/* 通用爬虫系统 - 前端逻辑 */
"use strict";

const $ = (id) => document.getElementById(id);
const MODE_LABEL = { batch: "批量", scheduled: "定时", auto: "自动" };

const state = {
  tasks: [],
  editTask: null,          // 正在编辑的任务
  mode: "batch",           // 当前表单模式
  detail: { task: null, runId: null, logOffset: 0, timer: null },
  logTimer: null,
};
let formDirty = false;      // 新建/编辑表单是否有未保存修改

/* ---------------- 工具 ---------------- */
function toast(msg, isErr) {
  const t = document.createElement("div");
  t.className = "toast" + (isErr ? " error" : "");
  t.textContent = msg;
  document.body.appendChild(t);
  setTimeout(() => t.remove(), 2600);
}

async function api(url, opts) {
  const res = await fetch(url, opts);
  let data = null;
  try { data = await res.json(); } catch (e) { /* ignore */ }
  if (!res.ok) throw new Error((data && data.error) || `HTTP ${res.status}`);
  return data;
}

const esc = (s) => String(s == null ? "" : s).replace(/[&<>"']/g,
  (c) => ({ "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;" }[c]));

function fmtTime(iso) { return iso ? String(iso).replace("T", " ").slice(0, 19) : "—"; }

/* ---------------- 任务列表 ---------------- */
async function loadTasks() {
  try {
    state.tasks = await api("/api/tasks");
    renderTasks();
    const running = state.tasks.filter((t) => t.running).length;
    const pill = $("statusPill");
    pill.textContent = `运行中任务: ${running}`;
    pill.classList.toggle("active", running > 0);
    const st = await api("/api/status");
    $("version").textContent = `v${st.version}`;
  } catch (e) {
    toast("加载任务失败: " + e.message, true);
  }
  loadStats();
}

async function loadStats() {
  try {
    const s = await api("/api/stats");
    $("stTasks").textContent = s.tasks;
    $("stRunning").textContent = s.running;
    $("stRuns").textContent = s.runs;
    $("stOk").textContent = s.ok;
    $("stFail").textContent = s.fail;
    $("stImgs").textContent = s.images;
    $("stDisk").textContent = s.disk_mb >= 1024
      ? (s.disk_mb / 1024).toFixed(1) + " GB" : s.disk_mb + " MB";
    $("trashCount").textContent = s.trash || 0;
  } catch (e) { /* 统计失败忽略 */ }
}

function taskStatusBadge(t) {
  if (t.running) return '<span class="badge running">● 运行中</span>';
  const r = t.latest_run;
  if (r && r.status === "paused") return '<span class="badge paused">⏸ 已暂停</span>';
  if (t.mode === "scheduled" && t.schedule && t.schedule.enabled) {
    const next = t.schedule.next_run ? ` · 下次 ${t.schedule.next_run.slice(11)}` : "";
    return `<span class="badge scheduled-wait">⏰ 等待调度${esc(next)}</span>`;
  }
  if (r) return `<span class="badge ${r.status}">${({ completed: "✅ 已完成", failed: "❌ 失败", stopped: "⏹ 已停止" })[r.status] || esc(r.status)}</span>`;
  return '<span class="badge">未运行</span>';
}

function renderTasks() {
  const box = $("taskList");
  $("emptyState").classList.toggle("hidden", state.tasks.length > 0);
  box.innerHTML = state.tasks.map(taskCard).join("");
}

function taskCard(t) {
  const r = t.latest_run;
  const cfg = t.config || {};
  const prog = r && (r.status === "running" || r.status === "paused") ? `
    <div class="progress"><div style="width:${r.progress.percent || 0}%"></div></div>
    <div class="progress-label">
      <span>${r.progress.done || 0} / ${r.progress.total || "?"}</span>
      <span class="url-cell" style="max-width:220px">${esc(r.progress.current_url || "")}</span>
    </div>` : "";
  const stats = r ? `
    <div class="stats">
      <span class="ok">✅ ${r.stats.ok || 0}</span>
      <span class="fail">❌ ${r.stats.fail || 0}</span>
      <span class="img">🖼️ ${r.stats.images || 0}</span>
    </div>` : "";
  const urlCount = (t.urls || []).length;
  const line2 = t.mode === "auto"
    ? `起始: <b>${esc((t.auto && t.auto.seed_url) || "")}</b>`
    : `网址: <b>${urlCount}</b> 个`;
  const line3 = t.mode === "scheduled"
    ? `调度: <b>${t.schedule.type === "cron" ? esc(t.schedule.cron) : "每 " + (t.schedule.interval_value || "-") + " " + ({ minutes: "分钟", hours: "小时", days: "天" }[t.schedule.interval_unit] || "")}</b>`
    : "";
  const outDir = cfg.out_dir || "out/" + t.id;

