import { useState, useEffect } from 'react';
import { useSearchParams } from 'react-router-dom';
import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Switch } from '@/components/ui/switch';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from '@/components/ui/select';
import { Lock, History, Key, Settings, Network, RefreshCw, Loader2 } from 'lucide-react';
import { PageTabs } from '@/components/layout/PageTabs';
import { LdapManagementSection } from './LdapManagementSection';
import type { JsonData } from '@/types/common';
import { useTranslation } from 'react-i18next';
import i18n from '@/i18n';

// 系统设置子 Tab：通用 / 安全 / LDAP // Logan.Li
const SETTINGS_TABS = [
  { id: 'general', label: i18n.t('system.settingsGeneral') },
  { id: 'security', label: i18n.t('system.settingsSecurity') },
  { id: 'ldap', label: 'LDAP' },
] as const;
type SettingsSubTab = (typeof SETTINGS_TABS)[number]['id'];

export interface LdapFormData {
  ldap_host: string;
  ldap_port: number;
  use_ldaps: boolean;
  admin_dn: string;
  admin_password: string;
  base_dn: string;
  search_filter: string;
}

interface SystemSettingsTabProps {
  // 审计策略 // Logan.Li
  auditRetentionDays: string;
  setAuditRetentionDays: (v: string) => void;
  auditRecordAll: boolean;
  setAuditRecordAll: (v: boolean) => void;
  auditLoading: boolean;
  auditApplying: boolean;
  handleAuditApply: () => void;
  auditLastCleanupText: string | null;
  auditRetentionOptions: number[];
  // LDAP config
  ldapConfig: unknown;
  ldapForm: LdapFormData;
  setLdapForm: React.Dispatch<React.SetStateAction<LdapFormData>>;
  ldapSaving: boolean;
  ldapTesting: boolean;
  ldapTestResult: string | null;
  handleLdapSave: () => void;
  handleLdapTest: () => void;
  // LDAP management - pass-through to LdapManagementSection
  ldapMgmtOpen: boolean;
  setLdapMgmtOpen: (v: boolean) => void;
  ldapOUs: unknown[];
  selectedOUDN: string;
  setSelectedOUDN: (v: string) => void;
  ldapUsers: unknown[];
  selectedLDAPUsers: string[];
  setSelectedLDAPUsers: (v: string[]) => void;
  loadLdapOUs: () => void;
  loadLdapOUUsers: (ouDn?: string) => void;
  handleLdapImport: (opts?: { importAll?: boolean }) => void | Promise<void>;
  importing: boolean;
  importFeedback: string | null;
  importResultOpen: boolean;
  setImportResultOpen: (v: boolean) => void;
  createOUOpen: boolean;
  setCreateOUOpen: (v: boolean) => void;
  ouForm: { ou_name: string; parent_dn: string; description: string };
  setOuForm: React.Dispatch<React.SetStateAction<{ ou_name: string; parent_dn: string; description: string }>>;
  handleCreateOU: () => void;
  createUserOpen: boolean;
  setCreateUserOpen: (v: boolean) => void;
  newUser: { username: string; password: string; display_name: string; email: string; ou_dn: string };
  setNewUser: React.Dispatch<React.SetStateAction<{ username: string; password: string; display_name: string; email: string; ou_dn: string }>>;
  handleCreateLDAPUser: () => void;
  ldapUserTestOpen: boolean;
  setLdapUserTestOpen: (v: boolean) => void;
  ldapTestUser: string;
  setLdapTestUser: (v: string) => void;
  ldapTestPass: string;
  setLdapTestPass: (v: string) => void;
  ldapUserTesting: boolean;
  ldapUserTestResult: unknown;
  handleLdapUserTest: () => void;
  editLdapUser: JsonData | null;
  setEditLdapUser: (u: JsonData | null) => void;
  editLdapForm: { cn: string; mail: string; phone: string; title: string };
  setEditLdapForm: React.Dispatch<React.SetStateAction<{ cn: string; mail: string; phone: string; title: string }>>;
  handleUpdateLdapUser: () => void;
  handleDeleteLDAPEntry: (dn: string, silent?: boolean) => void;
  openEditLdapUser: (user: JsonData) => void;
}

