import { IconAlarm, IconBell, IconRefresh, IconSearch } from '@douyinfe/semi-icons';
import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query';
import { FormEvent, memo, useEffect, useMemo, useState } from 'react';
import { Link, useSearchParams } from 'react-router-dom';
import { api } from '../../api/client';
import type { AlertEvent, AlertNotification, AlertQuery, AlertRule, AlertRuleInput, AlertStatus, MetricDefinition, Page } from '../../api/types';
import { actionLabels, alertValue, canAct, formatAlertTime, operatorLabels, ruleCondition, severityLabels, statusLabels, thresholdText } from '../domain/alert';
import { InlineError } from '../shared/AsyncState';
import { usePlatformSession } from '../auth/AuthGate';
import { canAdminister, canOperate } from '../auth/session';
import { QUERY_MEMORY, queryScopeKey, retainPreviousPageWithinScope } from '../queryPolicy';

type Tab = 'events' | 'rules' | 'notifications';
type Filters = { keyword: string; severity: string; status: string; ruleId: string; protocol: string; dateFrom: string; dateTo: string };
const EMPTY_FILTERS: Filters = { keyword: '', severity: '', status: '', ruleId: '', protocol: '', dateFrom: '', dateTo: '' };
const PROTOCOLS = ['GB32960', 'JT808', 'YUTONG_MQTT'];
const NUMERIC_OPERATORS = ['gt', 'gte', 'lt', 'lte', 'eq', 'neq', 'between', 'outside'];
const BOOLEAN_OPERATORS = ['eq', 'neq', 'changed'];

function SeverityTag({ severity }: Pick<AlertEvent, 'severity'>) { return <span className={`v2-alert-severity is-${severity}`}><i />{severityLabels[severity]}</span>; }
function StatusTag({ status }: Pick<AlertEvent, 'status'>) { return <span className={`v2-alert-status is-${status}`}>{statusLabels[status]}</span>; }

const AlertRows = memo(function AlertRows({ rows, selectedID, onSelect }: { rows: AlertEvent[]; selectedID: string; onSelect: (id: string) => void }) {
  return <>{rows.map((event) => <tr key={event.id} className={selectedID === event.id ? 'is-selected' : ''} onClick={() => onSelect(event.id)}>
    <td><input type="radio" name="alert-event" checked={selectedID === event.id} onChange={() => onSelect(event.id)} aria-label={`选择 ${event.ruleName}`} /></td>
    <td><SeverityTag severity={event.severity} /></td><td><strong>{event.plate || '—'}</strong><small>{event.vin}</small></td><td>{event.ruleName}</td><td>{event.protocol || '—'}</td>
    <td>{formatAlertTime(event.triggeredAt)}</td><td>{formatAlertTime(event.recoveredAt)}</td><td><StatusTag status={event.status} /></td><td>{alertValue(event)}</td><td>{thresholdText(event)}</td><td title={event.location}>{event.location || '—'}</td><td>{event.handler || '—'}</td>
  </tr>)}</>;
});

function EventInspector({ event, note, acting, actionError, editable, onNote, onAction }: { event?: AlertEvent; note: string; acting: boolean; actionError?: string; editable: boolean; onNote: (value: string) => void; onAction: (action: 'acknowledge' | 'close' | 'ignore') => void }) {
  if (!event) return <aside className="v2-alert-inspector"><div className="v2-alert-side-empty"><IconAlarm /><strong>选择告警事件</strong><span>查看触发证据、状态时间线和处置动作。</span></div></aside>;
  return <aside className="v2-alert-inspector"><header><div><strong>{event.ruleName}</strong><span><SeverityTag severity={event.severity} /><StatusTag status={event.status} /></span></div></header>
    <section><h3>事件信息</h3><dl><div><dt>事件 ID</dt><dd>{event.id}</dd></div><div><dt>规则 / 版本</dt><dd>{event.ruleId} / v{event.ruleVersion}</dd></div><div><dt>车辆 / VIN</dt><dd>{event.plate || '—'} / {event.vin}</dd></div><div><dt>触发时间</dt><dd>{formatAlertTime(event.triggeredAt)}</dd></div><div><dt>恢复时间</dt><dd>{formatAlertTime(event.recoveredAt)}</dd></div></dl></section>
