// @vitest-environment happy-dom
// 重現「稽核日誌 facet 多選項點了無法取消」bug。
// 用真實 facet DOM 結構 + 逐字複製的 click handler。
import { describe, it, expect, beforeEach } from "vitest";

// ── 真實 facet panel DOM（取自 知識庫視覺圖最終版.html）──
function buildPane() {
  const pane = document.createElement("div");
  pane.className = "admin-pane";
  pane.dataset.tab = "audit";
  pane.innerHTML = `
    <div class="audit-layout"><aside class="facet-panel">
      <div class="facet-group">
        <div class="facet-group__title">時間範圍</div>
        <div class="facet-item is-checked"><div class="facet-checkbox"></div><span class="facet-item__name">近 7 天</span><span class="facet-item__count">3.2k</span></div>
        <div class="facet-item"><div class="facet-checkbox"></div><span class="facet-item__name">近 30 天</span><span class="facet-item__count">12.8k</span></div>
      </div>
      <div class="facet-group">
        <div class="facet-group__title">事件類型</div>
        <div class="facet-item is-checked"><div class="facet-checkbox"></div><span class="facet-item__name">🔐 驗證 / 登入</span><span class="facet-item__count">412</span></div>
        <div class="facet-item is-checked"><div class="facet-checkbox"></div><span class="facet-item__name">👁 讀取</span><span class="facet-item__count">2.1k</span></div>
      </div>
      <div class="facet-group">
        <div class="facet-group__title">風險等級</div>
        <div class="facet-item is-checked"><div class="facet-checkbox"></div><span class="facet-item__name">🔴 高</span><span class="facet-item__count">3</span></div>
      </div>
      <div class="facet-group">
        <div class="facet-group__title">使用者</div>
        <div class="facet-item"><div class="facet-checkbox"></div><span class="facet-item__name">陳怡君(我)</span><span class="facet-item__count">82</span></div>
      </div>
    </aside></div>`;
  document.body.appendChild(pane);
  return pane;
}

// ── 逐字複製目前 app.js 的 handler（含 loadAuditPane 樁）──
let loadCalls = 0;
function loadAuditPane() { loadCalls++; }

// 逐字複製 wireAuditPane 的冪等註冊（remove-before-add）
function attachHandler(pane) {
  const _MULTI_FACET_GROUPS = ["事件類型", "風險等級", "結果"];
  if (pane._kbv5FacetHandler) pane.removeEventListener("click", pane._kbv5FacetHandler);
  const facetHandler = (e) => {
    const item = e.target.closest(".facet-item");
    if (!item || !pane.contains(item)) return;
    const nameEl = item.querySelector(".facet-item__name");
    if (!nameEl || (nameEl.textContent || "").includes("無資料")) return;
    const group = item.closest(".facet-group");
    if (!group) return;
    const title = (group.querySelector(".facet-group__title") || {}).textContent || "";
    if (_MULTI_FACET_GROUPS.includes(title)) {
      item.classList.toggle("is-checked");
    } else {
      const wasChecked = item.classList.contains("is-checked");
      group.querySelectorAll(".facet-item").forEach((x) => x.classList.remove("is-checked"));
      if (!(title === "使用者" && wasChecked)) item.classList.add("is-checked");
    }
    loadAuditPane(pane);
  };
  pane.addEventListener("click", facetHandler);
  pane._kbv5FacetHandler = facetHandler;
}

function findGroup(pane, title) {
  return Array.from(pane.querySelectorAll(".facet-group"))
    .find((g) => g.querySelector(".facet-group__title").textContent === title);
}

describe("稽核 facet 點選", () => {
  let pane;
  beforeEach(() => {
    document.body.innerHTML = "";
    loadCalls = 0;
    pane = buildPane();
    attachHandler(pane);
  });

  it("事件類型（多選）點已勾選項 → 應取消勾選", () => {
    const g = findGroup(pane, "事件類型");
    const item = g.querySelector(".facet-item.is-checked");        // 第一個已勾的
    expect(item.classList.contains("is-checked")).toBe(true);
    // 模擬點擊名稱 span（真實使用者多半點在文字上）
    item.querySelector(".facet-item__name").dispatchEvent(new Event("click", { bubbles: true }));
    expect(item.classList.contains("is-checked")).toBe(false);    // ← 應已取消
  });

  it("點 checkbox 方塊也要能取消", () => {
    const g = findGroup(pane, "事件類型");
    const item = g.querySelector(".facet-item.is-checked");
    item.querySelector(".facet-checkbox").dispatchEvent(new Event("click", { bubbles: true }));
    expect(item.classList.contains("is-checked")).toBe(false);
  });

  it("時間範圍（單選）點另一項 → 切換", () => {
    const g = findGroup(pane, "時間範圍");
    const items = g.querySelectorAll(".facet-item");
    items[1].querySelector(".facet-item__name").dispatchEvent(new Event("click", { bubbles: true }));
    expect(items[0].classList.contains("is-checked")).toBe(false);
    expect(items[1].classList.contains("is-checked")).toBe(true);
  });

  // ── 回歸：真因 = mockup demo script 對每個 .facet-item 設了 onclick=toggle，與 app handler 抵消 ──
  // 模擬 mockup：document.querySelectorAll('.facet-item').forEach(i => i.onclick = () => i.classList.toggle('is-checked'))
  function applyMockupOnclick(p) {
    p.querySelectorAll(".facet-item").forEach((i) => { i.onclick = () => i.classList.toggle("is-checked"); });
  }

  it("重現 BUG：mockup 的 item.onclick 與 app handler 同時觸發 → 多選互相抵消", () => {
    const p = buildPane();
    applyMockupOnclick(p);   // mockup 先設 onclick
    attachHandler(p);        // app.js 委派 handler（未清 onclick）
    const item = findGroup(p, "事件類型").querySelector(".facet-item.is-checked");
    item.querySelector(".facet-item__name").dispatchEvent(new MouseEvent("click", { bubbles: true }));
    expect(item.classList.contains("is-checked")).toBe(true);  // onclick toggle回 + app toggle掉 → 抵消(重現)
  });

  it("修法：清掉 mockup 的 item.onclick 後 → 多選可正常取消", () => {
    const p = buildPane();
    applyMockupOnclick(p);
    p.querySelectorAll(".facet-item").forEach((it) => { it.onclick = null; });  // ← wireAuditPane 的修法
    attachHandler(p);
    const item = findGroup(p, "事件類型").querySelector(".facet-item.is-checked");
    item.querySelector(".facet-item__name").dispatchEvent(new MouseEvent("click", { bubbles: true }));
    expect(item.classList.contains("is-checked")).toBe(false);  // ✅ 正常取消
  });

  it("單選(時間範圍)即使有 mockup onclick 也正常（app 的 remove-all+add 覆蓋）", () => {
    const p = buildPane();
    applyMockupOnclick(p);
    attachHandler(p);  // 不清 onclick，驗證單選為何看似正常
    const items = findGroup(p, "時間範圍").querySelectorAll(".facet-item");
    items[1].querySelector(".facet-item__name").dispatchEvent(new MouseEvent("click", { bubbles: true }));
    // mockup toggle 近30天→checked; app remove-all 後 add 近30天 → 仍 checked（單選結果一致）
    expect(items[1].classList.contains("is-checked")).toBe(true);
  });
});