/* PDF 转换管理页：拉取 /api/admin/pdf/jobs、渲染表格（含「是否已删除」列）、硬删。
   支持全选/多选批量硬删；删除直接执行，无二次确认。 */
(function () {
  "use strict";
  const { el, toast, fmtBytes, fmtTime, api } = window.ZK;
  const listEl = document.getElementById("list");
  const countEl = document.getElementById("count");
  const refreshBtn = document.getElementById("refresh");
  const bulkDeleteBtn = document.getElementById("bulkDelete");
  const selCountEl = document.getElementById("selCount");

  // 选中集合：以 job id 为键，值为对应行元素，便于 O(1) 增删与遍历
  const selected = new Map();

  refreshBtn.addEventListener("click", load);
  bulkDeleteBtn.addEventListener("click", bulkRemove);

  async function load() {
    listEl.innerHTML = '<div class="skel">加载中…</div>';
    countEl.textContent = "";
    selected.clear();
    updateBulkBtn();
    try {
      const res = await api("/api/admin/pdf/jobs?limit=500&offset=0");
      if (!res.ok) throw new Error("HTTP " + res.status);
      const body = await res.json();
      render(body.items || []);
      countEl.textContent = `共 ${body.total} 个任务`;
    } catch (e) {
      listEl.innerHTML = '<div class="empty">加载失败：' + (e.message || e) + "</div>";
    }
  }

  function render(items) {
    if (!items.length) {
      listEl.innerHTML = '<div class="empty">还没有任务。</div>';
      return;
    }
    const table = el("table", { class: "jobs-table admin-table" });
    const thead = el("thead", null,
      el("tr", null,
        el("th", { class: "col-check" },
          el("input", { type: "checkbox", id: "selectAll", onchange: onToggleAll })
        ),
        el("th", { class: "col-name" }, "文件名"),
        el("th", { class: "col-size" }, "大小"),
        el("th", { class: "col-status" }, "状态"),
        el("th", { class: "col-del" }, "是否已删除"),
        el("th", { class: "col-time" }, "创建时间"),
        el("th", { class: "col-act" }, "操作")
      )
    );
    const tbody = el("tbody", null);
    for (const j of items) tbody.appendChild(renderRow(j));
    table.appendChild(thead);
    table.appendChild(tbody);
    listEl.innerHTML = "";
    listEl.appendChild(table);
  }

  function renderRow(j) {
    const checkbox = el("input", { type: "checkbox", value: j.id, onchange: () => onToggleRow(j, checkbox, row) });
    const row = el("tr", { class: j.user_deleted ? "row-soft-deleted" : "" },
      el("td", { class: "col-check" }, checkbox),
      el("td", { class: "col-name" }, j.source_filename),
      el("td", { class: "col-size mono" }, fmtBytes(j.source_size)),
      el("td", { class: "col-status" }, statusCell(j)),
      el("td", { class: "col-del" }, deletedCell(j)),
      el("td", { class: "col-time muted" }, fmtTime(j.created_at)),
      el("td", { class: "col-act" },
        j.status === "done"
          ? el("a", { class: "btn", href: `/api/admin/files/${j.output_file_id}/download`, download: "" }, "下载产物")
          : el("span", { class: "muted" }, "-"),
        el("button", { class: "btn danger", onclick: () => remove(j, row) }, "硬删")
      )
    );
    // 行元素上缓存 job/checkbox 引用，供全选回调 O(1) 取用
    row.__job = j;
    row.__checkbox = checkbox;
    return row;
  }

  function onToggleAll(e) {
    const checked = e.target.checked;
    selected.clear();
    const rows = listEl.querySelectorAll("tbody tr");
    rows.forEach((row) => {
      if (row.__checkbox) row.__checkbox.checked = checked;
      if (checked && row.__job) selected.set(row.__job.id, row);
    });
    updateBulkBtn();
  }

  function onToggleRow(j, box, row) {
    if (box.checked) selected.set(j.id, row);
    else selected.delete(j.id);
    // 同步表头全选框状态
    const allBoxes = listEl.querySelectorAll('tbody input[type="checkbox"]');
    const selectAll = document.getElementById("selectAll");
    if (selectAll) selectAll.checked = allBoxes.length > 0 && [...allBoxes].every((b) => b.checked);
    updateBulkBtn();
  }

  function updateBulkBtn() {
    const n = selected.size;
    bulkDeleteBtn.disabled = n === 0;
    selCountEl.textContent = n > 0 ? `(${n})` : "";
  }

  function statusCell(j) {
    if (j.status === "done") return el("span", { class: "tag ok" }, "完成");
    if (j.status === "failed")
      return el("span", { class: "tag err", title: j.error_message || "" }, "失败");
    return el("span", { class: "tag warn" }, j.status === "converting" ? `转换中 ${j.progress}%` : "排队中");
  }

  function deletedCell(j) {
    if (j.user_deleted) {
      return el("span", { class: "tag err", title: fmtTime(j.deleted_at) }, "已删除");
    }
    return el("span", { class: "muted" }, "否");
  }

  // 单条硬删：直接执行，无二次确认
  async function remove(j, row) {
    try {
      const res = await api(`/api/admin/pdf/jobs/${j.id}`, { method: "DELETE" });
      if (res.status === 404) { toast("任务已不存在"); }
      else if (!res.ok) throw new Error("HTTP " + res.status);
      selected.delete(j.id);
      row.classList.add("row-removed");
      setTimeout(() => row.remove(), 250);
      toast("已硬删");
      decCount();
      updateBulkBtn();
    } catch (e) {
      toast("删除失败：" + (e.message || e), "err");
    }
  }

  // 批量硬删：并发删除所有选中项，无二次确认
  async function bulkRemove() {
    if (!selected.size) return;
    bulkDeleteBtn.disabled = true;
    const entries = [...selected.entries()];
    let ok = 0, fail = 0;
    await Promise.all(entries.map(async ([id, row]) => {
      try {
        const res = await api(`/api/admin/pdf/jobs/${id}`, { method: "DELETE" });
        if (res.ok || res.status === 404) {
          selected.delete(id);
          row.classList.add("row-removed");
          setTimeout(() => row.remove(), 250);
          ok++;
        } else {
          fail++;
        }
      } catch {
        fail++;
      }
    }));
    selected.clear();
    if (ok) { decCount(ok); toast(`已硬删 ${ok} 项` + (fail ? `，${fail} 项失败` : "")); }
    else if (fail) { toast(`批量删除失败（${fail} 项）`, "err"); }
    // 同步全选框
    const selectAll = document.getElementById("selectAll");
    if (selectAll) selectAll.checked = false;
    updateBulkBtn();
  }

  function decCount(n = 1) {
    const m = (countEl.textContent || "").match(/(\d+)/);
    if (m) countEl.textContent = `共 ${Math.max(0, Number(m[1]) - n)} 个任务`;
  }

  load();
})();