  let acts = "";
  if (t.running) {
    acts = `
      <button class="btn sm" onclick="actTask('${t.id}','pause')">⏸ 暂停</button>
      <button class="btn sm" onclick="actTask('${t.id}','stop')">⏹ 终止</button>`;
  } else {
    const canStart = t.mode !== "scheduled" || (t.urls || []).length > 0;
    acts = `<button class="btn sm primary" ${canStart ? "" : "disabled"} onclick="actTask('${t.id}','start')">▶ 开始</button>`;
  }
  acts += `
    <button class="btn sm" onclick="openEdit('${t.id}')">✏️ 编辑</button>
    <button class="btn sm" onclick="openDetail('${t.id}')">📋 详情</button>
    <button class="btn sm danger" onclick="delTask('${t.id}')">🗑️</button>`;

  return `
  <div class="card">
    <div class="card-head">
      <span class="card-name" title="${esc(t.name)}">${esc(t.name)}</span>
      ${taskStatusBadge(t)}
    </div>
    <div class="card-meta">
      <span class="badge ${t.mode}">${MODE_LABEL[t.mode]}</span>
      <span class="card-line">${line2}</span>
    </div>
    ${line3 ? `<div class="card-line">${line3}</div>` : ""}
    <div class="card-line">输出: <b>${esc(outDir)}</b></div>
    ${prog}
    ${stats}
    <div class="card-actions">${acts}</div>
  </div>`;
}

/* ---------------- 任务操作 ---------------- */
async function actTask(tid, act) {
  try {
    const r = await api(`/api/tasks/${tid}/${act}`, { method: "POST" });
    if (r.msg) toast(r.msg);
    loadTasks();
    if (state.detail.task && state.detail.task.id === tid) openDetail(tid);
  } catch (e) { toast(e.message, true); }
}

async function delTask(tid) {
  const t = state.tasks.find((x) => x.id === tid);
  if (!confirm(`确定删除任务「${t ? t.name : tid}」？\n任务将移入回收站，可在回收站中恢复或彻底删除。`)) return;
  try {
    const r = await api(`/api/tasks/${tid}`, { method: "DELETE" });
    toast(r.msg || "已删除");
    loadTasks();
  } catch (e) { toast(e.message, true); }
}

/* ---------------- 搜索 ---------------- */
async function doSearch() {
  const q = $("searchInput").value.trim();
  if (!q) { toast("请输入搜索关键词", true); return; }
  try {
    const d = await api(`/api/search?q=${encodeURIComponent(q)}`);
    renderSearch(d);
    showModal("searchModal");
  } catch (e) { toast(e.message, true); }
}

function renderSearch(d) {
  const body = $("searchBody");
  if (!d.results.length) {
    body.innerHTML = `<div class="empty" style="padding:40px 0"><div class="empty-icon">🔍</div><p>没有找到与「${esc(d.q)}」相关的内容</p></div>`;
    return;
  }
  const items = d.results.map((r) => {
    const badge = `<span class="badge ${esc(r.mode)}">${MODE_LABEL[r.mode] || esc(r.mode)}</span>`;
    if (r.type === "task") {
      return `
      <div class="search-item">
        <div class="row">
          ${badge}
          <span class="title">📋 ${esc(r.task_name)}</span>
          <span class="badge">任务</span>
        </div>
        <div class="url">${r.seed_url ? "起始: " + esc(r.seed_url) : "网址 " + (r.urls_count || 0) + " 个"} · 创建于 ${esc(r.created_at || "")}</div>
        <div class="row">
          <button class="btn sm" onclick="searchOpenDetail('${r.task_id}')">📋 查看任务</button>
        </div>
      </div>`;
    }
    const stCls = r.status === "OK" ? "t-ok" : "t-fail";
    const html = r.html_file ? `<span class="file-link" onclick="searchPreview('${r.task_id}','${esc(r.html_file)}','HTML: ${esc(r.url)}')">HTML</span>` : "";
    const txt = r.txt_file ? `<span class="file-link" onclick="searchPreview('${r.task_id}','${esc(r.txt_file)}','文本: ${esc(r.url)}')">TXT</span>` : "";
    const meta = r.meta_file ? `<span class="file-link" onclick="searchMeta('${r.task_id}','${esc(r.meta_file)}')">📋 元数据</span>` : "";
    return `
    <div class="search-item">
      <div class="row">
        ${badge}
        <span class="title" title="${esc(r.title)}">${esc(r.title) || "（无标题）"}</span>
        <span class="badge ${stCls}">${r.status}</span>
        <span class="badge">${esc(r.run_status)}</span>
        <span class="card-line">${esc(r.crawl_time || "")}</span>
      </div>
      <div class="url">🌐 ${esc(r.url)}${r.images ? ` · 🖼️ ${r.images}` : ""}</div>
      <div class="row">
        ${html}${txt}${meta}
        <button class="btn sm" onclick="searchOpenDetail('${r.task_id}')">📋 任务详情</button>
      </div>
    </div>`;
  }).join("");
  body.innerHTML = `<div class="probe-summary"><span>关键词: <b>${esc(d.q)}</b></span><span>共 <b>${d.count}</b> 条结果</span></div>${items}`;
}

