'use strict';

(function () {
  const views = {
    crawl: document.getElementById('viewCrawl'),
    gen: document.getElementById('viewGen'),
    history: document.getElementById('viewHistory'),
    settings: document.getElementById('viewSettings'),
  };
  const navItems = document.querySelectorAll('.nav-item[data-view]');
  let settingsLoaded = false;
  let logTimer = null;
  let lastLogSignature = '';

  function showSettingsStatus(message, type = 'info') {
    const status = document.getElementById('settingsStatus');
    status.textContent = message;
    status.className = `badge ${type === 'success' ? 'badge-ok' : type === 'error' ? 'badge-fail' : 'badge-info'}`;
  }

  async function loadModels(selectedModel) {
    const select = document.getElementById('settingsModel');
    const response = await fetch('/api/models');
    if (!response.ok) throw new Error('模型列表加载失败');
    const data = await response.json();
    select.innerHTML = '';
    for (const model of data.models || []) {
      const option = document.createElement('option');
      option.value = typeof model === 'string' ? model : model.id;
      option.textContent = typeof model === 'string' ? model : (model.label || model.name || model.id);
      option.selected = option.value === selectedModel;
      select.appendChild(option);
    }
  }

  async function loadSettings() {
    showSettingsStatus('加载中…');
    const response = await fetch('/api/settings');
    if (!response.ok) throw new Error('设置加载失败');
    const settings = await response.json();
    document.getElementById('settingsApiKey').value = settings.apiKey || '';
    document.getElementById('settingsApiBase').value = settings.apiBase || '';
    document.getElementById('settingsRootDir').value = settings.rootDir || '';
    document.getElementById('pageSizeInput').value = settings.pageSize || 50;
    document.getElementById('delayInput').value = settings.delayMs ?? 300;
    document.getElementById('settingsCookie').value = settings.cookie || '';
    await loadModels(settings.model);
    showSettingsStatus('已同步');
  }

  async function saveSettings() {
    const button = document.getElementById('btnSaveSettings');
    button.disabled = true;
    showSettingsStatus('保存中…');
    try {
      const response = await fetch('/api/settings', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          apiKey: document.getElementById('settingsApiKey').value.trim(),
          model: document.getElementById('settingsModel').value,
          rootDir: document.getElementById('settingsRootDir').value.trim(),
          pageSize: Number(document.getElementById('pageSizeInput').value),
          delayMs: Number(document.getElementById('delayInput').value),
          cookie: document.getElementById('settingsCookie').value.trim(),
        }),
      });
      const data = await response.json();
      if (!response.ok) throw new Error(data.error || `HTTP ${response.status}`);
      await loadSettings();
      showSettingsStatus('已保存', 'success');
    } catch (error) {
      showSettingsStatus(error.message, 'error');
    } finally {
      button.disabled = false;
    }
  }

  async function initSettings() {
    if (settingsLoaded) return;
    document.getElementById('btnSaveSettings').addEventListener('click', saveSettings);
    document.getElementById('btnClearLog').addEventListener('click', () => {
      clearLogs().catch(() => {});
    });
    try {
      await loadSettings();
      settingsLoaded = true;
    } catch (error) {
      showSettingsStatus(error.message, 'error');
    }
  }

  function escapeLogText(value) {
    const div = document.createElement('div');
    div.textContent = String(value ?? '');
    return div.innerHTML;
  }

  function renderLogs(logs) {
    const panel = document.getElementById('logPanel');
    if (!panel) return;
    const sourceMap = { task: '任务', system: '系统' };
    const levelMap = { info: 'INFO', success: 'OK', warn: 'WARN', error: 'FAIL' };
    panel.innerHTML = logs.map((log) => {
      const level = levelMap[log.level] || 'INFO';
      const levelClass = log.level === 'success' ? 'ok' : log.level || 'info';
      return `
        <div class="log-line">
          <span class="log-ts">${escapeLogText(log.time)}</span>
          <span class="log-source ${log.source === 'system' ? 'system' : 'task'}">${sourceMap[log.source] || log.source}</span>
          <span class="log-lvl ${levelClass}">${level}</span>
          <span class="log-msg">${escapeLogText(log.message)}</span>
        </div>`;
    }).join('');
  }

  async function refreshLogs() {
    const response = await fetch('/api/logs');
    if (!response.ok) return;
    const data = await response.json();
    const logs = (data.logs || []).sort((a, b) => b.seq - a.seq);
    const signature = logs.map((log) => `${log.seq}:${log.level}:${log.message}`).join('|');
    if (signature === lastLogSignature) return;
    lastLogSignature = signature;
    renderLogs(logs);
  }

  function startLogPolling() {
    if (logTimer) return;
    refreshLogs();
    logTimer = setInterval(refreshLogs, 1500);
  }

  async function clearLogs() {
    await fetch('/api/logs/clear', { method: 'POST' });
    lastLogSignature = '';
    await refreshLogs();
  }

  function switchView(name) {
    for (const [key, el] of Object.entries(views)) {
      el.classList.toggle('active', key === name);
    }
    navItems.forEach((n) => n.classList.toggle('active', n.dataset.view === name));
    if (name === 'crawl' && window.shanCrawlInit) window.shanCrawlInit();
    if (name === 'gen' && window.shanGenInit) window.shanGenInit();
    if (name === 'history' && window.shanHistoryInit) window.shanHistoryInit();
    if (name === 'settings') initSettings();
  }

  navItems.forEach((n) => n.addEventListener('click', () => switchView(n.dataset.view)));

  switchView('crawl');
  startLogPolling();

  const splash = document.getElementById('splash');
  if (splash) {
    setTimeout(() => splash.classList.add('hide'), 1800);
    setTimeout(() => splash.remove(), 2400);
  }
})();