    <section><h3>证据对比</h3><div className="v2-alert-evidence"><div><small>触发值</small><strong>{alertValue(event)}</strong></div><b>VS</b><div><small>阈值条件</small><strong>{thresholdText(event)}</strong></div></div><dl><div><dt>来源事件 ID</dt><dd>{event.sourceEventId || '—'}</dd></div><div><dt>协议</dt><dd>{event.protocol || '—'}</dd></div><div><dt>事件 / 接收</dt><dd>{formatAlertTime(event.eventAt)} / {formatAlertTime(event.receivedAt)}</dd></div></dl></section>
    <section><h3>处理进度</h3><div className="v2-alert-timeline">{event.actions?.map((item) => <article key={item.id}><i /><div><strong>{actionLabels[item.action] ?? item.action}</strong><span>{item.actor} · {formatAlertTime(item.createdAt)}</span>{item.note ? <p>{item.note}</p> : null}</div></article>)}</div></section>
    <section><h3>处置与备注</h3>{editable ? <><textarea maxLength={200} placeholder="请输入处置说明（选填）" value={note} onChange={(e) => onNote(e.target.value)} /><small className="v2-alert-note-count">{note.length}/200</small>{actionError ? <p className="v2-alert-action-error">{actionError}</p> : null}<div className="v2-alert-actions"><button className="is-primary" disabled={acting || !canAct(event.status, 'acknowledge')} onClick={() => onAction('acknowledge')}>确认告警</button><button disabled={acting || !canAct(event.status, 'close')} onClick={() => onAction('close')}>关闭</button><button disabled={acting || !canAct(event.status, 'ignore')} onClick={() => onAction('ignore')}>忽略</button></div></> : <p className="v2-role-notice">当前为只读角色，可查看完整证据与处置记录。</p>}</section>
    <nav className="v2-alert-links"><Link to={`/vehicles/${encodeURIComponent(event.vin)}`}>查看车辆</Link><Link to={`/tracks?vin=${encodeURIComponent(event.vin)}`}>查看轨迹</Link><Link to={`/history?vin=${encodeURIComponent(event.vin)}`}>历史数据</Link></nav>
  </aside>;
}

function EventWorkspace({ filters, draft, setDraft, setFilters, rules, unread, editable, onTab }: { filters: Filters; draft: Filters; setDraft: (next: Filters) => void; setFilters: (next: Filters) => void; rules: AlertRule[]; unread: number; editable: boolean; onTab: (tab: Tab) => void }) {
  const [offset, setOffset] = useState(0); const [limit, setLimit] = useState(20); const [selection, setSelection] = useState<{ scope: string; id: string }>(); const [note, setNote] = useState(''); const queryClient = useQueryClient();
  const [filtersCollapsed, setFiltersCollapsed] = useState(true);
  const [mobileLayout, setMobileLayout] = useState(() => typeof window !== 'undefined' && window.matchMedia('(max-width: 680px)').matches);
  useEffect(() => { const media = window.matchMedia('(max-width: 680px)'); const update = () => setMobileLayout(media.matches); media.addEventListener('change', update); update(); return () => media.removeEventListener('change', update); }, []);
  const query: AlertQuery = useMemo(() => ({ ...Object.fromEntries(Object.entries(filters).filter(([, value]) => value)), limit, offset }), [filters, limit, offset]);
  const baseQuery = useMemo(() => ({ ...query, limit: undefined, offset: undefined }), [query]);
  const eventScope = useMemo(() => queryScopeKey(baseQuery), [baseQuery]);
  const summary = useQuery({ queryKey: ['alert-summary-v2', baseQuery], queryFn: ({ signal }) => api.alertSummaryV2(baseQuery, signal), staleTime: 8_000, gcTime: QUERY_MEMORY.summaryGcTime });