/* 搜索结果的跳转动作: 先关搜索弹窗再打开目标 */
function searchOpenDetail(tid) {
  hideModal("searchModal");
  openDetail(tid);
}
function searchPreview(tid, path, title) {
  hideModal("searchModal");
  previewFile(tid, path, title);
}
function searchMeta(tid, metaFile) {
  hideModal("searchModal");
  showMeta(tid, metaFile);
}

/* ---------------- 回收站 ---------------- */
async function openTrash() {
  try {
    const items = await api("/api/trash");
    state.trashItems = items;
    renderTrash(items);
    showModal("trashModal");
  } catch (e) { toast(e.message, true); }
}

function renderTrash(items) {
  const body = $("trashBody");
  if (!items.length) {
    body.innerHTML = `<div class="empty" style="padding:40px 0"><div class="empty-icon">🗑️</div><p>回收站是空的</p></div>`;
    return;
  }
  body.innerHTML = items.map((t) => `
    <div class="trash-item">
      <div class="card-head" style="min-width:0">
        <span class="card-name" title="${esc(t.name)}">${esc(t.name)}</span>
        <span class="badge ${esc(t.mode)}">${MODE_LABEL[t.mode] || esc(t.mode)}</span>
      </div>
      <div class="card-line">删除时间: <b>${esc(t.deleted_at)}</b> · 运行次数: <b>${t.runs_count || 0}</b></div>
      <div class="card-line">输出目录: <b>${esc(t.out_dir || "")}</b></div>
      <div class="card-actions">
        <button class="btn sm primary" onclick="restoreTrash('${t.id}')">↩️ 恢复</button>
        <button class="btn sm danger" onclick="purgeTrashTask('${t.id}')">🗑️ 彻底删除</button>
      </div>
    </div>`).join("")
    + `<div class="trash-foot">
        <span class="card-line">共 ${items.length} 项 · 彻底删除将移除任务配置与运行记录（默认输出目录一并清理）</span>
        <button class="btn danger" onclick="clearTrash()">🧹 清空回收站</button>
      </div>`;
}

async function restoreTrash(tid) {
  try {
    const r = await api(`/api/trash/${tid}/restore`, { method: "POST" });
    toast(r.msg || "已恢复");
    openTrash();
    loadTasks();
  } catch (e) { toast(e.message, true); }
}

async function purgeTrashTask(tid) {
  const t = state.trashItems && state.trashItems.find((x) => x.id === tid);
  if (!confirm(`彻底删除任务「${t ? t.name : tid}」？\n任务配置与所有运行记录将永久删除，不可恢复！`)) return;
  try {
    const r = await api(`/api/trash/${tid}`, { method: "DELETE" });
    toast(r.files_removed ? "已彻底删除（含输出文件）" : "已彻底删除（自定义输出目录已保留）");
    openTrash();
    loadTasks();
  } catch (e) { toast(e.message, true); }
}

async function clearTrash() {
  if (!confirm(`确定清空回收站？\n回收站中所有任务将永久删除，不可恢复！`)) return;
  try {
    const r = await api("/api/trash", { method: "DELETE" });
    toast(`已清空 ${r.purged} 项`);
    openTrash();
    loadTasks();
  } catch (e) { toast(e.message, true); }
}

/* ---------------- 新建 / 编辑表单 ---------------- */
function switchMode(mode, lock) {
  state.mode = mode;
  document.querySelectorAll("#modeTabs .tab").forEach((b) => {
    b.classList.toggle("active", b.dataset.mode === mode);
    b.disabled = !!lock;
  });
  $("urlsField").classList.toggle("hidden", mode !== "batch" && mode !== "scheduled");
  $("scheduleBox").classList.toggle("hidden", mode !== "scheduled");
  $("autoBox").classList.toggle("hidden", mode !== "auto");
}

function toLocalInputVal(iso) {
  if (!iso) return "";
  const d = new Date(String(iso).replace(" ", "T"));
  if (isNaN(d.getTime())) return "";
  const p = (n) => String(n).padStart(2, "0");
  return `${d.getFullYear()}-${p(d.getMonth() + 1)}-${p(d.getDate())}T${p(d.getHours())}:${p(d.getMinutes())}`;
}

