'use strict';

(function () {
const state = {
  shops: [],
  folderNameByShopId: new Map(),
  statusByShopId: new Map(),
};

let pollTimer = null;
let pollFailStreak = 0;
let crawlRoot = '';
let initialized = false;

function showToast(msg, type) {
  const wrap = document.getElementById('toast-wrap');
  const el = document.createElement('div');
  el.className = 'toast toast-' + (type || 'success');
  el.textContent = msg;
  wrap.appendChild(el);
  setTimeout(() => { el.style.opacity = '0'; el.style.transition = 'opacity 0.3s'; }, 2400);
  setTimeout(() => { if (el.parentNode) wrap.removeChild(el); }, 2800);
}

function jsonFetch(url, opts) {
  return fetch(url, opts).then((r) =>
    r.json().then((data) => {
      if (!r.ok) throw new Error(data.error || `HTTP ${r.status}`);
      return data;
    })
  );
}

// 店铺名/目录名来自外部平台数据，凡进 innerHTML 的文本必须先过 esc()
function esc(value) {
  const div = document.createElement('div');
  div.textContent = String(value ?? '');
  return div.innerHTML;
}

function renderShopTable() {
  const body = document.getElementById('shopTableBody');
  // 表格每 1.5s 随轮询全量重建，重建前记住用户已手动取消勾选的店铺，避免勾选被重置
  const uncheckedBefore = new Set();
  body.querySelectorAll('input[type=checkbox]').forEach((cb) => {
    if (!cb.checked) uncheckedBefore.add(cb.dataset.shopId);
  });
  body.innerHTML = '';
  document.getElementById('shopTableEmpty').style.display = state.shops.length ? 'none' : 'block';
  const countEl = document.getElementById('shopCount');
  if (countEl) countEl.textContent = state.shops.length + ' 家';
  for (const shop of state.shops) {
    const tr = document.createElement('tr');
    const tdCb = document.createElement('td');
    const cb = document.createElement('input');
    cb.type = 'checkbox'; cb.checked = !uncheckedBefore.has(String(shop.shopId)); cb.dataset.shopId = String(shop.shopId);
    tdCb.appendChild(cb); tr.appendChild(tdCb);
    const tdName = document.createElement('td');
    tdName.innerHTML = `<div class="shop-name">${esc(shop.shopName)}</div>`;
    tr.appendChild(tdName);
    const tdId = document.createElement('td');
    tdId.textContent = shop.shopId;
    tdId.className = 'num';
    tr.appendChild(tdId);
    const tdStatus = document.createElement('td');
    const st = state.statusByShopId.get(shop.shopId) || (shop.completed ? { state: 'skipped_completed' } : null);
    tdStatus.innerHTML = st ? statusBadgeHtml(st) : '<span class="badge">待抓取</span>';
    tr.appendChild(tdStatus);
    const saved = shop.completed;
    const folderName = state.folderNameByShopId.get(shop.shopId) || (saved ? saved.folderName : null);
    const tdFolder = document.createElement('td');
    tdFolder.className = 'col-folder';
    tdFolder.innerHTML = folderName
      ? `<span class="badge badge-ok">${esc(folderName)}</span>`
      : '<span class="badge">—</span>';
    tr.appendChild(tdFolder);
    tr.dataset.shopId = String(shop.shopId);
    body.appendChild(tr);
  }
}

function statusBadgeHtml(st) {
  const label = {
    pending: '排队中', running: '抓取中',
    done: `完成 ${st.downloaded}/${st.total || 0}`,
    skipped_completed: '已完成',
    failed: '失败', stopped: '已停止', interrupted: '已中断',
  }[st.state] || st.state;
  const cls = { done: 'badge-ok', failed: 'badge-fail', running: 'badge-warn' }[st.state] || 'badge-info';
  return `<span class="badge ${cls}">${esc(label)}</span>`;
}

const ICON_PLAY = '<svg viewBox="0 0 24 24" fill="currentColor" aria-hidden="true"><path d="M8 5v14l11-7z"/></svg>';

