const CATEGORY_NAMES = {
  office: "办公效率",
  dev: "开发工具",
  media: "影音娱乐",
  security: "安全系统",
  network: "网络工具",
  tools: "系统工具",
};

const els = {
  token: document.querySelector("#admin-token"),
  saveToken: document.querySelector("#save-token"),
  tokenStatus: document.querySelector("#token-status"),
  form: document.querySelector("#software-form"),
  formTitle: document.querySelector("#form-title"),
  formStatus: document.querySelector("#form-status"),
  submitButton: document.querySelector("#submit-button"),
  resetForm: document.querySelector("#reset-form"),
  reload: document.querySelector("#reload-admin"),
  list: document.querySelector("#admin-list"),
  summary: document.querySelector("#admin-summary"),
};

let softwareItems = [];

function escapeHtml(value = "") {
  return String(value)
    .replace(/&/g, "&")
    .replace(/</g, "&lt;")
    .replace(/>/g, "&gt;")
    .replace(/"/g, "&quot;")
    .replace(/'/g, "&#39;");
}

function getToken() {
  return localStorage.getItem("sumiSoftwareAdminToken") || "";
}

function setStatus(element, message, type = "") {
  element.textContent = message;
  element.classList.toggle("is-error", type === "error");
  element.classList.toggle("is-ok", type === "ok");
}

function getInitial(name = "") {
  return Array.from(name.trim())[0]?.toUpperCase() || "S";
}

function iconMarkup(item) {
  if (item.iconUrl) {
    return `<span class="app-icon"><img src="${escapeHtml(item.iconUrl)}" alt="${escapeHtml(item.name)}" onerror="this.remove(); this.parentElement.textContent='${escapeHtml(getInitial(item.name))}'" /></span>`;
  }
  return `<span class="app-icon" aria-hidden="true">${escapeHtml(getInitial(item.name))}</span>`;
}

function normalizeItems(payload) {
  const items = Array.isArray(payload) ? payload : payload?.items;
  return (items || []).map((item) => ({
    ...item,
    tags: Array.isArray(item.tags) ? item.tags : [],
  }));
}

function formatDate(value) {
  if (!value) return "--";
  const date = new Date(value);
  if (Number.isNaN(date.getTime())) return "--";
  return date.toLocaleString("zh-CN", { hour12: false });
}

function renderList() {
  els.summary.textContent = `共 ${softwareItems.length} 款软件`;
  els.list.innerHTML = softwareItems.map((item) => `<article class="admin-item">
    ${iconMarkup(item)}
    <div>
      <div class="app-name-line">
        <h3 class="app-name">${escapeHtml(item.name)}</h3>
        <span class="version-pill">v${escapeHtml(item.version || "-")}</span>
        <span class="category-pill">${escapeHtml(CATEGORY_NAMES[item.category] || "其他")}</span>
      </div>
      <p class="app-desc">${escapeHtml(item.description || "暂无简介")}</p>
      <div class="app-meta">
        <span>${item.active === false ? "已隐藏" : "前台显示"}</span>
        <span>${item.featured ? "精选" : "普通"}</span>
        <span>${escapeHtml(item.size || "未知大小")}</span>
        <span>${formatDate(item.updatedAt)}</span>
      </div>
    </div>
    <div class="admin-item-actions">
      <button class="edit-button" type="button" data-action="edit" data-id="${escapeHtml(item.id)}">编辑</button>
      <button class="danger-button" type="button" data-action="delete" data-id="${escapeHtml(item.id)}">删除</button>
    </div>
  </article>`).join("");
}

async function apiFetch(url, options = {}) {
  const token = getToken();
  const headers = {
    ...(options.headers || {}),
    "X-Admin-Token": token,
  };
  const response = await fetch(url, { ...options, headers });
  if (!response.ok) {
    const message = await response.text();
    throw new Error(message || `HTTP ${response.status}`);
  }
  return response.headers.get("content-type")?.includes("application/json") ? response.json() : response.text();
}

