import { useCallback, useEffect, useState } from 'react';
import {
  Activity,
  AlertTriangle,
  BarChart3,
  Building2,
  FileCheck2,
  FileText,
  FileSpreadsheet,
  FilePenLine,
  Gauge,
  Hash,
  ImageIcon,
  ListChecks,
  Layers3,
  MessageSquare,
  Phone,
  RefreshCw,
  TrendingUp,
  RadioTower,
  ReceiptText,
  ClipboardList,
  Send,
  ServerCog,
  ScanSearch,
  Settings,
  Shield,
  ShieldOff,
  ShieldCheck,
  Users,
  UserX,
} from 'lucide-react';
import { adminApi, type PendingAuditCounts } from '@/api/adminApi';
import { getLastUserActivityAt, readSession, type LoginSession } from '@/api/session';
import { AppShell } from '@/layouts/AppShell';
import { PortalSessionBoundary } from '@/layouts/PortalSessionBoundary';

const EMPTY_PENDING_AUDITS: Omit<PendingAuditCounts, 'total'> = {
  enterpriseCertifications: 0,
  smsAudits: 0,
  templates: 0,
  signatures: 0,
  drainageInfos: 0,
};

export function AdminLayout() {
  return (
    <PortalSessionBoundary portal="admin">
      {(session) => <AdminAuthenticatedLayout session={session} />}
    </PortalSessionBoundary>
  );
}

function AdminAuthenticatedLayout({ session }: { session: LoginSession }) {
  const [pendingAudits, setPendingAudits] = useState(EMPTY_PENDING_AUDITS);
  const [retirementUnreadCount, setRetirementUnreadCount] = useState(0);
  const [securityAlertSummary, setSecurityAlertSummary] = useState({ count: 0, criticalCount: 0 });
  const [infrastructureAlertSummary, setInfrastructureAlertSummary] = useState({ count: 0, criticalCount: 0 });
  const [sessionLocked, setSessionLocked] = useState(Boolean(session.locked));
  const loadPendingAuditCount = useCallback(() => {
    const currentSession = readSession('admin');
    if (
      !currentSession ||
      currentSession.locked ||
      Date.now() - getLastUserActivityAt() >= currentSession.idleTimeoutSeconds * 1000
    ) {
      return;
    }
    // This runs globally and on a timer, so it must not fan out through the full dashboard aggregation.
    Promise.allSettled([
      adminApi.getPendingAudits(),
      adminApi.getSignatureRetirementUnreadCount(),
      adminApi.getSecurityNotificationSummary(),
      adminApi.getInfrastructureMonitoringNotificationSummary(),
    ])
      .then(([audits, retirement, security, infrastructure]) => {
        setPendingAudits(audits.status === 'fulfilled' ? audits.value : EMPTY_PENDING_AUDITS);
        setRetirementUnreadCount(retirement.status === 'fulfilled' ? retirement.value.count : 0);
        setSecurityAlertSummary(security.status === 'fulfilled' ? security.value : { count: 0, criticalCount: 0 });
        setInfrastructureAlertSummary(
          infrastructure.status === 'fulfilled' ? infrastructure.value : { count: 0, criticalCount: 0 },
        );
      })
      .catch(() => {
        setPendingAudits(EMPTY_PENDING_AUDITS);
        setRetirementUnreadCount(0);
        setSecurityAlertSummary({ count: 0, criticalCount: 0 });
        setInfrastructureAlertSummary({ count: 0, criticalCount: 0 });
      });
  }, []);

  useEffect(() => {
    if (session.portal !== 'admin' || sessionLocked) {
      return;
    }
    loadPendingAuditCount();
    const timer = window.setInterval(loadPendingAuditCount, 30000);
    const onFocus = () => loadPendingAuditCount();
    const onAuditRefresh = () => loadPendingAuditCount();
    window.addEventListener('focus', onFocus);
    window.addEventListener('cmpp-audit-count-refresh', onAuditRefresh);
    window.addEventListener('cmpp-retirement-count-refresh', onAuditRefresh);
    window.addEventListener('cmpp-security-alert-count-refresh', onAuditRefresh);
    window.addEventListener('cmpp-infrastructure-alert-count-refresh', onAuditRefresh);
    return () => {
      window.clearInterval(timer);
      window.removeEventListener('focus', onFocus);
      window.removeEventListener('cmpp-audit-count-refresh', onAuditRefresh);
      window.removeEventListener('cmpp-retirement-count-refresh', onAuditRefresh);
      window.removeEventListener('cmpp-security-alert-count-refresh', onAuditRefresh);
      window.removeEventListener('cmpp-infrastructure-alert-count-refresh', onAuditRefresh);
    };
  }, [loadPendingAuditCount, session.portal, sessionLocked]);