function renderCrawlState(cs) {
  const badge = document.getElementById('crawlStatusBadge');
  const labelMap = { idle: '空闲', running: '抓取中', done: '已完成', stopped: '已停止', error: '出错', interrupted: '已中断' };
  const clsMap = { running: 'badge-warn', done: 'badge-ok', error: 'badge-fail', stopped: 'badge-warn', interrupted: 'badge-warn' };
  badge.textContent = labelMap[cs.status] || cs.status;
  badge.className = 'badge ' + (clsMap[cs.status] || '');

  const startBtn = document.getElementById('startBtn');
  const stopBtn = document.getElementById('stopBtn');
  const startIcon = document.getElementById('startBtnIcon');
  const startText = document.getElementById('startBtnText');
  startBtn.disabled = cs.status === 'running';
  stopBtn.style.display = cs.status === 'running' ? '' : 'none';
  if (cs.status === 'running') {
    startIcon.innerHTML = '<span class="spinner spinner-inline"></span>';
    startText.textContent = '抓取中… 点击停止';
    startBtn.classList.remove('btn-primary');
    startBtn.classList.add('btn-ghost');
    startBtn.disabled = false;
  } else {
    startIcon.innerHTML = ICON_PLAY;
    startText.textContent = '开始抓取';
    startBtn.classList.remove('btn-ghost');
    startBtn.classList.add('btn-primary');
  }

  state.statusByShopId.clear();
  state.folderNameByShopId.clear();
  for (const s of cs.shops) {
    state.statusByShopId.set(s.shopId, s);
    if (s.folderName) state.folderNameByShopId.set(s.shopId, s.folderName);
  }
  renderShopTable();

  const list = document.getElementById('progressList');
  list.innerHTML = '';
  if (!cs.shops.length) {
    list.innerHTML = '<div class="empty-hint"><div class="empty-icon"><svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M4 6h16M4 12h10M4 18h16"/></svg></div><p>暂无任务</p></div>';
  }
  for (const s of cs.shops) {
    const row = document.createElement('div');
    row.className = 'progress-row';
    const pct = s.total > 0 ? Math.round((s.downloaded + s.skipped) / s.total * 100) : 0;
    row.innerHTML = `
      <div class="left"><span class="badge badge-info">采集</span><span class="name">${esc(s.shopName)}</span><span class="meta">· 菜品图</span></div>
      <div class="right">
        <div class="progress-bar"><span style="width:${pct}%;"></span></div>
        <span>${s.downloaded + s.skipped} / ${s.total || 0}</span>
        ${statusBadgeHtml(s)}
      </div>`;
    list.appendChild(row);
  }

  if (cs.status !== 'running' && pollTimer) { clearInterval(pollTimer); pollTimer = null; }
}

function startPolling() {
  if (pollTimer) clearInterval(pollTimer);
  const tick = () => jsonFetch('/api/crawl/status').then((cs) => {
    pollFailStreak = 0;
    renderCrawlState(cs);
  }).catch(() => {
    // 静默重试，但连续失败要给一次提示（服务可能重启），之后仍自动恢复
    pollFailStreak++;
    if (pollFailStreak === 3) showToast('抓取状态轮询失败（服务可能已重启），恢复后自动继续', 'error');
  });
  tick();
  pollTimer = setInterval(tick, 1500);
}

function refreshShops() {
  const root = crawlRoot;
  const query = root ? `?root=${btoa(unescape(encodeURIComponent(root))).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '')}` : '';
  return jsonFetch(`/api/shops${query}`).then((data) => { state.shops = data.shops || []; renderShopTable(); });
}

// 采集通道：按服务端探测结果给一行提示（客户端端口 / Cookie 是否就绪）
function renderChannelHint(info) {
  const el = document.getElementById('crawlChannelHint');
  if (!el) return;
  let msg;
  if (info.channel === 'client') {
    msg = info.clientUsable
      ? '将仅通过客户端采集（调试端口 9669 已就绪）'
      : '客户端未启动或调试端口（9669）未开：此模式下无法开始抓取';
  } else if (info.channel === 'cookie') {
    msg = info.cookieConfigured
      ? '将仅通过 Cookie 采集'
      : '尚未填写 Cookie：请在「设置 → 采集配置」粘贴';
  } else if (info.clientUsable) {
    msg = '已检测到客户端：将走客户端通道，失联时自动改用 Cookie';
  } else if (info.cookieConfigured) {
    msg = '未检测到客户端（9669 未开）：将使用 Cookie 通道';
  } else {
    msg = '未检测到客户端，也未填写 Cookie：开始抓取前请至少配置其一';
  }
  el.textContent = msg;
}