  const events = useQuery<Page<AlertEvent>>({ queryKey: ['alert-events-v2', eventScope, limit, offset], queryFn: ({ signal }) => api.alertEventsV2(query, signal), placeholderData: retainPreviousPageWithinScope<Page<AlertEvent>>(eventScope), staleTime: 5_000, gcTime: QUERY_MEMORY.highVolumeGcTime });
  const rows = events.data?.items ?? [];
  const selectedID = selection?.scope === eventScope ? selection.id : '';
  useEffect(() => { if (!mobileLayout && rows.length && !rows.some((item) => item.id === selectedID)) setSelection({ scope: eventScope, id: rows[0].id }); }, [eventScope, mobileLayout, rows, selectedID]);
  const detail = useQuery({ queryKey: ['alert-event-v2', selectedID], queryFn: ({ signal }) => api.alertEventV2(selectedID, signal), enabled: Boolean(selectedID), staleTime: 3_000, gcTime: QUERY_MEMORY.summaryGcTime });
  const action = useMutation({ mutationFn: ({ name, event }: { name: 'acknowledge' | 'close' | 'ignore'; event: AlertEvent }) => api.actOnAlertV2(event.id, { version: event.version, action: name, note }), onSuccess: async (event) => { setNote(''); queryClient.setQueryData(['alert-event-v2', event.id], event); await Promise.all([queryClient.invalidateQueries({ queryKey: ['alert-events-v2'] }), queryClient.invalidateQueries({ queryKey: ['alert-summary-v2'] }), queryClient.invalidateQueries({ queryKey: ['alert-notifications-v2'] })]); } });
  const submit = (e: FormEvent) => { e.preventDefault(); setFilters(draft); setOffset(0); setFiltersCollapsed(true); };
  const quickStatus = (status: string) => { const next = { ...filters, status }; setDraft(next); setFilters(next); setOffset(0); };
  const totalPages = Math.max(1, Math.ceil((events.data?.total ?? 0) / limit)); const page = Math.floor(offset / limit) + 1; const sums = summary.data;
  const activeFilterCount = Object.values(filters).filter(Boolean).length;
  return <><button type="button" className="v2-mobile-filter-toggle" aria-expanded={!filtersCollapsed} onClick={() => setFiltersCollapsed((value) => !value)}><span><b>筛选条件</b><small>{activeFilterCount ? `已启用 ${activeFilterCount} 项` : '全部告警'}</small></span><em>{filtersCollapsed ? '展开' : '收起'}</em></button><form className={`v2-alert-filter${filtersCollapsed ? ' is-mobile-collapsed' : ''}`} onSubmit={submit}><label><span>关键词</span><div><IconSearch /><input value={draft.keyword} onChange={(e) => setDraft({ ...draft, keyword: e.target.value })} placeholder="车牌 / VIN / 规则名称" /></div></label><label><span>严重程度</span><select value={draft.severity} onChange={(e) => setDraft({ ...draft, severity: e.target.value })}><option value="">全部</option><option value="critical">紧急</option><option value="major">重要</option><option value="minor">一般</option></select></label><label><span>状态</span><select value={draft.status} onChange={(e) => setDraft({ ...draft, status: e.target.value })}><option value="">全部</option>{Object.entries(statusLabels).map(([value, label]) => <option key={value} value={value}>{label}</option>)}</select></label><label><span>规则</span><select value={draft.ruleId} onChange={(e) => setDraft({ ...draft, ruleId: e.target.value })}><option value="">全部</option>{rules.map((rule) => <option key={rule.id} value={rule.id}>{rule.name}</option>)}</select></label><label><span>协议</span><select value={draft.protocol} onChange={(e) => setDraft({ ...draft, protocol: e.target.value })}><option value="">全部</option>{PROTOCOLS.map((item) => <option key={item}>{item}</option>)}</select></label><label><span>起始时间</span><input type="datetime-local" value={draft.dateFrom} onChange={(e) => setDraft({ ...draft, dateFrom: e.target.value })} /></label><label><span>结束时间</span><input type="datetime-local" value={draft.dateTo} onChange={(e) => setDraft({ ...draft, dateTo: e.target.value })} /></label><button className="v2-primary-button">查询</button><button className="v2-secondary-button" type="button" onClick={() => { setDraft(EMPTY_FILTERS); setFilters(EMPTY_FILTERS); setOffset(0); }}>重置</button></form>