function openCreate() {
  state.editTask = null;
  formDirty = false;
  $("modalTitle").textContent = "新建爬取任务";
  $("taskForm").reset();
  $("taskForm").elements["delay_min"].value = 2;
  $("taskForm").elements["delay_max"].value = 5;
  $("taskForm").elements["timeout"].value = 60;
  $("taskForm").elements["retry_count"].value = 2;
  $("taskForm").elements["retry_interval"].value = 3;
  $("taskForm").elements["notify_email"].value = "wlq@tphai.com";
  $("formHint").textContent = "";
  switchMode("batch", false);
  showModal("taskModal");
}

async function openEdit(tid) {
  const t = state.tasks.find((x) => x.id === tid) || await api(`/api/tasks/${tid}`);
  state.editTask = t;
  $("modalTitle").textContent = `编辑任务「${t.name}」`;
  const f = $("taskForm");
  f.reset();
  const cfg = t.config || {};
  f.elements["name"].value = t.name || "";
  f.elements["out_dir"].value = cfg.out_dir || "";
  f.elements["delay_min"].value = cfg.delay_min ?? 2;
  f.elements["delay_max"].value = cfg.delay_max ?? 5;
  f.elements["timeout"].value = cfg.timeout ?? 60;
  f.elements["retry_count"].value = cfg.retry_count ?? 2;
  f.elements["retry_interval"].value = cfg.retry_interval ?? 3;
  f.elements["crawl_images"].checked = !!cfg.crawl_images;
  f.elements["notify"].checked = !!cfg.notify;
  f.elements["notify_email"].value = cfg.notify_email || "wlq@tphai.com";
  f.elements["urls"].value = (t.urls || []).join("\n");
  if (t.mode === "scheduled" && t.schedule) {
    f.elements["schedule_type"].value = t.schedule.type || "interval";
    f.elements["schedule_enabled"].checked = t.schedule.enabled !== false;
    f.elements["interval_value"].value = t.schedule.interval_value ?? 24;
    f.elements["interval_unit"].value = t.schedule.interval_unit || "hours";
    f.elements["cron"].value = t.schedule.cron || "";
    f.elements["first_run"].value = toLocalInputVal(t.schedule.next_run || "");
  }
  if (t.mode === "auto" && t.auto) {
    f.elements["seed_url"].value = t.auto.seed_url || "";
    f.elements["include"].value = (t.auto.include || []).join("\n");
    f.elements["exclude"].value = (t.auto.exclude || []).join("\n");
    f.elements["same_domain"].checked = t.auto.same_domain !== false;
    f.elements["use_regex"].checked = !!t.auto.use_regex;
    f.elements["max_pages"].value = t.auto.max_pages ?? 50;
    f.elements["max_depth"].value = t.auto.max_depth ?? 2;
  }
  syncScheduleUI();
  $("formHint").textContent = t.running
    ? "⚠️ 任务运行中：参数修改将热更新（网址/规则改动下次运行生效）"
    : "";
  formDirty = false;
  switchMode(t.mode, true);
  showModal("taskModal");
}

function syncScheduleUI() {
  const f = $("taskForm");
  const t = f.elements["schedule_type"].value;
  $("intervalBox").classList.toggle("hidden", t !== "interval");
  $("cronBox").classList.toggle("hidden", t !== "cron");
}

function splitLines(v) { return String(v || "").split("\n").map((s) => s.trim()).filter(Boolean); }

async function submitForm(e) {
  e.preventDefault();
  const f = $("taskForm");
  const name = f.elements["name"].value.trim();
  if (!name) { toast("请填写项目名称", true); return; }
  const mode = state.mode;
  const config = {
    out_dir: f.elements["out_dir"].value.trim(),
    delay_min: parseFloat(f.elements["delay_min"].value) || 2,
    delay_max: parseFloat(f.elements["delay_max"].value) || 5,
    timeout: parseInt(f.elements["timeout"].value) || 60,
    retry_count: parseInt(f.elements["retry_count"].value) || 0,
    retry_interval: parseFloat(f.elements["retry_interval"].value) || 3,
    crawl_images: f.elements["crawl_images"].checked,
    notify: f.elements["notify"].checked,
    notify_email: f.elements["notify_email"].value.trim() || "wlq@tphai.com",
  };
  const urls = splitLines(f.elements["urls"].value);
  const payload = { name, mode, config, urls };
  if (mode === "auto") {
    payload.auto = {
      seed_url: f.elements["seed_url"].value.trim(),
      include: splitLines(f.elements["include"].value),
      exclude: splitLines(f.elements["exclude"].value),
      same_domain: f.elements["same_domain"].checked,
      use_regex: f.elements["use_regex"].checked,
      max_pages: parseInt(f.elements["max_pages"].value) || 50,
      max_depth: parseInt(f.elements["max_depth"].value) || 2,
    };
  }
  if (mode === "scheduled") {
    payload.schedule = {
      type: f.elements["schedule_type"].value,
      enabled: f.elements["schedule_enabled"].checked,
      interval_unit: f.elements["interval_unit"].value,
      interval_value: parseInt(f.elements["interval_value"].value) || 1,
      cron: f.elements["cron"].value.trim(),
      first_run: f.elements["first_run"].value || "",
    };
  }
  try {
    if (state.editTask) {
      await api(`/api/tasks/${state.editTask.id}`, {
        method: "PUT", headers: { "Content-Type": "application/json" },
        body: JSON.stringify(payload),
      });
      toast("任务已更新");
    } else {
      const t = await api("/api/tasks", {
        method: "POST", headers: { "Content-Type": "application/json" },
        body: JSON.stringify(payload),
      });
      toast(`任务「${t.name}」已创建`);
    }
    formDirty = false;
    hideModal("taskModal");
    loadTasks();
  } catch (err) { toast(err.message, true); }
}

