import './style.css';
import './app.css';

// Trạng thái cục bộ
let loggedIn = false;
let studentInfo = null;
let stats = {
  wifiSSID: '',
  onlineSecs: 0,
  offlineSecs: 0,
  wsConnected: false,
  serverReachable: false,
  allowedApps: '',
  monitorMode: '',
  monitorLabel: '',
  className: '',
  classCode: '',
  currentPeriod: 0,
  currentCourseName: '',
  shifts: []
};

// Quản lý webcam
let webcamStream = null;
let webcamInterval = null;
const webcamVideo = document.createElement('video');
webcamVideo.autoplay = true;
webcamVideo.playsInline = true;
webcamVideo.style.display = 'none';
document.body.appendChild(webcamVideo);

const webcamCanvas = document.createElement('canvas');
webcamCanvas.width = 320;
webcamCanvas.height = 240;
webcamCanvas.style.display = 'none';
document.body.appendChild(webcamCanvas);

function init() {
  if (typeof window.go === 'undefined' || typeof window.go.main === 'undefined') {
    setTimeout(init, 200);
    return;
  }

  window.runtime.EventsOn('start_webcam_stream', startWebcam);
  window.runtime.EventsOn('stop_webcam_stream', stopWebcam);
  checkLogin();
}

async function checkLogin() {
  try {
    const isLogged = await window.go.main.App.CheckLoginStatus();
    if (isLogged) {
      loggedIn = true;
      studentInfo = await window.go.main.App.GetStudentInfo();
      renderDashboard();
      startStatsTicker();
    } else {
      loggedIn = false;
      renderLoginPrompt();
    }
  } catch (err) {
    console.error('Error checking login status:', err);
  }
}

function renderLoginPrompt() {
  document.querySelector('#app').innerHTML = `
    <div class="login-prompt-container">
      <div class="card">
        <div class="login-brand-row">
          <div class="login-logo">RE</div>
          <div class="login-brand-text">
            <div class="login-brand-name">Simple Care</div>
            <div class="login-brand-sub">Rikkei Education</div>
          </div>
        </div>
        <h2 class="login-title">Đăng nhập sinh viên</h2>
        <p class="login-desc">
          Ứng dụng sẽ chuyển hướng bạn đến trang Rikkei Portal. Sau khi đăng nhập thành công, hệ thống sẽ tự động đồng bộ tài khoản học tập của bạn.
        </p>
        <button class="btn btn-primary" id="btn-goto-login" style="width: 100%; padding: 0.75rem;">
          Đi đến trang đăng nhập
        </button>
      </div>
    </div>
  `;

  document.getElementById('btn-goto-login').addEventListener('click', () => {
    window.go.main.App.NavigateToLogin();
  });
}

function monitorModeMeta(mode) {
  switch (mode) {
    case 'learning':
      return { icon: '🛡️', label: 'Đang giám sát', cls: 'mode-learning' };
    case 'exam':
      return { icon: '📝', label: 'Phòng thi', cls: 'mode-exam' };
    case 'outside_schedule':
      return { icon: '😴', label: 'Ngoài giờ học', cls: 'mode-outside' };
    case 'not_configured':
      return { icon: '⚙️', label: 'Chưa sẵn sàng', cls: 'mode-config' };
    default:
      return { icon: '⏳', label: 'Đang kết nối', cls: 'mode-pending' };
  }
}

function attendanceClass(status) {
  if (status === 4) return 'att-ok';
  if (status === 3) return 'att-late';
  if (status === 1 || status === 2) return 'att-leave';
  if (status === 0) return 'att-absent';
  return 'att-pending';
}

function renderShiftsTable(shifts) {
  if (!shifts || shifts.length === 0) {
    return '<div class="shifts-empty">Hôm nay không có ca học theo lịch lớp.</div>';
  }
  return `
    <table class="shifts-table">
      <thead>
        <tr>
          <th>Ca</th>
          <th>Môn học</th>
          <th>Giờ</th>
          <th>Trực tuyến</th>
          <th>Ngoại tuyến</th>
          <th>Điểm danh</th>
        </tr>
      </thead>
      <tbody>
        ${shifts.map(s => `
          <tr class="${s.isActiveNow ? 'shift-row-active' : ''}">
            <td><strong>Ca ${s.period}</strong>${s.isActiveNow ? ' <span class="shift-now">đang học</span>' : ''}</td>
            <td>${s.courseName || '—'}</td>
            <td class="shift-time">${s.startTime}–${s.endTime}</td>
            <td class="time-online">${formatDuration(s.onlineSeconds || 0)}</td>
            <td class="time-offline">${formatDuration(s.offlineSeconds || 0)}</td>
            <td><span class="att-badge ${attendanceClass(s.attendanceStatus)}">${s.attendanceLabel || 'Chưa tính'}</span></td>
          </tr>
        `).join('')}
      </tbody>
    </table>
  `;
}