    {summary.isError ? <InlineError message={summary.error instanceof Error ? summary.error.message : '告警汇总读取失败'} onRetry={() => summary.refetch()} /> : null}
    <section className="v2-alert-kpis">{[['活跃告警', sums?.active, '', ''], ['未处理', sums?.unprocessed, 'unprocessed', 'unprocessed'], ['处理中', sums?.processing, 'processing', 'processing'], ['已恢复', sums?.recovered, 'recovered', 'recovered'], ['已关闭', sums?.closed, 'closed', 'closed'], ['已忽略', sums?.ignored, 'ignored', 'ignored'], ['未读通知', unread, 'notice', 'notice']].map(([label, value, tone, status]) => <button key={String(label)} type="button" className={`is-${tone}`} onClick={() => status === 'notice' ? onTab('notifications') : quickStatus(String(status))}><small>{label as string}</small><strong>{Number(value ?? 0).toLocaleString('zh-CN')}</strong></button>)}</section>
    {events.isError ? <InlineError message={events.error instanceof Error ? events.error.message : '告警事件读取失败'} onRetry={() => events.refetch()} /> : null}
    <div className="v2-alert-workspace"><section className="v2-alert-table-card"><header><strong>告警事件</strong><div><span>共 {(events.data?.total ?? 0).toLocaleString('zh-CN')} 条</span><button onClick={() => Promise.all([events.refetch(), summary.refetch(), ...(selectedID ? [detail.refetch()] : [])])}><IconRefresh />刷新</button></div></header><div className="v2-alert-table-scroll"><table><thead><tr><th /><th>严重程度</th><th>车牌 / VIN</th><th>规则</th><th>协议</th><th>触发时间</th><th>恢复时间</th><th>状态</th><th>触发值</th><th>阈值</th><th>位置</th><th>处理人</th></tr></thead><tbody><AlertRows rows={rows} selectedID={selectedID} onSelect={(id) => setSelection({ scope: eventScope, id })} /></tbody></table><div className="v2-alert-mobile-list">{rows.map((event) => <button type="button" key={event.id} className={selectedID === event.id ? 'is-selected' : ''} onClick={() => setSelection({ scope: eventScope, id: event.id })}><header><strong>{event.plate || '未绑定车牌'}</strong><span><SeverityTag severity={event.severity} /><StatusTag status={event.status} /></span></header><p>{event.ruleName}</p><dl><div><dt>触发时间</dt><dd>{formatAlertTime(event.triggeredAt)}</dd></div><div><dt>数据来源</dt><dd>{event.protocol || '—'}</dd></div><div><dt>触发值</dt><dd>{alertValue(event)}</dd></div><div><dt>阈值</dt><dd>{thresholdText(event)}</dd></div></dl></button>)}</div>{events.isFetching ? <div className="v2-alert-loading"><i />正在更新事件…</div> : null}{!events.isFetching && !rows.length ? <div className="v2-alert-empty">当前筛选条件没有告警事件</div> : null}</div><footer><span>第 {page} / {totalPages} 页</span><div><button disabled={page <= 1} onClick={() => setOffset(Math.max(0, offset - limit))}>上一页</button><button disabled={page >= totalPages} onClick={() => setOffset(offset + limit)}>下一页</button><select value={limit} onChange={(e) => { setLimit(Number(e.target.value)); setOffset(0); }}><option value="20">20 条/页</option><option value="50">50 条/页</option></select></div></footer></section><EventInspector event={detail.data ?? rows.find((row) => row.id === selectedID)} note={note} acting={action.isPending} actionError={action.error instanceof Error ? action.error.message : undefined} editable={editable} onNote={setNote} onAction={(name) => { const event = detail.data; if (event) action.mutate({ name, event }); }} /></div></>;
