import { Button, Input, Nav, Space, Tag, Toast } from '@douyinfe/semi-ui';
import {
  IconActivity,
  IconBarChartHStroked,
  IconHistogram,
  IconHome,
  IconMapPin,
  IconSearch,
  IconServer,
  IconSetting,
  IconBell,
  IconPulse
} from '@douyinfe/semi-icons';
import type { ReactNode } from 'react';
import { useState } from 'react';
import type { VehicleSourceConsistency, VehicleServiceStatus } from '../api/types';
import { isAMapConfigured } from '../config/appConfig';

export type PageKey = 'dashboard' | 'vehicles' | 'map' | 'realtime' | 'detail' | 'history' | 'history-query' | 'mileage' | 'alert-events' | 'quality' | 'notification-rules' | 'ops-quality';

const navGroups = [
  {
    title: '车辆服务',
    audience: '客户',
    description: '以车辆为对象监控在线、位置和服务状态',
    items: [
      { itemKey: 'dashboard', text: '运营驾驶舱', icon: <IconHome /> },
      { itemKey: 'vehicles', text: '车辆中心', icon: <IconServer /> },
      { itemKey: 'map', text: '实时地图', icon: <IconMapPin /> },
      { itemKey: 'realtime', text: '实时监控', icon: <IconActivity /> },
      { itemKey: 'detail', text: '车辆档案', icon: <IconSetting /> }
    ]
  },
  {
    title: '数据交付',
    audience: '客户',
    description: '轨迹、里程、历史数据和客户导出',
    items: [
      { itemKey: 'history', text: '轨迹回放', icon: <IconMapPin /> },
      { itemKey: 'mileage', text: '里程统计', icon: <IconBarChartHStroked /> },
      { itemKey: 'history-query', text: '数据导出', icon: <IconHistogram /> }
    ]
  },
  {
    title: '告警闭环',
    audience: '客户',
    description: '断链、离线、定位异常和通知升级',
    items: [
      { itemKey: 'alert-events', text: '告警事件', icon: <IconHistogram /> },
      { itemKey: 'notification-rules', text: '通知规则', icon: <IconBell /> }
    ]
  },
  {
    title: '平台运维',
    audience: '内部',
    description: '客户主流程外查看接入链路和运行质量',
    items: [
      { itemKey: 'ops-quality', text: '运维质量', icon: <IconPulse /> }
    ]
  }
];

function linkHealthClassName(count: number | null) {
  if (count == null) {
    return '';
  }
  return count > 0 ? 'vp-link-health-button-warning' : 'vp-link-health-button-ok';
}

function alertButtonLabel(linkIssueCount: number | null, activeRuleCount?: number | null, p0RuleCount?: number | null) {
  const activeCount = Number.isFinite(Number(activeRuleCount)) ? Number(activeRuleCount) : 0;
  const p0Count = Number.isFinite(Number(p0RuleCount)) ? Number(p0RuleCount) : 0;
  if (p0Count > 0) {
    return `告警事件 P0 ${p0Count.toLocaleString()} / 活跃 ${activeCount.toLocaleString()}`;
  }
  if (activeCount > 0) {
    return `告警事件 ${activeCount.toLocaleString()}类规则`;
  }
  if (linkIssueCount == null) {
    return '告警事件';
  }
  return linkIssueCount > 0 ? `告警事件 ${linkIssueCount}项关注` : '告警事件正常';
}

function alertButtonClassName(linkIssueCount: number | null, activeRuleCount?: number | null, p0RuleCount?: number | null) {
  const activeCount = Number.isFinite(Number(activeRuleCount)) ? Number(activeRuleCount) : 0;
  const p0Count = Number.isFinite(Number(p0RuleCount)) ? Number(p0RuleCount) : 0;
  if (p0Count > 0 || activeCount > 0 || (linkIssueCount ?? 0) > 0) {
    return 'vp-link-health-button-warning';
  }
  return linkHealthClassName(linkIssueCount);
}

