import {
  Activity,
  Building2,
  Calendar,
  ChartNoAxesColumn,
  ClipboardList,
  Code,
  BookOpen,
  FileText,
  Files,
  Folder,
  Gauge,
  GitBranch,
  Home,
  Layers3,
  ListFilter,
  MessageSquareText,
  Settings,
  ShieldCheck,
  Users,
  Wrench,
} from "lucide-react";
import type { ComponentType } from "react";
import type { OperationsRole } from "~/features/operations/operationsRole";

export type ActivePage = "home" | "scripts" | "schedules" | "operations" | "system";
export type SubPage =
  | "users"
  | "projects"
  | "roles"
  | "usage"
  | "models"
  | "banks"
  | "deployed-models"
  | "monitoring"
  | "reports"
  | "report-summary"
  | "workflows"
  | "knowledge"
  | "rules"
  | "prompts"
  | "settings";

export type NavigationItem = {
  /** 菜单显示名 */
  label: string;
  /** 渲染在菜单前的图标组件（lucide-react 或等价） */
  icon: ComponentType;
  /** 入口页 — 点击后由 guardedNavigate 处理 */
  page: ActivePage;
  /** 子页段，仅 children 项使用 */
  sub?: SubPage;
  /** 命中高亮的 pathname；不填则按 pathForPage(page) 派生 */
  activePath?: string;
  /** 子菜单点击后直达的路径；用于跨域工作台入口 */
  targetPath?: string;
  /** 当前端可访问的权限码；未配置时视为所有人可访问 */
  permission?: string;
  /** 运维域登录角色适配，仅用于界面展示，不承担权限管理 */
  visibleToOperationsRoles?: OperationsRole[];
  /** 子菜单条目 */
  children?: NavigationItem[];
};

export function pathForPage(page: ActivePage): string {
  if (page === "home") return "/workbench";
  return `/${page}`;
}

function normalizePath(pathname: string): string {
  const trimmed = pathname.replace(/\/+$/, "");
  return trimmed || "/";
}

/** 根据当前 pathname 解析顶栏标题：二级菜单显示子项名称，一级菜单显示自身名称。 */
export function pageTitleFromPath(pathname: string): string {
  const path = normalizePath(pathname);

  for (const item of navigation) {
    if (item.children) {
      for (const child of item.children) {
        const childPath =
          child.activePath ?? `${pathForPage(child.page)}/${child.sub}`;
        if (path === childPath) {
          return child.label;
        }
      }
    }
  }

  for (const item of navigation) {
    const itemPath = item.activePath ?? pathForPage(item.page);
    if (path === itemPath) {
      return item.label;
    }
  }

  return "工作台";
}

export const navigation: NavigationItem[] = [
  {
    label: "工作台",
    icon: Home,
    page: "home",
    children: [
      { label: "开发工作台", icon: Home, page: "home", activePath: "/workbench", targetPath: "/workbench" },
      { label: "运维工作台", icon: Gauge, page: "operations", activePath: "/operations", targetPath: "/operations", permission: "operations:workbench:view", visibleToOperationsRoles: ["business", "model", "admin"] },
      { label: "平台使用统计", icon: ChartNoAxesColumn, page: "operations", activePath: "/operations/usage", targetPath: "/operations/usage", permission: "operations:usage:view", visibleToOperationsRoles: ["admin"] },
    ],
  },
  { label: "构建脚本", icon: Code,     page: "scripts",   permission: "script:view" },
  { label: "调度配置", icon: Calendar, page: "schedules", permission: "schedule:view" },
  {
    label: "上线管理域",
    icon: Layers3,
    page: "operations",
    children: [
      { label: "模型大类概览", icon: Layers3, page: "operations", sub: "models", activePath: "/operations/models", permission: "operations:model-overview:view", visibleToOperationsRoles: ["business", "model", "admin"] },
      { label: "细分银行概览", icon: Building2, page: "operations", sub: "banks", activePath: "/operations/banks", permission: "operations:bank-overview:view", visibleToOperationsRoles: ["business", "model", "admin"] },
      { label: "已上线模型详情", icon: ClipboardList, page: "operations", sub: "deployed-models", activePath: "/operations/deployed-models", permission: "operations:deployed-models:view", visibleToOperationsRoles: ["model", "admin"] },
    ],
  },
  {
    label: "监控运维域",
    icon: Activity,
    page: "operations",
    children: [
      { label: "监控明细", icon: ListFilter, page: "operations", sub: "monitoring", activePath: "/operations/monitoring", permission: "operations:monitoring-overview:view", visibleToOperationsRoles: ["business", "model", "admin"] },
      { label: "监控诊断报告", icon: FileText, page: "operations", sub: "reports", activePath: "/operations/reports", permission: "operations:report:view", visibleToOperationsRoles: ["business", "model", "admin"] },
      { label: "历史报告汇总", icon: Files, page: "operations", sub: "report-summary", activePath: "/operations/report-summary", permission: "operations:report-summary:view", visibleToOperationsRoles: ["business", "model", "admin"] },
    ],
  },
  {
    label: "开发评审域",
    icon: GitBranch,
    page: "operations",
    children: [
      { label: "全流程进度", icon: GitBranch, page: "operations", sub: "workflows", activePath: "/operations/workflows", permission: "operations:workflow:view", visibleToOperationsRoles: ["business", "model", "admin"] },
      { label: "文档知识库", icon: BookOpen, page: "operations", sub: "knowledge", activePath: "/operations/knowledge", permission: "operations:knowledge:view", visibleToOperationsRoles: ["model", "admin"] },
    ],
  },
  {
    label: "系统管理",
    icon: Settings,
    page: "system",
    children: [
      { label: "用户管理", icon: Users,  page: "system", sub: "users",    permission: "system:user:view" },
      { label: "项目管理", icon: Folder, page: "system", sub: "projects", permission: "system:project:view" },
      { label: "角色管理", icon: ShieldCheck, page: "system", sub: "roles",   permission: "system:role:view" },
      { label: "监控等级规则", icon: ShieldCheck, page: "operations", sub: "rules", activePath: "/operations/rules", permission: "operations:rules:view", visibleToOperationsRoles: ["model", "admin"] },
      { label: "报告 Prompt 管理", icon: MessageSquareText, page: "operations", sub: "prompts", activePath: "/operations/prompts", permission: "operations:prompt:view", visibleToOperationsRoles: ["model", "admin"] },
      { label: "运维系统配置", icon: Wrench, page: "operations", sub: "settings", activePath: "/operations/settings", permission: "operations:settings:view", visibleToOperationsRoles: ["admin"] },
    ],
  },
];