}

function emptyRule(): AlertRuleInput { return { id: '', name: '', description: '', severity: 'major', valueType: 'numeric', metric: 'speed_kmh', operator: 'gt', threshold: 80, thresholdHigh: 100, durationSec: 60, recoveryOperator: 'lte', recoveryThreshold: 75, repeatIntervalSec: 600, scopeProtocols: [], scopeVins: [], scopeOems: [], scopeModels: [], scopeCompanies: [], notificationChannels: ['in_app'], enabled: true, version: 0 }; }
function ruleDraft(rule: AlertRule): AlertRuleInput {
  return {
    id: rule.id, name: rule.name, description: rule.description, severity: rule.severity, valueType: rule.valueType,
    metric: rule.metric, operator: rule.operator, threshold: rule.threshold, thresholdHigh: rule.thresholdHigh, booleanThreshold: rule.booleanThreshold,
    durationSec: rule.durationSec, recoveryOperator: rule.recoveryOperator, recoveryThreshold: rule.recoveryThreshold,
    repeatIntervalSec: rule.repeatIntervalSec, scopeProtocols: [...(rule.scopeProtocols ?? [])], scopeVins: [...(rule.scopeVins ?? [])], scopeOems: [...(rule.scopeOems ?? [])], scopeModels: [...(rule.scopeModels ?? [])], scopeCompanies: [...(rule.scopeCompanies ?? [])],
    notificationChannels: [...(rule.notificationChannels ?? ['in_app'])], enabled: rule.enabled, version: rule.version
  };
}

function RulesWorkspace({ rules, metrics }: { rules: AlertRule[]; metrics: MetricDefinition[] }) {
  const queryClient = useQueryClient();
  const [selectedID, setSelectedID] = useState('');
  const [draft, setDraft] = useState<AlertRuleInput>(emptyRule());
  useEffect(() => { if (!selectedID && rules[0]) { setSelectedID(rules[0].id); setDraft(ruleDraft(rules[0])); } }, [rules, selectedID]);
  const save = useMutation({ mutationFn: api.saveAlertRuleV2, onSuccess: async (rule) => { setSelectedID(rule.id); setDraft(ruleDraft(rule)); await queryClient.invalidateQueries({ queryKey: ['alert-rules-v2'] }); } });
  const toggle = useMutation({ mutationFn: (rule: AlertRule) => api.setAlertRuleEnabledV2(rule.id, { version: rule.version, enabled: !rule.enabled }), onSuccess: async () => { await queryClient.invalidateQueries({ queryKey: ['alert-rules-v2'] }); } });
  const mutationError = save.error ?? toggle.error;
  const operators = draft.valueType === 'boolean' ? BOOLEAN_OPERATORS : NUMERIC_OPERATORS;
  const availableMetrics = metrics.filter((metric) => metric.alertable && metric.valueType === draft.valueType);
  const catalogLabels = Object.fromEntries(metrics.map((metric) => [metric.key, metric.label]));
  const setList = (key: 'scopeProtocols' | 'scopeVins' | 'scopeOems' | 'scopeModels' | 'scopeCompanies', value: string) => setDraft({ ...draft, [key]: value.split(',').map((item) => item.trim()).filter(Boolean) });
  return <div className="v2-alert-rules">
    <section className="v2-alert-rule-list"><header><strong>规则配置</strong><button onClick={() => { setSelectedID('__new__'); setDraft(emptyRule()); }}>+ 新建规则</button></header>{rules.map((rule) => <button className={selectedID === rule.id ? 'is-selected' : ''} key={rule.id} onClick={() => { setSelectedID(rule.id); setDraft(ruleDraft(rule)); }}><i className={`is-${rule.severity}`} /><span><strong>{rule.name}</strong><small>{ruleCondition(rule, catalogLabels)} · v{rule.version}</small></span><em className={rule.enabled ? 'is-enabled' : ''}>{rule.enabled ? '已启用' : '已停用'}</em></button>)}</section>
    <form className="v2-alert-rule-editor" onSubmit={(event) => { event.preventDefault(); save.mutate(draft); }}>
