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: '实时运营',
    audience: '客户',
    description: '地图看车、在线监控、异常优先',
    items: [
      { itemKey: 'dashboard', text: '运营总览', icon: <IconHome /> },
      { itemKey: 'map', text: '实时地图', icon: <IconMapPin /> },
      { itemKey: 'realtime', text: '实时监控', icon: <IconActivity /> }
    ]
  },
  {
    title: '车辆服务',
    audience: '客户',
    description: '按 VIN、车牌、手机号管理车辆',
    items: [
      { itemKey: 'vehicles', text: '车辆中心', icon: <IconServer /> },
      { itemKey: 'detail', text: '车辆档案', icon: <IconSetting /> }
    ]
  },
  {
    title: '轨迹统计',
    audience: '客户',
    description: '回放轨迹、统计查询、导出数据',
    items: [
      { itemKey: 'history', text: '轨迹回放', icon: <IconMapPin /> },
      { itemKey: 'mileage', text: '统计查询', icon: <IconBarChartHStroked /> },
      { itemKey: 'history-query', text: '数据导出', icon: <IconHistogram /> }
    ]
  },
  {
    title: '告警通知',
    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: '接入运维',
    audience: '内部',
    description: '客户主流程外查看链路质量',
    items: [
      { itemKey: 'ops-quality', text: '运维质量', icon: <IconPulse /> }
    ]
  }
];

const customerPrimaryPath = [
  { label: '车辆地图', page: 'map' as const },
  { label: '轨迹回放', page: 'history' as const },
  { label: '统计查询', page: 'mileage' as const },
  { label: '数据导出', page: 'history-query' as const },
  { label: '告警通知', page: 'alert-events' as const }
];

const customerTaskPath = [
  { label: '地图看车', question: '车辆在哪里', page: 'map' as const },
  { label: '轨迹回放', question: '这段时间怎么跑', page: 'history' as const },
  { label: '统计查询', question: '里程怎么算', page: 'mileage' as const },
  { label: '数据导出', question: '证据怎么给客户', page: 'history-query' as const },
  { label: '告警通知', question: '异常谁处理', page: 'alert-events' as const }
];

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);
}

function customerStatusTitle(title?: string) {
  if (!title) {
    return '';
  }
  return title === '来源不完整' ? '数据通道不完整' : title;
}

function dateText(offsetDays = 0) {
  const date = new Date();
  date.setHours(0, 0, 0, 0);
  date.setDate(date.getDate() + offsetDays);
  const year = date.getFullYear();
  const month = String(date.getMonth() + 1).padStart(2, '0');
  const day = String(date.getDate()).padStart(2, '0');
  return `${year}-${month}-${day}`;
}

export function AppShell({
  activePage,
  linkIssueCount,
  activeAlertRuleCount,
  p0AlertRuleCount,
  platformRelease,
  currentVehicleStatus,
  currentVehicleLabel,
  currentVehicleConsistency,
  customerTimeWindow,
  onCustomerTimeWindowChange,
  onCopyCustomerScope,
  onChange,
  onCustomerTask,
  onVehicleSearch,
  children
}: {
  activePage: PageKey;
  linkIssueCount: number | null;
  activeAlertRuleCount?: number | null;
  p0AlertRuleCount?: number | null;
  platformRelease?: string;
  currentVehicleStatus?: VehicleServiceStatus;
  currentVehicleLabel?: string;
  currentVehicleConsistency?: VehicleSourceConsistency;
  customerTimeWindow?: Record<string, string>;
  onCustomerTimeWindowChange?: (filters: Record<string, string>) => void;
  onCopyCustomerScope?: () => void;
  onChange: (page: PageKey) => void;
  onCustomerTask?: (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 dateFrom = customerTimeWindow?.dateFrom ?? '';
  const dateTo = customerTimeWindow?.dateTo ?? '';

  const applyTimeWindowPreset = (days: number) => {
    onCustomerTimeWindowChange?.({
      dateFrom: dateText(-(days - 1)),
      dateTo: dateText()
    });
  };