export function SystemSettingsTab(props: SystemSettingsTabProps) {
  const { t } = useTranslation();
  const {
    auditRetentionDays,
    setAuditRetentionDays,
    auditRecordAll,
    setAuditRecordAll,
    auditLoading,
    auditApplying,
    handleAuditApply,
    auditLastCleanupText,
    auditRetentionOptions,
    ldapConfig,
    ldapForm,
    setLdapForm,
    ldapSaving,
    ldapTesting,
    ldapTestResult,
    handleLdapSave,
    handleLdapTest,
  } = props;

  const [searchParams, setSearchParams] = useSearchParams();
  const tabFromUrl = searchParams.get('tab') as SettingsSubTab | null;
  const [subTab, setSubTab] = useState<SettingsSubTab>(
    SETTINGS_TABS.some(t => t.id === tabFromUrl) ? tabFromUrl! : 'general',
  );

  useEffect(() => {
    if (tabFromUrl && SETTINGS_TABS.some(t => t.id === tabFromUrl) && tabFromUrl !== subTab) {
      setSubTab(tabFromUrl);
    }
  }, [tabFromUrl, subTab]);

  const changeSubTab = (id: string) => {
    const next = id as SettingsSubTab;
    setSubTab(next);
    const params = new URLSearchParams(searchParams);
    if (next === 'general') params.delete('tab');
    else params.set('tab', next);
    setSearchParams(params, { replace: true });
  };

  return (
    <div className="w-full space-y-4">
      <PageTabs items={[...SETTINGS_TABS]} value={subTab} onChange={changeSubTab} />

      {subTab === 'general' && (
      <div className="grid grid-cols-1 md:grid-cols-2 gap-4 pt-2">
        <Card className="dg-card">
          <CardHeader>
            <CardTitle className="text-[var(--dg-text-primary)] flex items-center gap-2">
              <History className="h-5 w-5 dg-text-green" />
              {t('system.audit')}
            </CardTitle>
            <CardDescription className="dg-text-muted">{t('system.auditSettingsDesc')}</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm font-medium text-[var(--dg-text-primary)]">{t('system.recordAllOps')}</p>
                <p className="text-xs dg-text-muted">{t('system.recordAllOpsDesc')}</p>
              </div>
              <Switch
                checked={auditRecordAll}
                onCheckedChange={setAuditRecordAll}
                disabled={auditLoading || auditApplying}
                className="data-[state=checked]:bg-blue-600"
              />
            </div>
            <div className="flex items-center justify-between gap-3">
              <div className="min-w-0">
                <p className="text-sm font-medium text-[var(--dg-text-primary)]">{t('system.logRetention')}</p>
                <p className="text-xs dg-text-muted">
                  {t('system.logRetentionHint')}
                </p>
                {auditLastCleanupText && (
                  <p className="text-xs dg-text-muted mt-1">{auditLastCleanupText}</p>
                )}
              </div>
              <Select
                value={auditRetentionDays}
                onValueChange={setAuditRetentionDays}
                disabled={auditLoading || auditApplying}
              >
                <SelectTrigger className="w-28 h-8 dg-input shrink-0">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent className="dg-input">
                  {auditRetentionOptions.map((d) => (
                    <SelectItem key={d} value={String(d)}>
                      {d}天
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
            </div>
            <div className="flex justify-end pt-1">
              <Button
                size="sm"
                className="dg-btn-primary"
                onClick={handleAuditApply}
                disabled={auditLoading || auditApplying}
              >
                {auditApplying ? (
                  <>
                    <Loader2 className="h-3.5 w-3.5 mr-1.5 animate-spin" />
                    {t('system.applyingDot')}
                  </>
                ) : (
                  t('common.apply')
                )}
              </Button>
            </div>
          </CardContent>
        </Card>

