'use strict';

// 局域网访问口令：服务端开启 accessToken 时，API 返回 401 会引导输入一次口令，
// 写入 cookie 后所有请求（fetch / 图片 / CSV 链接）自动携带，无需逐处改代码。
(function () {
  let tokenAsked = false;
  const origFetch = window.fetch.bind(window);
  window.fetch = async function (input, init) {
    const res = await origFetch(input, init);
    const url = typeof input === 'string' ? input : (input && input.url) || String(input || '');
    if (res.status === 401 && /\/(api|files)\b/.test(url) && !tokenAsked) {
      tokenAsked = true;
      const token = window.prompt('此服务已开启访问口令（accessToken），请输入：');
      if (token) {
        document.cookie = 'accessToken=' + encodeURIComponent(token) + '; path=/; max-age=31536000; SameSite=Lax';
        tokenAsked = false;
        return origFetch(input, init);
      }
    }
    return res;
  };
})();

(function () {
  const views = {
    crawl: document.getElementById('viewCrawl'),
    gen: document.getElementById('viewGen'),
    tasks: document.getElementById('viewTasks'),
    history: document.getElementById('viewHistory'),
    reports: document.getElementById('viewReports'),
    analysis: document.getElementById('viewAnalysis'),
    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;
    const cookieInput = document.getElementById('settingsCookie');
    cookieInput.value = '';
    cookieInput.placeholder = settings.cookieConfigured
      ? '已配置，输入新 Cookie 可更换'
      : '登录 melody.shop.ele.me 后从 DevTools 复制';
    document.getElementById('settingsChatModel').value = settings.chatModel || 'deepseek-v4.1-flash';
    document.getElementById('settingsChatApiBase').value = settings.chatApiBase || '';
    const chatKeyInput = document.getElementById('settingsChatApiKey');
    chatKeyInput.value = settings.chatApiKey || '';
    chatKeyInput.placeholder = settings.chatKeyFallback
      ? '留空复用上方 API Key'
      : (settings.chatApiKey ? '已配置，输入新 Key 可更换' : '留空复用上方 API Key；否则填对话模型专用 Key');
    const tokenInput = document.getElementById('settingsAccessToken');
    tokenInput.value = '';
    tokenInput.placeholder = settings.accessTokenSet ? '已设置，留空保持不变（输入 - 清除）' : '未设置';
    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),
          chatModel: document.getElementById('settingsChatModel').value.trim(),
          ...(document.getElementById('settingsChatApiKey').value.trim() && !document.getElementById('settingsChatApiKey').value.includes('••••')
            ? { chatApiKey: document.getElementById('settingsChatApiKey').value.trim() }
            : {}),
          ...(document.getElementById('settingsCookie').value.trim()
            ? { cookie: document.getElementById('settingsCookie').value.trim() }
            : {}),
          ...(document.getElementById('settingsAccessToken').value.trim()
            ? { accessToken: document.getElementById('settingsAccessToken').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 testImageApi() {
    const status = document.getElementById('imageTestStatus');
    const button = document.getElementById('btnTestImage');
    button.disabled = true;
    status.textContent = '测试中…';
    status.className = 'badge badge-info';
    try {
      const response = await fetch('/api/image/test', { method: 'POST' });
      const data = await response.json();
      if (!response.ok) throw new Error(data.error || `HTTP ${response.status}`);
      if (data.statusCode === 0) throw new Error(data.error || '网络不可达');
      const model = data.model || '';
      if (data.statusCode === 200 && data.modelFound) {
        status.textContent = '连通正常，模型在列表中';
        status.className = 'badge badge-ok';
      } else if (data.statusCode === 200 && Array.isArray(data.models)) {
        status.textContent = `服务可达（${data.models.length} 个模型）；列表中未找到 ${model}`;
        status.className = 'badge badge-warn';
      } else if (data.statusCode === 200) {
        status.textContent = '服务可达；该网关不提供模型列表，无法校验模型名';
        status.className = 'badge badge-warn';
      } else if (data.statusCode === 401 || data.statusCode === 403) {
        status.textContent = `服务返回 ${data.statusCode}：Key 可能无效`;
        status.className = 'badge badge-fail';
      } else {
        status.textContent = `服务返回 ${data.statusCode}`;
        status.className = 'badge badge-fail';
      }
    } catch (error) {
      status.textContent = '失败：' + error.message;
      status.className = 'badge badge-fail';
    } finally {
      button.disabled = false;
    }
  }

  async function testChatModel() {
    const status = document.getElementById('chatTestStatus');
    const button = document.getElementById('btnTestChat');
    button.disabled = true;
    status.textContent = '测试中…';
    status.className = 'badge badge-info';
    try {
      const response = await fetch('/api/chat/test', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          chatModel: document.getElementById('settingsChatModel').value.trim(),
          chatApiKey: document.getElementById('settingsChatApiKey').value.trim(),
        }),
      });
      const data = await response.json();
      if (!response.ok) throw new Error(data.error || `HTTP ${response.status}`);
      status.textContent = `连通正常：${data.reply || 'OK'}`;
      status.className = 'badge badge-ok';
    } catch (error) {
      status.textContent = '失败：' + error.message;
      status.className = 'badge badge-fail';
    } finally {
      button.disabled = false;
    }
  }

  function bindSettingsTabs() {
    const tabs = document.getElementById('settingsApiTabs');
    if (!tabs) return;
    tabs.addEventListener('click', (event) => {
      const btn = event.target.closest('button[data-tab]');
      if (!btn || btn.classList.contains('active')) return;
      tabs.querySelectorAll('button').forEach((b) => b.classList.toggle('active', b === btn));
      document.getElementById('settingsTabImage').hidden = btn.dataset.tab !== 'image';
      document.getElementById('settingsTabChat').hidden = btn.dataset.tab !== 'chat';
    });
  }

  async function initSettings() {
    if (settingsLoaded) return;
    bindSettingsTabs();
    if (new URLSearchParams(location.search).get('tab') === 'chat') {
      document.querySelector('#settingsApiTabs button[data-tab="chat"]')?.click();
    }
    document.getElementById('btnSaveSettings').addEventListener('click', saveSettings);
    document.getElementById('btnTestImage').addEventListener('click', testImageApi);
    document.getElementById('btnTestChat').addEventListener('click', testChatModel);
    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 === 'tasks' && window.shanTasksInit) window.shanTasksInit();
    if (name === 'history' && window.shanHistoryInit) window.shanHistoryInit();
    if (name === 'reports' && window.shanReportsInit) window.shanReportsInit();
    if (name === 'analysis' && window.shanAnalysisActivate) window.shanAnalysisActivate();
    if (name === 'settings') initSettings();
    // 智能问数机器人：仅经营分析相关页面显示
    if (window.shanSetAnalysisVisible) window.shanSetAnalysisVisible(name === 'reports' || name === 'analysis');
  }

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

  const requestedView = new URLSearchParams(location.search).get('view');
  switchView(views[requestedView] ? requestedView : 'crawl');
  startLogPolling();

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