import { useState, useEffect, useCallback } from 'react';
import { useReplay } from './hooks/useReplay';
import { useMonitor } from './hooks/useMonitor';
import { useLocalStorage } from './hooks/useLocalStorage';
import type { AppMode } from './types';
import { useTheme } from './hooks/useTheme';
import { useAuth } from './hooks/useAuth';
import { useTranslation } from 'react-i18next';
import LoginPage from './components/auth/LoginPage';
import CollectorMonitor from './components/common/CollectorMonitor';
import { SharedFilterProvider } from './contexts/SharedFilterContext';
import { FontScaleProvider } from './contexts/FontScaleContext';
import { IranDashboard } from './components/iran/IranDashboard';
import { KoreaDashboard } from './components/korea/KoreaDashboard';
import './App.css';

function App() {
  const { user, isLoading: authLoading, isAuthenticated, login, devLogin, logout } = useAuth();

  if (authLoading) {
    return (
      <div
        className="flex min-h-screen items-center justify-center"
        style={{ backgroundColor: 'var(--kcg-bg)', color: 'var(--kcg-muted)' }}
      >
        Loading...
      </div>
    );
  }

  if (!isAuthenticated) {
    return <LoginPage onGoogleLogin={login} onDevLogin={devLogin} />;
  }

  return <AuthenticatedApp user={user} onLogout={logout} />;
}

interface AuthenticatedAppProps {
  user: { email: string; name: string; picture?: string } | null;
  onLogout: () => Promise<void>;
}

function AuthenticatedApp({ user, onLogout }: AuthenticatedAppProps) {
  const [appMode, setAppMode] = useState<AppMode>('live');
  const [dashboardTab, setDashboardTab] = useLocalStorage<'iran' | 'korea'>('dashboardTab', 'iran');
  const [showCollectorMonitor, setShowCollectorMonitor] = useState(false);
  const [timeZone, setTimeZone] = useState<'KST' | 'UTC'>('KST');

  // 1시간마다 전체 데이터 강제 리프레시
  const [refreshKey, setRefreshKey] = useState(0);
  useEffect(() => {
    const HOUR_MS = 3600_000;
    const interval = setInterval(() => setRefreshKey(k => k + 1), HOUR_MS);
    return () => clearInterval(interval);
  }, []);

  const replay = useReplay();
  const monitor = useMonitor();
  const { theme, toggleTheme } = useTheme();
  const { t, i18n } = useTranslation();
  const toggleLang = useCallback(() => {
    i18n.changeLanguage(i18n.language === 'ko' ? 'en' : 'ko');
  }, [i18n]);

  const isLive = appMode === 'live';
  const currentTime = isLive ? monitor.state.currentTime : replay.state.currentTime;

  return (
    <FontScaleProvider>
    <SharedFilterProvider>
      <div className={`app ${isLive ? 'app-live' : ''}`}>
        <header className="app-header">
          {/* Dashboard Tabs */}
          <div className="dash-tabs">
            <button
              type="button"
              className={`dash-tab ${dashboardTab === 'iran' ? 'active' : ''}`}
              onClick={() => setDashboardTab('iran')}
            >
              <span className="dash-tab-flag">🇮🇷</span>
              {t('tabs.iran')}
            </button>
            <button
              type="button"
              className={`dash-tab ${dashboardTab === 'korea' ? 'active' : ''}`}
              onClick={() => setDashboardTab('korea')}
            >
              <span className="dash-tab-flag">🇰🇷</span>
              {t('tabs.korea')}
            </button>
          </div>

          {/* 탭별 모드/필터 영역 — 각 대시보드가 headerSlot으로 렌더링 */}
          <div id="dashboard-header-slot" />

          <div className="header-info">
            <div id="dashboard-counts-slot" />
            <div className="header-toggles">
              <button
                type="button"
                className="header-toggle-btn"
                onClick={() => setShowCollectorMonitor(v => !v)}
                title="수집기 모니터링"
              >
                MON
              </button>
              <button type="button" className="header-toggle-btn" onClick={toggleLang} title="Language">
                {i18n.language === 'ko' ? 'KO' : 'EN'}
              </button>
              <button type="button" className="header-toggle-btn" onClick={toggleTheme} title="Theme">
                {theme === 'dark' ? '🌙' : '☀️'}
              </button>
            </div>
            <div className="header-status">
              <span className={`status-dot ${isLive ? 'live' : replay.state.isPlaying ? 'live' : ''}`} />
              {isLive ? t('header.live') : replay.state.isPlaying ? t('header.replaying') : t('header.paused')}
            </div>
            {user && (
              <div className="header-user">
                {user.picture && (
                  <img src={user.picture} alt="" className="header-user-avatar" referrerPolicy="no-referrer" />
                )}
                <span className="header-user-name">{user.name}</span>
                <button type="button" className="header-toggle-btn" onClick={onLogout} title="Logout">
                  ⏻
                </button>
              </div>
            )}
          </div>
        </header>

        {dashboardTab === 'iran' && (
          <IranDashboard
            currentTime={currentTime}
            isLive={isLive}
            refreshKey={refreshKey}
            replay={replay}
            monitor={monitor}
            timeZone={timeZone}
            onTimeZoneChange={setTimeZone}
            appMode={appMode}
            onAppModeChange={setAppMode}
          />
        )}

        {dashboardTab === 'korea' && (
          <KoreaDashboard
            currentTime={currentTime}
            isLive={isLive}
            refreshKey={refreshKey}
            replay={replay}
            monitor={monitor}
            timeZone={timeZone}
            onTimeZoneChange={setTimeZone}
          />
        )}

        {showCollectorMonitor && (
          <CollectorMonitor onClose={() => setShowCollectorMonitor(false)} />
        )}
      </div>
    </SharedFilterProvider>
    </FontScaleProvider>
  );
}

export default App;