        <Card className="dg-card">
          <CardHeader>
            <CardTitle className="text-[var(--dg-text-primary)] flex items-center gap-2">
              <Settings className="h-5 w-5 dg-text-purple" />
              {t('system.systemInfo')}
            </CardTitle>
            <CardDescription className="dg-text-muted">{t('system.systemInfoDesc')}</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="flex items-center justify-between">
              <span className="text-sm dg-text-secondary">{t('system.systemVersion')}</span>
              <span className="text-sm text-[var(--dg-text-primary)]">v2.5.1</span>
            </div>
            <div className="flex items-center justify-between">
              <span className="text-sm dg-text-secondary">{t('system.uptime')}</span>
              <span className="text-sm text-[var(--dg-text-primary)]">{t('system.uptimeValue')}</span>
            </div>
          </CardContent>
        </Card>
      </div>
      )}

      {subTab === 'security' && (
      <div className="grid grid-cols-1 md:grid-cols-2 gap-4 pt-2">
        <Card className="dg-card">
          <CardHeader>
            <CardTitle className="text-[var(--dg-text-primary)] flex items-center gap-2">
              <Lock className="h-5 w-5 dg-text-blue" />
              {t('system.security')}
            </CardTitle>
            <CardDescription className="dg-text-muted">{t('system.securityDesc')}</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm font-medium text-[var(--dg-text-primary)]">{t('system.forcePasswordComplexity')}</p>
                <p className="text-xs dg-text-muted">{t('system.forcePasswordComplexityDesc')}</p>
              </div>
              <Switch disabled className="data-[state=checked]:bg-blue-600" />
            </div>
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm font-medium text-[var(--dg-text-primary)]">{t('system.loginLockout')}</p>
                <p className="text-xs dg-text-muted">{t('system.loginLockoutDesc')}</p>
              </div>
              <Switch disabled defaultChecked className="data-[state=checked]:bg-blue-600" />
            </div>
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm font-medium text-[var(--dg-text-primary)]">{t('system.twoFactor')}</p>
                <p className="text-xs dg-text-muted">{t('system.twoFactorDesc')}</p>
              </div>
              <Switch disabled className="data-[state=checked]:bg-blue-600" />
            </div>
          </CardContent>
        </Card>

        <Card className="dg-card">
          <CardHeader>
            <CardTitle className="text-[var(--dg-text-primary)] flex items-center gap-2">
              <Key className="h-5 w-5 dg-text-yellow" />
              {t('system.sessionSettings')}
            </CardTitle>
            <CardDescription className="dg-text-muted">{t('system.sessionSettingsDesc')}</CardDescription>
          </CardHeader>
          <CardContent className="space-y-4">
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm font-medium text-[var(--dg-text-primary)]">{t('system.sessionTimeoutTime')}</p>
                <p className="text-xs dg-text-muted">{t('system.sessionTimeoutDesc')}</p>
              </div>
              <Select defaultValue="30" disabled>
                <SelectTrigger className="w-32 h-8 dg-input">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent className="dg-input">
                  <SelectItem value="15">{t('monitor.traceMgr.min15')}</SelectItem>
                  <SelectItem value="30">30分钟</SelectItem>
                  <SelectItem value="60">{t('monitor.traceMgr.hour1')}</SelectItem>
                  <SelectItem value="120">2小时</SelectItem>
                </SelectContent>
              </Select>
            </div>
            <div className="flex items-center justify-between">
              <div>
                <p className="text-sm font-medium text-[var(--dg-text-primary)]">{t('system.sso')}</p>
                <p className="text-xs dg-text-muted">{t('system.singleSignOnDesc')}</p>
              </div>
              <Switch disabled className="data-[state=checked]:bg-blue-600" />
            </div>
          </CardContent>
        </Card>
      </div>
      )}