/* ---------------- 详情 ---------------- */
async function openDetail(tid) {
  try {
    const t = await api(`/api/tasks/${tid}`);
    state.detail.task = t;
    const runs = t.runs || [];
    state.detail.runId = runs.find((r) => r.status === "running")
      ? runs[0].id : (runs[0] ? runs[0].id : null);
    state.detail.logOffset = 0;
    $("detailTitle").textContent = `任务详情 · ${t.name}`;
    renderDetail();
    showModal("detailModal");
    startLogPoll();
  } catch (e) { toast(e.message, true); }
}

function renderDetail() {
  const t = state.detail.task;
  const runs = t.runs || [];
  const run = runs.find((r) => r.id === state.detail.runId) || runs[0] || null;
  state.detail.runId = run ? run.id : null;
  const cfg = t.config || {};

  const meta = `
    <div class="detail-meta">
      <span>模式: <b>${MODE_LABEL[t.mode] || t.mode}</b></span>
      <span>任务ID: <b>${t.id}</b></span>
      <span>创建: <b>${fmtTime(t.created_at)}</b></span>
      <span>输出: <b>${esc(cfg.out_dir || "out/" + t.id)}</b></span>
      ${t.mode === "auto" ? `<span>起始: <b>${esc((t.auto && t.auto.seed_url) || "")}</b></span>` : ""}
    </div>`;

  let sched = "";
  if (t.mode === "scheduled" && t.schedule) {
    const s = t.schedule;
    sched = `<div class="detail-meta">
      <span>调度: <b>${s.type === "cron" ? esc(s.cron) : "每 " + (s.interval_value || "-") + " " + ({ minutes: "分钟", hours: "小时", days: "天" }[s.interval_unit] || "")}</b></span>
      <span>启用: <b>${s.enabled ? "是" : "否"}</b></span>
      <span>下次: <b>${esc(s.next_run || "—")}</b></span>
      <span>上次: <b>${esc(s.last_run || "—")}</b></span>
      <span>已运行: <b>${s.runs_count || 0}</b> 次</span>
    </div>`;
  }

  const acts = `
    <div class="detail-actions">
      ${t.running ? `
        <button class="btn" onclick="actTask('${t.id}','pause')">⏸ 暂停</button>
        <button class="btn danger" onclick="actTask('${t.id}','stop')">⏹ 终止</button>`
      : `<button class="btn primary" onclick="actTask('${t.id}','start')">▶ 立即执行</button>`}
      ${t.mode === "auto" ? `<button class="btn" onclick="probeTask('${t.id}')">🧪 试爬取</button>` : ""}
      <button class="btn" onclick="openEdit('${t.id}')">✏️ 编辑配置</button>
    </div>`;

  const chips = runs.map((r) => `
    <span class="run-chip ${r.id === state.detail.runId ? "active" : ""}"
          onclick="selectRun('${r.id}')">
      ${fmtTime(r.started_at).slice(5)} · ${r.status} · ${r.progress.done || 0}/${r.progress.total || "?"}
    </span>`).join("");

  const body = run ? renderRunPanel(t, run) : '<div class="card-line">暂无运行记录，点击「立即执行」开始第一次爬取。</div>';

  $("detailBody").innerHTML = `
    ${meta}
    ${sched}
    ${acts}
    <div class="runs-bar">${chips || '<span class="card-line">暂无运行记录</span>'}</div>
    ${body}`;
}