function renderDashboard() {
  if (!studentInfo) return;

  const mode = monitorModeMeta(stats.monitorMode);
  const classLine = stats.className
    ? `${stats.className}${stats.classCode ? ` (${stats.classCode})` : ''}`
    : 'Đang xác định lớp...';

  document.querySelector('#app').innerHTML = `
    <div class="dashboard-wrapper">
      <header class="header">
        <div class="brand">
          <div class="brand-logo">RE</div>
          <div class="brand-text">
            <span class="brand-name">Simple Care</span>
            <span class="brand-sub">Rikkei Education</span>
          </div>
        </div>
        <button class="btn btn-logout" id="btn-logout">Đăng xuất</button>
      </header>

      <div class="main-grid">
        <div class="card profile-card">
          <div class="avatar-container">
            <img src="${studentInfo.avatar || 'https://via.placeholder.com/150'}" alt="Avatar" class="avatar" />
            <div class="status-indicator ${stats.serverReachable ? 'online' : 'offline'}"></div>
          </div>
          <h2 class="student-name">${studentInfo.fullName}</h2>
          <div class="student-code">${studentInfo.studentCode}</div>
          <p class="student-email">${studentInfo.email}</p>
          <div class="divider"></div>
          <div class="profile-info-row">
            <span>Lớp</span>
            <strong id="profile-class">${classLine}</strong>
          </div>
          <div class="profile-info-row">
            <span>Điện thoại</span>
            <strong>${studentInfo.phone || 'Chưa cung cấp'}</strong>
          </div>
        </div>

        <div class="right-column">
          <div class="card status-banner ${mode.cls}">
            <div class="status-banner-icon" id="status-icon">${mode.icon}</div>
            <div class="status-banner-main">
              <div class="status-banner-top">
                <span class="monitor-mode-tag" id="monitor-mode-tag">${mode.label}</span>
                <span class="status-class-line" id="status-class-line">${classLine}</span>
              </div>
              <div class="status-banner-value" id="status-message">${stats.monitorLabel || stats.statusMsg || 'Đang kết nối...'}</div>
              <div class="status-banner-sub" id="status-sub">
                ${stats.currentPeriod > 0 && stats.currentCourseName
                  ? `Ca ${stats.currentPeriod} · ${stats.currentCourseName}`
                  : 'Theo dõi theo lịch học của lớp'}
              </div>
            </div>
          </div>

          <div class="stats-grid stats-grid--two">
            <div class="card stat-card">
              <div class="stat-icon-wrap">📡</div>
              <div class="stat-info">
                <div class="stat-title">WiFi</div>
                <div class="stat-value" id="wifi-ssid">${stats.wifiSSID || 'Đang quét...'}</div>
              </div>
            </div>
            <div class="card stat-card">
              <div class="stat-icon-wrap">🖥️</div>
              <div class="stat-info">
                <div class="stat-title">Máy chủ</div>
                <div class="stat-value" id="server-status" style="color: ${stats.serverReachable ? 'var(--online-color)' : 'var(--offline-color)'}">
                  ${stats.serverReachable ? 'Đã kết nối' : 'Mất kết nối'}
                </div>
              </div>
            </div>
          </div>

          <div class="clocks-card card">
            <div class="card-title-row">
              <div class="card-title">Hôm nay — theo ca</div>
              <div class="card-title-sub" id="session-date">${stats.sessionDate || ''}</div>
            </div>
            <div class="clock-display clock-display-summary">
              <div class="clock-item">
                <div class="clock-label">Tổng trực tuyến</div>
                <div class="clock-value online" id="clock-online">00:00:00</div>
              </div>
              <div class="clock-item">
                <div class="clock-label">Tổng ngoại tuyến</div>
                <div class="clock-value offline" id="clock-offline">00:00:00</div>
              </div>
            </div>
            <div class="shifts-wrap" id="shifts-wrap">
              ${renderShiftsTable(stats.shifts)}
            </div>
          </div>
        </div>
      </div>
    </div>
  `;

  document.getElementById('btn-logout').addEventListener('click', async () => {
    if (confirm('Bạn có chắc chắn muốn đăng xuất khỏi ứng dụng giám sát?')) {
      loggedIn = false;
      studentInfo = null;
      stopWebcam();
      await window.go.main.App.Logout();
    }
  });
}

