// Try to get ipcRenderer, but don't fail if it's not available
let ipcRenderer = null;
try {
  if (typeof require !== 'undefined') {
    const electron = require('electron');
    ipcRenderer = electron.ipcRenderer;
  }
} catch (e) {
  console.log('[SETTINGS] Electron IPC not available, some features may be limited');
}

let clearBtn = document.getElementById('clear-data-btn');
const statusDiv = document.getElementById('status');
const statusText = document.getElementById('status-text');
const TAB_STORAGE_KEY = 'nebula-settings-active-tab';

function showStatus(message) {
  if (statusText && statusDiv) {
    statusText.textContent = message;
    statusDiv.classList.remove('hidden');
    setTimeout(() => {
      statusDiv.classList.add('hidden');
    }, 2000);
  } else {
    console.log('[STATUS]', message);
  }
}

function showStatus(message) {
  statusText.textContent = message;
  statusDiv.classList.remove('hidden'); // Ensure the hidden class is removed
  setTimeout(() => {
    statusDiv.classList.add('hidden'); // Add the hidden class back after 2 seconds
  }, 2000);
}

function attachClearHandler(btn) {
  if (!btn) return;
  btn.onclick = async () => {
    if (statusDiv && statusText) {
      statusDiv.classList.remove('hidden');
      statusText.textContent = 'Clearing all browser data...';
    }

    try {
      if (ipcRenderer) {
        const ok = await ipcRenderer.invoke('clear-browser-data');
        showStatus(ok
          ? 'All browser data and bookmarks cleared!'
          : 'Failed to clear browser data.');
      } else {
        showStatus('Clear data feature not available in this context.');
      }
    } catch (error) {
      console.error('Error clearing browser data:', error);
      showStatus('An error occurred while clearing data.');
    } finally {
      const currentTheme = window.browserCustomizer ? window.browserCustomizer.currentTheme : null;
      if (currentTheme && window.electronAPI && typeof window.electronAPI.sendToHost === 'function') {
        window.electronAPI.sendToHost('theme-update', currentTheme);
      }
    }
  };
}

// Try attaching immediately, and again on DOMContentLoaded
attachClearHandler(clearBtn);
window.addEventListener('DOMContentLoaded', () => {
  if (!clearBtn) {
    clearBtn = document.getElementById('clear-data-btn');
    attachClearHandler(clearBtn);
  }
});

// Tabs: simple controller
function activateTab(tabName) {
  const links = document.querySelectorAll('.tab-link');
  const panels = document.querySelectorAll('.tab-panel');
  
  links.forEach(l => {
    const isActive = l.dataset.tab === tabName;
    l.classList.toggle('active', isActive);
    l.setAttribute('aria-selected', isActive ? 'true' : 'false');
    if (isActive) l.focus({ preventScroll: true });
  });
  panels.forEach(p => {
    const isActive = p.id === `panel-${tabName}`;
    p.classList.toggle('active', isActive);
    p.hidden = !isActive;
  // noop
  });
  try { localStorage.setItem(TAB_STORAGE_KEY, tabName); } catch {}
}

function initTabs() {
  const links = document.querySelectorAll('.tab-link');
  
  // Direct listeners (for accessibility focus handling)
  links.forEach((link, index) => {
    link.addEventListener('click', (e) => {
      e.preventDefault();
      e.stopPropagation();
      const name = link.dataset.tab;
      if (!name) return;
      if (location.hash !== `#${name}`) {
        history.replaceState(null, '', `#${name}`);
      }
      activateTab(name);
    });
  });
  
  // Delegation as a fallback if elements are re-rendered
  const tabContainer = document.querySelector('.tabs');
  if (tabContainer) {
    tabContainer.addEventListener('click', (e) => {
      const btn = e.target && e.target.closest ? e.target.closest('.tab-link') : null;
      if (!btn || !tabContainer.contains(btn)) return;
      const name = btn.dataset.tab;
      if (!name) return;
      if (location.hash !== `#${name}`) {
        history.replaceState(null, '', `#${name}`);
      }
      activateTab(name);
    });
  }

