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

  var params = new URLSearchParams(window.location.search);
  var state = {
    mode: params.get("mode") || "add",
    roleId: Number(params.get("roleId") || 0),
    permissionTree: [],
    checkedMenuIds: [],
    nodeMap: {}
  };

  init();

  function init() {
    if (!getToken()) {
      redirectToLogin();
      return;
    }
    bindLayoutActions();
    bindPageActions();
    applyUserInfo(readLoginUser());
    loadProfileName();
    applyMode();
    loadPermissionTree().then(function () {
      if (state.mode === "edit" || state.mode === "detail") {
        loadRoleDetail();
      } else {
        renderPermissionTable();
      }
    });
  }

  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() {
    document.getElementById("backButton").addEventListener("click", goBack);
    document.getElementById("cancelButton").addEventListener("click", goBack);
    document.getElementById("roleForm").addEventListener("submit", function (event) {
      event.preventDefault();
      saveRole();
    });
  }

  function applyMode() {
    var title = "新增角色";
    if (state.mode === "edit") {
      title = "编辑角色";
    } else if (state.mode === "detail") {
      title = "角色详情";
    }
    document.title = title + " - 访客机自助登记管理平台";
    document.getElementById("pageTitle").textContent = title;
    document.getElementById("pageTab").textContent = title;
    document.getElementById("formActions").hidden = state.mode === "detail";
    document.getElementById("detailPermissionTab").hidden = state.mode !== "detail";
    setReadonly(state.mode === "detail");
  }

  function setReadonly(readonly) {
    document.getElementById("roleName").disabled = readonly;
    document.getElementById("roleRemark").disabled = readonly;
  }

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

  function loadPermissionTree() {
    return apiRequest("/system/role/manage/permissionTree", {
      method: "POST",
      body: JSON.stringify({})
    }).then(function (result) {
      state.permissionTree = Array.isArray(result.data) ? result.data : [];
      buildNodeMap(state.permissionTree);
    }).catch(function () {
      state.permissionTree = [];
      state.nodeMap = {};
    });
  }

  function loadRoleDetail() {
    if (!state.roleId) {
      AppMessage.error("操作失败：角色ID不能为空");
      return;
    }
    apiRequest("/system/role/manage/detail", {
      method: "POST",
      body: JSON.stringify({ roleId: state.roleId })
    }).then(function (result) {
      var data = result.data || {};
      document.getElementById("roleName").value = data.roleName || "";
      document.getElementById("roleRemark").value = data.remark || "";
      state.checkedMenuIds = Array.isArray(data.menuIds) ? data.menuIds.map(Number) : [];
      renderPermissionTable();
    }).catch(function (error) {
      AppMessage.error("操作失败：" + (error.message || "角色详情加载失败"));
      renderPermissionTable();
    });
  }

  function renderPermissionTable() {
    var body = document.getElementById("permissionTableBody");
    var empty = document.getElementById("permissionEmpty");
    var rows = buildPermissionRows(state.permissionTree);
    empty.hidden = rows.length > 0;
    body.innerHTML = rows.map(function (row, index) {
      var moduleCell = "";
      if (row.moduleFirst) {
        moduleCell = '<td rowspan="' + row.moduleRowspan + '">' + renderCheck(row.module) + "</td>";
      }
      return [
        "<tr>",
        moduleCell,
        "<td>" + renderCheck(row.page) + "</td>",
        "<td>" + row.actions.map(renderCheck).join("") + "</td>",
        "</tr>"
      ].join("");
    }).join("");

    body.querySelectorAll("input[type='checkbox']").forEach(function (input) {
      input.addEventListener("change", function () {
        syncRelatedChecks(input);
      });
    });
  }

  function buildPermissionRows(tree) {
    var rows = [];
    tree.forEach(function (module) {
      var pageRows = buildModuleRows(module);
      pageRows.forEach(function (row, index) {
        row.moduleFirst = index === 0;
        row.moduleRowspan = pageRows.length;
        rows.push(row);
      });
    });
    return rows;
  }

