// EShip Extension Popup Logic

// DOM Elements
const loadingEl = document.getElementById('loading');
const loginFormEl = document.getElementById('login-form');
const toolsMenuEl = document.getElementById('tools-menu');
const authForm = document.getElementById('auth-form');
const emailInput = document.getElementById('email');
const passwordInput = document.getElementById('password');
const errorMessage = document.getElementById('error-message');
const loginBtn = document.getElementById('login-btn');
const logoutBtn = document.getElementById('logout-btn');
const userEmailEl = document.getElementById('user-email');
const toolsListEl = document.getElementById('tools-list');
const openSiteBtn = document.getElementById('open-site-btn');

// Protected site URL (should match config.js)
const PROTECTED_SITE_URL = 'http://localhost:5173';

// State
let currentUser = null;
let tools = [];

// Initialize popup
document.addEventListener('DOMContentLoaded', init);

async function init() {
  showState('loading');
  
  try {
    // Check if service worker is available
    if (!chrome.runtime || !chrome.runtime.id) {
      throw new Error('Chrome Runtime nicht verfuegbar');
    }
    
    // First, test if service worker is alive
    console.log('Testing service worker...');
    const pingResponse = await sendMessage({ action: 'PING' });
    console.log('PING response:', pingResponse);
    
    if (!pingResponse) {
      throw new Error('Service Worker antwortet nicht. Bitte Extension in chrome://extensions neu laden und Service Worker Konsole pruefen.');
    }
    
    if (!pingResponse.success) {
      throw new Error('Service Worker Fehler: ' + (pingResponse.error || 'Unbekannter Fehler'));
    }
    
    console.log('Service Worker ist aktiv!');
    
    console.log('Checking auth status...');
    
    // Check current auth status
    const response = await sendMessage({ action: 'CHECK_AUTH' });
    
    if (!response) {
      throw new Error('Keine Antwort vom Service Worker');
    }
    
    console.log('Auth response:', response);
    
    // If there's an error, show it but still allow login
    if (response.error && !response.success) {
      console.error('Service Worker Error:', response.error);
      showError('Hinweis: ' + response.error + ' - Login sollte trotzdem funktionieren.');
    }
    
    if (response.success && response.authenticated) {
      currentUser = response.user;
      await loadTools();
      showLoggedInState();
    } else {
      // Not authenticated - show login form
      showState('login-form');
    }
  } catch (error) {
    console.error('Init error:', error);
    showError('Fehler beim Laden: ' + error.message + '. Bitte Extension in chrome://extensions neu laden.');
    showState('login-form');
  }
}

// Show a specific state (loading, login-form, tools-menu)
function showState(stateId) {
  loadingEl.classList.add('hidden');
  loginFormEl.classList.add('hidden');
  toolsMenuEl.classList.add('hidden');
  
  document.getElementById(stateId).classList.remove('hidden');
}

// Show logged in state with user info
function showLoggedInState() {
  userEmailEl.textContent = currentUser.email || currentUser.name || 'Benutzer';
  renderTools();
  showState('tools-menu');
}

// Send message to service worker
function sendMessage(message) {
  return new Promise((resolve) => {
    // Add timeout to prevent hanging
    const timeout = setTimeout(() => {
      console.error('Message timeout:', message.action);
      resolve({ 
        success: false, 
        error: 'Service Worker antwortet nicht. Bitte Extension in chrome://extensions neu laden und Service Worker Konsole pruefen.' 
      });
    }, 2000); // Reduced timeout to 2 seconds for faster feedback
    
    try {
      if (!chrome.runtime || !chrome.runtime.id) {
        clearTimeout(timeout);
        resolve({ success: false, error: 'Chrome Runtime nicht verfuegbar' });
        return;
      }
      
      chrome.runtime.sendMessage(message, (response) => {
        clearTimeout(timeout);
        if (chrome.runtime.lastError) {
          console.error('Chrome runtime error:', chrome.runtime.lastError);
          resolve({ 
            success: false, 
            error: chrome.runtime.lastError.message || 'Service Worker Fehler' 
          });
        } else {
          console.log('Response received:', response);
          resolve(response || { success: false, error: 'Keine Antwort vom Service Worker' });
        }
      });
    } catch (error) {
      clearTimeout(timeout);
      console.error('Send message error:', error);
      resolve({ success: false, error: error.message || 'Fehler beim Senden der Nachricht' });
    }
  });
}

