import { Permission, type PermissionCode } from '@lingxi/shared';
import {
  IconApps,
  IconAsset,
  IconCheck,
  IconClock,
  IconCopy,
  IconDelivery,
  IconDocs,
  IconExport,
  IconFilter,
  IconGlobal,
  IconGrid,
  IconHome,
  IconImageAdd,
  IconMaterial,
  IconPlay,
  IconRobot,
  IconScript,
  IconSettings,
  IconShield,
  IconStack,
  IconTask,
  IconUser,
  IconVideo,
  IconView,
} from '@lingxi/ui/icons';
import type { ComponentType } from 'react';

export type NavIcon = ComponentType<{ size?: number | string; className?: string }>;

export interface NavItem {
  key: string;
  label: string;
  path: string;
  icon: NavIcon;
  /** 未配置权限点的菜单对所有登录用户可见 */
  permission?: PermissionCode;
  description?: string;
}

export interface NavModule {
  key: string;
  label: string;
  path: string;
  icon: NavIcon;
  permission?: PermissionCode;
  items: NavItem[];
}

/**
 * 顶部模块菜单 + 左侧功能菜单的唯一配置源（A0-FE-03）。
 * 新增页面时在这里登记；侧边栏与面包屑都从这里派生，禁止在页面内写死导航。
 */
export const NAV_MODULES: readonly NavModule[] = [
  {
    key: 'dashboard',
    label: '工作台',
    path: '/',
    icon: IconHome,
    items: [
      {
        key: 'overview',
        label: '工作台',
        path: '/',
        icon: IconHome,
        description: '今天的生产任务、待审核脚本与最近素材',
      },
    ],
  },
  {
    key: 'scripts',
    label: '脚本',
    path: '/scripts/library',
    icon: IconScript,
    permission: Permission.SCRIPT_READ,
    items: [
      {
        key: 'library',
        label: '脚本库',
        path: '/scripts/library',
        icon: IconDocs,
        permission: Permission.SCRIPT_READ,
        description: '按客户、行业与状态检索已生成脚本',
      },
      {
        key: 'framework-cards',
        label: '要素卡',
        path: '/scripts/framework-cards',
        icon: IconTask,
        permission: Permission.SCRIPT_WRITE,
        description: '维护行业包的要素卡字段与填写规则',
      },
      {
        key: 'templates',
        label: '脚本模板',
        path: '/scripts/templates',
        icon: IconStack,
        permission: Permission.SCRIPT_WRITE,
        description: '结构模板、镜头模板与提示词模板',
      },
      {
        key: 'batch',
        label: '批量生成',
        path: '/scripts/batch',
        icon: IconRobot,
        permission: Permission.SCRIPT_WRITE,
        description: '按要素卡批量生成脚本并排队审核',
      },
      {
        key: 'review',
        label: '脚本审核',
        path: '/scripts/review',
        icon: IconCheck,
        permission: Permission.SCRIPT_REVIEW,
        description: '审核生成结果，标记低质量脚本',
      },
    ],
  },
  {
    key: 'material',
    label: '素材',
    path: '/material/image-compose',
    icon: IconMaterial,
    permission: Permission.MATERIAL_READ,
    items: [
      {
        key: 'image-compose',
        label: '图片合成',
        path: '/material/image-compose',
        icon: IconImageAdd,
        permission: Permission.MATERIAL_RENDER,
        description: 'PSD 套版、抠图与确定性合成',
      },
      {
        key: 'video',
        label: '视频生产',
        path: '/material/video',
        icon: IconVideo,
        permission: Permission.MATERIAL_RENDER,
        description: '逐镜生成、合成与成片预览',
      },
      {
        key: 'tasks',
        label: '生产任务',
        path: '/material/tasks',
        icon: IconTask,
        permission: Permission.MATERIAL_READ,
        description: '任务进度、失败原因与重试',
      },
      {
        key: 'quick-review',
        label: '快筛',
        path: '/material/quick-review',
        icon: IconFilter,
        permission: Permission.MATERIAL_REVIEW,
        description: '按快捷键快速筛选候选素材',
      },
      {
        key: 'preview',
        label: '成片预览',
        path: '/material/preview',
        icon: IconPlay,
        permission: Permission.MATERIAL_READ,
        description: '播放成片并核对规格与标识',
      },
    ],
  },
  {
    key: 'assets',
    label: '资产',
    path: '/assets/library',
    icon: IconAsset,
    permission: Permission.ASSET_READ,
    items: [
      {
        key: 'library',
        label: '资产库',
        path: '/assets/library',
        icon: IconAsset,
        permission: Permission.ASSET_READ,
        description: '图片、视频、音频与模板资产',
      },
      {
        key: 'templates',
        label: '模板库',
        path: '/assets/templates',
        icon: IconCopy,
        permission: Permission.ASSET_READ,
        description: 'PSD 模板与版式配置',
      },
      {
        key: 'pools',
        label: '人物与场景',
        path: '/assets/pools',
        icon: IconUser,
        permission: Permission.ASSET_READ,
        description: '人物、场景与风格池',
      },
      {
        key: 'prompts',
        label: '提示词模板',
        path: '/assets/prompts',
        icon: IconRobot,
        permission: Permission.ASSET_READ,
        description: '视频与图片生成的提示词版本',
      },
    ],
  },
  {
    key: 'delivery',
    label: '交付',
    path: '/delivery/export',
    icon: IconDelivery,
    permission: Permission.DELIVERY_READ,
    items: [
      {
        key: 'export',
        label: '导出任务',
        path: '/delivery/export',
        icon: IconExport,
        permission: Permission.DELIVERY_EXPORT,
        description: '勾选素材导出并按批次归档',
      },
      {
        key: 'records',
        label: '导出记录',
        path: '/delivery/records',
        icon: IconClock,
        permission: Permission.DELIVERY_READ,
        description: '导出批次、签名链接与归档状态',
      },
      {
        key: 'manifests',
        label: '交付清单',
        path: '/delivery/manifests',
        icon: IconTask,
        permission: Permission.DELIVERY_READ,
        description: '交付清单、客户签收与留痕',
      },
    ],
  },
  {
    key: 'system',
    label: '管理中心',
    path: '/system/users',
    icon: IconSettings,
    permission: Permission.USER_VIEW,
    items: [
      {
        key: 'users',
        label: '用户管理',
        path: '/system/users',
        icon: IconUser,
        permission: Permission.USER_VIEW,
        description: '成员账号、部门归属与登录状态',
      },
      {
        key: 'departments',
        label: '部门管理',
        path: '/system/departments',
        icon: IconApps,
        permission: Permission.USER_VIEW,
        description: '两级组织架构、负责人、排序与停用状态',
      },
      {
        key: 'roles',
        label: '角色管理',
        path: '/system/roles',
        icon: IconShield,
        permission: Permission.ROLE_VIEW,
        description: '角色、权限点与职责互斥',
      },
      {
        key: 'customers',
        label: '客户',
        path: '/system/customers',
        icon: IconGlobal,
        permission: Permission.CUSTOMER_MANAGE,
        description: '客户、行业归属与数据范围',
      },
      {
        key: 'industries',
        label: '行业树',
        path: '/system/industries',
        icon: IconStack,
        permission: Permission.INDUSTRY_MANAGE,
        description: '行业分类树与行业包绑定',
      },
      {
        key: 'dicts',
        label: '字典',
        path: '/system/dicts',
        icon: IconDocs,
        permission: Permission.DICT_MANAGE,
        description: '核心字典与业务枚举',
      },
      {
        key: 'audit',
        label: '审计日志',
        path: '/system/audit-logs',
        icon: IconView,
        permission: Permission.AUDIT_READ,
        description: '关键操作留痕与导出记录',
      },
      {
        key: 'ai',
        label: '模型接入',
        path: '/system/ai',
        icon: IconRobot,
        permission: Permission.AI_CONFIGURE,
        description: '供应商、路由与预算阈值',
      },
      {
        key: 'settings',
        label: '系统配置',
        path: '/system/settings',
        icon: IconSettings,
        permission: Permission.SYSTEM_CONFIGURE,
        description: '阈值、上限与功能开关',
      },
      {
        key: 'industry-packs',
        label: '行业包',
        path: '/system/industry-packs',
        icon: IconGrid,
        permission: Permission.INDUSTRY_MANAGE,
        description: '行业包版本、发布与灰度',
      },
      {
        key: 'forms',
        label: '表单设计器',
        path: '/system/forms',
        icon: IconGrid,
        permission: Permission.FORM_DESIGN,
        description: '受控字段白名单与表单布局',
      },
      {
        key: 'customer-fields',
        label: '客户字段',
        path: '/system/customer-fields',
        icon: IconTask,
        permission: Permission.CUSTOMER_MANAGE,
        description: '客户级扩展字段与审批',
      },
      {
        key: 'compliance',
        label: '合规规则',
        path: '/system/compliance',
        icon: IconShield,
        permission: Permission.SYSTEM_CONFIGURE,
        description: '禁忌词、极限词与合规规则集',
      },
    ],
  },
];