function refreshChannelInfo() {
  return jsonFetch('/api/crawl/channel').then(renderChannelHint).catch(() => {});
}

window.shanCrawlInit = function () {
  if (initialized) return;
  initialized = true;

  const modal = document.getElementById('modalAddShop');
  document.getElementById('btnToggleAdd').addEventListener('click', () => {
    modal.hidden = false;
    document.getElementById('manualInput').focus();
  });
  document.getElementById('btnCloseModal').addEventListener('click', () => { modal.hidden = true; });
  document.getElementById('btnCancelAdd').addEventListener('click', () => { modal.hidden = true; });
  modal.addEventListener('click', (e) => { if (e.target === modal) modal.hidden = true; });
  document.addEventListener('keydown', (e) => {
    if (e.key === 'Escape' && !modal.hidden) modal.hidden = true;
  });

  document.getElementById('btnClearLog').addEventListener('click', () => {
    document.getElementById('logPanel').innerHTML = '';
  });

  jsonFetch('/api/settings').then(s => {
    crawlRoot = s.rootDir;
    if (s.crawlChannel) document.getElementById('crawlChannel').value = s.crawlChannel;
    refreshChannelInfo();
    return refreshShops();
  });
  jsonFetch('/api/crawl/status').then((cs) => {
    renderCrawlState(cs);
    if (cs.status === 'running') startPolling();
  });

  document.getElementById('crawlChannel').addEventListener('change', function () {
    const value = this.value;
    jsonFetch('/api/settings', {
      method: 'POST', headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ crawlChannel: value }),
    }).then(() => {
      showToast('采集通道已保存');
      refreshChannelInfo();
    }).catch((e) => showToast('保存失败: ' + e.message, 'error'));
  });

  document.getElementById('useManualBtn').addEventListener('click', () => {
    const text = document.getElementById('manualInput').value;
    if (!text.trim()) return showToast('请先填写手动清单', 'error');
    jsonFetch('/api/shops/manual', {
      method: 'POST', headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ text }),
    }).then((data) => {
      state.shops = data.shops; renderShopTable();
      showToast(`已添加 ${data.addedCount} 家店铺`);
    }).catch((e) => showToast('添加失败: ' + e.message, 'error'));
  });

  document.getElementById('selectAllCb').addEventListener('change', (e) => {
    document.querySelectorAll('#shopTableBody input[type=checkbox]').forEach((cb) => { cb.checked = e.target.checked; });
  });

  document.getElementById('startBtn').addEventListener('click', () => {
    if (document.getElementById('stopBtn').style.display !== 'none') {
      jsonFetch('/api/crawl/stop', { method: 'POST' }).then(() => showToast('已发送停止请求'));
      return;
    }
    const shopIds = Array.from(document.querySelectorAll('#shopTableBody input[type=checkbox]'))
      .filter((cb) => cb.checked).map((cb) => Number(cb.dataset.shopId));
    if (!shopIds.length) return showToast('请先在店铺列表里勾选要抓取的店铺', 'error');
    const root = crawlRoot;
    jsonFetch('/api/crawl/start', {
      method: 'POST', headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ root, shopIds, forceFullCrawl: document.getElementById('forceFullCrawl').checked }),
    }).then(() => { showToast('已开始抓取'); startPolling(); })
      .catch((e) => showToast('启动失败: ' + e.message, 'error'));
  });

  document.getElementById('stopBtn').addEventListener('click', () => {
    jsonFetch('/api/crawl/stop', { method: 'POST' }).then(() => showToast('已发送停止请求'));
  });
};

// 视图感知：离开采集页暂停状态轮询，回页时按服务端实际状态决定是否恢复
//（app.js switchView 调用；shanCrawlInit 只在首次进入时绑事件，不会重复拉状态）
window.shanCrawlSetActive = function (active) {
  if (active) {
    refreshChannelInfo();
    jsonFetch('/api/crawl/status').then((cs) => {
      renderCrawlState(cs);
      if (cs.status === 'running') startPolling();
    }).catch(() => {});
  } else if (pollTimer) {
    clearInterval(pollTimer);
    pollTimer = null;
  }
};
})();