// Login form submission
authForm.addEventListener('submit', async (e) => {
  e.preventDefault();
  
  const email = emailInput.value.trim();
  const password = passwordInput.value;
  
  if (!email || !password) {
    showError('Bitte E-Mail und Passwort eingeben');
    return;
  }
  
  setLoginLoading(true);
  hideError();
  
  const response = await sendMessage({
    action: 'LOGIN',
    email,
    password
  });
  
  setLoginLoading(false);
  
  if (response.success) {
    currentUser = response.user;
    await loadTools();
    showLoggedInState();
    
    // Open protected site after successful login
    openProtectedSite();
  } else {
    showError(response.error || 'Anmeldung fehlgeschlagen');
  }
});

// Logout button
logoutBtn.addEventListener('click', async () => {
  const response = await sendMessage({ action: 'LOGOUT' });
  
  if (response.success) {
    currentUser = null;
    tools = [];
    emailInput.value = '';
    passwordInput.value = '';
    showState('login-form');
  }
});

// Open site button
openSiteBtn.addEventListener('click', () => {
  openProtectedSite();
});

// Open protected site in new tab
function openProtectedSite() {
  chrome.tabs.create({ url: PROTECTED_SITE_URL });
}

// Load tools settings
async function loadTools() {
  const response = await sendMessage({ action: 'GET_SETTINGS' });
  if (response.success) {
    tools = response.tools;
  }
}

// Render tools list
function renderTools() {
  toolsListEl.innerHTML = '';
  
  tools.forEach((tool, index) => {
    const toolEl = document.createElement('div');
    toolEl.className = 'tool-item';
    toolEl.innerHTML = `
      <div class="tool-header">
        <span class="tool-name">${escapeHtml(tool.name)}</span>
        <label class="toggle">
          <input type="checkbox" data-tool-id="${tool.id}" ${tool.enabled ? 'checked' : ''}>
          <span class="toggle-slider"></span>
        </label>
      </div>
      <div class="tool-settings ${tool.enabled ? 'visible' : ''}" id="settings-${tool.id}">
        ${renderToolSettings(tool)}
      </div>
    `;
    toolsListEl.appendChild(toolEl);
    
    // Toggle event listener
    const toggle = toolEl.querySelector('input[type="checkbox"]');
    toggle.addEventListener('change', (e) => {
      handleToolToggle(tool.id, e.target.checked);
    });
    
    // Settings change listeners
    const settingsInputs = toolEl.querySelectorAll('.setting-row input');
    settingsInputs.forEach(input => {
      input.addEventListener('change', (e) => {
        handleSettingChange(tool.id, e.target.dataset.setting, e.target.value);
      });
    });
  });
}

// Render settings inputs for a tool
function renderToolSettings(tool) {
  if (!tool.settings) return '';
  
  let html = '';
  for (const [key, value] of Object.entries(tool.settings)) {
    html += `
      <div class="setting-row">
        <label>${escapeHtml(formatSettingName(key))}</label>
        <input type="text" data-setting="${key}" value="${escapeHtml(value)}">
      </div>
    `;
  }
  return html;
}

// Format setting key to readable name
function formatSettingName(key) {
  return key
    .replace(/([A-Z])/g, ' $1')
    .replace(/^./, str => str.toUpperCase())
    .replace(/_/g, ' ');
}

// Handle tool toggle
async function handleToolToggle(toolId, enabled) {
  const tool = tools.find(t => t.id === toolId);
  if (tool) {
    tool.enabled = enabled;
    
    // Show/hide settings
    const settingsEl = document.getElementById(`settings-${toolId}`);
    if (settingsEl) {
      settingsEl.classList.toggle('visible', enabled);
    }
    
    await saveTools();
  }
}

// Handle setting value change
async function handleSettingChange(toolId, settingKey, value) {
  const tool = tools.find(t => t.id === toolId);
  if (tool && tool.settings) {
    tool.settings[settingKey] = value;
    await saveTools();
  }
}

// Save tools to storage
async function saveTools() {
  await sendMessage({ action: 'SAVE_SETTINGS', settings: tools });
}

// Show error message
function showError(message) {
  errorMessage.textContent = message;
  errorMessage.classList.remove('hidden');
}

// Hide error message
function hideError() {
  errorMessage.classList.add('hidden');
}

// Set login button loading state
function setLoginLoading(loading) {
  loginBtn.disabled = loading;
  loginBtn.querySelector('.btn-text').classList.toggle('hidden', loading);
  loginBtn.querySelector('.btn-spinner').classList.toggle('hidden', !loading);
}

// Escape HTML to prevent XSS
function escapeHtml(text) {
  const div = document.createElement('div');
  div.textContent = text;
  return div.innerHTML;
}