  return (
    <AppShell
      title="CMPP 运营端"
      subtitle="平台运营管理中心"
      workspaceName="平台运营工作区"
      loginPath="/admin/login"
      portal="admin"
      userName={session.user.displayName}
      userRole="平台管理员"
      onSessionLockedChange={setSessionLocked}
      alertNotifications={[
        {
          label: '签名清退预警',
          count: retirementUnreadCount,
          description: '今日未读且未抑制',
          to: '/admin/signature-retirement',
        },
        {
          label: '安全检测与封禁',
          count: securityAlertSummary.count,
          description:
            securityAlertSummary.criticalCount > 0
              ? `${securityAlertSummary.criticalCount} 条严重告警待处置`
              : '待处置安全告警',
          to: '/admin/security-detection',
        },
        {
          label: '系统监控告警',
          count: infrastructureAlertSummary.count,
          description:
            infrastructureAlertSummary.criticalCount > 0
              ? `${infrastructureAlertSummary.criticalCount} 条 Prometheus 严重告警`
              : 'Prometheus 活动告警',
          to: '/admin/system-monitoring#active-alerts',
        },
      ]}
      auditNotifications={[
        { label: '企业认证待审', count: pendingAudits.enterpriseCertifications, to: '/admin/enterprise-audit' },
        { label: '短信审核待审', count: pendingAudits.smsAudits, to: '/admin/sms-audit' },
        { label: '模板待审', count: pendingAudits.templates, to: '/admin/templates' },
        { label: '签名待审', count: pendingAudits.signatures, to: '/admin/signatures' },
        {
          label: '签名导入待审',
          count: pendingAudits.signatureImports ?? 0,
          to: '/admin/signatures?tab=import',
        },
        { label: '引流信息待审', count: pendingAudits.drainageInfos, to: '/admin/drainage-audits' },
      ]}
      navSections={[
        {
          title: '运营概览',
          icon: Gauge,
          items: [
            { label: '运营看板', to: '/admin', icon: Gauge },
            { label: '发送监控', to: '/admin/monitor', icon: Activity },
            { label: '网关异常', to: '/admin/gateway-submit-exceptions', icon: AlertTriangle },
            { label: '签名质量检测', to: '/admin/analytics', icon: BarChart3 },
          ],
        },
        {
          title: '客户管理',
          icon: Building2,
          items: [
            { label: '企业管理', to: '/admin/customer-enterprises', icon: Building2 },
            { label: '企业应用管理', to: '/admin/enterprise-applications', icon: Layers3 },
            { label: '企业签名管理', to: '/admin/enterprise-signatures', icon: FilePenLine },
            { label: '企业模板管理', to: '/admin/enterprise-templates', icon: FileCheck2 },
          ],
        },
        {
          title: '审核中心',
          icon: FileCheck2,
          items: [
            { label: '企业认证审核', to: '/admin/enterprise-audit', icon: ShieldCheck },
            { label: '短信审核', to: '/admin/sms-audit', icon: MessageSquare },
            { label: '短信模板审核', to: '/admin/templates', icon: FileCheck2 },
            { label: '短信签名审核', to: '/admin/signatures', icon: FilePenLine },
            { label: '引流信息审核', to: '/admin/drainage-audits', icon: FilePenLine },
          ],
        },
        {
          title: '通道管理',
          icon: RadioTower,
          items: [
            { label: '短信通道管理', to: '/admin/channels', icon: RadioTower },
            { label: '彩信通道管理', to: '/admin/mms-channels', icon: ImageIcon, pending: true },
            { label: '短信通道组管理', to: '/admin/channel-groups', icon: Layers3 },
          ],
        },
        {
          title: '报备工作台',
          icon: ClipboardList,
          items: [
            { label: '报备资料池', to: '/admin/report-materials', icon: FileSpreadsheet },
            { label: '报备批次', to: '/admin/report-batches', icon: Layers3 },
            { label: '通道报备明细', to: '/admin/report-tasks', icon: ClipboardList },
            { label: '状态记录', to: '/admin/report-records', icon: ListChecks },
          ],
        },
        {
          title: '发送任务',
          icon: Send,
          items: [
            { label: '短信任务进度', to: '/admin/sms-task-progress', icon: TrendingUp },
            { label: '彩信任务进度', to: '/admin/mms-task-progress', icon: BarChart3, pending: true },
          ],
        },
        {
          title: '数据详单',
          icon: ReceiptText,
          items: [
            { label: '短信记录', to: '/admin/sms-records', icon: MessageSquare },
            { label: '彩信记录', to: '/admin/mms-records', icon: ImageIcon, pending: true },
            { label: '短信上行记录', to: '/admin/sms-uplink-records', icon: MessageSquare },
            { label: '下游投递记录', to: '/admin/downstream-deliveries', icon: Send },
            { label: '恢复状态管理', to: '/admin/downstream-recovery-statuses', icon: RefreshCw },
            { label: '充值记录', to: '/admin/recharge-records', icon: ReceiptText },
          ],
        },
        {
          title: '报表对账',
          icon: BarChart3,
          items: [
            { label: '对账单', to: '/admin/reconciliation-reports', icon: ReceiptText },
            { label: '利润报表', to: '/admin/profit-reports', icon: TrendingUp },
            { label: '发送质量报表', to: '/admin/quality-reports', icon: BarChart3 },
          ],
        },
        {
          title: '安全控制',
          icon: Shield,
          items: [
            { label: '风控规则', to: '/admin/risk-rules', icon: Shield },
            { label: '安全检测与封禁', to: '/admin/security-detection', icon: ShieldCheck },
            { label: '签名清退预警', to: '/admin/signature-retirement', icon: AlertTriangle },
            { label: '企业黑名单', to: '/admin/enterprise-blacklist', icon: UserX },
            { label: '全局黑名单', to: '/admin/global-blacklist', icon: ShieldOff },
            { label: '敏感词管理', to: '/admin/sensitive-words', icon: Shield },
          ],
        },
        {
          title: '系统管理',
          icon: Settings,
          items: [
            { label: '用户管理', to: '/admin/users', icon: Users },
            { label: '手机号段库', to: '/admin/phone-segments', icon: Phone },
            { label: '报备字段库', to: '/admin/drainage-fields', icon: Hash },
            { label: '引流识别规则', to: '/admin/drainage-detection-rules', icon: ScanSearch },
            { label: '系统日志', to: '/admin/system-logs', icon: FileText },
            { label: '系统监控', to: '/admin/system-monitoring', icon: ServerCog },
          ],
        },
      ]}
    />
  );
}