export function filterNavByPermissions(
  modules: readonly NavModule[],
  permissions: ReadonlySet<string>,
): NavModule[] {
  return modules
    .map((module) => {
      if (module.permission && !permissions.has(module.permission)) {
        return null;
      }
      const items = module.items.filter(
        (item) => item.permission === undefined || permissions.has(item.permission),
      );
      return items.length > 0 ? { ...module, items } : null;
    })
    .filter((module): module is NavModule => module !== null);
}

export function findNavModule(
  modules: readonly NavModule[],
  moduleKey: string,
): NavModule | undefined {
  return modules.find((module) => module.key === moduleKey);
}

export interface ActiveNav {
  module: NavModule;
  item: NavItem | undefined;
}

export function findActiveNav(modules: readonly NavModule[], pathname: string): ActiveNav | null {
  const normalized = pathname !== '/' ? pathname.replace(/\/+$/, '') : pathname;
  for (const module of modules) {
    const item = module.items.find(
      (candidate) =>
        candidate.path === normalized ||
        (candidate.path !== '/' && normalized.startsWith(`${candidate.path}/`)),
    );
    if (item) {
      return { module, item };
    }
  }
  return null;
}

export interface BreadcrumbEntry {
  key: string;
  label: string;
  path?: string;
}

export function getBreadcrumbs(modules: readonly NavModule[], pathname: string): BreadcrumbEntry[] {
  const active = findActiveNav(modules, pathname);
  if (!active) {
    return [{ key: 'home', label: '工作台', path: '/' }];
  }
  const entries: BreadcrumbEntry[] = [{ key: 'home', label: '工作台', path: '/' }];
  if (active.module.key !== 'dashboard') {
    entries.push({ key: active.module.key, label: active.module.label });
  }
  if (active.item && active.item.path !== '/' && active.item.key !== active.module.items[0]?.key) {
    entries.push({ key: active.item.key, label: active.item.label, path: active.item.path });
  } else if (active.item && active.item.path !== '/') {
    entries.push({ key: active.item.key, label: active.item.label, path: active.item.path });
  }
  return entries;
}