/**
 * LocalTools - Main Application
 * Handles navigation, theme, and global features
 */

document.addEventListener('DOMContentLoaded', () => {
  initTheme();
  initNavigation();
  initMobileMenu();
  initSetupNotice();
  initPdfEditor();
  initImageScraper();
  initGlobalShortcuts();
  initPdfTools();
  initImageTools();
});

/**
 * Theme Management
 */
function initTheme() {
  const themeToggle = document.getElementById('themeToggle');
  const savedTheme = localStorage.getItem('theme') || 'light';
  
  document.documentElement.setAttribute('data-theme', savedTheme);
  
  themeToggle.addEventListener('click', () => {
    const currentTheme = document.documentElement.getAttribute('data-theme');
    const newTheme = currentTheme === 'dark' ? 'light' : 'dark';
    
    document.documentElement.setAttribute('data-theme', newTheme);
    localStorage.setItem('theme', newTheme);
    
    showToast(
      newTheme === 'dark' ? 'Dark Mode' : 'Light Mode',
      'Theme updated',
      'success',
      2000
    );
  });
}

/**
 * Setup Notice
 */
function initSetupNotice() {
  const notice = document.getElementById('setupNotice');
  const closeBtn = document.getElementById('closeSetupNotice');
  
  // Check if dismissed
  if (localStorage.getItem('setupNoticeDismissed')) {
    notice.classList.add('hidden');
  }
  
  // Close button
  closeBtn.addEventListener('click', () => {
    notice.classList.add('hidden');
    localStorage.setItem('setupNoticeDismissed', 'true');
  });
  
  // Copy buttons
  document.querySelectorAll('.copy-btn').forEach(btn => {
    btn.addEventListener('click', async () => {
      const text = btn.dataset.copy;
      
      try {
        await navigator.clipboard.writeText(text);
        btn.classList.add('copied');
        showToast('Copied!', text, 'success', 2000);
        
        setTimeout(() => {
          btn.classList.remove('copied');
        }, 2000);
      } catch (err) {
        showToast('Copy failed', 'Please copy manually', 'error');
      }
    });
  });
}

/**
 * Sidebar Navigation
 */
function initNavigation() {
  const navItems = document.querySelectorAll('.nav-item[data-page]');
  const pages = document.querySelectorAll('.page');

  navItems.forEach(item => {
    item.addEventListener('click', () => {
      const targetPage = item.dataset.page;
      switchToPage(targetPage);
      
      // Close mobile menu
      closeMobileMenu();
    });
  });
}

function switchToPage(pageName) {
  const navItems = document.querySelectorAll('.nav-item[data-page]');
  const pages = document.querySelectorAll('.page');
  
  navItems.forEach(item => {
    item.classList.toggle('active', item.dataset.page === pageName);
  });
  
  pages.forEach(page => {
    page.classList.toggle('active', page.id === `page-${pageName}`);
  });
}

/**
 * Mobile Menu
 */
function initMobileMenu() {
  const menuBtn = document.getElementById('mobileMenuBtn');
  const sidebar = document.getElementById('sidebar');
  const overlay = document.getElementById('sidebarOverlay');
  
  menuBtn.addEventListener('click', () => {
    sidebar.classList.toggle('open');
    overlay.classList.toggle('active');
  });
  
  overlay.addEventListener('click', closeMobileMenu);
}

function closeMobileMenu() {
  const sidebar = document.getElementById('sidebar');
  const overlay = document.getElementById('sidebarOverlay');
  sidebar.classList.remove('open');
  overlay.classList.remove('active');
}

/**
 * Global Keyboard Shortcuts
 */
function initGlobalShortcuts() {
  registerShortcut('1', () => switchToPage('pdf'), 'PDF Editor');
  registerShortcut('2', () => switchToPage('watermark'), 'Watermark Remover');
  registerShortcut('3', () => switchToPage('img2pdf'), 'Images to PDF');
  registerShortcut('4', () => switchToPage('merge'), 'Merge PDFs');
  registerShortcut('5', () => switchToPage('split'), 'Split PDF');
  registerShortcut('6', () => switchToPage('images'), 'Image Scraper');
  
  registerShortcut('ctrl+k', () => {
    document.getElementById('themeToggle').click();
  }, 'Toggle Theme');
  
  registerShortcut('?', () => {
    showKeyboardShortcutsModal();
  }, 'Show Shortcuts');
  
  // Nav button handlers
  document.getElementById('navRecentFiles').addEventListener('click', showRecentFilesModal);
  document.getElementById('navKeyboardShortcuts').addEventListener('click', showKeyboardShortcutsModal);
  