      {subTab === 'ldap' && (
      <>
      <Card className="dg-card pt-2">
        <CardHeader>
          <div className="flex items-center justify-between">
            <div>
              <CardTitle className="text-[var(--dg-text-primary)] flex items-center gap-2">
                <Network className="h-5 w-5 dg-text-cyan" />
                LDAP / Active Directory
              </CardTitle>
              <CardDescription className="dg-text-muted mt-1">{t('system.ldapConfigHint')}</CardDescription>
            </div>
          </div>
        </CardHeader>
        <CardContent>
          <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-3 gap-4">
            <div className="space-y-1.5">
              <label className="text-xs dg-text-muted">{t('system.ldapServerAddr')}</label>
              <Input
                value={ldapForm.ldap_host}
                onChange={(e) => setLdapForm({ ...ldapForm, ldap_host: e.target.value })}
                className="dg-input"
                placeholder="ldap.example.com"
              />
            </div>
            <div className="space-y-1.5">
              <label className="text-xs dg-text-muted">{t('system.ldapPort')}</label>
              <Input
                type="number"
                value={ldapForm.ldap_port}
                onChange={(e) => setLdapForm({ ...ldapForm, ldap_port: Number(e.target.value) })}
                className="dg-input"
                placeholder="389"
              />
            </div>
            <div className="space-y-1.5 col-span-2">
              <label className="text-xs dg-text-muted">{t('system.baseDnHint')}</label>
              <Input
                value={ldapForm.base_dn}
                onChange={(e) => setLdapForm({ ...ldapForm, base_dn: e.target.value })}
                className="dg-input"
                placeholder="ou=users,dc=example,dc=com"
              />
            </div>
            <div className="space-y-1.5">
              <label className="text-xs dg-text-muted">{t('system.adminBindDn')}</label>
              <Input
                value={ldapForm.admin_dn}
                onChange={(e) => setLdapForm({ ...ldapForm, admin_dn: e.target.value })}
                className="dg-input"
                placeholder="cn=admin,dc=example,dc=com"
              />
            </div>
            <div className="space-y-1.5">
              <label className="text-xs dg-text-muted">管理员密码 {ldapConfig && t('system.leaveBlankNoModify')}</label>
              <Input
                type="password"
                value={ldapForm.admin_password}
                onChange={(e) => setLdapForm({ ...ldapForm, admin_password: e.target.value })}
                className="dg-input"
                placeholder="******"
              />
            </div>
            <div className="space-y-1.5 col-span-2">
              <label className="text-xs dg-text-muted">{t('system.searchFilterHint')}</label>
              <Input
                value={ldapForm.search_filter}
                onChange={(e) => setLdapForm({ ...ldapForm, search_filter: e.target.value })}
                className="dg-input"
                placeholder="(uid=%s)"
              />
            </div>
            <div className="flex items-center gap-2 col-span-2">
              <Switch
                checked={ldapForm.use_ldaps}
                onCheckedChange={(v) => setLdapForm({ ...ldapForm, use_ldaps: v })}
                className="data-[state=checked]:bg-blue-600"
              />
              <span className="text-sm text-[var(--dg-text-secondary)]">{t('system.enableLdaps')}</span>
            </div>
          </div>

          {/* 测试/保存按钮 */}
          <div className="flex items-center gap-3 mt-4 pt-4 border-t border-[var(--dg-border)]">
            {ldapTestResult && (
              <span className={`text-xs ${ldapTestResult.includes('成功') ? 'dg-text-green' : 'dg-text-red'}`}>
                {ldapTestResult}
              </span>
            )}
            <div className="flex items-center gap-2 ml-auto">
              <Button
                variant="outline"
                size="sm"
                className="dg-btn-secondary"
                onClick={handleLdapTest}
                disabled={ldapTesting}
              >
                {ldapTesting ? <Loader2 className="h-3.5 w-3.5 mr-1 animate-spin" /> : <RefreshCw className="h-3.5 w-3.5 mr-1" />}
                测试连接
              </Button>
              <Button
                size="sm"
                className="dg-btn-primary"
                onClick={handleLdapSave}
                disabled={ldapSaving}
              >
                {ldapSaving ? t('k8s.topology.saving') : t('aiops.llmSave')}
              </Button>
            </div>
          </div>
        </CardContent>
      </Card>

      {ldapConfig && <LdapManagementSection {...props} />}
      </>
      )}
    </div>
  );
}