.json() as AuthSessionResponse;
    if (response.ok && sessionInfo.authenticated) {
      initializeAppDirectly();
      return;
    }
  } catch (error) {
    console.error('Failed to load auth session:', error);
  }

  showLoginScreen(authError || undefined);
}

document.addEventListener('DOMContentLoaded', bootstrapApp);