(function () {
  var config = Object.assign({
    apiBaseUrl: "http://localhost:9098"
  }, window.VISITOR_LOGIN_CONFIG || {});

  var MAX_PACKAGE_SIZE = 200 * 1024 * 1024;
  var state = {
    pageNum: 1,
    pageSize: 20,
    rows: [],
    mode: "add",
    packageFile: null
  };

  init();

  function init() {
    if (!getToken()) {
      redirectToLogin();
      return;
    }
    bindLayoutActions();
    bindPageActions();
    applyUserInfo(readLoginUser());
    loadProfileName();
    loadVersions();
  }

  function bindLayoutActions() {
    var userMenuButton = document.getElementById("userMenuButton");
    var userDropdown = document.getElementById("userDropdown");
    var fullscreenButton = document.querySelector(".icon-button");

    userMenuButton.addEventListener("click", function (event) {
      event.stopPropagation();
      var hidden = userDropdown.hidden;
      userDropdown.hidden = !hidden;
      userMenuButton.setAttribute("aria-expanded", String(hidden));
    });

    userDropdown.addEventListener("click", function (event) {
      var action = event.target.getAttribute("data-action");
      if (!action) {
        return;
      }
      userDropdown.hidden = true;
      userMenuButton.setAttribute("aria-expanded", "false");
      if (action === "home") {
        window.location.href = "./dashboard.html";
      } else if (action === "logout") {
        logout();
      }
    });

    document.addEventListener("click", function () {
      userDropdown.hidden = true;
      userMenuButton.setAttribute("aria-expanded", "false");
    });

    fullscreenButton.addEventListener("click", function () {
      if (!document.fullscreenElement && document.documentElement.requestFullscreen) {
        document.documentElement.requestFullscreen();
      } else if (document.exitFullscreen) {
        document.exitFullscreen();
      }
    });
  }

  function bindPageActions() {
    var uploadDrop = document.getElementById("uploadDrop");
    var packageFile = document.getElementById("packageFile");
    var versionNoInput = document.getElementById("versionNo");

    document.getElementById("addVersionButton").addEventListener("click", openAddModal);
    document.getElementById("versionForm").addEventListener("submit", function (event) {
      event.preventDefault();
      if (state.mode === "view") {
        closeModal();
        return;
      }
      saveVersion();
    });

    versionNoInput.addEventListener("input", function () {
      versionNoInput.value = versionNoInput.value.replace(/[^\d.]/g, "").replace(/\.{2,}/g, ".");
    });

    document.querySelectorAll("[data-close='version']").forEach(function (button) {
      button.addEventListener("click", closeModal);
    });

    uploadDrop.addEventListener("click", function () {
      if (state.mode !== "view") {
        packageFile.click();
      }
    });

    packageFile.addEventListener("change", function () {
      var file = packageFile.files && packageFile.files[0];
      setPackageFile(file);
    });

    uploadDrop.addEventListener("dragover", function (event) {
      if (state.mode === "view") {
        return;
      }
      event.preventDefault();
      uploadDrop.classList.add("drag-over");
    });

    uploadDrop.addEventListener("dragleave", function () {
      uploadDrop.classList.remove("drag-over");
    });

    uploadDrop.addEventListener("drop", function (event) {
      if (state.mode === "view") {
        return;
      }
      event.preventDefault();
      uploadDrop.classList.remove("drag-over");
      setPackageFile(event.dataTransfer.files && event.dataTransfer.files[0]);
    });
  }

  function loadProfileName() {
    apiRequest("/system/user/profile", { method: "GET" }).then(function (result) {
      applyUserInfo(result.data || {});
    }).catch(function () {
      applyUserInfo(readLoginUser());
    });
  }

  function loadVersions() {
    apiRequest("/system/version/update/page", {
      method: "POST",
      body: JSON.stringify({
        pageNum: state.pageNum,
        pageSize: state.pageSize
      })
    }).then(function (result) {
      var data = result.data || {};
      state.rows = data.records || data.list || [];
      renderTable();
    }).catch(function (error) {
      state.rows = [];
      renderTable();
      AppMessage.error("操作失败：" + (error.message || "版本更新列表加载失败"));
    });
  }