      <header><div><strong>{draft.version ? '编辑规则' : '新建规则'}</strong><span>数值、状态与主数据范围均纳入版本审计</span></div>{draft.version ? <button type="button" disabled={toggle.isPending || save.isPending} onClick={() => { const current = rules.find((item) => item.id === draft.id); if (current) toggle.mutate(current); }}>{toggle.isPending ? '更新中' : draft.enabled ? '停用规则' : '启用规则'}</button> : null}</header>
      <div className="v2-rule-form-grid">
        <label><span>规则名称</span><input required maxLength={80} value={draft.name} onChange={(e) => setDraft({ ...draft, name: e.target.value })} /></label>
        <label><span>严重程度</span><select value={draft.severity} onChange={(e) => setDraft({ ...draft, severity: e.target.value as AlertRuleInput['severity'] })}><option value="critical">紧急</option><option value="major">重要</option><option value="minor">一般</option></select></label>
        <label><span>值类型</span><select value={draft.valueType} onChange={(e) => { const valueType = e.target.value as AlertRuleInput['valueType']; const metric = metrics.find((item) => item.alertable && item.valueType === valueType)?.key ?? ''; setDraft({ ...draft, valueType, operator: valueType === 'boolean' ? 'eq' : 'gt', metric }); }}><option value="numeric">数值</option><option value="boolean">布尔</option></select></label>
        <label><span>指标</span><select required disabled={!availableMetrics.length} value={draft.metric} onChange={(e) => setDraft({ ...draft, metric: e.target.value })}>{availableMetrics.map((metric) => <option key={metric.key} value={metric.key}>{metric.label}{metric.unit ? ` (${metric.unit})` : ''}</option>)}</select></label>
        <label><span>触发比较符</span><select value={draft.operator} onChange={(e) => setDraft({ ...draft, operator: e.target.value, durationSec: e.target.value === 'changed' ? 0 : draft.durationSec })}>{operators.map((value) => <option key={value} value={value}>{operatorLabels[value]}</option>)}</select></label>
        {draft.operator === 'changed' ? <label><span>变化语义</span><input value="false ↔ true" disabled /></label> : draft.valueType === 'boolean' ? <label><span>目标值</span><select value={draft.booleanThreshold ? 'true' : 'false'} onChange={(e) => setDraft({ ...draft, booleanThreshold: e.target.value === 'true' })}><option value="true">是</option><option value="false">否</option></select></label> : <label><span>{draft.operator === 'between' || draft.operator === 'outside' ? '区间下限' : '触发阈值'}</span><input type="number" step="0.1" value={draft.threshold} onChange={(e) => setDraft({ ...draft, threshold: Number(e.target.value) })} /></label>}
        {draft.operator === 'between' || draft.operator === 'outside' ? <label><span>区间上限</span><input type="number" step="0.1" value={draft.thresholdHigh} onChange={(e) => setDraft({ ...draft, thresholdHigh: Number(e.target.value) })} /></label> : null}
        <label><span>持续时间（秒）</span><input type="number" min="0" max="86400" disabled={draft.operator === 'changed'} value={draft.durationSec} onChange={(e) => setDraft({ ...draft, durationSec: Number(e.target.value) })} /></label>
        <label><span>恢复比较符</span><select value={draft.recoveryOperator} onChange={(e) => setDraft({ ...draft, recoveryOperator: e.target.value })}><option value="">未配置</option>{['gt', 'gte', 'lt', 'lte', 'eq', 'neq'].map((value) => <option key={value} value={value}>{operatorLabels[value]}</option>)}</select></label>
        <label><span>恢复阈值</span><input type="number" step="0.1" value={draft.recoveryThreshold} onChange={(e) => setDraft({ ...draft, recoveryThreshold: Number(e.target.value) })} /></label>