  function buildModuleRows(module) {
    var children = Array.isArray(module.children) ? module.children : [];
    var pages = children.filter(function (child) {
      return child.menuType !== "F";
    });
    if (!pages.length) {
      pages = [module];
    }
    return pages.map(function (page) {
      var actionChildren = (page.children || []).filter(function (child) {
        return child.menuType === "F";
      });
      var actions = actionChildren.length ? actionChildren : [page];
      return {
        module: toCheckItem(module),
        page: toCheckItem(page),
        actions: actions.map(toCheckItem)
      };
    });
  }

  function renderCheck(item) {
    var checked = item.id && state.checkedMenuIds.indexOf(Number(item.id)) > -1;
    var disabled = state.mode === "detail" || !item.id;
    return [
      '<label class="permission-check">',
      '<input type="checkbox" value="' + (item.id || "") + '" data-parent-id="' + (item.parentId || "") + '"' + (checked ? " checked" : "") + (disabled ? " disabled" : "") + ">",
      "<span>" + escapeHtml(item.name || "-") + "</span>",
      "</label>"
    ].join("");
  }

  function toCheckItem(node) {
    return {
      id: node && node.menuId ? Number(node.menuId) : null,
      parentId: node && node.parentId ? Number(node.parentId) : null,
      name: node && node.menuName ? node.menuName : "-"
    };
  }

  function syncRelatedChecks(input) {
    var id = Number(input.value || 0);
    if (!id) {
      return;
    }
    document.querySelectorAll('input[value="' + id + '"]').forEach(function (sameInput) {
      sameInput.checked = input.checked;
    });
    if (input.checked) {
      checkParents(id);
      return;
    }
    uncheckChildren(id);
  }

  function checkParents(id) {
    var node = state.nodeMap[id];
    while (node && node.parentId) {
      document.querySelectorAll('input[value="' + node.parentId + '"]').forEach(function (parentInput) {
        parentInput.checked = true;
      });
      node = state.nodeMap[node.parentId];
    }
  }

  function uncheckChildren(id) {
    Object.keys(state.nodeMap).forEach(function (key) {
      var node = state.nodeMap[key];
      if (isDescendant(Number(key), id)) {
        document.querySelectorAll('input[value="' + key + '"]').forEach(function (item) {
          item.checked = false;
        });
      }
    });
  }

  function isDescendant(childId, parentId) {
    var node = state.nodeMap[childId];
    while (node && node.parentId) {
      if (Number(node.parentId) === Number(parentId)) {
        return true;
      }
      node = state.nodeMap[node.parentId];
    }
    return false;
  }

  function buildNodeMap(tree) {
    state.nodeMap = {};
    walkNodes(tree, null);
  }

  function walkNodes(nodes, parentId) {
    (nodes || []).forEach(function (node) {
      var menuId = Number(node.menuId || 0);
      if (!node.parentId && parentId) {
        node.parentId = parentId;
      }
      if (menuId) {
        state.nodeMap[menuId] = node;
      }
      walkNodes(node.children || [], menuId);
    });
  }

  function saveRole() {
    if (state.mode === "detail") {
      return;
    }
    var roleName = document.getElementById("roleName").value.trim();
    if (!roleName) {
      AppMessage.error("操作失败：请输入角色名称");
      return;
    }
    var payload = {
      roleName: roleName,
      remark: document.getElementById("roleRemark").value.trim(),
      menuIds: getCheckedMenuIds()
    };
    var path = "/system/role/manage/add";
    if (state.mode === "edit") {
      payload.roleId = state.roleId;
      path = "/system/role/manage/edit";
    }
    var button = document.getElementById("saveRoleButton");
    button.disabled = true;
    apiRequest(path, {
      method: "POST",
      body: JSON.stringify(payload)
    }).then(function () {
      AppMessage.success("操作成功");
      window.setTimeout(goBack, 450);
    }).catch(function (error) {
      AppMessage.error("操作失败：" + (error.message || "角色保存失败"));
    }).then(function () {
      button.disabled = false;
    });
  }

  function getCheckedMenuIds() {
    var ids = [];
    document.querySelectorAll("#permissionTableBody input[type='checkbox']:checked").forEach(function (input) {
      var value = Number(input.value || 0);
      if (value && ids.indexOf(value) === -1) {
        ids.push(value);
      }
    });
    return ids;
  }

  function goBack() {
    window.location.href = "./role-management.html";
  }

  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 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];
    });
  }
})();