function renderRunPanel(t, run) {
  const s = run.stats || { ok: 0, fail: 0, images: 0 };
  const prog = run.status === "running" || run.status === "paused" ? `
    <div class="progress"><div style="width:${run.progress.percent || 0}%"></div></div>` : "";
  const results = run.results || [];
  const rows = results.map((r, i) => {
    const statusCls = r.status === "OK" ? "t-ok" : "t-fail";
    const html = r.html_file ? `<span class="file-link" onclick="previewFile('${t.id}','${esc(r.html_file)}','HTML: ${esc(r.url)}')">HTML</span>` : "—";
    const txt = r.txt_file ? `<span class="file-link" onclick="previewFile('${t.id}','${esc(r.txt_file)}','文本: ${esc(r.url)}')">TXT</span>` : "—";
    const imgs = (r.images || []).length
      ? `<span class="file-link" onclick="scrollThumbs()">🖼️ ${(r.images || []).length}</span>` : "—";
    const ctime = r.crawl_time ? `<span title="${esc(r.crawl_time)}">${esc(r.crawl_time.slice(5, 19))}</span>` : "—";
    const meta = r.meta_file
      ? `<span class="file-link" onclick="showMeta('${t.id}','${esc(r.meta_file)}')">📋 元数据</span>` : "—";
    return `<tr>
      <td>${i + 1}</td>
      <td class="${statusCls}">${r.status}</td>
      <td class="title-cell" title="${esc(r.title)}">${esc(r.title)}</td>
      <td class="url-cell" title="${esc(r.url)}">${esc(r.url)}</td>
      <td>${ctime}</td>
      <td>${html}</td><td>${txt}</td><td>${imgs}</td>
      <td>${meta}</td>
      <td title="${esc(r.error || "")}">${esc((r.error || "").slice(0, 50))}</td>
    </tr>`;
  }).join("");
  const thumbs = results.flatMap((r) => r.images || []).slice(0, 60);
  const thumbHtml = thumbs.length ? `
    <div id="thumbsBox" class="thumbs">
      ${thumbs.map((im) => `<img src="/api/file?task_id=${t.id}&path=${esc(im.file)}" loading="lazy"
        onclick="previewFile('${t.id}','${esc(im.file)}','图片预览')">`).join("")}
    </div>` : "";

  return `
  <div class="run-panel">
    <div class="run-stats">
      <span>运行ID: <b>${run.id}</b></span>
      <span>状态: <b class="${run.status === "running" ? "t-ok" : ""}">${run.status}</b></span>
      <span>开始: <b>${fmtTime(run.started_at)}</b></span>
      <span>结束: <b>${fmtTime(run.finished_at)}</b></span>
      <span class="ok">✅ ${s.ok}</span>
      <span class="fail">❌ ${s.fail}</span>
      <span class="img">🖼️ ${s.images}</span>
    </div>
    ${prog}
    <div class="card-line">当前: <b>${esc(run.progress.current_url || "")}</b></div>
    ${results.length ? `
      <div class="table-wrap">
        <table>
          <thead><tr><th>#</th><th>状态</th><th>标题</th><th>网址</th><th>爬取时间</th><th>HTML</th><th>TXT</th><th>图片</th><th>元数据</th><th>错误</th></tr></thead>
          <tbody>${rows}</tbody>
        </table>
      </div>` : '<div class="card-line">暂无结果</div>'}
    ${thumbHtml}
    <div class="logs" id="logBox"></div>
  </div>`;
}

function scrollThumbs() {
  const box = $("thumbsBox");
  if (box) box.scrollIntoView({ behavior: "smooth", block: "center" });
}

async function selectRun(rid) {
  state.detail.runId = rid;
  state.detail.logOffset = 0;
  renderDetail();
  startLogPoll();
}

async function startLogPoll() {
  stopLogPoll();
  const t = state.detail.task;
  if (!t || !state.detail.runId) return;
  const rid = state.detail.runId;
  const tick = async () => {
    try {
      const d = await api(`/api/runs/${rid}/logs?offset=${state.detail.logOffset}`);
      if (d.logs && d.logs.length) {
        const box = $("logBox");
        if (box) {
          const atBottom = box.scrollHeight - box.scrollTop - box.clientHeight < 40;
          d.logs.forEach((l) => {
            const div = document.createElement("div");
            div.className = l.level;
            div.textContent = `[${l.ts}] ${l.msg}`;
            box.appendChild(div);
          });
          if (atBottom) box.scrollTop = box.scrollHeight;
          state.detail.logOffset += d.logs.length;
        }
      }
    } catch (e) { /* ignore */ }
    loadTasks();   // 后台保持列表刷新
  };
  tick();
  state.logTimer = setInterval(tick, 2500);
}

function stopLogPoll() {
  if (state.logTimer) { clearInterval(state.logTimer); state.logTimer = null; }
}