  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: '统计', ariaLabel: '顶部统计查询', page: 'mileage' as const },
    { label: '导出', ariaLabel: '顶部数据导出', page: 'history-query' as const },
    { label: '告警', ariaLabel: '顶部告警事件', page: 'alert-events' 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>实时地图 / 轨迹统计 / 告警通知</span>
            </span>
          </div>
          <div className="vp-customer-primary-path" aria-label="客户主线">
            <div className="vp-customer-primary-path-head">
              <strong>客户主线</strong>
              <span>先看车，再查时间窗，最后导出和通知。</span>
            </div>
            <div className="vp-customer-primary-path-actions">
              {customerPrimaryPath.map((item) => (
                <button
                  key={item.page}
                  type="button"
                  className={selectedPage === item.page ? 'vp-customer-primary-path-action vp-customer-primary-path-action-active' : 'vp-customer-primary-path-action'}
                  onClick={() => onChange(item.page)}
                  aria-label={`客户主线 ${item.label}`}
                >
                  {item.label}
                </button>
              ))}
            </div>
            <div className="vp-customer-task-dispatch" aria-label="客户任务分发台">
              <div className="vp-customer-task-dispatch-head">
                <strong>客户任务分发台</strong>
                <span>输入 VIN / 车牌 / 手机号后，地图、轨迹、统计、导出和告警都围绕同一辆车服务。</span>
              </div>
              <div className="vp-customer-task-dispatch-actions">
                {customerTaskPath.map((item) => (
                  <button
                    key={item.page}
                    type="button"
                    className={selectedPage === item.page ? 'vp-customer-task-dispatch-action vp-customer-task-dispatch-action-active' : 'vp-customer-task-dispatch-action'}
                    onClick={() => (onCustomerTask ?? onChange)(item.page)}
                    aria-label={`客户任务 ${item.label} ${item.question}`}
                  >
                    <strong>{item.label}</strong>
                    <span>{item.question}</span>
                  </button>
                ))}
              </div>
            </div>
          </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">
              <div className="vp-topbar-time-window" aria-label="客户时间窗">
                <label>
                  <span>开始</span>
                  <input
                    aria-label="顶部时间窗开始"
                    type="date"
                    value={dateFrom}
                    onChange={(event) => onCustomerTimeWindowChange?.({ dateFrom: event.currentTarget.value, dateTo })}
                  />
                </label>
                <label>
                  <span>结束</span>
                  <input
                    aria-label="顶部时间窗结束"
                    type="date"
                    value={dateTo}
                    onChange={(event) => onCustomerTimeWindowChange?.({ dateFrom, dateTo: event.currentTarget.value })}
                  />
                </label>
                <div className="vp-topbar-time-window-presets">
                  <button type="button" aria-label="顶部时间窗 今天" onClick={() => applyTimeWindowPreset(1)}>今天</button>
                  <button type="button" aria-label="顶部时间窗 近7天" onClick={() => applyTimeWindowPreset(7)}>近7天</button>
                  <button type="button" aria-label="顶部时间窗 近30天" onClick={() => applyTimeWindowPreset(30)}>近30天</button>
                  <button type="button" aria-label="顶部时间窗 清空" onClick={() => onCustomerTimeWindowChange?.({})}>清空</button>
                </div>
              </div>
              {currentVehicleLabel ? <Tag color="grey">{currentVehicleLabel}</Tag> : null}
              {currentVehicleStatus ? (
                <Tag color={currentVehicleStatus.severity === 'ok' ? 'green' : currentVehicleStatus.severity === 'error' ? 'red' : 'orange'}>
                  当前车辆：{customerStatusTitle(currentVehicleStatus.title)}
                </Tag>
              ) : null}
              {currentVehicleConsistency ? (
                <Tag color={currentVehicleConsistency.severity === 'ok' ? 'green' : currentVehicleConsistency.severity === 'error' ? 'red' : 'orange'}>
                  一致性：{customerStatusTitle(currentVehicleConsistency.title) || `${currentVehicleConsistency.onlineSourceCount}/${currentVehicleConsistency.sourceCount} 数据通道`}
                </Tag>
              ) : null}
              <Tag color={amapConfigured ? 'green' : 'orange'}>{amapConfigured ? '高德地图就绪' : '高德地图待配置'}</Tag>
              <div className="vp-topbar-quick-actions" aria-label="车辆服务快捷入口">
                {quickActions.map((item) => (
                  <Button key={item.page} size="small" aria-label={item.ariaLabel} onClick={() => (onCustomerTask ?? onChange)(item.page)}>
                    {item.label}
                  </Button>
                ))}
              </div>
              <Button
                size="small"
                aria-label="顶部复制客户服务范围"
                onClick={onCopyCustomerScope}
              >
                复制范围
              </Button>
              <Button
                size="small"
                aria-label={`顶部${alertLabel}`}
                className={alertClassName}
                onClick={() => (onCustomerTask ?? onChange)('alert-events')}
              >
                {alertLabel}
              </Button>
              {platformRelease ? <span className="vp-topbar-release">版本 {platformRelease}</span> : null}
            </div>
          </header>
          {children}
        </main>
      </div>
    </div>
  );
}