        <label><span>重复间隔（秒）</span><input type="number" min="0" max="604800" value={draft.repeatIntervalSec} onChange={(e) => setDraft({ ...draft, repeatIntervalSec: Number(e.target.value) })} /></label>
        <label className="is-wide"><span>协议范围（逗号分隔；空为全部）</span><input value={draft.scopeProtocols.join(',')} onChange={(e) => setList('scopeProtocols', e.target.value)} /></label>
        <label className="is-wide"><span>车辆 VIN 范围（逗号分隔；空为全部）</span><input value={draft.scopeVins.join(',')} onChange={(e) => setList('scopeVins', e.target.value)} /></label>
        <label className="is-wide"><span>厂家范围（逗号分隔；空为全部）</span><input value={draft.scopeOems.join(',')} onChange={(e) => setList('scopeOems', e.target.value)} /></label>
        <label className="is-wide"><span>车型范围（来自车辆主档；空为全部）</span><input value={draft.scopeModels.join(',')} onChange={(e) => setList('scopeModels', e.target.value)} /></label>
        <label className="is-wide"><span>企业范围（来自车辆主档；空为全部）</span><input value={draft.scopeCompanies.join(',')} onChange={(e) => setList('scopeCompanies', e.target.value)} /></label>
        <label className="is-wide"><span>说明</span><textarea maxLength={500} value={draft.description} onChange={(e) => setDraft({ ...draft, description: e.target.value })} /></label>
      </div>
      <footer><div><b>通知通道</b><span>站内通知已启用；短信、邮件、企微为预留 / 未启用。</span></div>{mutationError ? <em>{mutationError.message}</em> : null}<button className="v2-primary-button" disabled={save.isPending || toggle.isPending}>{save.isPending ? '保存中' : '保存规则'}</button></footer>
    </form>
  </div>;
}

type NotificationsQuery = {
  data?: Page<AlertNotification>;
  error: Error | null;
  isError: boolean;
  refetch: () => unknown;
};

function NotificationsWorkspace({ editable, notifications }: { editable: boolean; notifications: NotificationsQuery }) {
  const queryClient = useQueryClient();
  const read = useMutation({ mutationFn: api.readAlertNotificationsV2, onSuccess: async () => { await Promise.all([queryClient.invalidateQueries({ queryKey: ['alert-notifications-v2'] }), queryClient.invalidateQueries({ queryKey: ['alert-summary-v2'] })]); } });
  return <div className="v2-alert-notifications"><header><div><strong>站内通知</strong><span>仅站内通道具备真实送达与已读状态</span></div>{editable ? <button disabled={read.isPending || !notifications.data?.items.some((item) => !item.read)} onClick={() => read.mutate(notifications.data?.items.filter((item) => !item.read).map((item) => item.id) ?? [])}>{read.isPending ? '正在更新' : '全部标为已读'}</button> : <span className="v2-role-badge">只读</span>}</header>{notifications.isError ? <InlineError message={notifications.error?.message ?? '站内通知读取失败'} onRetry={() => notifications.refetch()} /> : null}{read.isError ? <InlineError message={read.error instanceof Error ? read.error.message : '通知状态更新失败'} /> : null}<div>{notifications.data?.items.map((item) => <article className={item.read ? 'is-read' : ''} key={item.id}><i className={`is-${item.severity}`} /><div><strong>{item.title}</strong><p>{item.content}</p><span>{formatAlertTime(item.createdAt)} · {item.read ? '已读' : '未读'}</span></div>{editable && !item.read ? <button disabled={read.isPending} onClick={() => read.mutate([item.id])}>{read.isPending ? '更新中' : '标为已读'}</button> : null}</article>)}</div><footer><b>外部通知通道</b><span>短信（SMS）— 预留 / 未启用</span><span>邮件（Email）— 预留 / 未启用</span><span>企业微信（WeCom）— 预留 / 未启用</span></footer></div>;
}

export default function AlertsPage() {
  const { session } = usePlatformSession(); const operator = canOperate(session); const admin = canAdminister(session);
