const { getModule, isModuleEnabled } = require("./modules");

function getActiveClassId() {
  const app = getApp();
  const user = app.globalData.user || wx.getStorageSync("auth_user");
  return app.globalData.activeClassId || user?.active_membership?.class_id || user?.memberships?.[0]?.class_id || null;
}

function getEnabledModules() {
  const app = getApp();
  const user = app.globalData.user || wx.getStorageSync("auth_user");
  return app.globalData.enabledModules || user?.enabled_modules || null;
}

function getActiveClassName() {
  const app = getApp();
  const user = app.globalData.user || wx.getStorageSync("auth_user");
  const classId = getActiveClassId();
  const savedClass = wx.getStorageSync("active_class") || null;
  if (savedClass?.id === classId && savedClass?.name) return savedClass.name;
  const membership = user?.memberships?.find((item) => item.class_id === classId);
  return membership?.class_name || user?.active_membership?.class_name || "HKU ICB";
}

function ensureModuleOpen(moduleKey) {
  const enabledModules = getEnabledModules();
  if (isModuleEnabled(moduleKey, enabledModules)) return true;
  const module = getModule(moduleKey);
  wx.redirectTo({
    url: `/pages/module-unavailable/index?title=${encodeURIComponent(module?.title || "功能")}`
  });
  return false;
}

function showError(error, fallback = "加载失败") {
  wx.showToast({
    title: error?.message || fallback,
    icon: "none"
  });
}

module.exports = {
  ensureModuleOpen,
  getActiveClassId,
  getActiveClassName,
  getEnabledModules,
  showError
};