/* ---------------- 试爬取 ---------------- */
function collectProbeFromForm() {
  const f = $("taskForm");
  return {
    seed_url: f.elements["seed_url"].value.trim(),
    include: splitLines(f.elements["include"].value),
    exclude: splitLines(f.elements["exclude"].value),
    same_domain: f.elements["same_domain"].checked,
    use_regex: f.elements["use_regex"].checked,
    timeout: parseInt(f.elements["timeout"].value) || 60,
  };
}

async function runProbe(params, btn) {
  if (btn) { btn.disabled = true; btn.textContent = "⏳ 探测中..."; }
  try {
    const r = await api("/api/probe", {
      method: "POST", headers: { "Content-Type": "application/json" },
      body: JSON.stringify(params),
    });
    renderProbe(r);
  } catch (e) { toast(e.message, true); }
  finally {
    if (btn) { btn.disabled = false; btn.textContent = "🧪 试爬取"; }
  }
}

async function probeTask(tid) {
  try {
    const r = await api(`/api/tasks/${tid}/probe`, { method: "POST" });
    renderProbe(r);
  } catch (e) { toast(e.message, true); }
}

function renderProbe(r) {
  const body = $("probeBody");
  if (!r.ok) {
    body.innerHTML = `<div class="card-line">❌ ${esc(r.error || "试爬取失败")}</div>`;
    showModal("probeModal");
    return;
  }
  const included = r.included || [];
  const excluded = r.excluded || [];
  const incHtml = included.length
    ? included.map((u) => `<div class="probe-item included"><span class="u">${esc(u)}</span></div>`).join("")
    : '<div class="card-line">没有符合条件的链接，请调整规则</div>';
  const excHtml = excluded.length
    ? excluded.map((x) => `<div class="probe-item excluded"><span class="u">${esc(x.url)}</span><span class="reason">${esc(x.reason)}</span></div>`).join("")
    : '<div class="card-line">无</div>';
  const moreInc = r.total_included > included.length
    ? `<div class="card-line">... 还有 ${r.total_included - included.length} 条未显示</div>` : "";
  const moreExc = r.total_excluded > excluded.length
    ? `<div class="card-line">... 还有 ${r.total_excluded - excluded.length} 条未显示</div>` : "";
  body.innerHTML = `
    <div class="probe-summary">
      <span>页面标题: <b>${esc(r.title)}</b></span>
      <span>抓取时间: <b>${esc(r.crawled_at)}</b></span>
    </div>
    <div class="probe-summary">
      <span>发现链接: <b>${r.total_links}</b> 条</span>
      <span class="t-ok">✅ 将爬取: <b>${r.total_included}</b> 条</span>
      <span class="t-fail">🚫 被排除: <b>${r.total_excluded}</b> 条</span>
    </div>
    <div class="card-line" style="font-weight:600">✅ 符合规则、将爬取的链接（显示前 ${included.length} 条）:</div>
    <div class="probe-list">${incHtml}${moreInc}</div>
    <div class="card-line" style="font-weight:600;margin-top:8px">🚫 被排除的链接及原因（显示前 ${excluded.length} 条）:</div>
    <div class="probe-list">${excHtml}${moreExc}</div>`;
  showModal("probeModal");
}

/* ---------------- 元数据查看 ---------------- */
const META_FIELDS = [
  ["type", "资源类型"], ["mode", "爬取模式"], ["task_name", "任务名称"],
  ["task_id", "任务ID"], ["run_id", "运行ID"], ["crawl_time", "爬取时间"],
  ["url", "爬取网址"], ["source_url", "来源链接"], ["depth", "爬取深度"],
  ["title", "页面标题"], ["status", "状态"], ["attempts", "尝试次数"],
  ["error", "错误信息"], ["html_file", "HTML文件"], ["txt_file", "文本文件"],
  ["page_url", "所属页面"],
];

async function showMeta(taskId, metaFile) {
  try {
    const data = await api(`/api/file?task_id=${taskId}&path=${encodeURIComponent(metaFile)}`);
    const rows = META_FIELDS.filter(([k]) => data[k] !== undefined && data[k] !== "" && data[k] !== null)
      .map(([k, label]) => {
        let v = data[k];
        if (k === "status") v = `<span class="${v === "OK" ? "t-ok" : "t-fail"}">${esc(v)}</span>`;
        if (k === "mode") v = `<span class="badge ${esc(v)}">${MODE_LABEL[v] || esc(v)}</span>`;
        if (k === "type") v = v === "images" ? "🖼️ 图片集" : "📄 网页";
        if (k === "depth") v = v === 0 ? "0（起始页）" : esc(v);
        return `<tr><td>${label}</td><td>${v}</td></tr>`;
      }).join("");
    // 来源链接空值也显示(起始页无来源)
    const srcRow = `<tr><td>来源链接</td><td>${data.source_url ? esc(data.source_url) : "—（起始页，无来源）"}</td></tr>`;
    const finalRows = rows.includes(srcRow) ? rows : rows + srcRow;
    let imgs = "";
    if (data.images && data.images.length) {
      imgs = `
        <div class="card-line" style="font-weight:600;margin-top:8px">🖼️ 图片明细（${data.images.length} 张）:</div>
        <div class="table-wrap" style="max-height:200px">
          <table><thead><tr><th>文件</th><th>原始URL</th><th>大小</th><th>下载时间</th></tr></thead><tbody>
          ${data.images.map((im) => `<tr>
            <td>${esc(im.file)}</td>
            <td class="url-cell" title="${esc(im.url)}">${esc(im.url)}</td>
            <td>${im.size ? Math.round(im.size / 1024) + " KB" : "—"}</td>
            <td>${esc(im.download_time || "")}</td></tr>`).join("")}
          </tbody></table>
        </div>`;
    }
    $("metaBody").innerHTML = `<table class="meta-table"><tbody>${finalRows}</tbody></table>${imgs}`;
    showModal("metaModal");
  } catch (e) { toast(e.message, true); }
}