async function loadSoftware() {
  try {
    setStatus(els.tokenStatus, "正在读取软件列表...");
    const payload = await apiFetch("/api/admin/software");
    softwareItems = normalizeItems(payload).sort((a, b) => new Date(b.updatedAt || 0) - new Date(a.updatedAt || 0));
    renderList();
    setStatus(els.tokenStatus, "令牌可用。", "ok");
  } catch (error) {
    softwareItems = [];
    renderList();
    setStatus(els.tokenStatus, `读取失败：${error.message}`, "error");
  }
}

function resetForm() {
  els.form.reset();
  els.form.elements.id.value = "";
  els.form.elements.platform.value = "Windows";
  els.form.elements.publisher.value = "sumi.work";
  els.form.elements.sort.value = "100";
  els.form.elements.active.checked = true;
  els.formTitle.textContent = "新增软件";
  els.submitButton.textContent = "保存软件";
  setStatus(els.formStatus, "");
}

function fillForm(item) {
  els.form.elements.id.value = item.id;
  els.form.elements.name.value = item.name || "";
  els.form.elements.version.value = item.version || "";
  els.form.elements.category.value = item.category || "tools";
  els.form.elements.platform.value = item.platform || "Windows";
  els.form.elements.publisher.value = item.publisher || "sumi.work";
  els.form.elements.homepage.value = item.homepage || "";
  els.form.elements.description.value = item.description || "";
  els.form.elements.changelog.value = item.changelog || "";
  els.form.elements.tags.value = (item.tags || []).join(", ");
  els.form.elements.sort.value = item.sort ?? 100;
  els.form.elements.downloadUrl.value = item.externalDownloadUrl || "";
  els.form.elements.active.checked = item.active !== false;
  els.form.elements.featured.checked = Boolean(item.featured);
  els.form.elements.icon.value = "";
  els.form.elements.package.value = "";
  els.formTitle.textContent = `更新 ${item.name}`;
  els.submitButton.textContent = "更新软件";
  setStatus(els.formStatus, "已载入当前软件，选择新安装包即可发布新版本。", "ok");
  window.scrollTo({ top: 0, behavior: "smooth" });
}

async function saveSoftware(event) {
  event.preventDefault();
  const formData = new FormData(els.form);
  const id = formData.get("id");
  formData.delete("id");

  try {
    setStatus(els.formStatus, "正在保存...");
    const url = id ? `/api/admin/software/${encodeURIComponent(id)}` : "/api/admin/software";
    const method = id ? "PUT" : "POST";
    await apiFetch(url, { method, body: formData });
    setStatus(els.formStatus, id ? "软件已更新。" : "软件已新增。", "ok");
    resetForm();
    await loadSoftware();
  } catch (error) {
    setStatus(els.formStatus, `保存失败：${error.message}`, "error");
  }
}

async function deleteSoftware(id) {
  const item = softwareItems.find((entry) => entry.id === id);
  if (!item || !window.confirm(`确定删除 ${item.name} 吗？`)) return;

  try {
    await apiFetch(`/api/admin/software/${encodeURIComponent(id)}`, { method: "DELETE" });
    setStatus(els.tokenStatus, "软件已删除。", "ok");
    await loadSoftware();
  } catch (error) {
    setStatus(els.tokenStatus, `删除失败：${error.message}`, "error");
  }
}

els.token.value = getToken();
els.saveToken.addEventListener("click", () => {
  localStorage.setItem("sumiSoftwareAdminToken", els.token.value.trim());
  setStatus(els.tokenStatus, "令牌已保存。", "ok");
  loadSoftware();
});

els.reload.addEventListener("click", loadSoftware);
els.resetForm.addEventListener("click", resetForm);
els.form.addEventListener("submit", saveSoftware);
els.list.addEventListener("click", (event) => {
  const button = event.target.closest("button[data-action]");
  if (!button) return;
  const item = softwareItems.find((entry) => entry.id === button.dataset.id);
  if (button.dataset.action === "edit" && item) fillForm(item);
  if (button.dataset.action === "delete") deleteSoftware(button.dataset.id);
});

if (getToken()) {
  loadSoftware();
} else {
  renderList();
  setStatus(els.tokenStatus, "请输入服务端 ADMIN_TOKEN 后读取列表。");
}