  function renderTable() {
    var body = document.getElementById("versionTableBody");
    var emptyState = document.getElementById("emptyState");
    emptyState.hidden = state.rows.length > 0;
    body.innerHTML = state.rows.map(function (item, index) {
      var rowIndex = (state.pageNum - 1) * state.pageSize + index + 1;
      return [
        '<tr>',
        '  <td>' + rowIndex + '</td>',
        '  <td>' + escapeHtml(item.versionNo || "-") + '</td>',
        '  <td class="version-content-cell">',
        '    <span class="version-content-text">' + escapeHtml(item.updateContent || "-") + '</span>',
        '  </td>',
        '  <td>' + escapeHtml(item.createTime || "-") + '</td>',
        '  <td><div class="table-actions">',
        '    <button type="button" data-action="view" data-id="' + item.updateId + '">查看</button>',
        '    <button type="button" data-action="delete" data-id="' + item.updateId + '">删除</button>',
        '  </div></td>',
        '</tr>'
      ].join("");
    }).join("");

    body.querySelectorAll("[data-action]").forEach(function (button) {
      button.addEventListener("click", function () {
        var action = button.getAttribute("data-action");
        var updateId = Number(button.getAttribute("data-id"));
        if (action === "view") {
          viewVersion(updateId);
        } else if (action === "delete") {
          confirmDelete(updateId);
        }
      });
    });
  }

  function openAddModal() {
    state.mode = "add";
    state.packageFile = null;
    document.getElementById("versionModalTitle").textContent = "新建";
    document.getElementById("versionForm").classList.remove("readonly");
    document.getElementById("versionForm").reset();
    document.getElementById("forceUpdate").checked = true;
    document.getElementById("saveVersionButton").hidden = false;
    setFormReadonly(false);
    updatePackageTip();
    openModal();
  }

  function viewVersion(updateId) {
    apiRequest("/system/version/update/detail", {
      method: "POST",
      body: JSON.stringify({ updateId: updateId })
    }).then(function (result) {
      var data = result.data || {};
      state.mode = "view";
      state.packageFile = null;
      document.getElementById("versionModalTitle").textContent = "查看";
      document.getElementById("versionForm").classList.add("readonly");
      document.getElementById("versionNo").value = removeVersionPrefix(data.versionNo || "");
      document.getElementById("updateContent").value = data.updateContent || "";
      document.getElementById("forceUpdate").checked = !!data.forceUpdate;
      document.getElementById("saveVersionButton").hidden = true;
      setFormReadonly(true);
      updatePackageTip(data.packageName || data.packageUrl || "未上传安装包");
      openModal();
    }).catch(function (error) {
      AppMessage.error("操作失败：" + (error.message || "版本详情加载失败"));
    });
  }

  function confirmDelete(updateId) {
    AppConfirm.open({
      title: "是否确认删除数据？",
      message: "删除操作不可撤回，请谨慎操作",
      onConfirm: function () {
        return apiRequest("/system/version/update/delete", {
          method: "POST",
          body: JSON.stringify({ updateIds: [updateId] })
        }).then(function () {
          AppMessage.success("操作成功");
          loadVersions();
        });
      }
    });
  }

  function saveVersion() {
    var saveButton = document.getElementById("saveVersionButton");
    var versionNumber = document.getElementById("versionNo").value.trim();
    var updateContent = document.getElementById("updateContent").value.trim();

    if (!versionNumber) {
      AppMessage.error("操作失败：请输入版本号");
      return;
    }
    if (!/^\d+(\.\d+)*$/.test(versionNumber)) {
      AppMessage.error("操作失败：版本号格式不正确，请输入数字或使用小数点分隔");
      return;
    }
    if (!updateContent) {
      AppMessage.error("操作失败：请输入更新内容");
      return;
    }
    if (!state.packageFile) {
      AppMessage.error("操作失败：请上传安装包");
      return;
    }
    if (isPackageTooLarge(state.packageFile)) {
      AppMessage.error("操作失败：安装包大小必须小于200M");
      return;
    }

    saveButton.disabled = true;
    uploadPackage().then(function (fileInfo) {
      return apiRequest("/system/version/update/add", {
        method: "POST",
        body: JSON.stringify({
          versionNo: normalizeVersionNo(versionNumber),
          updateContent: updateContent,
          packageUrl: fileInfo.url || fileInfo.fileName || "",
          packageName: fileInfo.originalFilename || fileInfo.newFileName || state.packageFile.name,
          forceUpdate: document.getElementById("forceUpdate").checked
        })
      });
    }).then(function () {
      closeModal();
      AppMessage.success("操作成功");
      loadVersions();
    }).catch(function (error) {
      AppMessage.error("操作失败：" + (error.message || "版本更新保存失败"));
    }).then(function () {
      saveButton.disabled = false;
    });
  }