export function AppShell({
  activePage,
  linkIssueCount,
  activeAlertRuleCount,
  p0AlertRuleCount,
  platformRelease,
  currentVehicleStatus,
  currentVehicleLabel,
  currentVehicleConsistency,
  onChange,
  onVehicleSearch,
  children
}: {
  activePage: PageKey;
  linkIssueCount: number | null;
  activeAlertRuleCount?: number | null;
  p0AlertRuleCount?: number | null;
  platformRelease?: string;
  currentVehicleStatus?: VehicleServiceStatus;
  currentVehicleLabel?: string;
  currentVehicleConsistency?: VehicleSourceConsistency;
  onChange: (page: PageKey) => void;
  onVehicleSearch: (keyword: string) => void | Promise<void>;
  children: ReactNode;
}) {
  const [keyword, setKeyword] = useState('');
  const [searching, setSearching] = useState(false);
  const amapConfigured = isAMapConfigured();
  const alertLabel = alertButtonLabel(linkIssueCount, activeAlertRuleCount, p0AlertRuleCount);
  const alertClassName = alertButtonClassName(linkIssueCount, activeAlertRuleCount, p0AlertRuleCount);
  const selectedPage = activePage === 'quality' ? 'alert-events' : activePage;

  const search = () => {
    const value = keyword.trim();
    if (!value) {
      Toast.warning('请输入 VIN / 车牌 / 手机号');
      return;
    }
    setSearching(true);
    Promise.resolve(onVehicleSearch(value)).finally(() => setSearching(false));
  };

  const quickActions = [
    { label: '地图', ariaLabel: '顶部地图态势', page: 'map' as const },
    { label: '监控', ariaLabel: '顶部实时监控', page: 'realtime' as const },
    { label: '轨迹', ariaLabel: '顶部轨迹回放', page: 'history' as const },
    { label: '里程', ariaLabel: '顶部里程统计', page: 'mileage' as const },
    { label: '导出', ariaLabel: '顶部数据导出', page: 'history-query' as const }
  ];

  return (
    <div className="vp-app">
      <div className="vp-shell">
        <aside className="vp-sidebar">
          <div className="vp-brand">
            <span className="vp-brand-mark" />
            <span className="vp-brand-copy">
              <span>车辆服务中台</span>
              <span>车辆地图 / 里程统计 / 数据交付</span>
            </span>
          </div>
          <div className="vp-nav-groups">
            {navGroups.map((group) => (
              <div key={group.title} className="vp-nav-group">
                <div className="vp-nav-section-title">
                  <span className="vp-nav-section-title-main">
                    <span>{group.title}</span>
                    <Tag size="small" color={group.audience === '内部' ? 'grey' : 'blue'}>{group.audience}</Tag>
                  </span>
                  <small>{group.description}</small>
                </div>
                <Nav
                  selectedKeys={[selectedPage]}
                  items={group.items}
                  onSelect={({ itemKey }) => onChange(itemKey as PageKey)}
                  style={{ maxWidth: '100%' }}
                />
              </div>
            ))}
          </div>
        </aside>
        <main className="vp-main">
          <header className="vp-topbar">
            <Space spacing={12} className="vp-topbar-search">
              <Input
                prefix={<IconSearch />}
                placeholder="搜索 VIN / 车牌 / 手机号"
                value={keyword}
                onChange={setKeyword}
                onEnterPress={search}
                style={{ width: 320 }}
              />
              <Button theme="solid" type="primary" loading={searching} onClick={search}>查询车辆</Button>
            </Space>
            <div className="vp-topbar-context">
              {currentVehicleLabel ? <Tag color="grey">{currentVehicleLabel}</Tag> : null}
              {currentVehicleStatus ? (
                <Tag color={currentVehicleStatus.severity === 'ok' ? 'green' : currentVehicleStatus.severity === 'error' ? 'red' : 'orange'}>
                  当前车辆：{currentVehicleStatus.title}
                </Tag>
              ) : null}
              {currentVehicleConsistency ? (
                <Tag color={currentVehicleConsistency.severity === 'ok' ? 'green' : currentVehicleConsistency.severity === 'error' ? 'red' : 'orange'}>
                  一致性：{currentVehicleConsistency.title || `${currentVehicleConsistency.onlineSourceCount}/${currentVehicleConsistency.sourceCount} 来源`}
                </Tag>
              ) : null}
              <Tag color={amapConfigured ? 'green' : 'orange'}>{amapConfigured ? '地图就绪' : '地图待配置'}</Tag>
              <div className="vp-topbar-quick-actions" aria-label="车辆服务快捷入口">
                {quickActions.map((item) => (
                  <Button key={item.page} size="small" aria-label={item.ariaLabel} onClick={() => onChange(item.page)}>
                    {item.label}
                  </Button>
                ))}
              </div>
              <Button
                size="small"
                aria-label={`顶部${alertLabel}`}
                className={alertClassName}
                onClick={() => onChange('alert-events')}
              >
                {alertLabel}
              </Button>
              {platformRelease ? <span className="vp-topbar-release">版本 {platformRelease}</span> : null}
            </div>
          </header>
          {children}
        </main>
      </div>
    </div>
  );
}