/* ---------------- 文件预览 ---------------- */
function previewFile(tid, path, title) {
  $("previewTitle").textContent = title || "预览";
  $("previewFrame").src = `/api/file?task_id=${tid}&path=${encodeURIComponent(path)}`;
  showModal("previewModal");
}

/* ---------------- 弹窗控制 ---------------- */
function showModal(id) { $(id).classList.remove("hidden"); }
function hideModal(id) { $(id).classList.add("hidden"); }

/* 关闭任务弹窗: 有未保存修改时先确认 */
function safeCloseTaskModal() {
  if (formDirty && !confirm("有未保存的修改，确定要放弃吗？")) return false;
  formDirty = false;
  hideModal("taskModal");
  return true;
}

/* ---------------- 主题切换 ---------------- */
function applyTheme(theme) {
  document.body.dataset.theme = theme;
  $("btnTheme").textContent = theme === "light" ? "🌙" : "☀️";
  try { localStorage.setItem("crawler_theme", theme); } catch (e) { /* ignore */ }
}
$("btnTheme").onclick = () => {
  applyTheme(document.body.dataset.theme === "light" ? "dark" : "light");
};
try {
  applyTheme(localStorage.getItem("crawler_theme") || "dark");
} catch (e) {
  applyTheme("dark");
}

/* ---------------- 事件绑定 ---------------- */
$("btnNew").onclick = openCreate;
$("btnNew2").onclick = openCreate;
$("btnRefresh").onclick = loadTasks;
$("btnTrash").onclick = openTrash;
$("btnSearch").onclick = doSearch;
$("searchInput").addEventListener("keydown", (e) => { if (e.key === "Enter") doSearch(); });
$("btnProbe").onclick = () => {
  const p = collectProbeFromForm();
  if (!p.seed_url) { toast("请先填写起始网址", true); return; }
  runProbe(p, $("btnProbe"));
};

document.querySelectorAll("#modeTabs .tab").forEach((b) => {
  b.onclick = () => { switchMode(b.dataset.mode, false); };
});
$("taskForm").onsubmit = submitForm;
$("taskForm").elements["schedule_type"].onchange = syncScheduleUI;

document.querySelectorAll("[data-close]").forEach((b) => b.onclick = safeCloseTaskModal);
document.querySelectorAll("[data-close-detail]").forEach((b) => b.onclick = () => { stopLogPoll(); hideModal("detailModal"); });
document.querySelectorAll("[data-close-preview]").forEach((b) => b.onclick = () => { $("previewFrame").src = "about:blank"; hideModal("previewModal"); });
document.querySelectorAll("[data-close-probe]").forEach((b) => b.onclick = () => hideModal("probeModal"));
document.querySelectorAll("[data-close-meta]").forEach((b) => b.onclick = () => hideModal("metaModal"));
document.querySelectorAll("[data-close-trash]").forEach((b) => b.onclick = () => hideModal("trashModal"));
document.querySelectorAll("[data-close-search]").forEach((b) => b.onclick = () => hideModal("searchModal"));

/* 表单改动监听 -> 脏标记 */
$("taskForm").addEventListener("input", () => { formDirty = true; });
$("taskForm").addEventListener("change", () => { formDirty = true; });

document.querySelectorAll(".modal-overlay").forEach((ov) => {
  ov.addEventListener("mousedown", (e) => {
    if (e.target === ov) {
      if (ov.id === "taskModal") {
        safeCloseTaskModal();
      } else {
        if (ov.id === "detailModal") stopLogPoll();
        if (ov.id === "previewModal") $("previewFrame").src = "about:blank";
        ov.classList.add("hidden");
      }
    }
  });
});
document.addEventListener("keydown", (e) => {
  if (e.key === "Escape") {
    if (!$("taskModal").classList.contains("hidden")) {
      safeCloseTaskModal();
      return;
    }
    stopLogPoll();
    $("previewFrame").src = "about:blank";
    ["detailModal", "probeModal", "metaModal", "trashModal", "searchModal", "previewModal"].forEach((id) => $(id).classList.add("hidden"));
  }
});

/* ---------------- 启动 ---------------- */
loadTasks();
setInterval(() => {
  const detailOpen = !$("detailModal").classList.contains("hidden");
  if (!detailOpen) loadTasks();
}, 4000);