(function () {
  'use strict';

  async function init() {
    document.getElementById('loading').classList.remove('hidden');
    try {
      await Util.fetchCsrfToken();
      const [config] = await Promise.all([
        fetch('/api/config', { credentials: 'same-origin' }).then(r => r.json()),
        DiscordFields.fetchGuildData()
      ]);
      Fields.setSavedConfig(config);
      document.getElementById('bot-status-dot').className = 'dot online';
      document.getElementById('bot-status-text').textContent = 'Connected';
      Fields.populateFields(config);
      Notifications.initNotificationsEditor(config);
      Fields.initSmartSelects(config);
    } catch (e) {
      document.getElementById('bot-status-dot').className = 'dot offline';
      document.getElementById('bot-status-text').textContent = 'Unreachable';
    }
    document.getElementById('loading').classList.add('hidden');
    setupSectionToggles();
    Fields.setupSaveBar();
  }

  function setupSectionToggles() {
    document.querySelectorAll('.section-header').forEach(header => {
      header.addEventListener('click', () => {
        header.closest('.section').classList.toggle('collapsed');
      });
    });
  }

  function openScheduleModal() {
    const modal = document.getElementById('schedule-modal');
    modal.classList.remove('hidden');
    const dt = document.getElementById('schedule-datetime');
    const min = Util.formatLocalDateTime(new Date(Date.now() + 60000));
    dt.min = min;
    dt.value = min;
  }

  async function confirmScheduledRestart() {
    const dt = document.getElementById('schedule-datetime').value;
    if (!dt) return;
    await fetch('/api/restart', {
      method: 'POST',
      credentials: 'same-origin',
      headers: Util.csrfHeaders({ 'Content-Type': 'application/json' }),
      body: JSON.stringify({ mode: 'scheduled', scheduledFor: new Date(dt).toISOString() })
    });
    document.getElementById('schedule-modal').classList.add('hidden');
    Util.showToast(`Restart scheduled for ${new Date(dt).toLocaleString()}`, 'warning');
  }

  async function doLogout() {
    try {
      await fetch('/logout', {
        method: 'POST',
        credentials: 'same-origin',
        headers: Util.csrfHeaders()
      });
    } catch (e) { /* ignore */ }
    window.location.href = '/login';
  }

  function setupActionButtons() {
    document.getElementById('save-btn')?.addEventListener('click', () => Fields.saveConfig('save'));
    document.getElementById('save-restart-btn')?.addEventListener('click', () => Fields.saveConfig('restart'));
    document.getElementById('schedule-restart-btn')?.addEventListener('click', openScheduleModal);
    document.getElementById('schedule-confirm-btn')?.addEventListener('click', confirmScheduledRestart);
    document.getElementById('schedule-cancel-btn')?.addEventListener('click', () => {
      document.getElementById('schedule-modal').classList.add('hidden');
    });
    document.getElementById('logout-btn')?.addEventListener('click', doLogout);
  }

  function setupMobileNav() {
    const toggle = document.getElementById('menu-toggle');
    const backdrop = document.getElementById('sidebar-backdrop');

    toggle?.addEventListener('click', () => {
      Util.setSidebarOpen(!document.body.classList.contains('sidebar-open'));
    });
    backdrop?.addEventListener('click', () => Util.setSidebarOpen(false));
    document.addEventListener('keydown', (e) => {
      if (e.key === 'Escape' && document.body.classList.contains('sidebar-open')) {
        Util.setSidebarOpen(false);
      }
    });
    window.addEventListener('resize', () => {
      if (!Util.isMobileViewport() && document.body.classList.contains('sidebar-open')) {
        Util.setSidebarOpen(false);
      }
    });
  }

  let healthPollHandle = null;

  function setBotStatus(online) {
    const dot = document.getElementById('bot-status-dot');
    const text = document.getElementById('bot-status-text');
    if (!dot || !text) return;
    dot.className = online ? 'dot online' : 'dot offline';
    text.textContent = online ? 'Connected' : 'Unreachable';
  }

  async function pollHealth() {
    try {
      const res = await fetch('/healthz', { credentials: 'same-origin' });
      if (res.ok) {
        const data = await res.json();
        setBotStatus(Boolean(data.bot));
      } else {
        setBotStatus(false);
      }
    } catch (_) {
      setBotStatus(false);
    }
  }

  function scheduleNextHealthPoll() {
    if (document.hidden) return;
    healthPollHandle = setTimeout(async () => {
      await pollHealth();
      scheduleNextHealthPoll();
    }, 20000);
  }

  function startHealthPolling() {
    if (healthPollHandle) clearTimeout(healthPollHandle);
    scheduleNextHealthPoll();
  }

  function stopHealthPolling() {
    if (healthPollHandle) {
      clearTimeout(healthPollHandle);
      healthPollHandle = null;
    }
  }

  function setupHealthPolling() {
    document.addEventListener('visibilitychange', () => {
      if (document.hidden) stopHealthPolling();
      else startHealthPolling();
    });
    window.addEventListener('pagehide', stopHealthPolling);
    startHealthPolling();
  }

  document.addEventListener('DOMContentLoaded', async () => {
    Router.setupSidebarRouting();
    setupActionButtons();
    setupMobileNav();
    await init();
    Router.navigate(location.pathname, false);
    setupHealthPolling();
  });

  window.App = { init };
})();