  function uploadPackage() {
    if (isPackageTooLarge(state.packageFile)) {
      return Promise.reject(new Error("安装包大小必须小于200M"));
    }
    var formData = new FormData();
    formData.append("file", state.packageFile);
    return apiRequest("/system/version/update/upload", {
      method: "POST",
      body: formData,
      skipJson: true
    });
  }

  function setPackageFile(file) {
    if (!file) {
      state.packageFile = null;
      updatePackageTip();
      return;
    }
    if (isPackageTooLarge(file)) {
      state.packageFile = null;
      document.getElementById("packageFile").value = "";
      updatePackageTip();
      AppMessage.error("操作失败：安装包大小必须小于200M");
      return;
    }
    state.packageFile = file;
    updatePackageTip(file.name);
  }

  function isPackageTooLarge(file) {
    return !!file && file.size >= MAX_PACKAGE_SIZE;
  }

  function updatePackageTip(fileName) {
    var uploadDrop = document.getElementById("uploadDrop");
    var text = fileName || "请上传安装包文件，大小须小于200M";
    document.getElementById("packageTip").textContent = text;
    uploadDrop.classList.toggle("has-file", !!fileName);
    uploadDrop.querySelector("span").innerHTML = fileName
      ? '<strong>' + escapeHtml(fileName) + '</strong>'
      : '<strong>点击上传</strong><i>/</i>拖拽到此区域';
  }

  function setFormReadonly(readonly) {
    document.getElementById("versionNo").disabled = readonly;
    document.getElementById("updateContent").disabled = readonly;
    document.getElementById("forceUpdate").disabled = readonly;
  }

  function openModal() {
    document.getElementById("versionModal").hidden = false;
  }

  function closeModal() {
    document.getElementById("versionModal").hidden = true;
  }

  function apiRequest(path, options) {
    options = options || {};
    var headers = options.headers || {};
    var token = getToken();
    if (token) {
      headers.Authorization = "Bearer " + token;
    }
    if (!options.skipJson) {
      headers["Content-Type"] = "application/json";
    }

    return fetch(getApiBaseUrl() + normalizePath(path), {
      method: options.method || "GET",
      headers: headers,
      body: options.body
    }).then(function (response) {
      return response.json().catch(function () {
        return { code: response.ok ? 200 : response.status, msg: response.statusText };
      });
    }).then(function (result) {
      if (result.code === 401) {
        clearLoginState();
        redirectToLogin();
        throw new Error(result.msg || "登录状态已过期");
      }
      if (result.code !== 200) {
        throw new Error(result.msg || "请求失败");
      }
      return result;
    });
  }

  function logout() {
    apiRequest("/logout", {
      method: "POST",
      skipJson: true
    }).catch(function () {
      return null;
    }).then(function () {
      clearLoginState();
      redirectToLogin();
    });
  }

  function applyUserInfo(user) {
    user = user || {};
    var displayName = user.nickName || user.userName || user.username || "用户";
    document.getElementById("userDisplayName").textContent = displayName;
    document.querySelector(".user-avatar").textContent = displayName.substring(0, 1);
  }

  function readLoginUser() {
    try {
      var loginResult = JSON.parse(localStorage.getItem("visitor_admin_login_result") || "{}");
      return (loginResult.userInfo && loginResult.userInfo.user) || loginResult.user || {};
    } catch (error) {
      return {};
    }
  }

  function normalizeVersionNo(value) {
    var text = String(value || "").trim();
    if (!text) {
      return "";
    }
    return /^v/i.test(text) ? text : "v" + text;
  }

  function removeVersionPrefix(value) {
    return String(value || "").replace(/^v/i, "");
  }

  function shortDate(value) {
    return value ? String(value).slice(0, 10).replace(/-/g, ".") : "-";
  }

  function getApiBaseUrl() {
    return trimRightSlash(localStorage.getItem("visitor_admin_api_base") || config.apiBaseUrl || window.location.origin);
  }

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

  function clearLoginState() {
    localStorage.removeItem("visitor_admin_token");
    localStorage.removeItem("visitor_admin_login_result");
    localStorage.removeItem("visitor_admin_api_base");
  }

  function redirectToLogin() {
    window.location.href = "../index.html";
  }

  function normalizePath(path) {
    return "/" + String(path || "").replace(/^\/+/, "");
  }

  function trimRightSlash(value) {
    return String(value || "").replace(/\/+$/, "");
  }

  function escapeHtml(value) {
    return String(value == null ? "" : value).replace(/[&<>"']/g, function (char) {
      return {
        "&": "&amp;",
        "<": "&lt;",
        ">": "&gt;",
        '"': "&quot;",
        "'": "&#39;"
      }[char];
    });
  }
})();