  // Resolve initial tab: hash > storage > default 'general'
  let initial = (location.hash || '').replace('#', '') || null;
  if (!initial) {
    try { initial = localStorage.getItem(TAB_STORAGE_KEY) || null; } catch {}
  }
  if (!initial) initial = 'general';
  activateTab(initial);
}

// Initialize tabs after DOM is ready but before customization init uses the DOM
window.addEventListener('DOMContentLoaded', () => {
  initTabs();
});

// About tab population
async function populateAbout() {
  try {
    const info = (window.aboutAPI && typeof window.aboutAPI.getInfo === 'function')
      ? await window.aboutAPI.getInfo()
      : null;
    if (!info || info.error) {
      console.warn('[ABOUT] Unable to load about info', info && info.error);
      return;
    }
    const byId = (id) => document.getElementById(id);
    byId('about-app-name').textContent = info.appName;
    byId('about-app-version').textContent = info.appVersion;
    byId('about-packaged').textContent = info.isPackaged ? 'Yes' : 'No';
    byId('about-userdata').textContent = info.userDataPath;

    byId('about-electron').textContent = info.electronVersion;
    byId('about-chrome').textContent = info.chromeVersion;
    byId('about-node').textContent = info.nodeVersion;
    byId('about-v8').textContent = info.v8Version;

    byId('about-os').textContent = `${info.osType} ${info.osRelease}`;
    byId('about-cpu').textContent = info.cpu;
    byId('about-arch').textContent = info.arch;
    byId('about-mem').textContent = `${info.totalMemGB} GB`;

    const copyBtn = document.getElementById('copy-about-btn');
    if (copyBtn) {
      copyBtn.addEventListener('click', async () => {
        const payload = [
          `Nebula ${info.appVersion} (${info.isPackaged ? 'packaged' : 'dev'})`,
          `Electron ${info.electronVersion} | Chromium ${info.chromeVersion} | Node ${info.nodeVersion} | V8 ${info.v8Version}`,
          `${info.osType} ${info.osRelease} ${info.arch}`,
          `CPU: ${info.cpu}`,
          `RAM: ${info.totalMemGB} GB`,
          `UserData: ${info.userDataPath}`
        ].join('\n');
        try {
          await navigator.clipboard.writeText(payload);
          showStatus('Diagnostics copied');
        } catch (err) {
          console.error('Clipboard error:', err);
          showStatus('Failed to copy diagnostics');
        }
      });
    }
  } catch (err) {
    console.error('[ABOUT] Error populating about info:', err);
  }
}

// Populate about info after DOM is ready
window.addEventListener('DOMContentLoaded', () => {
  populateAbout();
});

// Keep settings open when clicking GitHub by asking host to open externally/new tab
window.addEventListener('DOMContentLoaded', () => {
  const gh = document.getElementById('github-link');
  if (gh) {
    gh.addEventListener('click', (e) => {
      try {
        e.preventDefault();
        const url = gh.getAttribute('href');
        if (window.electronAPI && typeof window.electronAPI.sendToHost === 'function') {
          window.electronAPI.sendToHost('navigate', url, { newTab: true });
        } else if (window.parent) {
          window.parent.postMessage({ type: 'navigate', url, newTab: true }, '*');
        } else {
          window.open(url, '_blank', 'noopener');
        }
      } catch (err) {
        console.error('Failed to open GitHub link:', err);
        window.open(gh.getAttribute('href'), '_blank');
      }
    });
  }
  const help = document.getElementById('help-link');
  if (help) {
    help.addEventListener('click', (e) => {
      try {
        e.preventDefault();
        const url = help.getAttribute('href');
        if (window.electronAPI && typeof window.electronAPI.sendToHost === 'function') {
          window.electronAPI.sendToHost('navigate', url, { newTab: true });
        } else if (window.parent) {
          window.parent.postMessage({ type: 'navigate', url, newTab: true }, '*');
        } else {
          window.open(url, '_blank', 'noopener');
        }
      } catch (err) {
        console.error('Failed to open Help link:', err);
        window.open(help.getAttribute('href'), '_blank');
      }
    });
  }
});