  const [params, setParams] = useSearchParams(); const initialTab = (params.get('tab') as Tab) || 'events'; const [tab, setTabState] = useState<Tab>(['events', 'rules', 'notifications'].includes(initialTab) ? initialTab : 'events');
  const initialFilters: Filters = { ...EMPTY_FILTERS, keyword: params.get('vin') ?? params.get('keyword') ?? '', severity: params.get('severity') ?? '', status: params.get('status') ?? '', ruleId: params.get('ruleId') ?? '', protocol: params.get('protocol') ?? '' };
  const activeTab = tab === 'rules' && !admin ? 'events' : tab;
  const [filters, setFilterState] = useState(initialFilters); const [eventDraft, setEventDraft] = useState(initialFilters);
  const rules = useQuery({ queryKey: ['alert-rules-v2'], queryFn: ({ signal }) => api.alertRulesV2(signal), staleTime: 30_000, gcTime: QUERY_MEMORY.summaryGcTime, enabled: activeTab !== 'notifications' });
  const metrics = useQuery({ queryKey: ['metric-catalog-v2'], queryFn: ({ signal }) => api.metricCatalog(signal), staleTime: 300_000, enabled: activeTab === 'rules' });
  const notices = useQuery({ queryKey: ['alert-notifications-v2', 'unread'], queryFn: ({ signal }) => api.alertNotificationsV2(new URLSearchParams({ unreadOnly: 'true', limit: '100' }), signal), staleTime: 5_000, gcTime: QUERY_MEMORY.summaryGcTime, enabled: activeTab !== 'notifications' });
  const notifications = useQuery({ queryKey: ['alert-notifications-v2', 'all'], queryFn: ({ signal }) => api.alertNotificationsV2(new URLSearchParams({ limit: '100' }), signal), staleTime: 5_000, gcTime: QUERY_MEMORY.summaryGcTime, enabled: activeTab === 'notifications' });
  const unread = activeTab === 'notifications'
    ? notifications.data?.items.filter((item) => !item.read).length ?? notices.data?.total ?? 0
    : notices.data?.total ?? 0;
  const setTab = (next: Tab) => { setTabState(next); const copy = new URLSearchParams(params); copy.set('tab', next); setParams(copy, { replace: true }); };
  const setFilters = (next: Filters) => { setFilterState(next); const copy = new URLSearchParams(); if (tab !== 'events') copy.set('tab', tab); Object.entries(next).forEach(([key, value]) => { if (value) copy.set(key, value); }); setParams(copy, { replace: true }); };
  return <div className="v2-alert-page"><header className="v2-alert-heading"><div><h2>告警中心</h2><p>统一监控告警事件，快速发现并处置车辆运行异常，保留数据质量与处置证据。</p></div></header><nav className="v2-alert-tabs"><button className={activeTab === 'events' ? 'is-active' : ''} onClick={() => setTab('events')}><IconAlarm />告警事件</button>{admin ? <button className={activeTab === 'rules' ? 'is-active' : ''} onClick={() => setTab('rules')}>规则配置</button> : null}<button className={activeTab === 'notifications' ? 'is-active' : ''} onClick={() => setTab('notifications')}><IconBell />站内通知{unread > 0 ? <b>{unread}</b> : null}</button></nav>{activeTab !== 'notifications' && rules.isError ? <InlineError message={rules.error.message} onRetry={() => rules.refetch()} /> : null}{activeTab === 'rules' && metrics.isError ? <InlineError message={metrics.error.message} onRetry={() => metrics.refetch()} /> : null}{activeTab === 'events' ? <EventWorkspace filters={filters} draft={eventDraft} setDraft={setEventDraft} setFilters={setFilters} rules={rules.data ?? []} unread={unread} editable={operator} onTab={setTab} /> : activeTab === 'rules' ? <RulesWorkspace rules={rules.data ?? []} metrics={metrics.data?.metrics ?? []} /> : <NotificationsWorkspace editable={operator} notifications={notifications} />}</div>;
}