function formatDuration(totalSeconds) {
  const hrs = Math.floor(totalSeconds / 3600);
  const mins = Math.floor((totalSeconds % 3600) / 60);
  const secs = totalSeconds % 60;
  const pad = (num) => String(num).padStart(2, '0');
  return `${pad(hrs)}:${pad(mins)}:${pad(secs)}`;
}

function startStatsTicker() {
  setInterval(async () => {
    if (!loggedIn) return;
    try {
      const freshStats = await window.go.main.App.GetStats();
      stats = { ...stats, ...freshStats };
      if (!Array.isArray(stats.shifts)) stats.shifts = [];

      const wifiEl = document.getElementById('wifi-ssid');
      if (wifiEl) wifiEl.innerText = stats.wifiSSID || 'Không có WiFi';

      const serverEl = document.getElementById('server-status');
      if (serverEl) {
        serverEl.innerText = stats.serverReachable ? 'Đã kết nối' : 'Mất kết nối';
        serverEl.style.color = stats.serverReachable ? 'var(--online-color)' : 'var(--offline-color)';
      }

      const statusMsgEl = document.getElementById('status-message');
      if (statusMsgEl) {
        statusMsgEl.innerText = stats.monitorLabel || stats.statusMsg || 'Đang kết nối...';
      }

      const mode = monitorModeMeta(stats.monitorMode);
      const statusIconEl = document.getElementById('status-icon');
      if (statusIconEl) statusIconEl.innerText = mode.icon;

      const modeTagEl = document.getElementById('monitor-mode-tag');
      if (modeTagEl) modeTagEl.innerText = mode.label;

      const banner = document.querySelector('.status-banner');
      if (banner) banner.className = `card status-banner ${mode.cls}`;

      const classLine = stats.className
        ? `${stats.className}${stats.classCode ? ` (${stats.classCode})` : ''}`
        : 'Đang xác định lớp...';
      const classLineEl = document.getElementById('status-class-line');
      if (classLineEl) classLineEl.innerText = classLine;
      const profileClassEl = document.getElementById('profile-class');
      if (profileClassEl) profileClassEl.innerText = classLine;

      const statusSubEl = document.getElementById('status-sub');
      if (statusSubEl) {
        statusSubEl.innerText = stats.currentPeriod > 0 && stats.currentCourseName
          ? `Ca ${stats.currentPeriod} · ${stats.currentCourseName}`
          : 'Theo dõi theo lịch học của lớp';
      }

      const onlineEl = document.getElementById('clock-online');
      if (onlineEl) onlineEl.innerText = formatDuration(stats.onlineSecs || 0);

      const offlineEl = document.getElementById('clock-offline');
      if (offlineEl) offlineEl.innerText = formatDuration(stats.offlineSecs || 0);

      const shiftsWrap = document.getElementById('shifts-wrap');
      if (shiftsWrap) shiftsWrap.innerHTML = renderShiftsTable(stats.shifts);

      const sessionDateEl = document.getElementById('session-date');
      if (sessionDateEl && stats.sessionDate) sessionDateEl.innerText = stats.sessionDate;

      const indicator = document.querySelector('.status-indicator');
      if (indicator) {
        indicator.className = `status-indicator ${stats.serverReachable ? 'online' : 'offline'}`;
      }
    } catch (err) {
      console.error('Error fetching stats:', err);
    }
  }, 1000);
}

async function startWebcam() {
  if (webcamStream) return;
  try {
    webcamStream = await navigator.mediaDevices.getUserMedia({
      video: { width: 320, height: 240, frameRate: { max: 10 } }
    });
    webcamVideo.srcObject = webcamStream;
    webcamInterval = setInterval(() => {
      const ctx = webcamCanvas.getContext('2d');
      if (ctx) {
        ctx.drawImage(webcamVideo, 0, 0, webcamCanvas.width, webcamCanvas.height);
        const dataUrl = webcamCanvas.toDataURL('image/jpeg', 0.4);
        window.go.main.App.SendWebcamFrame(dataUrl);
      }
    }, 250);
  } catch (err) {
    console.error('Failed to open webcam:', err);
  }
}

function stopWebcam() {
  if (webcamInterval) {
    clearInterval(webcamInterval);
    webcamInterval = null;
  }
  if (webcamStream) {
    webcamStream.getTracks().forEach(track => track.stop());
    webcamStream = null;
  }
  webcamVideo.srcObject = null;
}

init();