  // Initialize watermark removal page
  initWatermarkRemoval();
}

/**
 * Recent Files Modal
 */
function showRecentFilesModal() {
  const recentFiles = JSON.parse(localStorage.getItem('recentFiles') || '[]');
  
  let content = '';
  if (recentFiles.length === 0) {
    content = `
      <div class="empty-state" style="padding: 40px 20px;">
        <div class="empty-state-illustration" style="width: 80px; height: 80px;">
          <svg width="32" height="32" fill="none" stroke="currentColor" viewBox="0 0 24 24">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"/>
          </svg>
        </div>
        <div class="empty-state-title" style="font-size: 16px;">No Recent Files</div>
        <div class="empty-state-message" style="font-size: 13px;">Files you work with will appear here</div>
      </div>
    `;
  } else {
    content = `
      <div style="padding: 16px;">
        <div style="font-size: 14px; font-weight: 600; margin-bottom: 12px; color: var(--text);">Recent Files</div>
        <div style="display: flex; flex-direction: column; gap: 8px;">
          ${recentFiles.map(file => `
            <div style="display: flex; align-items: center; gap: 12px; padding: 12px; background: var(--border-light); border-radius: 8px;">
              <svg width="20" height="20" fill="none" stroke="var(--primary)" viewBox="0 0 24 24">
                <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/>
              </svg>
              <div style="flex: 1; min-width: 0;">
                <div style="font-size: 13px; font-weight: 500; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;">${file.name}</div>
                <div style="font-size: 11px; color: var(--text-muted);">${file.date}</div>
              </div>
            </div>
          `).join('')}
        </div>
        <button class="btn btn-secondary" style="width: 100%; margin-top: 12px;" onclick="clearRecentFiles()">Clear History</button>
      </div>
    `;
  }
  
  showModal('Recent Files', content);
}

function addToRecentFiles(name, type) {
  const recentFiles = JSON.parse(localStorage.getItem('recentFiles') || '[]');
  const newFile = {
    name: name,
    type: type,
    date: new Date().toLocaleDateString()
  };
  
  // Remove duplicate if exists
  const filtered = recentFiles.filter(f => f.name !== name);
  filtered.unshift(newFile);
  
  // Keep only last 10
  localStorage.setItem('recentFiles', JSON.stringify(filtered.slice(0, 10)));
}

function clearRecentFiles() {
  localStorage.removeItem('recentFiles');
  closeModal();
  showToast('Cleared', 'Recent files history cleared', 'success', 2000);
}

/**
 * Keyboard Shortcuts Modal
 */
function showKeyboardShortcutsModal() {
  const shortcuts = [
    { key: '1', desc: 'PDF Editor' },
    { key: '2', desc: 'Watermark Remover' },
    { key: '3', desc: 'Images to PDF' },
    { key: '4', desc: 'Merge PDFs' },
    { key: '5', desc: 'Split PDF' },
    { key: '6', desc: 'Image Scraper' },
    { key: 'Ctrl + K', desc: 'Toggle theme' },
    { key: '?', desc: 'Show this help' },
  ];
  
  const content = `
    <div style="padding: 16px;">
      <div style="display: flex; flex-direction: column; gap: 8px;">
        ${shortcuts.map(s => `
          <div style="display: flex; align-items: center; justify-content: space-between; padding: 10px 12px; background: var(--border-light); border-radius: 8px;">
            <span style="font-size: 13px; color: var(--text-secondary);">${s.desc}</span>
            <kbd class="kbd" style="margin-left: 0;">${s.key}</kbd>
          </div>
        `).join('')}
      </div>
    </div>
  `;
  
  showModal('Keyboard Shortcuts', content);
}

/**
 * Generic Modal
 */
function showModal(title, content) {
  // Remove existing modal if any
  closeModal();
  
  const modal = document.createElement('div');
  modal.className = 'modal-overlay active';
  modal.id = 'genericModal';
  modal.innerHTML = `
    <div class="modal-content" style="max-width: 400px; width: 100%;">
      <button class="modal-close" onclick="closeModal()">
        <svg width="20" height="20" fill="none" stroke="currentColor" viewBox="0 0 24 24">
          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12"/>
        </svg>
      </button>
      <div style="padding: 20px 24px; border-bottom: 1px solid var(--border);">
        <h3 style="font-size: 16px; font-weight: 600; color: var(--text);">${title}</h3>
      </div>
      ${content}
    </div>
  `;
  
  modal.addEventListener('click', (e) => {
    if (e.target === modal) closeModal();
  });
  
  document.body.appendChild(modal);
}

function closeModal() {
  const modal = document.getElementById('genericModal');
  if (modal) modal.remove();
}

// Close modal on Escape
document.addEventListener('keydown', (e) => {
  if (e.key === 'Escape') closeModal();
});